[people/ms/u-boot.git] / drivers / power / pmic / rk808.c

/*
 * Copyright (C) 2015 Google, Inc
 * Written by Simon Glass <sjg@chromium.org>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <power/rk808_pmic.h>
#include <power/pmic.h>

DECLARE_GLOBAL_DATA_PTR;

static const struct pmic_child_info pmic_children_info[] = {
	{ .prefix = "DCDC_REG", .driver = "rk808_buck"},
	{ .prefix = "LDO_REG", .driver = "rk808_ldo"},
	{ .prefix = "SWITCH_REG", .driver = "rk808_switch"},
	{ },
};

static int rk808_reg_count(struct udevice *dev)
{
	return RK808_NUM_OF_REGS;
}

static int rk808_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 rk808_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 rk808_bind(struct udevice *dev)
{
	const void *blob = gd->fdt_blob;
	int regulators_node;
	int children;

	regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
					     "regulators");
	if (regulators_node <= 0) {
		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 struct dm_pmic_ops rk808_ops = {
	.reg_count = rk808_reg_count,
	.read = rk808_read,
	.write = rk808_write,
};

static const struct udevice_id rk808_ids[] = {
	{ .compatible = "rockchip,rk808" },
	{ }
};

U_BOOT_DRIVER(pmic_rk808) = {
	.name = "rk808 pmic",
	.id = UCLASS_PMIC,
	.of_match = rk808_ids,
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
	.bind = rk808_bind,
#endif
	.ops = &rk808_ops,
};
Commit	Line	Data
2a4febfd SG	1	/*
	2	* Copyright (C) 2015 Google, Inc
	3	* Written by Simon Glass <sjg@chromium.org>
	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>
	13	#include <power/rk808_pmic.h>
	14	#include <power/pmic.h>
	15
	16	DECLARE_GLOBAL_DATA_PTR;
	17
	18	static const struct pmic_child_info pmic_children_info[] = {
	19	{ .prefix = "DCDC_REG", .driver = "rk808_buck"},
	20	{ .prefix = "LDO_REG", .driver = "rk808_ldo"},
	21	{ .prefix = "SWITCH_REG", .driver = "rk808_switch"},
	22	{ },
	23	};
	24
	25	static int rk808_reg_count(struct udevice *dev)
	26	{
	27	return RK808_NUM_OF_REGS;
	28	}
	29
	30	static int rk808_write(struct udevice dev, uint reg, const uint8_t buff,
	31	int len)
	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
	44	static int rk808_read(struct udevice dev, uint reg, uint8_t buff, int len)
	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)
	58	static int rk808_bind(struct udevice *dev)
	59	{
	60	const void *blob = gd->fdt_blob;
	61	int regulators_node;
	62	int children;
	63
e160f7d4	64	regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
2a4febfd SG	65	"regulators");
	66	if (regulators_node <= 0) {
	67	debug("%s: %s regulators subnode not found!", __func__,
	68	dev->name);
	69	return -ENXIO;
	70	}
	71
	72	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
	73
	74	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
	75	if (!children)
	76	debug("%s: %s - no child found\n", __func__, dev->name);
	77
	78	/* Always return success for this device */
	79	return 0;
	80	}
	81	#endif
	82
	83	static struct dm_pmic_ops rk808_ops = {
	84	.reg_count = rk808_reg_count,
	85	.read = rk808_read,
	86	.write = rk808_write,
	87	};
	88
	89	static const struct udevice_id rk808_ids[] = {
	90	{ .compatible = "rockchip,rk808" },
	91	{ }
	92	};
	93
	94	U_BOOT_DRIVER(pmic_rk808) = {
	95	.name = "rk808 pmic",
	96	.id = UCLASS_PMIC,
	97	.of_match = rk808_ids,
	98	#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
	99	.bind = rk808_bind,
	100	#endif
	101	.ops = &rk808_ops,
	102	};