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d9d87d90cc
The conversion of all GPIO drivers to using the .set_rv() and .set_multiple_rv() callbacks from struct gpio_chip (which - unlike their predecessors - return an integer and allow the controller drivers to indicate failures to users) is now complete and the legacy ones have been removed. Rename the new callbacks back to their original names in one sweeping change. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
148 lines
4 KiB
C
148 lines
4 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 int 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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int ret;
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if (val)
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ret = rc5t583_set_bits(parent, RC5T583_GPIO_IOOUT,
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BIT(offset));
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else
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ret = rc5t583_clear_bits(parent, RC5T583_GPIO_IOOUT,
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BIT(offset));
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return ret;
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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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ret = rc5t583_gpio_set(gc, offset, value);
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if (ret)
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return ret;
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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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