// 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: case SIMATIC_IPC_DEVICE_BX_59A: 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>");