mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
141 lines
4.0 KiB
141 lines
4.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* GPIO driver for RICOH583 power management chip. |
|
* |
|
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. |
|
* Author: Laxman dewangan <[email protected]> |
|
* |
|
* Based on code |
|
* Copyright (C) 2011 RICOH COMPANY,LTD |
|
*/ |
|
#include <linux/init.h> |
|
#include <linux/kernel.h> |
|
#include <linux/slab.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/device.h> |
|
#include <linux/gpio/driver.h> |
|
#include <linux/mfd/rc5t583.h> |
|
|
|
struct rc5t583_gpio { |
|
struct gpio_chip gpio_chip; |
|
struct rc5t583 *rc5t583; |
|
}; |
|
|
|
static int rc5t583_gpio_get(struct gpio_chip *gc, unsigned int offset) |
|
{ |
|
struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc); |
|
struct device *parent = rc5t583_gpio->rc5t583->dev; |
|
uint8_t val = 0; |
|
int ret; |
|
|
|
ret = rc5t583_read(parent, RC5T583_GPIO_MON_IOIN, &val); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return !!(val & BIT(offset)); |
|
} |
|
|
|
static void rc5t583_gpio_set(struct gpio_chip *gc, unsigned int offset, int val) |
|
{ |
|
struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc); |
|
struct device *parent = rc5t583_gpio->rc5t583->dev; |
|
if (val) |
|
rc5t583_set_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset)); |
|
else |
|
rc5t583_clear_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset)); |
|
} |
|
|
|
static int rc5t583_gpio_dir_input(struct gpio_chip *gc, unsigned int offset) |
|
{ |
|
struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc); |
|
struct device *parent = rc5t583_gpio->rc5t583->dev; |
|
int ret; |
|
|
|
ret = rc5t583_clear_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset)); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* Set pin to gpio mode */ |
|
return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset)); |
|
} |
|
|
|
static int rc5t583_gpio_dir_output(struct gpio_chip *gc, unsigned offset, |
|
int value) |
|
{ |
|
struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc); |
|
struct device *parent = rc5t583_gpio->rc5t583->dev; |
|
int ret; |
|
|
|
rc5t583_gpio_set(gc, offset, value); |
|
ret = rc5t583_set_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset)); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* Set pin to gpio mode */ |
|
return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset)); |
|
} |
|
|
|
static int rc5t583_gpio_to_irq(struct gpio_chip *gc, unsigned offset) |
|
{ |
|
struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc); |
|
|
|
if (offset < RC5T583_MAX_GPIO) |
|
return rc5t583_gpio->rc5t583->irq_base + |
|
RC5T583_IRQ_GPIO0 + offset; |
|
return -EINVAL; |
|
} |
|
|
|
static void rc5t583_gpio_free(struct gpio_chip *gc, unsigned offset) |
|
{ |
|
struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc); |
|
struct device *parent = rc5t583_gpio->rc5t583->dev; |
|
|
|
rc5t583_set_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset)); |
|
} |
|
|
|
static int rc5t583_gpio_probe(struct platform_device *pdev) |
|
{ |
|
struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent); |
|
struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev); |
|
struct rc5t583_gpio *rc5t583_gpio; |
|
|
|
rc5t583_gpio = devm_kzalloc(&pdev->dev, sizeof(*rc5t583_gpio), |
|
GFP_KERNEL); |
|
if (!rc5t583_gpio) |
|
return -ENOMEM; |
|
|
|
rc5t583_gpio->gpio_chip.label = "gpio-rc5t583", |
|
rc5t583_gpio->gpio_chip.owner = THIS_MODULE, |
|
rc5t583_gpio->gpio_chip.free = rc5t583_gpio_free, |
|
rc5t583_gpio->gpio_chip.direction_input = rc5t583_gpio_dir_input, |
|
rc5t583_gpio->gpio_chip.direction_output = rc5t583_gpio_dir_output, |
|
rc5t583_gpio->gpio_chip.set = rc5t583_gpio_set, |
|
rc5t583_gpio->gpio_chip.get = rc5t583_gpio_get, |
|
rc5t583_gpio->gpio_chip.to_irq = rc5t583_gpio_to_irq, |
|
rc5t583_gpio->gpio_chip.ngpio = RC5T583_MAX_GPIO, |
|
rc5t583_gpio->gpio_chip.can_sleep = true, |
|
rc5t583_gpio->gpio_chip.parent = &pdev->dev; |
|
rc5t583_gpio->gpio_chip.base = -1; |
|
rc5t583_gpio->rc5t583 = rc5t583; |
|
|
|
if (pdata && pdata->gpio_base) |
|
rc5t583_gpio->gpio_chip.base = pdata->gpio_base; |
|
|
|
platform_set_drvdata(pdev, rc5t583_gpio); |
|
|
|
return devm_gpiochip_add_data(&pdev->dev, &rc5t583_gpio->gpio_chip, |
|
rc5t583_gpio); |
|
} |
|
|
|
static struct platform_driver rc5t583_gpio_driver = { |
|
.driver = { |
|
.name = "rc5t583-gpio", |
|
}, |
|
.probe = rc5t583_gpio_probe, |
|
}; |
|
|
|
static int __init rc5t583_gpio_init(void) |
|
{ |
|
return platform_driver_register(&rc5t583_gpio_driver); |
|
} |
|
subsys_initcall(rc5t583_gpio_init);
|
|
|