^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Maxim MAX96752F GPIO driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2022 Rockchip Electronics Co. Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mfd/max96752f.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct max96752f_gpio {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct gpio_chip gpio_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static int max96752f_gpio_direction_output(struct gpio_chip *gc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) unsigned int offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct max96752f_gpio *gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) regmap_update_bits(gpio->regmap, GPIO_A_REG(offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) GPIO_OUT_DIS | GPIO_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) FIELD_PREP(GPIO_OUT_DIS, 0) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) FIELD_PREP(GPIO_OUT, value));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static void max96752f_gpio_set(struct gpio_chip *gc, unsigned int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct max96752f_gpio *gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) regmap_update_bits(gpio->regmap, GPIO_A_REG(offset), GPIO_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) FIELD_PREP(GPIO_OUT, value));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int max96752f_gpio_get(struct gpio_chip *gc, unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct max96752f_gpio *gpio = gpiochip_get_data(gc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) unsigned int value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) regmap_read(gpio->regmap, GPIO_A_REG(offset), &value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return !!FIELD_GET(GPIO_OUT, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static int max96752f_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct max96752f_gpio *gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) gpio = devm_kzalloc(dev, sizeof(*gpio), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (!gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) gpio->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) platform_set_drvdata(pdev, gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) gpio->regmap = dev_get_regmap(dev->parent, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!gpio->regmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return dev_err_probe(dev, -ENODEV, "failed to get regmap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) gpio->gpio_chip.of_node = dev->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) gpio->gpio_chip.label = dev_name(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) gpio->gpio_chip.parent = dev->parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) gpio->gpio_chip.direction_output = max96752f_gpio_direction_output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) gpio->gpio_chip.set = max96752f_gpio_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) gpio->gpio_chip.get = max96752f_gpio_get;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) gpio->gpio_chip.ngpio = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) gpio->gpio_chip.can_sleep = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) gpio->gpio_chip.base = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = devm_gpiochip_add_data(dev, &gpio->gpio_chip, gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return dev_err_probe(dev, ret, "failed to add gpio chip\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static const struct of_device_id max96752f_gpio_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) { .name = "maxim,max96752f-gpio", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) MODULE_DEVICE_TABLE(of, max96752f_gpio_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static struct platform_driver max96752f_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .name = "max96752f-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .of_match_table = max96752f_gpio_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .probe = max96752f_gpio_probe,
^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) module_platform_driver(max96752f_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) MODULE_AUTHOR("Wyon Bi <bivvy.bi@rock-chips.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) MODULE_DESCRIPTION("Maxim MAX96752F GPIO driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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