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 struct simatic_ipc_led_tables { 21 struct gpiod_lookup_table *led_lookup_table; 22 struct gpiod_lookup_table *led_lookup_table_extra; 23 }; 24 25 static struct gpiod_lookup_table simatic_ipc_led_gpio_table_227g = { 26 .dev_id = "leds-gpio", 27 .table = { 28 GPIO_LOOKUP_IDX("gpio-f7188x-2", 0, NULL, 0, GPIO_ACTIVE_LOW), 29 GPIO_LOOKUP_IDX("gpio-f7188x-2", 1, NULL, 1, GPIO_ACTIVE_LOW), 30 GPIO_LOOKUP_IDX("gpio-f7188x-2", 2, NULL, 2, GPIO_ACTIVE_LOW), 31 GPIO_LOOKUP_IDX("gpio-f7188x-2", 3, NULL, 3, GPIO_ACTIVE_LOW), 32 GPIO_LOOKUP_IDX("gpio-f7188x-2", 4, NULL, 4, GPIO_ACTIVE_LOW), 33 GPIO_LOOKUP_IDX("gpio-f7188x-2", 5, NULL, 5, GPIO_ACTIVE_LOW), 34 {} /* Terminating entry */ 35 }, 36 }; 37 38 static struct gpiod_lookup_table simatic_ipc_led_gpio_table_extra_227g = { 39 .dev_id = NULL, /* Filled during initialization */ 40 .table = { 41 GPIO_LOOKUP_IDX("gpio-f7188x-3", 6, NULL, 6, GPIO_ACTIVE_HIGH), 42 GPIO_LOOKUP_IDX("gpio-f7188x-3", 7, NULL, 7, GPIO_ACTIVE_HIGH), 43 {} /* Terminating entry */ 44 }, 45 }; 46 47 static struct gpiod_lookup_table simatic_ipc_led_gpio_table_bx_59a = { 48 .dev_id = "leds-gpio", 49 .table = { 50 GPIO_LOOKUP_IDX("gpio-f7188x-2", 0, NULL, 0, GPIO_ACTIVE_LOW), 51 GPIO_LOOKUP_IDX("gpio-f7188x-2", 3, NULL, 1, GPIO_ACTIVE_LOW), 52 GPIO_LOOKUP_IDX("gpio-f7188x-5", 3, NULL, 2, GPIO_ACTIVE_LOW), 53 GPIO_LOOKUP_IDX("gpio-f7188x-5", 2, NULL, 3, GPIO_ACTIVE_LOW), 54 GPIO_LOOKUP_IDX("gpio-f7188x-7", 7, NULL, 4, GPIO_ACTIVE_LOW), 55 GPIO_LOOKUP_IDX("gpio-f7188x-7", 4, NULL, 5, GPIO_ACTIVE_LOW), 56 {} /* Terminating entry */ 57 } 58 }; 59 60 static int simatic_ipc_leds_gpio_f7188x_probe(struct platform_device *pdev) 61 { 62 const struct simatic_ipc_platform *plat = dev_get_platdata(&pdev->dev); 63 struct simatic_ipc_led_tables *led_tables; 64 65 led_tables = devm_kzalloc(&pdev->dev, sizeof(*led_tables), GFP_KERNEL); 66 if (!led_tables) 67 return -ENOMEM; 68 69 switch (plat->devmode) { 70 case SIMATIC_IPC_DEVICE_227G: 71 led_tables->led_lookup_table = &simatic_ipc_led_gpio_table_227g; 72 led_tables->led_lookup_table_extra = &simatic_ipc_led_gpio_table_extra_227g; 73 break; 74 case SIMATIC_IPC_DEVICE_BX_59A: 75 led_tables->led_lookup_table = &simatic_ipc_led_gpio_table_bx_59a; 76 break; 77 default: 78 return -ENODEV; 79 } 80 81 platform_set_drvdata(pdev, led_tables); 82 return simatic_ipc_leds_gpio_probe(pdev, led_tables->led_lookup_table, 83 led_tables->led_lookup_table_extra); 84 } 85 86 static void simatic_ipc_leds_gpio_f7188x_remove(struct platform_device *pdev) 87 { 88 struct simatic_ipc_led_tables *led_tables = platform_get_drvdata(pdev); 89 90 simatic_ipc_leds_gpio_remove(pdev, led_tables->led_lookup_table, 91 led_tables->led_lookup_table_extra); 92 } 93 94 static struct platform_driver simatic_ipc_led_gpio_driver = { 95 .probe = simatic_ipc_leds_gpio_f7188x_probe, 96 .remove = simatic_ipc_leds_gpio_f7188x_remove, 97 .driver = { 98 .name = KBUILD_MODNAME, 99 }, 100 }; 101 module_platform_driver(simatic_ipc_led_gpio_driver); 102 103 MODULE_DESCRIPTION("LED driver for Siemens Simatic IPCs based on Nuvoton GPIO"); 104 MODULE_LICENSE("GPL v2"); 105 MODULE_ALIAS("platform:" KBUILD_MODNAME); 106 MODULE_SOFTDEP("pre: simatic-ipc-leds-gpio-core gpio_f7188x"); 107 MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>"); 108