140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Siemens SIMATIC IPC driver for GPIO based LEDs
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*
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* Copyright (c) Siemens AG, 2022
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*
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* Authors:
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* Henning Schild <henning.schild@siemens.com>
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*/
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#include <linux/gpio/machine.h>
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#include <linux/gpio/consumer.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/platform_data/x86/simatic-ipc-base.h>
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static struct gpiod_lookup_table *simatic_ipc_led_gpio_table;
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static struct gpiod_lookup_table simatic_ipc_led_gpio_table_127e = {
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.dev_id = "leds-gpio",
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.table = {
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GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 52, NULL, 0, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 53, NULL, 1, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 57, NULL, 2, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 58, NULL, 3, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 60, NULL, 4, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 51, NULL, 5, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 56, NULL, 6, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 59, NULL, 7, GPIO_ACTIVE_HIGH),
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},
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};
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static struct gpiod_lookup_table simatic_ipc_led_gpio_table_227g = {
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.dev_id = "leds-gpio",
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.table = {
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GPIO_LOOKUP_IDX("gpio-f7188x-2", 0, NULL, 0, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("gpio-f7188x-2", 1, NULL, 1, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("gpio-f7188x-2", 2, NULL, 2, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("gpio-f7188x-2", 3, NULL, 3, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("gpio-f7188x-2", 4, NULL, 4, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("gpio-f7188x-2", 5, NULL, 5, GPIO_ACTIVE_LOW),
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GPIO_LOOKUP_IDX("gpio-f7188x-3", 6, NULL, 6, GPIO_ACTIVE_HIGH),
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GPIO_LOOKUP_IDX("gpio-f7188x-3", 7, NULL, 7, GPIO_ACTIVE_HIGH),
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}
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};
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static const struct gpio_led simatic_ipc_gpio_leds[] = {
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{ .name = "red:" LED_FUNCTION_STATUS "-1" },
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{ .name = "green:" LED_FUNCTION_STATUS "-1" },
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{ .name = "red:" LED_FUNCTION_STATUS "-2" },
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{ .name = "green:" LED_FUNCTION_STATUS "-2" },
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{ .name = "red:" LED_FUNCTION_STATUS "-3" },
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{ .name = "green:" LED_FUNCTION_STATUS "-3" },
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};
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static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = {
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.num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds),
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.leds = simatic_ipc_gpio_leds,
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};
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static struct platform_device *simatic_leds_pdev;
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static int simatic_ipc_leds_gpio_remove(struct platform_device *pdev)
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{
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gpiod_remove_lookup_table(simatic_ipc_led_gpio_table);
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platform_device_unregister(simatic_leds_pdev);
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return 0;
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}
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static int simatic_ipc_leds_gpio_probe(struct platform_device *pdev)
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{
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const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
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struct gpio_desc *gpiod;
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int err;
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switch (plat->devmode) {
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case SIMATIC_IPC_DEVICE_127E:
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if (!IS_ENABLED(CONFIG_PINCTRL_BROXTON))
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return -ENODEV;
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simatic_ipc_led_gpio_table = &simatic_ipc_led_gpio_table_127e;
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break;
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case SIMATIC_IPC_DEVICE_227G:
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if (!IS_ENABLED(CONFIG_GPIO_F7188X))
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return -ENODEV;
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request_module("gpio-f7188x");
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simatic_ipc_led_gpio_table = &simatic_ipc_led_gpio_table_227g;
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break;
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default:
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return -ENODEV;
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}
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gpiod_add_lookup_table(simatic_ipc_led_gpio_table);
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simatic_leds_pdev = platform_device_register_resndata(NULL,
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"leds-gpio", PLATFORM_DEVID_NONE, NULL, 0,
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&simatic_ipc_gpio_leds_pdata,
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sizeof(simatic_ipc_gpio_leds_pdata));
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if (IS_ERR(simatic_leds_pdev)) {
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err = PTR_ERR(simatic_leds_pdev);
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goto out;
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}
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/* PM_BIOS_BOOT_N */
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gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 6, GPIOD_OUT_LOW);
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if (IS_ERR(gpiod)) {
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err = PTR_ERR(gpiod);
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goto out;
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}
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gpiod_put(gpiod);
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/* PM_WDT_OUT */
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gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 7, GPIOD_OUT_LOW);
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if (IS_ERR(gpiod)) {
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err = PTR_ERR(gpiod);
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goto out;
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}
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gpiod_put(gpiod);
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return 0;
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out:
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simatic_ipc_leds_gpio_remove(pdev);
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return err;
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}
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static struct platform_driver simatic_ipc_led_gpio_driver = {
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.probe = simatic_ipc_leds_gpio_probe,
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.remove = simatic_ipc_leds_gpio_remove,
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.driver = {
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.name = KBUILD_MODNAME,
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}
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};
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module_platform_driver(simatic_ipc_led_gpio_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:" KBUILD_MODNAME);
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MODULE_SOFTDEP("pre: platform:leds-gpio");
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MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");
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