^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * OF helpers for the GPIO API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2007-2008 MontaVista Software, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/of_address.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/pinctrl/pinctrl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/gpio/machine.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "gpiolib.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "gpiolib-of.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * of_gpio_spi_cs_get_count() - special GPIO counting for SPI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * @dev: Consuming device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * @con_id: Function within the GPIO consumer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * Some elder GPIO controllers need special quirks. Currently we handle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * the Freescale and PPC GPIO controller with bindings that doesn't use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * established "cs-gpios" for chip selects but instead rely on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * "gpios" for the chip select lines. If we detect this, we redirect
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * the counting of "cs-gpios" to count "gpios" transparent to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static int of_gpio_spi_cs_get_count(struct device *dev, const char *con_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (!IS_ENABLED(CONFIG_SPI_MASTER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (!con_id || strcmp(con_id, "cs"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (!of_device_is_compatible(np, "fsl,spi") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) !of_device_is_compatible(np, "aeroflexgaisler,spictrl") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) !of_device_is_compatible(np, "ibm,ppc4xx-spi"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return of_gpio_named_count(np, "gpios");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * This is used by external users of of_gpio_count() from <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * FIXME: get rid of those external users by converting them to GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * descriptors and let them all use gpiod_count()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int of_gpio_get_count(struct device *dev, const char *con_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) char propname[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ret = of_gpio_spi_cs_get_count(dev, con_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (ret > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (con_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) snprintf(propname, sizeof(propname), "%s-%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) con_id, gpio_suffixes[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) snprintf(propname, sizeof(propname), "%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) gpio_suffixes[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) ret = of_gpio_named_count(dev->of_node, propname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (ret > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return ret ? ret : -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static int of_gpiochip_match_node_and_xlate(struct gpio_chip *chip, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct of_phandle_args *gpiospec = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return chip->gpiodev->dev.of_node == gpiospec->np &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) chip->of_xlate &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) chip->of_xlate(chip, gpiospec, NULL) >= 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static struct gpio_chip *of_find_gpiochip_by_xlate(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct of_phandle_args *gpiospec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return gpiochip_find(gpiospec, of_gpiochip_match_node_and_xlate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static struct gpio_desc *of_xlate_and_get_gpiod_flags(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct of_phandle_args *gpiospec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) enum of_gpio_flags *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (chip->of_gpio_n_cells != gpiospec->args_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ret = chip->of_xlate(chip, gpiospec, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return gpiochip_get_desc(chip, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * of_gpio_need_valid_mask() - figure out if the OF GPIO driver needs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * to set the .valid_mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * @gc: the target gpio_chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * Return: true if the valid mask needs to be set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) bool of_gpio_need_valid_mask(const struct gpio_chip *gc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct device_node *np = gc->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) size = of_property_count_u32_elems(np, "gpio-reserved-ranges");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) if (size > 0 && size % 2 == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static void of_gpio_flags_quirks(struct device_node *np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) const char *propname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) enum of_gpio_flags *flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) int index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * Some GPIO fixed regulator quirks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * Note that active low is the default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (IS_ENABLED(CONFIG_REGULATOR) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) (of_device_is_compatible(np, "regulator-fixed") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) of_device_is_compatible(np, "reg-fixed-voltage") ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) (!(strcmp(propname, "enable-gpio") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) strcmp(propname, "enable-gpios")) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) of_device_is_compatible(np, "regulator-gpio")))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) bool active_low = !of_property_read_bool(np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) "enable-active-high");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * The regulator GPIO handles are specified such that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * presence or absence of "enable-active-high" solely controls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * the polarity of the GPIO line. Any phandle flags must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * be actively ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if ((*flags & OF_GPIO_ACTIVE_LOW) && !active_low) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) pr_warn("%s GPIO handle specifies active low - ignored\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) of_node_full_name(np));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) *flags &= ~OF_GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (active_low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) *flags |= OF_GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * Legacy open drain handling for fixed voltage regulators.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (IS_ENABLED(CONFIG_REGULATOR) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) of_device_is_compatible(np, "reg-fixed-voltage") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) of_property_read_bool(np, "gpio-open-drain")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) *flags |= (OF_GPIO_SINGLE_ENDED | OF_GPIO_OPEN_DRAIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) pr_info("%s uses legacy open drain flag - update the DTS if you can\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) of_node_full_name(np));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * Legacy handling of SPI active high chip select. If we have a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * property named "cs-gpios" we need to inspect the child node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * to determine if the flags should have inverted semantics.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (IS_ENABLED(CONFIG_SPI_MASTER) && !strcmp(propname, "cs-gpios") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) of_property_read_bool(np, "cs-gpios")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct device_node *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) u32 cs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) for_each_child_of_node(np, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) ret = of_property_read_u32(child, "reg", &cs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (cs == index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * SPI children have active low chip selects
