xref: /linux/drivers/platform/x86/siemens/simatic-ipc-batt-f7188x.c (revision c532de5a67a70f8533d495f8f2aaa9a0491c3ad0)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Siemens SIMATIC IPC driver for CMOS battery monitoring
4  *
5  * Copyright (c) Siemens AG, 2023
6  *
7  * Authors:
8  *  Henning Schild <henning.schild@siemens.com>
9  */
10 
11 #include <linux/gpio/machine.h>
12 #include <linux/gpio/consumer.h>
13 #include <linux/kernel.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-batt.h"
19 
20 static struct gpiod_lookup_table *batt_lookup_table;
21 
22 static struct gpiod_lookup_table simatic_ipc_batt_gpio_table_227g = {
23 	.table = {
24 		GPIO_LOOKUP_IDX("gpio-f7188x-7", 6, NULL, 0, GPIO_ACTIVE_HIGH),
25 		GPIO_LOOKUP_IDX("gpio-f7188x-7", 5, NULL, 1, GPIO_ACTIVE_HIGH),
26 		GPIO_LOOKUP_IDX("INTC1020:01",  66, NULL, 2, GPIO_ACTIVE_HIGH),
27 		{} /* Terminating entry */
28 	},
29 };
30 
31 static struct gpiod_lookup_table simatic_ipc_batt_gpio_table_bx_39a = {
32 	.table = {
33 		GPIO_LOOKUP_IDX("gpio-f7188x-6", 4, NULL, 0, GPIO_ACTIVE_HIGH),
34 		GPIO_LOOKUP_IDX("gpio-f7188x-6", 3, NULL, 1, GPIO_ACTIVE_HIGH),
35 		{} /* Terminating entry */
36 	},
37 };
38 
39 static struct gpiod_lookup_table simatic_ipc_batt_gpio_table_bx_59a = {
40 	.table = {
41 		GPIO_LOOKUP_IDX("gpio-f7188x-7", 6, NULL, 0, GPIO_ACTIVE_HIGH),
42 		GPIO_LOOKUP_IDX("gpio-f7188x-7", 5, NULL, 1, GPIO_ACTIVE_HIGH),
43 		GPIO_LOOKUP_IDX("INTC1056:00", 438, NULL, 2, GPIO_ACTIVE_HIGH),
44 		{} /* Terminating entry */
45 	}
46 };
47 
48 static void simatic_ipc_batt_f7188x_remove(struct platform_device *pdev)
49 {
50 	simatic_ipc_batt_remove(pdev, batt_lookup_table);
51 }
52 
53 static int simatic_ipc_batt_f7188x_probe(struct platform_device *pdev)
54 {
55 	const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
56 
57 	switch (plat->devmode) {
58 	case SIMATIC_IPC_DEVICE_227G:
59 		batt_lookup_table = &simatic_ipc_batt_gpio_table_227g;
60 		break;
61 	case SIMATIC_IPC_DEVICE_BX_39A:
62 		batt_lookup_table = &simatic_ipc_batt_gpio_table_bx_39a;
63 		break;
64 	case SIMATIC_IPC_DEVICE_BX_59A:
65 		batt_lookup_table = &simatic_ipc_batt_gpio_table_bx_59a;
66 		break;
67 	default:
68 		return -ENODEV;
69 	}
70 
71 	return simatic_ipc_batt_probe(pdev, batt_lookup_table);
72 }
73 
74 static struct platform_driver simatic_ipc_batt_driver = {
75 	.probe = simatic_ipc_batt_f7188x_probe,
76 	.remove_new = simatic_ipc_batt_f7188x_remove,
77 	.driver = {
78 		.name = KBUILD_MODNAME,
79 	},
80 };
81 
82 module_platform_driver(simatic_ipc_batt_driver);
83 
84 MODULE_DESCRIPTION("CMOS Battery monitoring for Simatic IPCs based on Nuvoton GPIO");
85 MODULE_LICENSE("GPL");
86 MODULE_ALIAS("platform:" KBUILD_MODNAME);
87 MODULE_SOFTDEP("pre: simatic-ipc-batt gpio_f7188x platform:elkhartlake-pinctrl platform:alderlake-pinctrl");
88 MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");
89