xref: /linux/drivers/leds/simatic/simatic-ipc-leds-gpio-core.c (revision 4f9786035f9e519db41375818e1d0b5f20da2f10) 
1*835a0c10SLee Jones // SPDX-License-Identifier: GPL-2.0
2*835a0c10SLee Jones /*
3*835a0c10SLee Jones  * Siemens SIMATIC IPC driver for GPIO based LEDs
4*835a0c10SLee Jones  *
5*835a0c10SLee Jones  * Copyright (c) Siemens AG, 2023
6*835a0c10SLee Jones  *
7*835a0c10SLee Jones  * Author:
8*835a0c10SLee Jones  *  Henning Schild <henning.schild@siemens.com>
9*835a0c10SLee Jones  */
10*835a0c10SLee Jones 
11*835a0c10SLee Jones #include <linux/gpio/machine.h>
12*835a0c10SLee Jones #include <linux/gpio/consumer.h>
13*835a0c10SLee Jones #include <linux/leds.h>
14*835a0c10SLee Jones #include <linux/module.h>
15*835a0c10SLee Jones #include <linux/platform_device.h>
16*835a0c10SLee Jones #include <linux/platform_data/x86/simatic-ipc-base.h>
17*835a0c10SLee Jones 
18*835a0c10SLee Jones #include "simatic-ipc-leds-gpio.h"
19*835a0c10SLee Jones 
20*835a0c10SLee Jones static struct platform_device *simatic_leds_pdev;
21*835a0c10SLee Jones 
22*835a0c10SLee Jones static const struct gpio_led simatic_ipc_gpio_leds[] = {
23*835a0c10SLee Jones 	{ .name = "red:" LED_FUNCTION_STATUS "-1" },
24*835a0c10SLee Jones 	{ .name = "green:" LED_FUNCTION_STATUS "-1" },
25*835a0c10SLee Jones 	{ .name = "red:" LED_FUNCTION_STATUS "-2" },
26*835a0c10SLee Jones 	{ .name = "green:" LED_FUNCTION_STATUS "-2" },
27*835a0c10SLee Jones 	{ .name = "red:" LED_FUNCTION_STATUS "-3" },
28*835a0c10SLee Jones 	{ .name = "green:" LED_FUNCTION_STATUS "-3" },
29*835a0c10SLee Jones };
30*835a0c10SLee Jones 
31*835a0c10SLee Jones static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = {
32*835a0c10SLee Jones 	.num_leds	= ARRAY_SIZE(simatic_ipc_gpio_leds),
33*835a0c10SLee Jones 	.leds		= simatic_ipc_gpio_leds,
34*835a0c10SLee Jones };
35*835a0c10SLee Jones 
36*835a0c10SLee Jones void simatic_ipc_leds_gpio_remove(struct platform_device *pdev,
37*835a0c10SLee Jones 				 struct gpiod_lookup_table *table,
38*835a0c10SLee Jones 				 struct gpiod_lookup_table *table_extra)
39*835a0c10SLee Jones {
40*835a0c10SLee Jones 	gpiod_remove_lookup_table(table);
41*835a0c10SLee Jones 	gpiod_remove_lookup_table(table_extra);
42*835a0c10SLee Jones 	platform_device_unregister(simatic_leds_pdev);
43*835a0c10SLee Jones }
44*835a0c10SLee Jones EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_remove);
45*835a0c10SLee Jones 
46*835a0c10SLee Jones int simatic_ipc_leds_gpio_probe(struct platform_device *pdev,
47*835a0c10SLee Jones 				struct gpiod_lookup_table *table,
48*835a0c10SLee Jones 				struct gpiod_lookup_table *table_extra)
49*835a0c10SLee Jones {
