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![Andy Shevchenko](/assets/img/avatar_default.png)
When creating MFD platform devices the firmware node is left unset. This, in particular, prevents GPIO library to use it for different purposes. Propagate firmware node from the parent device and let GPIO library do the right thing. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
181 lines
4.8 KiB
C
181 lines
4.8 KiB
C
// 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 <gg@slimlogic.co.uk>
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* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
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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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device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
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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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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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