[J-u-boot.git] / drivers / power / pmic / rk8xx.c

/*
 * Copyright (C) 2015 Google, Inc
 * Written by Simon Glass <[email protected]>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <power/rk8xx_pmic.h>
#include <power/pmic.h>

DECLARE_GLOBAL_DATA_PTR;

static const struct pmic_child_info pmic_children_info[] = {
	{ .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
	{ .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
	{ .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
	{ },
};

static int rk8xx_reg_count(struct udevice *dev)
{
	return RK808_NUM_OF_REGS;
}

static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff,
			  int len)
{
	int ret;

	ret = dm_i2c_write(dev, reg, buff, len);
	if (ret) {
		debug("write error to device: %p register: %#x!", dev, reg);
		return ret;
	}

	return 0;
}

static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
	int ret;

	ret = dm_i2c_read(dev, reg, buff, len);
	if (ret) {
		debug("read error from device: %p register: %#x!", dev, reg);
		return ret;
	}

	return 0;
}

#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
static int rk8xx_bind(struct udevice *dev)
{
	ofnode regulators_node;
	int children;

	regulators_node = dev_read_subnode(dev, "regulators");
	if (!ofnode_valid(regulators_node)) {
		debug("%s: %s regulators subnode not found!", __func__,
		      dev->name);
		return -ENXIO;
	}

	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);

	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
	if (!children)
		debug("%s: %s - no child found\n", __func__, dev->name);

	/* Always return success for this device */
	return 0;
}
#endif

static int rk8xx_probe(struct udevice *dev)
{
	struct rk8xx_priv *priv = dev_get_priv(dev);
	uint8_t msb, lsb;

	/* read Chip variant */
	rk8xx_read(dev, ID_MSB, &msb, 1);
	rk8xx_read(dev, ID_LSB, &lsb, 1);

	priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;

	return 0;
}

static struct dm_pmic_ops rk8xx_ops = {
	.reg_count = rk8xx_reg_count,
	.read = rk8xx_read,
	.write = rk8xx_write,
};

static const struct udevice_id rk8xx_ids[] = {
	{ .compatible = "rockchip,rk808" },
	{ .compatible = "rockchip,rk818" },
	{ }
};

U_BOOT_DRIVER(pmic_rk8xx) = {
	.name = "rk8xx pmic",
	.id = UCLASS_PMIC,
	.of_match = rk8xx_ids,
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
	.bind = rk8xx_bind,
#endif
	.probe = rk8xx_probe,
	.ops = &rk8xx_ops,
};
Commit	Line	Data
2a4febfd SG	1	/*
	2	* Copyright (C) 2015 Google, Inc
	3	* Written by Simon Glass <[email protected]>
	4	*
	5	* SPDX-License-Identifier: GPL-2.0+
	6	*/
	7
	8	#include <common.h>
	9	#include <dm.h>
	10	#include <errno.h>
	11	#include <fdtdec.h>
	12	#include <libfdt.h>
453c5a92	13	#include <power/rk8xx_pmic.h>
2a4febfd SG	14	#include <power/pmic.h>
	15
	16	DECLARE_GLOBAL_DATA_PTR;
	17
	18	static const struct pmic_child_info pmic_children_info[] = {
453c5a92 JC	19	{ .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
	20	{ .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
	21	{ .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
2a4febfd SG	22	{ },
	23	};
	24
453c5a92	25	static int rk8xx_reg_count(struct udevice *dev)
2a4febfd SG	26	{
	27	return RK808_NUM_OF_REGS;
	28	}
	29
453c5a92	30	static int rk8xx_write(struct udevice dev, uint reg, const uint8_t buff,
2a4febfd SG	31	int len)
2a4febfd SG	32	{
7d577999 SG	33	int ret;
	34
	35	ret = dm_i2c_write(dev, reg, buff, len);
	36	if (ret) {
2a4febfd	37	debug("write error to device: %p register: %#x!", dev, reg);
7d577999	38	return ret;
2a4febfd SG	39	}
	40
	41	return 0;
	42	}
	43
453c5a92	44	static int rk8xx_read(struct udevice dev, uint reg, uint8_t buff, int len)
2a4febfd	45	{
7d577999 SG	46	int ret;
	47
	48	ret = dm_i2c_read(dev, reg, buff, len);
	49	if (ret) {
2a4febfd	50	debug("read error from device: %p register: %#x!", dev, reg);
7d577999	51	return ret;
2a4febfd SG	52	}
	53
	54	return 0;
	55	}
	56
	57	#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
453c5a92	58	static int rk8xx_bind(struct udevice *dev)
2a4febfd	59	{
7a869e6c	60	ofnode regulators_node;
2a4febfd SG	61	int children;
2a4febfd SG	62
7a869e6c SG	63	regulators_node = dev_read_subnode(dev, "regulators");
7a869e6c SG	64	if (!ofnode_valid(regulators_node)) {
2a4febfd SG	65	debug("%s: %s regulators subnode not found!", __func__,
	66	dev->name);
	67	return -ENXIO;
	68	}
	69
	70	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
	71
	72	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
	73	if (!children)
	74	debug("%s: %s - no child found\n", __func__, dev->name);
	75
	76	/* Always return success for this device */
	77	return 0;
	78	}
	79	#endif
	80
453c5a92	81	static int rk8xx_probe(struct udevice *dev)
d77af8a8	82	{
453c5a92	83	struct rk8xx_priv *priv = dev_get_priv(dev);
d77af8a8 JC	84	uint8_t msb, lsb;
	85
	86	/* read Chip variant */
453c5a92 JC	87	rk8xx_read(dev, ID_MSB, &msb, 1);
453c5a92 JC	88	rk8xx_read(dev, ID_LSB, &lsb, 1);
d77af8a8 JC	89
	90	priv->variant = ((msb << 8) \| lsb) & RK8XX_ID_MSK;
	91
	92	return 0;
	93	}
	94
453c5a92 JC	95	static struct dm_pmic_ops rk8xx_ops = {
	96	.reg_count = rk8xx_reg_count,
	97	.read = rk8xx_read,
	98	.write = rk8xx_write,
2a4febfd SG	99	};
2a4febfd SG	100
453c5a92	101	static const struct udevice_id rk8xx_ids[] = {
2a4febfd	102	{ .compatible = "rockchip,rk808" },
d77af8a8	103	{ .compatible = "rockchip,rk818" },
2a4febfd SG	104	{ }
	105	};
	106
453c5a92 JC	107	U_BOOT_DRIVER(pmic_rk8xx) = {
453c5a92 JC	108	.name = "rk8xx pmic",
2a4febfd	109	.id = UCLASS_PMIC,
453c5a92	110	.of_match = rk8xx_ids,
2a4febfd	111	#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
453c5a92	112	.bind = rk8xx_bind,
2a4febfd	113	#endif
453c5a92 JC	114	.probe = rk8xx_probe,
453c5a92 JC	115	.ops = &rk8xx_ops,
2a4febfd	116	};