arch/powerpc/sysdev/cpm_gpio.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Common CPM GPIO wrapper for the CPM GPIO ports
   4  *
   5  * Author: Christophe Leroy <christophe.leroy@c-s.fr>
   6  *
   7  * Copyright 2017 CS Systemes d'Information.
   8  *
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/of.h>
  13 #include <linux/platform_device.h>
  14
  15 #include <asm/cpm.h>
  16 #ifdef CONFIG_8xx_GPIO
  17 #include <asm/cpm1.h>
  18 #endif
  19
  20 static int cpm_gpio_probe(struct platform_device *ofdev)
  21 {
  22         struct device *dev = &ofdev->dev;
  23         int (*gp_add)(struct device *dev) = of_device_get_match_data(dev);
  24
  25         if (!gp_add)
  26                 return -ENODEV;
  27
  28         return gp_add(dev);
  29 }
  30
  31 static const struct of_device_id cpm_gpio_match[] = {
  32 #ifdef CONFIG_8xx_GPIO
  33         {
  34                 .compatible = "fsl,cpm1-pario-bank-a",
  35                 .data = cpm1_gpiochip_add16,
  36         },
  37         {
  38                 .compatible = "fsl,cpm1-pario-bank-b",
  39                 .data = cpm1_gpiochip_add32,
  40         },
  41         {
  42                 .compatible = "fsl,cpm1-pario-bank-c",
  43                 .data = cpm1_gpiochip_add16,
  44         },
  45         {
  46                 .compatible = "fsl,cpm1-pario-bank-d",
  47                 .data = cpm1_gpiochip_add16,
  48         },
  49         /* Port E uses CPM2 layout */
  50         {
  51                 .compatible = "fsl,cpm1-pario-bank-e",
  52                 .data = cpm2_gpiochip_add32,
  53         },
  54 #endif
  55         {
  56                 .compatible = "fsl,cpm2-pario-bank",
  57                 .data = cpm2_gpiochip_add32,
  58         },
  59         {},
  60 };
  61 MODULE_DEVICE_TABLE(of, cpm_gpio_match);
  62
  63 static struct platform_driver cpm_gpio_driver = {
  64         .probe          = cpm_gpio_probe,
  65         .driver         = {
  66                 .name   = "cpm-gpio",
  67                 .of_match_table = cpm_gpio_match,
  68         },
  69 };
  70
  71 static int __init cpm_gpio_init(void)
  72 {
  73         return platform_driver_register(&cpm_gpio_driver);
  74 }
  75 arch_initcall(cpm_gpio_init);
  76
  77 MODULE_AUTHOR("Christophe Leroy <christophe.leroy@c-s.fr>");
  78 MODULE_DESCRIPTION("Driver for CPM GPIO");
  79 MODULE_LICENSE("GPL");
  80 MODULE_ALIAS("platform:cpm-gpio");