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Linux/arch/powerpc/sysdev/cpm_gpio.c

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  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                 .of_match_table = cpm_gpio_match,
 67         },
 68 };
 69 
 70 static int __init cpm_gpio_init(void)
 71 {
 72         return platform_driver_register(&cpm_gpio_driver);
 73 }
 74 arch_initcall(cpm_gpio_init);
 75 
 76 MODULE_AUTHOR("Christophe Leroy <christophe.leroy@c-s.fr>");
 77 MODULE_DESCRIPTION("Driver for CPM GPIO");
 78 MODULE_LICENSE("GPL");
 79 MODULE_ALIAS("platform:cpm-gpio");
 80 

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