9952f6918d
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 228 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
142 lines
4 KiB
C
142 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 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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platform_set_drvdata(pdev, rc5t583_gpio);
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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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