mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 16:24:13 +08:00
2f5d6fe37b
In order to clearly describe the dependencies between the GPIO controller drivers and the users the driver is split up into a core, two drivers and a common header. Signed-off-by: Henning Schild <henning.schild@siemens.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20230524124628.32295-4-henning.schild@siemens.com
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Siemens SIMATIC IPC driver for GPIO based LEDs
|
|
*
|
|
* Copyright (c) Siemens AG, 2023
|
|
*
|
|
* Author:
|
|
* Henning Schild <henning.schild@siemens.com>
|
|
*/
|
|
|
|
#include <linux/gpio/machine.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/platform_data/x86/simatic-ipc-base.h>
|
|
|
|
#include "simatic-ipc-leds-gpio.h"
|
|
|
|
static struct platform_device *simatic_leds_pdev;
|
|
|
|
static const struct gpio_led simatic_ipc_gpio_leds[] = {
|
|
{ .name = "red:" LED_FUNCTION_STATUS "-1" },
|
|
{ .name = "green:" LED_FUNCTION_STATUS "-1" },
|
|
{ .name = "red:" LED_FUNCTION_STATUS "-2" },
|
|
{ .name = "green:" LED_FUNCTION_STATUS "-2" },
|
|
{ .name = "red:" LED_FUNCTION_STATUS "-3" },
|
|
{ .name = "green:" LED_FUNCTION_STATUS "-3" },
|
|
};
|
|
|
|
static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = {
|
|
.num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds),
|
|
.leds = simatic_ipc_gpio_leds,
|
|
};
|
|
|
|
int simatic_ipc_leds_gpio_remove(struct platform_device *pdev,
|
|
struct gpiod_lookup_table *table,
|
|
struct gpiod_lookup_table *table_extra)
|
|
{
|
|
gpiod_remove_lookup_table(table);
|
|
gpiod_remove_lookup_table(table_extra);
|
|
platform_device_unregister(simatic_leds_pdev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_remove);
|
|
|
|
int simatic_ipc_leds_gpio_probe(struct platform_device *pdev,
|
|
struct gpiod_lookup_table *table,
|
|
struct gpiod_lookup_table *table_extra)
|
|
{
|
|
const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
|
|
struct device *dev = &pdev->dev;
|
|
struct gpio_desc *gpiod;
|
|
int err;
|
|
|
|
switch (plat->devmode) {
|
|
case SIMATIC_IPC_DEVICE_127E:
|
|
case SIMATIC_IPC_DEVICE_227G:
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
gpiod_add_lookup_table(table);
|
|
simatic_leds_pdev = platform_device_register_resndata(NULL,
|
|
"leds-gpio", PLATFORM_DEVID_NONE, NULL, 0,
|
|
&simatic_ipc_gpio_leds_pdata,
|
|
sizeof(simatic_ipc_gpio_leds_pdata));
|
|
if (IS_ERR(simatic_leds_pdev)) {
|
|
err = PTR_ERR(simatic_leds_pdev);
|
|
goto out;
|
|
}
|
|
|
|
table_extra->dev_id = dev_name(dev);
|
|
gpiod_add_lookup_table(table_extra);
|
|
|
|
/* PM_BIOS_BOOT_N */
|
|
gpiod = gpiod_get_index(dev, NULL, 6, GPIOD_OUT_LOW);
|
|
if (IS_ERR(gpiod)) {
|
|
err = PTR_ERR(gpiod);
|
|
goto out;
|
|
}
|
|
gpiod_put(gpiod);
|
|
|
|
/* PM_WDT_OUT */
|
|
gpiod = gpiod_get_index(dev, NULL, 7, GPIOD_OUT_LOW);
|
|
if (IS_ERR(gpiod)) {
|
|
err = PTR_ERR(gpiod);
|
|
goto out;
|
|
}
|
|
gpiod_put(gpiod);
|
|
|
|
return 0;
|
|
out:
|
|
simatic_ipc_leds_gpio_remove(pdev, table, table_extra);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_probe);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_SOFTDEP("pre: platform:leds-gpio");
|
|
MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");
|