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

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

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

static struct reg_data rk817_init_reg[] = {
/* enable the under-voltage protection,
 * the under-voltage protection will shutdown the LDO3 and reset the PMIC
 */
	{ RK817_BUCK4_CMIN, 0x60, 0x60},
};

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!\n", 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!\n", 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!\n", __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);
	struct reg_data *init_data = NULL;
	int init_data_num = 0;
	int ret = 0, i, show_variant;
	u8 msb, lsb, id_msb, id_lsb;
	u8 on_source = 0, off_source = 0;
	u8 power_en0, power_en1, power_en2, power_en3;
	u8 value;

	/* read Chip variant */
	if (device_is_compatible(dev, "rockchip,rk817") ||
	    device_is_compatible(dev, "rockchip,rk809")) {
		id_msb = RK817_ID_MSB;
		id_lsb = RK817_ID_LSB;
	} else {
		id_msb = ID_MSB;
		id_lsb = ID_LSB;
	}

	ret = rk8xx_read(dev, id_msb, &msb, 1);
	if (ret)
		return ret;
	ret = rk8xx_read(dev, id_lsb, &lsb, 1);
	if (ret)
		return ret;

	priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
	show_variant = priv->variant;
	switch (priv->variant) {
	case RK808_ID:
		show_variant = 0x808;	/* RK808 hardware ID is 0 */
		break;
	case RK805_ID:
	case RK816_ID:
	case RK818_ID:
		on_source = RK8XX_ON_SOURCE;
		off_source = RK8XX_OFF_SOURCE;
		break;
	case RK809_ID:
	case RK817_ID:
		on_source = RK817_ON_SOURCE;
		off_source = RK817_OFF_SOURCE;
		init_data = rk817_init_reg;
		init_data_num = ARRAY_SIZE(rk817_init_reg);
		power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
		power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
		power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
		power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);

		value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4);
		pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
		value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4);
		pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
		break;
	default:
		printf("Unknown PMIC: RK%x!!\n", priv->variant);
		return -EINVAL;
	}

	for (i = 0; i < init_data_num; i++) {
		ret = pmic_clrsetbits(dev,
				      init_data[i].reg,
				      init_data[i].mask,
				      init_data[i].val);
		if (ret < 0) {
			printf("%s: i2c set reg 0x%x failed, ret=%d\n",
			       __func__, init_data[i].reg, ret);
		}

		debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
		      pmic_reg_read(dev, init_data[i].reg));
	}

	printf("PMIC:  RK%x ", show_variant);

	if (on_source && off_source)
		printf("(on=0x%02x, off=0x%02x)",
		       pmic_reg_read(dev, on_source),
		       pmic_reg_read(dev, off_source));
	printf("\n");

