mirror of
https://github.com/torvalds/linux
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8e85d6af1b
This function call was found to be unnecessary as there is no equivalent platform_get_drvdata() call to access the private data of the driver. Also, the private data is defined in this driver, so there is no risk of it being accessed outside of this driver file. Reviewed-by: Alexandru Ardelean <alex@shruggie.ro> Signed-off-by: Andrei Coardos <aboutphysycs@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* GPIO driver for RICOH583 power management chip.
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*
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* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
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* Author: Laxman dewangan <ldewangan@nvidia.com>
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*
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* Based on code
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* Copyright (C) 2011 RICOH COMPANY,LTD
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <linux/gpio/driver.h>
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#include <linux/mfd/rc5t583.h>
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struct rc5t583_gpio {
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struct gpio_chip gpio_chip;
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struct rc5t583 *rc5t583;
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};
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static int rc5t583_gpio_get(struct gpio_chip *gc, unsigned int offset)
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{
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struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
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struct device *parent = rc5t583_gpio->rc5t583->dev;
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uint8_t val = 0;
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int ret;
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ret = rc5t583_read(parent, RC5T583_GPIO_MON_IOIN, &val);
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if (ret < 0)
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return ret;
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return !!(val & BIT(offset));
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}
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static void rc5t583_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
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{
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struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
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struct device *parent = rc5t583_gpio->rc5t583->dev;
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if (val)
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rc5t583_set_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
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else
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rc5t583_clear_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
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}
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static int rc5t583_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)
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{
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struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
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struct device *parent = rc5t583_gpio->rc5t583->dev;
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int ret;
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ret = rc5t583_clear_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
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if (ret < 0)
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return ret;
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/* Set pin to gpio mode */
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return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
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}
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static int rc5t583_gpio_dir_output(struct gpio_chip *gc, unsigned offset,
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int value)
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{
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struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
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struct device *parent = rc5t583_gpio->rc5t583->dev;
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int ret;
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rc5t583_gpio_set(gc, offset, value);
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ret = rc5t583_set_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
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if (ret < 0)
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return ret;
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/* Set pin to gpio mode */
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return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
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}
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static int rc5t583_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
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{
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struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
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if (offset < RC5T583_MAX_GPIO)
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return rc5t583_gpio->rc5t583->irq_base +
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RC5T583_IRQ_GPIO0 + offset;
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return -EINVAL;
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}
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static void rc5t583_gpio_free(struct gpio_chip *gc, unsigned offset)
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{
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struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
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struct device *parent = rc5t583_gpio->rc5t583->dev;
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rc5t583_set_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
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}
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static int rc5t583_gpio_probe(struct platform_device *pdev)
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{
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struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
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struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
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struct rc5t583_gpio *rc5t583_gpio;
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rc5t583_gpio = devm_kzalloc(&pdev->dev, sizeof(*rc5t583_gpio),
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GFP_KERNEL);
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if (!rc5t583_gpio)
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return -ENOMEM;
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rc5t583_gpio->gpio_chip.label = "gpio-rc5t583",
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rc5t583_gpio->gpio_chip.owner = THIS_MODULE,
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rc5t583_gpio->gpio_chip.free = rc5t583_gpio_free,
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rc5t583_gpio->gpio_chip.direction_input = rc5t583_gpio_dir_input,
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rc5t583_gpio->gpio_chip.direction_output = rc5t583_gpio_dir_output,
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rc5t583_gpio->gpio_chip.set = rc5t583_gpio_set,
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rc5t583_gpio->gpio_chip.get = rc5t583_gpio_get,
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rc5t583_gpio->gpio_chip.to_irq = rc5t583_gpio_to_irq,
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rc5t583_gpio->gpio_chip.ngpio = RC5T583_MAX_GPIO,
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rc5t583_gpio->gpio_chip.can_sleep = true,
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rc5t583_gpio->gpio_chip.parent = &pdev->dev;
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rc5t583_gpio->gpio_chip.base = -1;
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rc5t583_gpio->rc5t583 = rc5t583;
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if (pdata && pdata->gpio_base)
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rc5t583_gpio->gpio_chip.base = pdata->gpio_base;
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return devm_gpiochip_add_data(&pdev->dev, &rc5t583_gpio->gpio_chip,
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rc5t583_gpio);
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}
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static struct platform_driver rc5t583_gpio_driver = {
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.driver = {
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.name = "rc5t583-gpio",
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},
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.probe = rc5t583_gpio_probe,
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};
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static int __init rc5t583_gpio_init(void)
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{
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return platform_driver_register(&rc5t583_gpio_driver);
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}
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subsys_initcall(rc5t583_gpio_init);
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