1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (C) 2012 John Crispin <john@phrozen.org>
7 #include <linux/export.h>
8 #include <linux/of_platform.h>
9 #include <linux/of_gpio.h>
10 #include <linux/dma-mapping.h>
12 #include <lantiq_soc.h>
14 static unsigned int *cp1_base
;
16 unsigned int *ltq_get_cp1_base(void)
19 panic("no cp1 base was set\n");
23 EXPORT_SYMBOL(ltq_get_cp1_base
);
25 static int vmmc_probe(struct platform_device
*pdev
)
27 #define CP1_SIZE (1 << 20)
32 (void *) CPHYSADDR(dma_alloc_coherent(&pdev
->dev
, CP1_SIZE
,
35 gpio_count
= of_gpio_count(pdev
->dev
.of_node
);
36 while (gpio_count
> 0) {
37 enum of_gpio_flags flags
;
38 int gpio
= of_get_gpio_flags(pdev
->dev
.of_node
,
39 --gpio_count
, &flags
);
40 if (gpio_request(gpio
, "vmmc-relay"))
42 dev_info(&pdev
->dev
, "requested GPIO %d\n", gpio
);
43 gpio_direction_output(gpio
,
44 (flags
& OF_GPIO_ACTIVE_LOW
) ? (0) : (1));
47 dev_info(&pdev
->dev
, "reserved %dMB at 0x%p", CP1_SIZE
>> 20, cp1_base
);
52 static const struct of_device_id vmmc_match
[] = {
53 { .compatible
= "lantiq,vmmc-xway" },
57 static struct platform_driver vmmc_driver
= {
60 .name
= "lantiq,vmmc",
61 .of_match_table
= vmmc_match
,
64 builtin_platform_driver(vmmc_driver
);