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effe3781b6
The platform_set_drvdata() call is only useful if we need to retrieve back the private information. Since the driver doesn't do that, it's not useful to have it. If this is removed, we can also just do a direct return on devm_gpiochip_add_data(). We don't need to print that this call failed as there are other ways to log/see this during probe. Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* GPIO driver for TI TPS65912x PMICs
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*
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* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
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* Andrew F. Davis <afd@ti.com>
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*
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* Based on the Arizona GPIO driver and the previous TPS65912 driver by
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* Margarita Olaya Cabrera <magi@slimlogic.co.uk>
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*/
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#include <linux/gpio/driver.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/tps65912.h>
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struct tps65912_gpio {
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struct gpio_chip gpio_chip;
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struct tps65912 *tps;
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};
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static int tps65912_gpio_get_direction(struct gpio_chip *gc,
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unsigned offset)
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{
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struct tps65912_gpio *gpio = gpiochip_get_data(gc);
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int ret, val;
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ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
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if (ret)
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return ret;
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if (val & GPIO_CFG_MASK)
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return GPIO_LINE_DIRECTION_OUT;
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else
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return GPIO_LINE_DIRECTION_IN;
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}
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static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
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{
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struct tps65912_gpio *gpio = gpiochip_get_data(gc);
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return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
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GPIO_CFG_MASK, 0);
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}
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static int tps65912_gpio_direction_output(struct gpio_chip *gc,
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unsigned offset, int value)
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{
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struct tps65912_gpio *gpio = gpiochip_get_data(gc);
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/* Set the initial value */
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regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
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GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
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return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
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GPIO_CFG_MASK, GPIO_CFG_MASK);
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}
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static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
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{
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struct tps65912_gpio *gpio = gpiochip_get_data(gc);
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int ret, val;
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ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
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if (ret)
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return ret;
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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 tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
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int value)
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{
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struct tps65912_gpio *gpio = gpiochip_get_data(gc);
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regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
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GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
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}
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static const struct gpio_chip template_chip = {
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.label = "tps65912-gpio",
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.owner = THIS_MODULE,
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.get_direction = tps65912_gpio_get_direction,
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.direction_input = tps65912_gpio_direction_input,
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.direction_output = tps65912_gpio_direction_output,
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.get = tps65912_gpio_get,
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.set = tps65912_gpio_set,
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.base = -1,
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.ngpio = 5,
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.can_sleep = true,
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};
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static int tps65912_gpio_probe(struct platform_device *pdev)
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{
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struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
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struct tps65912_gpio *gpio;
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gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
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if (!gpio)
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return -ENOMEM;
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gpio->tps = dev_get_drvdata(pdev->dev.parent);
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gpio->gpio_chip = template_chip;
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gpio->gpio_chip.parent = tps->dev;
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return devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip, gpio);
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}
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static const struct platform_device_id tps65912_gpio_id_table[] = {
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{ "tps65912-gpio", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table);
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static struct platform_driver tps65912_gpio_driver = {
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.driver = {
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.name = "tps65912-gpio",
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},
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.probe = tps65912_gpio_probe,
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.id_table = tps65912_gpio_id_table,
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};
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module_platform_driver(tps65912_gpio_driver);
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MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
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MODULE_DESCRIPTION("TPS65912 GPIO driver");
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MODULE_LICENSE("GPL v2");
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