LXR linux/arch/powerpc/sysdev/cpm

   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
  19static 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
  30static 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};
  60MODULE_DEVICE_TABLE(of, cpm_gpio_match);
  61
  62static struct platform_driver cpm_gpio_driver = {
  63        .probe          = cpm_gpio_probe,
  64        .driver         = {
  65                .name   = "cpm-gpio",
  66                .of_match_table = cpm_gpio_match,
  67        },
  68};
  69
  70static int __init cpm_gpio_init(void)
  71{
  72        return platform_driver_register(&cpm_gpio_driver);
  73}
  74arch_initcall(cpm_gpio_init);
  75
  76MODULE_AUTHOR("Christophe Leroy <christophe.leroy@c-s.fr>");
  77MODULE_DESCRIPTION("Driver for CPM GPIO");
  78MODULE_LICENSE("GPL");
  79MODULE_ALIAS("platform:cpm-gpio");
  80