diff options
Diffstat (limited to 'drivers/leds/simple/simatic-ipc-leds-gpio.c')
| -rw-r--r-- | drivers/leds/simple/simatic-ipc-leds-gpio.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/leds/simple/simatic-ipc-leds-gpio.c b/drivers/leds/simple/simatic-ipc-leds-gpio.c new file mode 100644 index 000000000000..4c9e663a90ba --- /dev/null +++ b/drivers/leds/simple/simatic-ipc-leds-gpio.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Siemens SIMATIC IPC driver for GPIO based LEDs + * + * Copyright (c) Siemens AG, 2022 + * + * Authors: + * 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> + +static struct gpiod_lookup_table simatic_ipc_led_gpio_table = { + .dev_id = "leds-gpio", + .table = { + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 51, NULL, 0, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 52, NULL, 1, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 53, NULL, 2, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 57, NULL, 3, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 58, NULL, 4, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 60, NULL, 5, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 56, NULL, 6, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 59, NULL, 7, GPIO_ACTIVE_HIGH), + }, +}; + +static const struct gpio_led simatic_ipc_gpio_leds[] = { + { .name = "green:" LED_FUNCTION_STATUS "-3" }, + { .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" }, +}; + +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, +}; + +static struct platform_device *simatic_leds_pdev; + +static int simatic_ipc_leds_gpio_remove(struct platform_device *pdev) +{ + gpiod_remove_lookup_table(&simatic_ipc_led_gpio_table); + platform_device_unregister(simatic_leds_pdev); + + return 0; +} + +static int simatic_ipc_leds_gpio_probe(struct platform_device *pdev) +{ + struct gpio_desc *gpiod; + int err; + + gpiod_add_lookup_table(&simatic_ipc_led_gpio_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; + } + + /* PM_BIOS_BOOT_N */ + gpiod = gpiod_get_index(&simatic_leds_pdev->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(&simatic_leds_pdev->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); + + return err; +} + +static struct platform_driver simatic_ipc_led_gpio_driver = { + .probe = simatic_ipc_leds_gpio_probe, + .remove = simatic_ipc_leds_gpio_remove, + .driver = { + .name = KBUILD_MODNAME, + } +}; +module_platform_driver(simatic_ipc_led_gpio_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" KBUILD_MODNAME); +MODULE_SOFTDEP("pre: platform:leds-gpio"); +MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>"); |