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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ * Andrew F. 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; int ret; gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); if (!gpio) return -ENOMEM; platform_set_drvdata(pdev, gpio); gpio->tps = dev_get_drvdata(pdev->dev.parent); gpio->chip = template_chip; gpio->chip.parent = gpio->tps->dev; ret = gpiochip_add_data(&gpio->chip, gpio); if (ret < 0) { dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret); return ret; } return 0; } static int tps65086_gpio_remove(struct platform_device *pdev) { struct tps65086_gpio *gpio = platform_get_drvdata(pdev); gpiochip_remove(&gpio->chip); return 0; } 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, .remove = tps65086_gpio_remove, .id_table = tps65086_gpio_id_table, }; module_platform_driver(tps65086_gpio_driver); MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); MODULE_DESCRIPTION("TPS65086 GPIO driver"); MODULE_LICENSE("GPL v2"); |