71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
*
|
||
|
|
* Copyright (C) 2012 John Crispin <john@phrozen.org>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/export.h>
|
||
|
|
#include <linux/gpio/consumer.h>
|
||
|
|
#include <linux/of_platform.h>
|
||
|
|
#include <linux/dma-mapping.h>
|
||
|
|
|
||
|
|
#include <lantiq_soc.h>
|
||
|
|
|
||
|
|
static unsigned int *cp1_base;
|
||
|
|
|
||
|
|
unsigned int *ltq_get_cp1_base(void)
|
||
|
|
{
|
||
|
|
if (!cp1_base)
|
||
|
|
panic("no cp1 base was set\n");
|
||
|
|
|
||
|
|
return cp1_base;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(ltq_get_cp1_base);
|
||
|
|
|
||
|
|
static int vmmc_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
#define CP1_SIZE (1 << 20)
|
||
|
|
struct gpio_desc *gpio;
|
||
|
|
int gpio_count;
|
||
|
|
dma_addr_t dma;
|
||
|
|
int error;
|
||
|
|
|
||
|
|
cp1_base =
|
||
|
|
(void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
|
||
|
|
&dma, GFP_KERNEL));
|
||
|
|
|
||
|
|
gpio_count = gpiod_count(&pdev->dev, NULL);
|
||
|
|
while (gpio_count > 0) {
|
||
|
|
gpio = devm_gpiod_get_index(&pdev->dev,
|
||
|
|
NULL, --gpio_count, GPIOD_OUT_HIGH);
|
||
|
|
error = PTR_ERR_OR_ZERO(gpio);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&pdev->dev,
|
||
|
|
"failed to request GPIO idx %d: %d\n",
|
||
|
|
gpio_count, error);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
gpiod_set_consumer_name(gpio, "vmmc-relay");
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id vmmc_match[] = {
|
||
|
|
{ .compatible = "lantiq,vmmc-xway" },
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct platform_driver vmmc_driver = {
|
||
|
|
.probe = vmmc_probe,
|
||
|
|
.driver = {
|
||
|
|
.name = "lantiq,vmmc",
|
||
|
|
.of_match_table = vmmc_match,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
builtin_platform_driver(vmmc_driver);
|