1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Siemens SIMATIC IPC driver for GPIO based LEDs 4 * 5 * Copyright (c) Siemens AG, 2023 6 * 7 * Author: 8 * Henning Schild <henning.schild@siemens.com> 9 */ 10 11 #include <linux/gpio/machine.h> 12 #include <linux/gpio/consumer.h> 13 #include <linux/leds.h> 14 #include <linux/module.h> 15 #include <linux/platform_device.h> 16 #include <linux/platform_data/x86/simatic-ipc-base.h> 17 18 #include "simatic-ipc-leds-gpio.h" 19 20 static struct platform_device *simatic_leds_pdev; 21 22 static const struct gpio_led simatic_ipc_gpio_leds[] = { 23 { .name = "red:" LED_FUNCTION_STATUS "-1" }, 24 { .name = "green:" LED_FUNCTION_STATUS "-1" }, 25 { .name = "red:" LED_FUNCTION_STATUS "-2" }, 26 { .name = "green:" LED_FUNCTION_STATUS "-2" }, 27 { .name = "red:" LED_FUNCTION_STATUS "-3" }, 28 { .name = "green:" LED_FUNCTION_STATUS "-3" }, 29 }; 30 31 static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = { 32 .num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds), 33 .leds = simatic_ipc_gpio_leds, 34 }; 35 36 int simatic_ipc_leds_gpio_remove(struct platform_device *pdev, 37 struct gpiod_lookup_table *table, 38 struct gpiod_lookup_table *table_extra) 39 { 40 gpiod_remove_lookup_table(table); 41 gpiod_remove_lookup_table(table_extra); 42 platform_device_unregister(simatic_leds_pdev); 43 44 return 0; 45 } 46 EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_remove); 47 48 int simatic_ipc_leds_gpio_probe(struct platform_device *pdev, 49 struct gpiod_lookup_table *table, 50 struct gpiod_lookup_table *table_extra) 51 { 52 const struct simatic_ipc_platform *plat = pdev->dev.platform_data; 53 struct device *dev = &pdev->dev; 54 struct gpio_desc *gpiod; 55 int err; 56 57 switch (plat->devmode) { 58 case SIMATIC_IPC_DEVICE_127E: 59 case SIMATIC_IPC_DEVICE_227G: 60 case SIMATIC_IPC_DEVICE_BX_21A: 61 break; 62 default: 63 return -ENODEV; 64 } 65 66 gpiod_add_lookup_table(table); 67 simatic_leds_pdev = platform_device_register_resndata(NULL, 68 "leds-gpio", PLATFORM_DEVID_NONE, NULL, 0, 69 &simatic_ipc_gpio_leds_pdata, 70 sizeof(simatic_ipc_gpio_leds_pdata)); 71 if (IS_ERR(simatic_leds_pdev)) { 72 err = PTR_ERR(simatic_leds_pdev); 73 goto out; 74 } 75 76 if (!table_extra) 77 return 0; 78 79 table_extra->dev_id = dev_name(dev); 80 gpiod_add_lookup_table(table_extra); 81 82 /* PM_BIOS_BOOT_N */ 83 gpiod = gpiod_get_index(dev, NULL, 6, GPIOD_OUT_LOW); 84 if (IS_ERR(gpiod)) { 85 err = PTR_ERR(gpiod); 86 goto out; 87 } 88 gpiod_put(gpiod); 89 90 /* PM_WDT_OUT */ 91 gpiod = gpiod_get_index(dev, NULL, 7, GPIOD_OUT_LOW); 92 if (IS_ERR(gpiod)) { 93 err = PTR_ERR(gpiod); 94 goto out; 95 } 96 gpiod_put(gpiod); 97 98 return 0; 99 out: 100 simatic_ipc_leds_gpio_remove(pdev, table, table_extra); 101 102 return err; 103 } 104 EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_probe); 105 106 MODULE_LICENSE("GPL v2"); 107 MODULE_SOFTDEP("pre: platform:leds-gpio"); 108 MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>"); 109