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181 lines
4.8 KiB
181 lines
4.8 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* TI TPS6591x GPIO driver |
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* |
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* Copyright 2010 Texas Instruments Inc. |
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* |
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* Author: Graeme Gregory <[email protected]> |
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* Author: Jorge Eduardo Candelaria <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/errno.h> |
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#include <linux/gpio/driver.h> |
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#include <linux/i2c.h> |
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#include <linux/platform_device.h> |
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#include <linux/mfd/tps65910.h> |
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#include <linux/of_device.h> |
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struct tps65910_gpio { |
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struct gpio_chip gpio_chip; |
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struct tps65910 *tps65910; |
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}; |
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static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset) |
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{ |
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struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc); |
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struct tps65910 *tps65910 = tps65910_gpio->tps65910; |
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unsigned int val; |
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regmap_read(tps65910->regmap, TPS65910_GPIO0 + offset, &val); |
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if (val & GPIO_STS_MASK) |
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return 1; |
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return 0; |
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} |
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static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset, |
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int value) |
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{ |
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struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc); |
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struct tps65910 *tps65910 = tps65910_gpio->tps65910; |
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if (value) |
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regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset, |
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GPIO_SET_MASK); |
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else |
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regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset, |
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GPIO_SET_MASK); |
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} |
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static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset, |
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int value) |
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{ |
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struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc); |
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struct tps65910 *tps65910 = tps65910_gpio->tps65910; |
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/* Set the initial value */ |
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tps65910_gpio_set(gc, offset, value); |
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return regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset, |
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GPIO_CFG_MASK); |
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} |
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static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset) |
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{ |
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struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc); |
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struct tps65910 *tps65910 = tps65910_gpio->tps65910; |
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return regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset, |
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GPIO_CFG_MASK); |
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} |
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#ifdef CONFIG_OF |
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static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev, |
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struct tps65910 *tps65910, int chip_ngpio) |
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{ |
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struct tps65910_board *tps65910_board = tps65910->of_plat_data; |
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unsigned int prop_array[TPS6591X_MAX_NUM_GPIO]; |
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int ngpio = min(chip_ngpio, TPS6591X_MAX_NUM_GPIO); |
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int ret; |
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int idx; |
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tps65910_board->gpio_base = -1; |
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ret = of_property_read_u32_array(tps65910->dev->of_node, |
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"ti,en-gpio-sleep", prop_array, ngpio); |
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if (ret < 0) { |
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dev_dbg(dev, "ti,en-gpio-sleep not specified\n"); |
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return tps65910_board; |
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} |
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for (idx = 0; idx < ngpio; idx++) |
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tps65910_board->en_gpio_sleep[idx] = (prop_array[idx] != 0); |
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return tps65910_board; |
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} |
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#else |
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static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev, |
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struct tps65910 *tps65910, int chip_ngpio) |
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{ |
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return NULL; |
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} |
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#endif |
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static int tps65910_gpio_probe(struct platform_device *pdev) |
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{ |
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struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent); |
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struct tps65910_board *pdata = dev_get_platdata(tps65910->dev); |
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struct tps65910_gpio *tps65910_gpio; |
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int ret; |
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int i; |
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tps65910_gpio = devm_kzalloc(&pdev->dev, |
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sizeof(*tps65910_gpio), GFP_KERNEL); |
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if (!tps65910_gpio) |
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return -ENOMEM; |
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tps65910_gpio->tps65910 = tps65910; |
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tps65910_gpio->gpio_chip.owner = THIS_MODULE; |
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tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name; |
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switch (tps65910_chip_id(tps65910)) { |
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case TPS65910: |
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tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO; |
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break; |
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case TPS65911: |
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tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO; |
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break; |
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default: |
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return -EINVAL; |
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} |
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tps65910_gpio->gpio_chip.can_sleep = true; |
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tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input; |
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tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output; |
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tps65910_gpio->gpio_chip.set = tps65910_gpio_set; |
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tps65910_gpio->gpio_chip.get = tps65910_gpio_get; |
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tps65910_gpio->gpio_chip.parent = &pdev->dev; |
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#ifdef CONFIG_OF_GPIO |
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tps65910_gpio->gpio_chip.of_node = tps65910->dev->of_node; |
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#endif |
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if (pdata && pdata->gpio_base) |
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tps65910_gpio->gpio_chip.base = pdata->gpio_base; |
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else |
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tps65910_gpio->gpio_chip.base = -1; |
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if (!pdata && tps65910->dev->of_node) |
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pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910, |
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tps65910_gpio->gpio_chip.ngpio); |
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if (!pdata) |
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goto skip_init; |
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/* Configure sleep control for gpios if provided */ |
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for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) { |
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if (!pdata->en_gpio_sleep[i]) |
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continue; |
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ret = regmap_set_bits(tps65910->regmap, |
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TPS65910_GPIO0 + i, GPIO_SLEEP_MASK); |
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if (ret < 0) |
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dev_warn(tps65910->dev, |
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"GPIO Sleep setting failed with err %d\n", ret); |
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} |
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skip_init: |
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return devm_gpiochip_add_data(&pdev->dev, &tps65910_gpio->gpio_chip, |
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tps65910_gpio); |
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} |
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static struct platform_driver tps65910_gpio_driver = { |
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.driver.name = "tps65910-gpio", |
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.probe = tps65910_gpio_probe, |
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}; |
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static int __init tps65910_gpio_init(void) |
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{ |
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return platform_driver_register(&tps65910_gpio_driver); |
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} |
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subsys_initcall(tps65910_gpio_init);
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