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * by default. This can be specified negatively
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * by just omitting "spi-cs-high" in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * device node, or actively by tagging on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * GPIO_ACTIVE_LOW as flag in the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * tree. If the line is simultaneously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * tagged as active low in the device tree
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * and has the "spi-cs-high" set, we get a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * conflict and the "spi-cs-high" flag will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * take precedence.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (of_property_read_bool(child, "spi-cs-high")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (*flags & OF_GPIO_ACTIVE_LOW) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) pr_warn("%s GPIO handle specifies active low - ignored\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) of_node_full_name(child));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) *flags &= ~OF_GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (!(*flags & OF_GPIO_ACTIVE_LOW))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) pr_info("%s enforce active low on chipselect handle\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) of_node_full_name(child));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) *flags |= OF_GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) of_node_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) /* Legacy handling of stmmac's active-low PHY reset line */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if (IS_ENABLED(CONFIG_STMMAC_ETH) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) !strcmp(propname, "snps,reset-gpio") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) of_property_read_bool(np, "snps,reset-active-low"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) *flags |= OF_GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * of_get_named_gpiod_flags() - Get a GPIO descriptor and flags for GPIO API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * @np: device node to get GPIO from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * @propname: property name containing gpio specifier(s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * @index: index of the GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * @flags: a flags pointer to fill in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * Returns GPIO descriptor to use with Linux GPIO API, or one of the errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * value on the error condition. If @flags is not NULL the function also fills
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * in flags for the GPIO.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) const char *propname, int index, enum of_gpio_flags *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct of_phandle_args gpiospec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct gpio_chip *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) struct gpio_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) ret = of_parse_phandle_with_args_map(np, propname, "gpio", index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) &gpiospec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) pr_debug("%s: can't parse '%s' property of node '%pOF[%d]'\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) __func__, propname, np, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) chip = of_find_gpiochip_by_xlate(&gpiospec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (!chip) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) desc = ERR_PTR(-EPROBE_DEFER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) desc = of_xlate_and_get_gpiod_flags(chip, &gpiospec, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (IS_ERR(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) of_gpio_flags_quirks(np, propname, flags, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) pr_debug("%s: parsed '%s' property of node '%pOF[%d]' - status (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) __func__, propname, np, index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) PTR_ERR_OR_ZERO(desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) of_node_put(gpiospec.np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) int of_get_named_gpio_flags(struct device_node *np, const char *list_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) int index, enum of_gpio_flags *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) struct gpio_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) desc = of_get_named_gpiod_flags(np, list_name, index, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (IS_ERR(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return PTR_ERR(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return desc_to_gpio(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) EXPORT_SYMBOL_GPL(of_get_named_gpio_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * gpiod_get_from_of_node() - obtain a GPIO from an OF node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) * @node: handle of the OF node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) * @propname: name of the DT property representing the GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * @index: index of the GPIO to obtain for the consumer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * @dflags: GPIO initialization flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * @label: label to attach to the requested GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * On successful request the GPIO pin is configured in accordance with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * provided @dflags.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * In case of error an ERR_PTR() is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) const char *propname, int index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) enum gpiod_flags dflags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) const char *label)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) struct gpio_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) enum of_gpio_flags flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) bool active_low = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) bool single_ended = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) bool open_drain = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) bool transitory = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) desc = of_get_named_gpiod_flags(node, propname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) index, &flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) if (!desc || IS_ERR(desc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) active_low = flags & OF_GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) single_ended = flags & OF_GPIO_SINGLE_ENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) open_drain = flags & OF_GPIO_OPEN_DRAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) transitory = flags & OF_GPIO_TRANSITORY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) ret = gpiod_request(desc, label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (ret == -EBUSY && (dflags & GPIOD_FLAGS_BIT_NONEXCLUSIVE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (active_low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) lflags |= GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (single_ended) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (open_drain)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) lflags |= GPIO_OPEN_DRAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) lflags |= GPIO_OPEN_SOURCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (transitory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) lflags |= GPIO_TRANSITORY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if (flags & OF_GPIO_PULL_UP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) lflags |= GPIO_PULL_UP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (flags & OF_GPIO_PULL_DOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) lflags |= GPIO_PULL_DOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) ret = gpiod_configure_flags(desc, propname, lflags, dflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) gpiod_put(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) EXPORT_SYMBOL_GPL(gpiod_get_from_of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * The SPI GPIO bindings happened before we managed to establish that GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) * properties should be named "foo-gpios" so we have this special kludge for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) * them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) static struct gpio_desc *of_find_spi_gpio(struct device *dev, const char *con_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) enum of_gpio_flags *of_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) char prop_name[32]; /* 32 is max size of property name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) struct gpio_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * Hopefully the compiler stubs the rest of the function if this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * is false.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (!IS_ENABLED(CONFIG_SPI_MASTER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /* Allow this specifically for "spi-gpio" devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (!of_device_is_compatible(np, "spi-gpio") || !con_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) /* Will be "gpio-sck", "gpio-mosi" or "gpio-miso" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) snprintf(prop_name, sizeof(prop_name), "%s-%s", "gpio", con_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) desc = of_get_named_gpiod_flags(np, prop_name, 0, of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * The old Freescale bindings use simply "gpios" as name for the chip select
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * lines rather than "cs-gpios" like all other SPI hardware. Account for this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) * with a special quirk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) const char *con_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) unsigned int idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (!IS_ENABLED(CONFIG_SPI_MASTER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) /* Allow this specifically for Freescale and PPC devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (!of_device_is_compatible(np, "fsl,spi") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) !of_device_is_compatible(np, "aeroflexgaisler,spictrl") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) !of_device_is_compatible(np, "ibm,ppc4xx-spi"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) /* Allow only if asking for "cs-gpios" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (!con_id || strcmp(con_id, "cs"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * While all other SPI controllers use "cs-gpios" the Freescale
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) * uses just "gpios" so translate to that when "cs-gpios" is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * requested.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) return of_find_gpio(dev, NULL, idx, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * Some regulator bindings happened before we managed to establish that GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * properties should be named "foo-gpios" so we have this special kludge for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) static struct gpio_desc *of_find_regulator_gpio(struct device *dev, const char *con_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) enum of_gpio_flags *of_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) /* These are the connection IDs we accept as legacy GPIO phandles */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) const char *whitelist[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) "wlf,ldoena", /* Arizona */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) "wlf,ldo1ena", /* WM8994 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) "wlf,ldo2ena", /* WM8994 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct device_node *np = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct gpio_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) if (!IS_ENABLED(CONFIG_REGULATOR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) if (!con_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) i = match_string(whitelist, ARRAY_SIZE(whitelist), con_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) if (i < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) desc = of_get_named_gpiod_flags(np, con_id, 0, of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) static struct gpio_desc *of_find_arizona_gpio(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) const char *con_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) enum of_gpio_flags *of_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (!IS_ENABLED(CONFIG_MFD_ARIZONA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) if (!con_id || strcmp(con_id, "wlf,reset"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return of_get_named_gpiod_flags(dev->of_node, con_id, 0, of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) static struct gpio_desc *of_find_usb_gpio(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) const char *con_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) enum of_gpio_flags *of_flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) * Currently this USB quirk is only for the Fairchild FUSB302 host which is using
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) * an undocumented DT GPIO line named "fcs,int_n" without the compulsory "-gpios"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) * suffix.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (!IS_ENABLED(CONFIG_TYPEC_FUSB302))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (!con_id || strcmp(con_id, "fcs,int_n"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return ERR_PTR(-ENOENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return of_get_named_gpiod_flags(dev->of_node, con_id, 0, of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) unsigned int idx, unsigned long *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) char prop_name[32]; /* 32 is max size of property name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) enum of_gpio_flags of_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) struct gpio_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) /* Try GPIO property "foo-gpios" and "foo-gpio" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (con_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) snprintf(prop_name, sizeof(prop_name), "%s-%s", con_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) gpio_suffixes[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) snprintf(prop_name, sizeof(prop_name), "%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) gpio_suffixes[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) desc = of_get_named_gpiod_flags(dev->of_node, prop_name, idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) &of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (!IS_ERR(desc) || PTR_ERR(desc) != -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (PTR_ERR(desc) == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) /* Special handling