50*835a0c10SLee Jones 	const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
51*835a0c10SLee Jones 	struct device *dev = &pdev->dev;
52*835a0c10SLee Jones 	struct gpio_desc *gpiod;
53*835a0c10SLee Jones 	int err;
54*835a0c10SLee Jones 
55*835a0c10SLee Jones 	switch (plat->devmode) {
56*835a0c10SLee Jones 	case SIMATIC_IPC_DEVICE_127E:
57*835a0c10SLee Jones 	case SIMATIC_IPC_DEVICE_227G:
58*835a0c10SLee Jones 	case SIMATIC_IPC_DEVICE_BX_21A:
59*835a0c10SLee Jones 	case SIMATIC_IPC_DEVICE_BX_59A:
60*835a0c10SLee Jones 		break;
61*835a0c10SLee Jones 	default:
62*835a0c10SLee Jones 		return -ENODEV;
63*835a0c10SLee Jones 	}
64*835a0c10SLee Jones 
65*835a0c10SLee Jones 	gpiod_add_lookup_table(table);
66*835a0c10SLee Jones 	simatic_leds_pdev = platform_device_register_resndata(NULL,
67*835a0c10SLee Jones 		"leds-gpio", PLATFORM_DEVID_NONE, NULL, 0,
68*835a0c10SLee Jones 		&simatic_ipc_gpio_leds_pdata,
69*835a0c10SLee Jones 		sizeof(simatic_ipc_gpio_leds_pdata));
70*835a0c10SLee Jones 	if (IS_ERR(simatic_leds_pdev)) {
71*835a0c10SLee Jones 		err = PTR_ERR(simatic_leds_pdev);
72*835a0c10SLee Jones 		goto out;
73*835a0c10SLee Jones 	}
74*835a0c10SLee Jones 
75*835a0c10SLee Jones 	if (!table_extra)
76*835a0c10SLee Jones 		return 0;
77*835a0c10SLee Jones 
78*835a0c10SLee Jones 	table_extra->dev_id = dev_name(dev);
79*835a0c10SLee Jones 	gpiod_add_lookup_table(table_extra);
80*835a0c10SLee Jones 
81*835a0c10SLee Jones 	/* PM_BIOS_BOOT_N */
82*835a0c10SLee Jones 	gpiod = gpiod_get_index(dev, NULL, 6, GPIOD_OUT_LOW);
83*835a0c10SLee Jones 	if (IS_ERR(gpiod)) {
84*835a0c10SLee Jones 		err = PTR_ERR(gpiod);
85*835a0c10SLee Jones 		goto out;
86*835a0c10SLee Jones 	}
87*835a0c10SLee Jones 	gpiod_put(gpiod);
88*835a0c10SLee Jones 
89*835a0c10SLee Jones 	/* PM_WDT_OUT */
90*835a0c10SLee Jones 	gpiod = gpiod_get_index(dev, NULL, 7, GPIOD_OUT_LOW);
91*835a0c10SLee Jones 	if (IS_ERR(gpiod)) {
92*835a0c10SLee Jones 		err = PTR_ERR(gpiod);
93*835a0c10SLee Jones 		goto out;
94*835a0c10SLee Jones 	}
95*835a0c10SLee Jones 	gpiod_put(gpiod);
96*835a0c10SLee Jones 
97*835a0c10SLee Jones 	return 0;
98*835a0c10SLee Jones out:
99*835a0c10SLee Jones 	simatic_ipc_leds_gpio_remove(pdev, table, table_extra);
100*835a0c10SLee Jones 
101*835a0c10SLee Jones 	return err;
102*835a0c10SLee Jones }
103*835a0c10SLee Jones EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_probe);
104*835a0c10SLee Jones 
105*835a0c10SLee Jones MODULE_DESCRIPTION("Siemens SIMATIC IPC core driver for GPIO based LEDs");
106*835a0c10SLee Jones MODULE_LICENSE("GPL v2");
107*835a0c10SLee Jones MODULE_SOFTDEP("pre: platform:leds-gpio");
108*835a0c10SLee Jones MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");
109