// 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>");