for SPI GPIOs if used */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) desc = of_find_spi_gpio(dev, con_id, &of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) if (PTR_ERR(desc) == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) /* This quirk looks up flags and all */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) desc = of_find_spi_cs_gpio(dev, con_id, idx, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) if (!IS_ERR(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) if (PTR_ERR(desc) == -ENOENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) /* Special handling for regulator GPIOs if used */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) desc = of_find_regulator_gpio(dev, con_id, &of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) if (PTR_ERR(desc) == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) desc = of_find_arizona_gpio(dev, con_id, &of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) if (PTR_ERR(desc) == -ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) desc = of_find_usb_gpio(dev, con_id, &of_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (IS_ERR(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) if (of_flags & OF_GPIO_ACTIVE_LOW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) *flags |= GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (of_flags & OF_GPIO_SINGLE_ENDED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (of_flags & OF_GPIO_OPEN_DRAIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) *flags |= GPIO_OPEN_DRAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) *flags |= GPIO_OPEN_SOURCE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) if (of_flags & OF_GPIO_TRANSITORY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) *flags |= GPIO_TRANSITORY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) if (of_flags & OF_GPIO_PULL_UP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) *flags |= GPIO_PULL_UP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) if (of_flags & OF_GPIO_PULL_DOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) *flags |= GPIO_PULL_DOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * of_parse_own_gpio() - Get a GPIO hog descriptor, names and flags for GPIO API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * @np: device node to get GPIO from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) * @chip: GPIO chip whose hog is parsed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) * @idx: Index of the GPIO to parse
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) * @name: GPIO line name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) * @lflags: bitmask of gpio_lookup_flags GPIO_* values - returned from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) * of_find_gpio() or of_parse_own_gpio()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) * @dflags: gpiod_flags - optional GPIO initialization flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) * Returns GPIO descriptor to use with Linux GPIO API, or one of the errno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * value on the error condition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) unsigned int idx, const char **name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) unsigned long *lflags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) enum gpiod_flags *dflags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) struct device_node *chip_np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) enum of_gpio_flags xlate_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct of_phandle_args gpiospec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) struct gpio_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) u32 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) chip_np = chip->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if (!chip_np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) xlate_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) *lflags = GPIO_LOOKUP_FLAGS_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) *dflags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) ret = of_property_read_u32(chip_np, "#gpio-cells", &tmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) gpiospec.np = chip_np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) gpiospec.args_count = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) for (i = 0; i < tmp; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) ret = of_property_read_u32_index(np, "gpios", idx * tmp + i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) &gpiospec.args[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return ERR_PTR(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) desc = of_xlate_and_get_gpiod_flags(chip, &gpiospec, &xlate_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (IS_ERR(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) if (xlate_flags & OF_GPIO_ACTIVE_LOW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) *lflags |= GPIO_ACTIVE_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) if (xlate_flags & OF_GPIO_TRANSITORY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) *lflags |= GPIO_TRANSITORY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) if (xlate_flags & OF_GPIO_PULL_UP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) *lflags |= GPIO_PULL_UP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) if (xlate_flags & OF_GPIO_PULL_DOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) *lflags |= GPIO_PULL_DOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) if (of_property_read_bool(np, "input"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) *dflags |= GPIOD_IN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) else if (of_property_read_bool(np, "output-low"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) *dflags |= GPIOD_OUT_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) else if (of_property_read_bool(np, "output-high"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) *dflags |= GPIOD_OUT_HIGH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) pr_warn("GPIO line %d (%pOFn): no hogging state specified, bailing out\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) desc_to_gpio(desc), np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) if (name && of_property_read_string(np, "line-name", name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) *name = np->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) * of_gpiochip_add_hog - Add all hogs in a hog device node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) * @chip: gpio chip to act on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) * @hog: device node describing the hogs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) * Returns error if it fails otherwise 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) static int of_gpiochip_add_hog(struct gpio_chip *chip, struct device_node *hog)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) enum gpiod_flags dflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) struct gpio_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) unsigned long lflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) for (i = 0;; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) desc = of_parse_own_gpio(hog, chip, i, &name, &lflags, &dflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) if (IS_ERR(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) ret = gpiod_hog(desc, name, lflags, dflags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) #ifdef CONFIG_OF_DYNAMIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) desc->hog = hog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) * of_gpiochip_scan_gpios - Scan gpio-controller for gpio definitions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) * @chip: gpio chip to act on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) * This is only used by of_gpiochip_add to request/set GPIO initial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) * configuration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) * It returns error if it fails otherwise 0 on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) static int of_gpiochip_scan_gpios(struct gpio_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) for_each_available_child_of_node(chip->of_node, np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) if (!of_property_read_bool(np, "gpio-hog"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) ret = of_gpiochip_add_hog(chip, np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) of_node_put(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) of_node_set_flag(np, OF_POPULATED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) #ifdef CONFIG_OF_DYNAMIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) * of_gpiochip_remove_hog - Remove all hogs in a hog device node
