82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/*
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* Copyright (C) 2013-2014 Alexander Shiyan <shc_work@mail.ru>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#include <init.h>
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#include <common.h>
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#include <malloc.h>
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#include <linux/basic_mmio_gpio.h>
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static int clps711x_gpio_probe(struct device_d *dev)
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{
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int err, id = dev->id;
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void __iomem *dat, *dir = NULL, *dir_inv = NULL;
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struct bgpio_chip *bgc;
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if (dev->device_node)
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id = of_alias_get_id(dev->device_node, "gpio");
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if (id < 0 || id > 4)
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return -ENODEV;
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dat = dev_request_mem_region(dev, 0);
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switch (id) {
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case 3:
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dir_inv = dev_request_mem_region(dev, 1);
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break;
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default:
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dir = dev_request_mem_region(dev, 1);
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break;
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}
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if (!dat || (!dir && !dir_inv))
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return -EINVAL;
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bgc = xzalloc(sizeof(struct bgpio_chip));
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if (!bgc)
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return -ENOMEM;
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err = bgpio_init(bgc, dev, 1, dat, NULL, NULL, dir, dir_inv, 0);
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if (err)
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goto out_err;
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bgc->gc.base = id * 8;
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switch (id) {
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case 4:
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bgc->gc.ngpio = 3;
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break;
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default:
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break;
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}
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err = gpiochip_add(&bgc->gc);
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out_err:
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if (err)
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free(bgc);
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return err;
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}
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static struct of_device_id __maybe_unused clps711x_gpio_dt_ids[] = {
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{ .compatible = "cirrus,clps711x-gpio", },
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};
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static struct driver_d clps711x_gpio_driver = {
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.name = "clps711x-gpio",
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.probe = clps711x_gpio_probe,
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.of_compatible = DRV_OF_COMPAT(clps711x_gpio_dt_ids),
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};
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static __init int clps711x_gpio_register(void)
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{
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return platform_driver_register(&clps711x_gpio_driver);
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}
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coredevice_initcall(clps711x_gpio_register);
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