mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
49a5bd880c
Turn the ath79 driver into a true driver supporting multiple instances. While at it also removed unneed includes and make use of the BIT() macro. Signed-off-by: Alban Bedel <albeu@free.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
206 lines
5.2 KiB
C
206 lines
5.2 KiB
C
/*
|
|
* Atheros AR71XX/AR724X/AR913X GPIO API support
|
|
*
|
|
* Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
|
|
* Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
|
|
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
|
|
*
|
|
* Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/gpio/driver.h>
|
|
#include <linux/platform_data/gpio-ath79.h>
|
|
#include <linux/of_device.h>
|
|
|
|
#include <asm/mach-ath79/ar71xx_regs.h>
|
|
|
|
struct ath79_gpio_ctrl {
|
|
struct gpio_chip chip;
|
|
void __iomem *base;
|
|
spinlock_t lock;
|
|
};
|
|
|
|
#define to_ath79_gpio_ctrl(c) container_of(c, struct ath79_gpio_ctrl, chip)
|
|
|
|
static void ath79_gpio_set_value(struct gpio_chip *chip,
|
|
unsigned gpio, int value)
|
|
{
|
|
struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
|
|
|
|
if (value)
|
|
__raw_writel(BIT(gpio), ctrl->base + AR71XX_GPIO_REG_SET);
|
|
else
|
|
__raw_writel(BIT(gpio), ctrl->base + AR71XX_GPIO_REG_CLEAR);
|
|
}
|
|
|
|
static int ath79_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
|
|
|
|
return (__raw_readl(ctrl->base + AR71XX_GPIO_REG_IN) >> gpio) & 1;
|
|
}
|
|
|
|
static int ath79_gpio_direction_input(struct gpio_chip *chip,
|
|
unsigned offset)
|
|
{
|
|
struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ctrl->lock, flags);
|
|
|
|
__raw_writel(
|
|
__raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) & ~BIT(offset),
|
|
ctrl->base + AR71XX_GPIO_REG_OE);
|
|
|
|
spin_unlock_irqrestore(&ctrl->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ath79_gpio_direction_output(struct gpio_chip *chip,
|
|
unsigned offset, int value)
|
|
{
|
|
struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ctrl->lock, flags);
|
|
|
|
if (value)
|
|
__raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_SET);
|
|
else
|
|
__raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_CLEAR);
|
|
|
|
__raw_writel(
|
|
__raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) | BIT(offset),
|
|
ctrl->base + AR71XX_GPIO_REG_OE);
|
|
|
|
spin_unlock_irqrestore(&ctrl->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ar934x_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
|
|
{
|
|
struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ctrl->lock, flags);
|
|
|
|
__raw_writel(
|
|
__raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) | BIT(offset),
|
|
ctrl->base + AR71XX_GPIO_REG_OE);
|
|
|
|
spin_unlock_irqrestore(&ctrl->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ar934x_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
|
|
int value)
|
|
{
|
|
struct ath79_gpio_ctrl *ctrl = to_ath79_gpio_ctrl(chip);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ctrl->lock, flags);
|
|
|
|
if (value)
|
|
__raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_SET);
|
|
else
|
|
__raw_writel(BIT(offset), ctrl->base + AR71XX_GPIO_REG_CLEAR);
|
|
|
|
__raw_writel(
|
|
__raw_readl(ctrl->base + AR71XX_GPIO_REG_OE) & BIT(offset),
|
|
ctrl->base + AR71XX_GPIO_REG_OE);
|
|
|
|
spin_unlock_irqrestore(&ctrl->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct gpio_chip ath79_gpio_chip = {
|
|
.label = "ath79",
|
|
.get = ath79_gpio_get_value,
|
|
.set = ath79_gpio_set_value,
|
|
.direction_input = ath79_gpio_direction_input,
|
|
.direction_output = ath79_gpio_direction_output,
|
|
.base = 0,
|
|
};
|
|
|
|
static const struct of_device_id ath79_gpio_of_match[] = {
|
|
{ .compatible = "qca,ar7100-gpio" },
|
|
{ .compatible = "qca,ar9340-gpio" },
|
|
{},
|
|
};
|
|
|
|
static int ath79_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
struct ath79_gpio_platform_data *pdata = pdev->dev.platform_data;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct ath79_gpio_ctrl *ctrl;
|
|
struct resource *res;
|
|
u32 ath79_gpio_count;
|
|
bool oe_inverted;
|
|
int err;
|
|
|
|
ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL);
|
|
if (!ctrl)
|
|
return -ENOMEM;
|
|
|
|
if (np) {
|
|
err = of_property_read_u32(np, "ngpios", &ath79_gpio_count);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "ngpios property is not valid\n");
|
|
return err;
|
|
}
|
|
if (ath79_gpio_count >= 32) {
|
|
dev_err(&pdev->dev, "ngpios must be less than 32\n");
|
|
return -EINVAL;
|
|
}
|
|
oe_inverted = of_device_is_compatible(np, "qca,ar9340-gpio");
|
|
} else if (pdata) {
|
|
ath79_gpio_count = pdata->ngpios;
|
|
oe_inverted = pdata->oe_inverted;
|
|
} else {
|
|
dev_err(&pdev->dev, "No DT node or platform data found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
ctrl->base = devm_ioremap_nocache(
|
|
&pdev->dev, res->start, resource_size(res));
|
|
if (!ctrl->base)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&ctrl->lock);
|
|
memcpy(&ctrl->chip, &ath79_gpio_chip, sizeof(ctrl->chip));
|
|
ctrl->chip.dev = &pdev->dev;
|
|
ctrl->chip.ngpio = ath79_gpio_count;
|
|
if (oe_inverted) {
|
|
ctrl->chip.direction_input = ar934x_gpio_direction_input;
|
|
ctrl->chip.direction_output = ar934x_gpio_direction_output;
|
|
}
|
|
|
|
err = gpiochip_add(&ctrl->chip);
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"cannot add AR71xx GPIO chip, error=%d", err);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver ath79_gpio_driver = {
|
|
.driver = {
|
|
.name = "ath79-gpio",
|
|
.of_match_table = ath79_gpio_of_match,
|
|
},
|
|
.probe = ath79_gpio_probe,
|
|
};
|
|
|
|
module_platform_driver(ath79_gpio_driver);
|