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) * @chip: gpio chip to act on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) * @hog: device node describing the hogs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) static void of_gpiochip_remove_hog(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) struct device_node *hog)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct gpio_desc *descs = chip->gpiodev->descs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) for (i = 0; i < chip->ngpio; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) if (test_bit(FLAG_IS_HOGGED, &descs[i].flags) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) descs[i].hog == hog)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) gpiochip_free_own_desc(&descs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) static int of_gpiochip_match_node(struct gpio_chip *chip, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) return chip->gpiodev->dev.of_node == data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) static struct gpio_chip *of_find_gpiochip_by_node(struct device_node *np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) return gpiochip_find(np, of_gpiochip_match_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) static int of_gpio_notify(struct notifier_block *nb, unsigned long action,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) struct of_reconfig_data *rd = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) struct gpio_chip *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) * This only supports adding and removing complete gpio-hog nodes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) * Modifying an existing gpio-hog node is not supported (except for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * changing its "status" property, which is treated the same as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) * addition/removal).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) switch (of_reconfig_get_state_change(action, arg)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) case OF_RECONFIG_CHANGE_ADD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) if (!of_property_read_bool(rd->dn, "gpio-hog"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) return NOTIFY_OK; /* not for us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) if (of_node_test_and_set_flag(rd->dn, OF_POPULATED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) chip = of_find_gpiochip_by_node(rd->dn->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) if (chip == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) return NOTIFY_OK; /* not for us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) ret = of_gpiochip_add_hog(chip, rd->dn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) pr_err("%s: failed to add hogs for %pOF\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) rd->dn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) of_node_clear_flag(rd->dn, OF_POPULATED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) return notifier_from_errno(ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) case OF_RECONFIG_CHANGE_REMOVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) if (!of_node_check_flag(rd->dn, OF_POPULATED))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) return NOTIFY_OK; /* already depopulated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) chip = of_find_gpiochip_by_node(rd->dn->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) if (chip == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) return NOTIFY_OK; /* not for us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) of_gpiochip_remove_hog(chip, rd->dn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) of_node_clear_flag(rd->dn, OF_POPULATED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) struct notifier_block gpio_of_notifier = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) .notifier_call = of_gpio_notify,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) #endif /* CONFIG_OF_DYNAMIC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) * of_gpio_simple_xlate - translate gpiospec to the GPIO number and flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) * @gc: pointer to the gpio_chip structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) * @gpiospec: GPIO specifier as found in the device tree
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) * @flags: a flags pointer to fill in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) * This is simple translation function, suitable for the most 1:1 mapped
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) * GPIO chips. This function performs only one sanity check: whether GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) * is less than ngpios (that is specified in the gpio_chip).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) static int of_gpio_simple_xlate(struct gpio_chip *gc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) const struct of_phandle_args *gpiospec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) u32 *flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) * We're discouraging gpio_cells < 2, since that way you'll have to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) * write your own xlate function (that will have to retrieve the GPIO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) * number and the flags from a single gpio cell -- this is possible,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) * but not recommended).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) if (gc->of_gpio_n_cells < 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) WARN_ON(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) if (gpiospec->args[0] >= gc->ngpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) if (flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) *flags = gpiospec->args[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) return gpiospec->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) * of_mm_gpiochip_add_data - Add memory mapped GPIO chip (bank)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) * @np: device node of the GPIO chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) * @mm_gc: pointer to the of_mm_gpio_chip allocated structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) * @data: driver data to store in the struct gpio_chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) * To use this function you should allocate and fill mm_gc with:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) * 1) In the gpio_chip structure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) * - all the callbacks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) * - of_gpio_n_cells
