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