[people/ms/u-boot.git] / drivers / clk / clk_sandbox.c

/*
 * (C) Copyright 2015 Google, Inc
 *
 * SPDX-License-Identifier:	GPL-2.0
 */

#include <common.h>
#include <clk.h>
#include <dm.h>
#include <errno.h>
#include <asm/test.h>

struct sandbox_clk_priv {
	ulong rate;
	ulong periph_rate[PERIPH_ID_COUNT];
};

static ulong sandbox_clk_get_rate(struct udevice *dev)
{
	struct sandbox_clk_priv *priv = dev_get_priv(dev);

	return priv->rate;
}

static ulong sandbox_clk_set_rate(struct udevice *dev, ulong rate)
{
	struct sandbox_clk_priv *priv = dev_get_priv(dev);

	if (!rate)
		return -EINVAL;
	priv->rate = rate;
	return 0;
}

static ulong sandbox_get_periph_rate(struct udevice *dev, int periph)
{
	struct sandbox_clk_priv *priv = dev_get_priv(dev);

	if (periph < PERIPH_ID_FIRST || periph >= PERIPH_ID_COUNT)
		return -EINVAL;
	return priv->periph_rate[periph];
}

static ulong sandbox_set_periph_rate(struct udevice *dev, int periph,
				     ulong rate)
{
	struct sandbox_clk_priv *priv = dev_get_priv(dev);
	ulong old_rate;

	if (periph < PERIPH_ID_FIRST || periph >= PERIPH_ID_COUNT)
		return -EINVAL;
	old_rate = priv->periph_rate[periph];
	priv->periph_rate[periph] = rate;

	return old_rate;
}

static int sandbox_clk_probe(struct udevice *dev)
{
	struct sandbox_clk_priv *priv = dev_get_priv(dev);

	priv->rate = SANDBOX_CLK_RATE;

	return 0;
}

static struct clk_ops sandbox_clk_ops = {
	.get_rate	= sandbox_clk_get_rate,
	.set_rate	= sandbox_clk_set_rate,
	.get_periph_rate = sandbox_get_periph_rate,
	.set_periph_rate = sandbox_set_periph_rate,
};

static const struct udevice_id sandbox_clk_ids[] = {
	{ .compatible = "sandbox,clk" },
	{ }
};

U_BOOT_DRIVER(clk_sandbox) = {
	.name		= "clk_sandbox",
	.id		= UCLASS_CLK,
	.of_match	= sandbox_clk_ids,
	.ops		= &sandbox_clk_ops,
	.priv_auto_alloc_size = sizeof(struct sandbox_clk_priv),
	.probe		= sandbox_clk_probe,
};
Commit	Line	Data
6a1c7cef SG	1	/*
	2	* (C) Copyright 2015 Google, Inc
	3	*
	4	* SPDX-License-Identifier: GPL-2.0
	5	*/
	6
	7	#include <common.h>
	8	#include <clk.h>
	9	#include <dm.h>
	10	#include <errno.h>
	11	#include <asm/test.h>
	12
	13	struct sandbox_clk_priv {
	14	ulong rate;
	15	ulong periph_rate[PERIPH_ID_COUNT];
	16	};
	17
	18	static ulong sandbox_clk_get_rate(struct udevice *dev)
	19	{
	20	struct sandbox_clk_priv *priv = dev_get_priv(dev);
	21
	22	return priv->rate;
	23	}
	24
	25	static ulong sandbox_clk_set_rate(struct udevice *dev, ulong rate)
	26	{
	27	struct sandbox_clk_priv *priv = dev_get_priv(dev);
	28
	29	if (!rate)
	30	return -EINVAL;
	31	priv->rate = rate;
	32	return 0;
	33	}
	34
9e52126f	35	static ulong sandbox_get_periph_rate(struct udevice *dev, int periph)
6a1c7cef SG	36	{
	37	struct sandbox_clk_priv *priv = dev_get_priv(dev);
	38
	39	if (periph < PERIPH_ID_FIRST \|\| periph >= PERIPH_ID_COUNT)
	40	return -EINVAL;
	41	return priv->periph_rate[periph];
	42	}
	43
9e52126f MY	44	static ulong sandbox_set_periph_rate(struct udevice *dev, int periph,
9e52126f MY	45	ulong rate)
6a1c7cef SG	46	{
	47	struct sandbox_clk_priv *priv = dev_get_priv(dev);
	48	ulong old_rate;
	49
	50	if (periph < PERIPH_ID_FIRST \|\| periph >= PERIPH_ID_COUNT)
	51	return -EINVAL;
	52	old_rate = priv->periph_rate[periph];
	53	priv->periph_rate[periph] = rate;
	54
	55	return old_rate;
	56	}
	57
	58	static int sandbox_clk_probe(struct udevice *dev)
	59	{
	60	struct sandbox_clk_priv *priv = dev_get_priv(dev);
	61
	62	priv->rate = SANDBOX_CLK_RATE;
	63
	64	return 0;
	65	}
	66
	67	static struct clk_ops sandbox_clk_ops = {
	68	.get_rate = sandbox_clk_get_rate,
	69	.set_rate = sandbox_clk_set_rate,
	70	.get_periph_rate = sandbox_get_periph_rate,
	71	.set_periph_rate = sandbox_set_periph_rate,
	72	};
	73
	74	static const struct udevice_id sandbox_clk_ids[] = {
	75	{ .compatible = "sandbox,clk" },
	76	{ }
	77	};
	78
	79	U_BOOT_DRIVER(clk_sandbox) = {
	80	.name = "clk_sandbox",
	81	.id = UCLASS_CLK,
	82	.of_match = sandbox_clk_ids,
	83	.ops = &sandbox_clk_ops,
	84	.priv_auto_alloc_size = sizeof(struct sandbox_clk_priv),
	85	.probe = sandbox_clk_probe,
	86	};