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2f5d6fe37b
In order to clearly describe the dependencies between the GPIO controller drivers and the users the driver is split up into a core, two drivers and a common header. Signed-off-by: Henning Schild <henning.schild@siemens.com> Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20230524124628.32295-4-henning.schild@siemens.com
105 lines
2.6 KiB
C
105 lines
2.6 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, 2023
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*
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* Author:
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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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#include "simatic-ipc-leds-gpio.h"
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static struct platform_device *simatic_leds_pdev;
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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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int simatic_ipc_leds_gpio_remove(struct platform_device *pdev,
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struct gpiod_lookup_table *table,
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struct gpiod_lookup_table *table_extra)
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{
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gpiod_remove_lookup_table(table);
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gpiod_remove_lookup_table(table_extra);
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platform_device_unregister(simatic_leds_pdev);
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return 0;
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}
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EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_remove);
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int simatic_ipc_leds_gpio_probe(struct platform_device *pdev,
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struct gpiod_lookup_table *table,
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struct gpiod_lookup_table *table_extra)
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{
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const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
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struct device *dev = &pdev->dev;
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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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case SIMATIC_IPC_DEVICE_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(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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table_extra->dev_id = dev_name(dev);
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gpiod_add_lookup_table(table_extra);
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/* PM_BIOS_BOOT_N */
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gpiod = gpiod_get_index(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(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, table, table_extra);
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return err;
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}
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EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_probe);
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MODULE_LICENSE("GPL v2");
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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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