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_device.h>
  13
  14 #include <asm/cpm.h>
  15 #ifdef CONFIG_8xx_GPIO
  16 #include <asm/cpm1.h>
  17 #endif
  18
  19 static int cpm_gpio_probe(struct platform_device *ofdev)
  20 {
  21         struct device *dev = &ofdev->dev;
  22         int (*gp_add)(struct device *dev) = of_device_get_match_data(dev);
  23
  24         if (!gp_add)
  25                 return -ENODEV;
  26
  27         return gp_add(dev);
  28 }
  29
  30 static const struct of_device_id cpm_gpio_match[] = {
  31 #ifdef CONFIG_8xx_GPIO
  32         {
  33                 .compatible = "fsl,cpm1-pario-bank-a",
  34                 .data = cpm1_gpiochip_add16,
  35         },
  36         {
  37                 .compatible = "fsl,cpm1-pario-bank-b",
  38                 .data = cpm1_gpiochip_add32,
  39         },
  40         {
  41                 .compatible = "fsl,cpm1-pario-bank-c",
  42                 .data = cpm1_gpiochip_add16,
  43         },
  44         {
  45                 .compatible = "fsl,cpm1-pario-bank-d",
  46                 .data = cpm1_gpiochip_add16,
  47         },
  48         /* Port E uses CPM2 layout */
  49         {
  50                 .compatible = "fsl,cpm1-pario-bank-e",
  51                 .data = cpm2_gpiochip_add32,
  52         },
  53 #endif
  54         {
  55                 .compatible = "fsl,cpm2-pario-bank",
  56                 .data = cpm2_gpiochip_add32,
  57         },
  58         {},
  59 };
  60 MODULE_DEVICE_TABLE(of, cpm_gpio_match);
  61
  62 static struct platform_driver cpm_gpio_driver = {
  63         .probe          = cpm_gpio_probe,
  64         .driver         = {
  65                 .name   = "cpm-gpio",
  66                 .owner  = THIS_MODULE,
  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");