mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Zheng Yongjun](/assets/img/avatar_default.png)
Replace a comma between expression statements by a semicolon. Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* sl28cpld GPIO driver
|
|
*
|
|
* Copyright 2020 Michael Walle <michael@walle.cc>
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/gpio/driver.h>
|
|
#include <linux/gpio/regmap.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
|
|
/* GPIO flavor */
|
|
#define GPIO_REG_DIR 0x00
|
|
#define GPIO_REG_OUT 0x01
|
|
#define GPIO_REG_IN 0x02
|
|
#define GPIO_REG_IE 0x03
|
|
#define GPIO_REG_IP 0x04
|
|
|
|
/* input-only flavor */
|
|
#define GPI_REG_IN 0x00
|
|
|
|
/* output-only flavor */
|
|
#define GPO_REG_OUT 0x00
|
|
|
|
enum sl28cpld_gpio_type {
|
|
SL28CPLD_GPIO = 1,
|
|
SL28CPLD_GPI,
|
|
SL28CPLD_GPO,
|
|
};
|
|
|
|
static const struct regmap_irq sl28cpld_gpio_irqs[] = {
|
|
REGMAP_IRQ_REG_LINE(0, 8),
|
|
REGMAP_IRQ_REG_LINE(1, 8),
|
|
REGMAP_IRQ_REG_LINE(2, 8),
|
|
REGMAP_IRQ_REG_LINE(3, 8),
|
|
REGMAP_IRQ_REG_LINE(4, 8),
|
|
REGMAP_IRQ_REG_LINE(5, 8),
|
|
REGMAP_IRQ_REG_LINE(6, 8),
|
|
REGMAP_IRQ_REG_LINE(7, 8),
|
|
};
|
|
|
|
static int sl28cpld_gpio_irq_init(struct platform_device *pdev,
|
|
unsigned int base,
|
|
struct gpio_regmap_config *config)
|
|
{
|
|
struct regmap_irq_chip_data *irq_data;
|
|
struct regmap_irq_chip *irq_chip;
|
|
struct device *dev = &pdev->dev;
|
|
int irq, ret;
|
|
|
|
if (!device_property_read_bool(dev, "interrupt-controller"))
|
|
return 0;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
irq_chip = devm_kzalloc(dev, sizeof(*irq_chip), GFP_KERNEL);
|
|
if (!irq_chip)
|
|
return -ENOMEM;
|
|
|
|
irq_chip->name = "sl28cpld-gpio-irq";
|
|
irq_chip->irqs = sl28cpld_gpio_irqs;
|
|
irq_chip->num_irqs = ARRAY_SIZE(sl28cpld_gpio_irqs);
|
|
irq_chip->num_regs = 1;
|
|
irq_chip->status_base = base + GPIO_REG_IP;
|
|
irq_chip->mask_base = base + GPIO_REG_IE;
|
|
irq_chip->mask_invert = true;
|
|
irq_chip->ack_base = base + GPIO_REG_IP;
|
|
|
|
ret = devm_regmap_add_irq_chip_fwnode(dev, dev_fwnode(dev),
|
|
config->regmap, irq,
|
|
IRQF_SHARED | IRQF_ONESHOT,
|
|
0, irq_chip, &irq_data);
|
|
if (ret)
|
|
return ret;
|
|
|
|
config->irq_domain = regmap_irq_get_domain(irq_data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sl28cpld_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
struct gpio_regmap_config config = {0};
|
|
enum sl28cpld_gpio_type type;
|
|
struct regmap *regmap;
|
|
u32 base;
|
|
int ret;
|
|
|
|
if (!pdev->dev.parent)
|
|
return -ENODEV;
|
|
|
|
type = (uintptr_t)device_get_match_data(&pdev->dev);
|
|
if (!type)
|
|
return -ENODEV;
|
|
|
|
ret = device_property_read_u32(&pdev->dev, "reg", &base);
|
|
if (ret)
|
|
return -EINVAL;
|
|
|
|
regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
|
if (!regmap)
|
|
return -ENODEV;
|
|
|
|
config.regmap = regmap;
|
|
config.parent = &pdev->dev;
|
|
config.ngpio = 8;
|
|
|
|
switch (type) {
|
|
case SL28CPLD_GPIO:
|
|
config.reg_dat_base = base + GPIO_REG_IN;
|
|
config.reg_set_base = base + GPIO_REG_OUT;
|
|
/* reg_dir_out_base might be zero */
|
|
config.reg_dir_out_base = GPIO_REGMAP_ADDR(base + GPIO_REG_DIR);
|
|
|
|
/* This type supports interrupts */
|
|
ret = sl28cpld_gpio_irq_init(pdev, base, &config);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case SL28CPLD_GPO:
|
|
config.reg_set_base = base + GPO_REG_OUT;
|
|
break;
|
|
case SL28CPLD_GPI:
|
|
config.reg_dat_base = base + GPI_REG_IN;
|
|
break;
|
|
default:
|
|
dev_err(&pdev->dev, "unknown type %d\n", type);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config));
|
|
}
|
|
|
|
static const struct of_device_id sl28cpld_gpio_of_match[] = {
|
|
{ .compatible = "kontron,sl28cpld-gpio", .data = (void *)SL28CPLD_GPIO },
|
|
{ .compatible = "kontron,sl28cpld-gpi", .data = (void *)SL28CPLD_GPI },
|
|
{ .compatible = "kontron,sl28cpld-gpo", .data = (void *)SL28CPLD_GPO },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sl28cpld_gpio_of_match);
|
|
|
|
static struct platform_driver sl28cpld_gpio_driver = {
|
|
.probe = sl28cpld_gpio_probe,
|
|
.driver = {
|
|
.name = "sl28cpld-gpio",
|
|
.of_match_table = sl28cpld_gpio_of_match,
|
|
},
|
|
};
|
|
module_platform_driver(sl28cpld_gpio_driver);
|
|
|
|
MODULE_DESCRIPTION("sl28cpld GPIO Driver");
|
|
MODULE_AUTHOR("Michael Walle <michael@walle.cc>");
|
|
MODULE_LICENSE("GPL");
|