[mirror_ubuntu-hirsute-kernel.git] / arch / mips / lantiq / xway / vmmc.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *
 *  Copyright (C) 2012 John Crispin <john@phrozen.org>
 */

#include <linux/export.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.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)
	int gpio_count;
	dma_addr_t dma;

	cp1_base =
		(void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
						    &dma, GFP_KERNEL));

	gpio_count = of_gpio_count(pdev->dev.of_node);
	while (gpio_count > 0) {
		enum of_gpio_flags flags;
		int gpio = of_get_gpio_flags(pdev->dev.of_node,
					     --gpio_count, &flags);
		if (gpio_request(gpio, "vmmc-relay"))
			continue;
		dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
		gpio_direction_output(gpio,
				      (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
	}

	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);
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
05637f10	2	/*
05637f10	3	*
97b92108	4	* Copyright (C) 2012 John Crispin <john@phrozen.org>
05637f10 JC	5	*/
05637f10 JC	6
0008ef9b	7	#include <linux/export.h>
05637f10 JC	8	#include <linux/of_platform.h>
	9	#include <linux/of_gpio.h>
	10	#include <linux/dma-mapping.h>
	11
	12	#include <lantiq_soc.h>
	13
	14	static unsigned int *cp1_base;
	15
	16	unsigned int *ltq_get_cp1_base(void)
	17	{
	18	if (!cp1_base)
	19	panic("no cp1 base was set\n");
	20
	21	return cp1_base;
	22	}
	23	EXPORT_SYMBOL(ltq_get_cp1_base);
	24
	25	static int vmmc_probe(struct platform_device *pdev)
	26	{
	27	#define CP1_SIZE (1 << 20)
	28	int gpio_count;
	29	dma_addr_t dma;
	30
	31	cp1_base =
74f03104 CH	32	(void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
74f03104 CH	33	&dma, GFP_KERNEL));
05637f10 JC	34
	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"))
	41	continue;
	42	dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
	43	gpio_direction_output(gpio,
	44	(flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
	45	}
	46
	47	dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
	48
	49	return 0;
	50	}
	51
	52	static const struct of_device_id vmmc_match[] = {
	53	{ .compatible = "lantiq,vmmc-xway" },
	54	{},
	55	};
05637f10 JC	56
	57	static struct platform_driver vmmc_driver = {
	58	.probe = vmmc_probe,
	59	.driver = {
	60	.name = "lantiq,vmmc",
05637f10 JC	61	.of_match_table = vmmc_match,
	62	},
	63	};
0008ef9b	64	builtin_platform_driver(vmmc_driver);