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// 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,
};
void 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);
}
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:
case SIMATIC_IPC_DEVICE_BX_21A:
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;
}
if (!table_extra)
return 0;
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>");
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