drivers/platform/x86/siemens/simatic-ipc-batt-f7188x.c

   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 <[email protected]>
   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 = 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 <[email protected]>");