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) * - of_xlate callback (optional)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) * 3) In the of_mm_gpio_chip structure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) * - save_regs callback (optional)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) * If succeeded, this function will map bank's memory and will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) * do all necessary work for you. Then you'll able to use .regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) * to manage GPIOs from the callbacks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) int of_mm_gpiochip_add_data(struct device_node *np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) struct of_mm_gpio_chip *mm_gc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) int ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) struct gpio_chip *gc = &mm_gc->gc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) gc->label = kasprintf(GFP_KERNEL, "%pOF", np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) if (!gc->label)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) goto err0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) mm_gc->regs = of_iomap(np, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) if (!mm_gc->regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) goto err1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) gc->base = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) if (mm_gc->save_regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) mm_gc->save_regs(mm_gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) mm_gc->gc.of_node = np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) ret = gpiochip_add_data(gc, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) goto err2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) err2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) iounmap(mm_gc->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) err1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) kfree(gc->label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) err0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) pr_err("%pOF: GPIO chip registration failed with status %d\n", np, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) EXPORT_SYMBOL_GPL(of_mm_gpiochip_add_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) * of_mm_gpiochip_remove - Remove memory mapped GPIO chip (bank)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) * @mm_gc: pointer to the of_mm_gpio_chip allocated structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) struct gpio_chip *gc = &mm_gc->gc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) if (!mm_gc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) gpiochip_remove(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) iounmap(mm_gc->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) kfree(gc->label);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) EXPORT_SYMBOL_GPL(of_mm_gpiochip_remove);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) static void of_gpiochip_init_valid_mask(struct gpio_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) int len, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) u32 start, count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) struct device_node *np = chip->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) len = of_property_count_u32_elems(np, "gpio-reserved-ranges");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) if (len < 0 || len % 2 != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) for (i = 0; i < len; i += 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) of_property_read_u32_index(np, "gpio-reserved-ranges",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) i, &start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) of_property_read_u32_index(np, "gpio-reserved-ranges",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) i + 1, &count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) if (start >= chip->ngpio || start + count >= chip->ngpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) bitmap_clear(chip->valid_mask, start, count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) #ifdef CONFIG_PINCTRL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) static int of_gpiochip_add_pin_range(struct gpio_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) struct device_node *np = chip->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) struct of_phandle_args pinspec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) struct pinctrl_dev *pctldev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) int index = 0, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) static const char group_names_propname[] = "gpio-ranges-group-names";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) struct property *group_names;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) group_names = of_find_property(np, group_names_propname, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) for (;; index++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) index, &pinspec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) pctldev = of_pinctrl_get(pinspec.np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) of_node_put(pinspec.np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) if (!pctldev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) if (pinspec.args[2]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) if (group_names) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) of_property_read_string_index(np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) group_names_propname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) index, &name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) if (strlen(name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) pr_err("%pOF: Group name of numeric GPIO ranges must be the empty string.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) /* npins != 0: linear range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) ret = gpiochip_add_pin_range(chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) pinctrl_dev_get_devname(pctldev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) pinspec.args[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) pinspec.args[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) pinspec.args[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) /* npins == 0: special range */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) if (pinspec.args[1]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) pr_err("%pOF: Illegal gpio-range format.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) if (!group_names) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) pr_err("%pOF: GPIO group range requested but no %s property.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) np, group_names_propname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) ret = of_property_read_string_index(np,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) group_names_propname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) index, &name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) if (!strlen(name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) pr_err("%pOF: Group name of GPIO group range cannot be the empty string.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) ret = gpiochip_add_pingroup_range(chip, pctldev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) pinspec.args[0], name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) static int of_gpiochip_add_pin_range(struct gpio_chip *chip) { return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) int of_gpiochip_add(struct gpio_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) if (!chip->of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) if (!chip->of_xlate) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) chip->of_gpio_n_cells = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) chip->of_xlate = of_gpio_simple_xlate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) if (chip->of_gpio_n_cells > MAX_PHANDLE_ARGS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) of_gpiochip_init_valid_mask(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) ret = of_gpiochip_add_pin_range(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) of_node_get(chip->of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) ret = of_gpiochip_scan_gpios(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) of_node_put(chip->of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) void of_gpiochip_remove(struct gpio_chip *chip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) of_node_put(chip->of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) void of_gpio_dev_init(struct gpio_chip *gc, struct gpio_device *gdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) /* If the gpiochip has an assigned OF node this takes precedence */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) if (gc->of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) gdev->dev.of_node = gc->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) gc->of_node = gdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) if (gdev->dev.of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) gdev->dev.fwnode = of_fwnode_handle(gdev->dev.of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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