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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2015-2023 Texas Instruments Incorporated - https://www.ti.com/ * Andrew Davis <afd@ti.com> * * Based on the TPS65912 driver */ #include <linux/gpio/driver.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/mfd/tps65086.h> struct tps65086_gpio { struct gpio_chip chip; struct tps65086 *tps; }; static int tps65086_gpio_get_direction(struct gpio_chip *chip, unsigned offset) { /* This device is output only */ return GPIO_LINE_DIRECTION_OUT; } static int tps65086_gpio_direction_input(struct gpio_chip *chip, unsigned offset) { /* This device is output only */ return -EINVAL; } static int tps65086_gpio_direction_output(struct gpio_chip *chip, unsigned offset, int value) { struct tps65086_gpio *gpio = gpiochip_get_data(chip); /* Set the initial value */ regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL, BIT(4 + offset), value ? BIT(4 + offset) : 0); return 0; } static int tps65086_gpio_get(struct gpio_chip *chip, unsigned offset) { struct tps65086_gpio *gpio = gpiochip_get_data(chip); int ret, val; ret = regmap_read(gpio->tps->regmap, TPS65086_GPOCTRL, &val); if (ret < 0) return ret; return val & BIT(4 + offset); } static void tps65086_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct tps65086_gpio *gpio = gpiochip_get_data(chip); regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL, BIT(4 + offset), value ? BIT(4 + offset) : 0); } static const struct gpio_chip template_chip = { .label = "tps65086-gpio", .owner = THIS_MODULE, .get_direction = tps65086_gpio_get_direction, .direction_input = tps65086_gpio_direction_input, .direction_output = tps65086_gpio_direction_output, .get = tps65086_gpio_get, .set = tps65086_gpio_set, .base = -1, .ngpio = 4, .can_sleep = true, }; static int tps65086_gpio_probe(struct platform_device *pdev) { struct tps65086_gpio *gpio; gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); if (!gpio) return -ENOMEM; gpio->tps = dev_get_drvdata(pdev->dev.parent); gpio->chip = template_chip; gpio->chip.parent = gpio->tps->dev; return devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio); } static const struct platform_device_id tps65086_gpio_id_table[] = { { "tps65086-gpio", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, tps65086_gpio_id_table); static struct platform_driver tps65086_gpio_driver = { .driver = { .name = "tps65086-gpio", }, .probe = tps65086_gpio_probe, .id_table = tps65086_gpio_id_table, }; module_platform_driver(tps65086_gpio_driver); MODULE_AUTHOR("Andrew Davis <afd@ti.com>"); MODULE_DESCRIPTION("TPS65086 GPIO driver"); MODULE_LICENSE("GPL v2"); |