^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Keerthy <j-keerthy@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This program is free software; you can redistribute it and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * modify it under the terms of the GNU General Public License version 2 as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This program is distributed "as is" WITHOUT ANY WARRANTY of any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * kind, whether expressed or implied; without even the implied warranty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * GNU General Public License version 2 for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Based on the TPS65218 driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mfd/lp873x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define BITS_PER_GPO 0x4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define LP873X_GPO_CTRL_OD 0x2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct lp873x_gpio {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct gpio_chip chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct lp873x *lp873;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int lp873x_gpio_get_direction(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* This device is output only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return GPIO_LINE_DIRECTION_OUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int lp873x_gpio_direction_input(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /* This device is output only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int lp873x_gpio_direction_output(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) unsigned int offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct lp873x_gpio *gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* Set the initial value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return regmap_update_bits(gpio->lp873->regmap, LP873X_REG_GPO_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) BIT(offset * BITS_PER_GPO),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) value ? BIT(offset * BITS_PER_GPO) : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static int lp873x_gpio_get(struct gpio_chip *chip, unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct lp873x_gpio *gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int ret, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) ret = regmap_read(gpio->lp873->regmap, LP873X_REG_GPO_CTRL, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return val & BIT(offset * BITS_PER_GPO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static void lp873x_gpio_set(struct gpio_chip *chip, unsigned int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct lp873x_gpio *gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) regmap_update_bits(gpio->lp873->regmap, LP873X_REG_GPO_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) BIT(offset * BITS_PER_GPO),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) value ? BIT(offset * BITS_PER_GPO) : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static int lp873x_gpio_request(struct gpio_chip *gc, unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct lp873x_gpio *gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) switch (offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) /* No MUX Set up Needed for GPO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /* Setup the CLKIN_PIN_SEL MUX to GPO2 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) ret = regmap_update_bits(gpio->lp873->regmap, LP873X_REG_CONFIG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) LP873X_CONFIG_CLKIN_PIN_SEL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int lp873x_gpio_set_config(struct gpio_chip *gc, unsigned offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned long config)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct lp873x_gpio *gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) switch (pinconf_to_config_param(config)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) case PIN_CONFIG_DRIVE_OPEN_DRAIN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return regmap_update_bits(gpio->lp873->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) LP873X_REG_GPO_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) BIT(offset * BITS_PER_GPO +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) LP873X_GPO_CTRL_OD),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) BIT(offset * BITS_PER_GPO +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) LP873X_GPO_CTRL_OD));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) case PIN_CONFIG_DRIVE_PUSH_PULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return regmap_update_bits(gpio->lp873->regmap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) LP873X_REG_GPO_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) BIT(offset * BITS_PER_GPO +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) LP873X_GPO_CTRL_OD), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return -ENOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static const struct gpio_chip template_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .label = "lp873x-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .request = lp873x_gpio_request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .get_direction = lp873x_gpio_get_direction,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .direction_input = lp873x_gpio_direction_input,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .direction_output = lp873x_gpio_direction_output,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .get = lp873x_gpio_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .set = lp873x_gpio_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .set_config = lp873x_gpio_set_config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .base = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .ngpio = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .can_sleep = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int lp873x_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) struct lp873x_gpio *gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (!gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) platform_set_drvdata(pdev, gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) gpio->lp873 = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) gpio->chip = template_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) gpio->chip.parent = gpio->lp873->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static const struct platform_device_id lp873x_gpio_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) { "lp873x-gpio", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) MODULE_DEVICE_TABLE(platform, lp873x_gpio_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static struct platform_driver lp873x_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) .name = "lp873x-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) .probe = lp873x_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) .id_table = lp873x_gpio_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) module_platform_driver(lp873x_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) MODULE_AUTHOR("Keerthy <j-keerthy@ti.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) MODULE_DESCRIPTION("LP873X GPIO driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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