[people/ms/u-boot.git] / drivers / clk / clk_bcm6345.c

/*
 * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
 *
 * Derived from linux/arch/mips/bcm63xx/clk.c:
 *	Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
#include <errno.h>
#include <asm/io.h>

#define MAX_CLKS	32

struct bcm6345_clk_priv {
	void __iomem *regs;
};

static int bcm6345_clk_enable(struct clk *clk)
{
	struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);

	if (clk->id >= MAX_CLKS)
		return -EINVAL;

	setbits_be32(priv->regs, BIT(clk->id));

	return 0;
}

static int bcm6345_clk_disable(struct clk *clk)
{
	struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);

	if (clk->id >= MAX_CLKS)
		return -EINVAL;

	clrbits_be32(priv->regs, BIT(clk->id));

	return 0;
}

static struct clk_ops bcm6345_clk_ops = {
	.disable = bcm6345_clk_disable,
	.enable = bcm6345_clk_enable,
};

static const struct udevice_id bcm6345_clk_ids[] = {
	{ .compatible = "brcm,bcm6345-clk" },
	{ /* sentinel */ }
};

static int bcm63xx_clk_probe(struct udevice *dev)
{
	struct bcm6345_clk_priv *priv = dev_get_priv(dev);
	fdt_addr_t addr;
	fdt_size_t size;

	addr = devfdt_get_addr_size_index(dev, 0, &size);
	if (addr == FDT_ADDR_T_NONE)
		return -EINVAL;

	priv->regs = ioremap(addr, size);

	return 0;
}

U_BOOT_DRIVER(clk_bcm6345) = {
	.name = "clk_bcm6345",
	.id = UCLASS_CLK,
	.of_match = bcm6345_clk_ids,
	.ops = &bcm6345_clk_ops,
	.probe = bcm63xx_clk_probe,
	.priv_auto_alloc_size = sizeof(struct bcm6345_clk_priv),
};
Commit	Line	Data
5357eb95 ÁFR	1	/*
	2	* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
	3	*
	4	* Derived from linux/arch/mips/bcm63xx/clk.c:
	5	* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
	6	*
	7	* SPDX-License-Identifier: GPL-2.0+
	8	*/
	9
	10	#include <common.h>
	11	#include <clk-uclass.h>
	12	#include <dm.h>
	13	#include <errno.h>
	14	#include <asm/io.h>
	15
	16	#define MAX_CLKS 32
	17
	18	struct bcm6345_clk_priv {
	19	void __iomem *regs;
	20	};
	21
	22	static int bcm6345_clk_enable(struct clk *clk)
	23	{
	24	struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
	25
	26	if (clk->id >= MAX_CLKS)
	27	return -EINVAL;
	28
	29	setbits_be32(priv->regs, BIT(clk->id));
	30
	31	return 0;
	32	}
	33
	34	static int bcm6345_clk_disable(struct clk *clk)
	35	{
	36	struct bcm6345_clk_priv *priv = dev_get_priv(clk->dev);
	37
	38	if (clk->id >= MAX_CLKS)
	39	return -EINVAL;
	40
	41	clrbits_be32(priv->regs, BIT(clk->id));
	42
	43	return 0;
	44	}
	45
	46	static struct clk_ops bcm6345_clk_ops = {
	47	.disable = bcm6345_clk_disable,
	48	.enable = bcm6345_clk_enable,
	49	};
	50
	51	static const struct udevice_id bcm6345_clk_ids[] = {
	52	{ .compatible = "brcm,bcm6345-clk" },
	53	{ /* sentinel */ }
	54	};
	55
	56	static int bcm63xx_clk_probe(struct udevice *dev)
	57	{
	58	struct bcm6345_clk_priv *priv = dev_get_priv(dev);
	59	fdt_addr_t addr;
	60	fdt_size_t size;
	61
a821c4af	62	addr = devfdt_get_addr_size_index(dev, 0, &size);
5357eb95 ÁFR	63	if (addr == FDT_ADDR_T_NONE)
	64	return -EINVAL;
	65
	66	priv->regs = ioremap(addr, size);
	67
	68	return 0;
	69	}
	70
	71	U_BOOT_DRIVER(clk_bcm6345) = {
	72	.name = "clk_bcm6345",
	73	.id = UCLASS_CLK,
	74	.of_match = bcm6345_clk_ids,
	75	.ops = &bcm6345_clk_ops,
	76	.probe = bcm63xx_clk_probe,
	77	.priv_auto_alloc_size = sizeof(struct bcm6345_clk_priv),
	78	};