tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
20static struct gpiod_lookup_table *batt_lookup_table;
21
22static 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
31static 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
39static 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
48static void simatic_ipc_batt_f7188x_remove(struct platform_device *pdev)
49{
50 simatic_ipc_batt_remove(pdev, batt_lookup_table);
51}
52
53static 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
74static struct platform_driver simatic_ipc_batt_driver = {
75 .probe = simatic_ipc_batt_f7188x_probe,
76 .remove = simatic_ipc_batt_f7188x_remove,
77 .driver = {
78 .name = KBUILD_MODNAME,
79 },
80};
81
82module_platform_driver(simatic_ipc_batt_driver);
83
84MODULE_DESCRIPTION("CMOS Battery monitoring for Simatic IPCs based on Nuvoton GPIO");
85MODULE_LICENSE("GPL");
86MODULE_ALIAS("platform:" KBUILD_MODNAME);
87MODULE_SOFTDEP("pre: simatic-ipc-batt gpio_f7188x platform:elkhartlake-pinctrl platform:alderlake-pinctrl");
88MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");