	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,rk805" },
	{ .compatible = "rockchip,rk808" },
	{ .compatible = "rockchip,rk809" },
	{ .compatible = "rockchip,rk816" },
	{ .compatible = "rockchip,rk817" },
	{ .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
	.priv_auto_alloc_size   = sizeof(struct rk8xx_priv),
	.probe = rk8xx_probe,
	.ops = &rk8xx_ops,
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
2a4febfd SG	2	/*
	3	* Copyright (C) 2015 Google, Inc
	4	* Written by Simon Glass <[email protected]>
2a4febfd SG	5	*/
	6
	7	#include <common.h>
	8	#include <dm.h>
	9	#include <errno.h>
f7ae49fc	10	#include <log.h>
453c5a92	11	#include <power/rk8xx_pmic.h>
2a4febfd SG	12	#include <power/pmic.h>
2a4febfd SG	13
b4a35574 JC	14	static struct reg_data rk817_init_reg[] = {
	15	/* enable the under-voltage protection,
	16	* the under-voltage protection will shutdown the LDO3 and reset the PMIC
	17	*/
	18	{ RK817_BUCK4_CMIN, 0x60, 0x60},
	19	};
	20
2a4febfd	21	static const struct pmic_child_info pmic_children_info[] = {
453c5a92 JC	22	{ .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
	23	{ .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
	24	{ .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
2a4febfd SG	25	{ },
	26	};
	27
453c5a92	28	static int rk8xx_reg_count(struct udevice *dev)
2a4febfd SG	29	{
	30	return RK808_NUM_OF_REGS;
	31	}
	32
453c5a92	33	static int rk8xx_write(struct udevice dev, uint reg, const uint8_t buff,
2a4febfd SG	34	int len)
2a4febfd SG	35	{
7d577999 SG	36	int ret;
	37
	38	ret = dm_i2c_write(dev, reg, buff, len);
	39	if (ret) {
c83c436d	40	debug("write error to device: %p register: %#x!\n", dev, reg);
7d577999	41	return ret;
2a4febfd SG	42	}
	43
	44	return 0;
	45	}
	46
453c5a92	47	static int rk8xx_read(struct udevice dev, uint reg, uint8_t buff, int len)
2a4febfd	48	{
7d577999 SG	49	int ret;
	50
	51	ret = dm_i2c_read(dev, reg, buff, len);
	52	if (ret) {
c83c436d	53	debug("read error from device: %p register: %#x!\n", dev, reg);
7d577999	54	return ret;
2a4febfd SG	55	}
	56
	57	return 0;
	58	}
	59
	60	#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
453c5a92	61	static int rk8xx_bind(struct udevice *dev)
2a4febfd	62	{
7a869e6c	63	ofnode regulators_node;
2a4febfd SG	64	int children;
2a4febfd SG	65
7a869e6c SG	66	regulators_node = dev_read_subnode(dev, "regulators");
7a869e6c SG	67	if (!ofnode_valid(regulators_node)) {
c83c436d	68	debug("%s: %s regulators subnode not found!\n", __func__,
2a4febfd SG	69	dev->name);
	70	return -ENXIO;
	71	}
	72
	73	debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
	74
	75	children = pmic_bind_children(dev, regulators_node, pmic_children_info);
	76	if (!children)
	77	debug("%s: %s - no child found\n", __func__, dev->name);
	78
	79	/* Always return success for this device */
	80	return 0;
	81	}
	82	#endif
	83
453c5a92	84	static int rk8xx_probe(struct udevice *dev)
d77af8a8	85	{
453c5a92	86	struct rk8xx_priv *priv = dev_get_priv(dev);
b4a35574 JC	87	struct reg_data *init_data = NULL;
	88	int init_data_num = 0;
	89	int ret = 0, i, show_variant;
	90	u8 msb, lsb, id_msb, id_lsb;
	91	u8 on_source = 0, off_source = 0;
	92	u8 power_en0, power_en1, power_en2, power_en3;
	93	u8 value;
d77af8a8 JC	94
d77af8a8 JC	95	/* read Chip variant */
ee30068f JC	96	if (device_is_compatible(dev, "rockchip,rk817") \|\|
ee30068f JC	97	device_is_compatible(dev, "rockchip,rk809")) {
b4a35574 JC	98	id_msb = RK817_ID_MSB;
	99	id_lsb = RK817_ID_LSB;
	100	} else {
	101	id_msb = ID_MSB;
	102	id_lsb = ID_LSB;
	103	}
	104
	105	ret = rk8xx_read(dev, id_msb, &msb, 1);
	106	if (ret)
	107	return ret;
	108	ret = rk8xx_read(dev, id_lsb, &lsb, 1);
	109	if (ret)
	110	return ret;
d77af8a8 JC	111
d77af8a8 JC	112	priv->variant = ((msb << 8) \| lsb) & RK8XX_ID_MSK;
b4a35574 JC	113	show_variant = priv->variant;
	114	switch (priv->variant) {
	115	case RK808_ID:
	116	show_variant = 0x808; /* RK808 hardware ID is 0 */
	117	break;
	118	case RK805_ID:
	119	case RK816_ID:
	120	case RK818_ID:
	121	on_source = RK8XX_ON_SOURCE;
	122	off_source = RK8XX_OFF_SOURCE;
	123	break;
ee30068f	124	case RK809_ID:
b4a35574 JC	125	case RK817_ID:
	126	on_source = RK817_ON_SOURCE;
	127	off_source = RK817_OFF_SOURCE;
	128	init_data = rk817_init_reg;
	129	init_data_num = ARRAY_SIZE(rk817_init_reg);
	130	power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
	131	power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
	132	power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
	133	power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);
	134
	135	value = (power_en0 & 0x0f) \| ((power_en1 & 0x0f) << 4);
	136	pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
	137	value = (power_en2 & 0x0f) \| ((power_en3 & 0x0f) << 4);
	138	pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
	139	break;
	140	default:
	141	printf("Unknown PMIC: RK%x!!\n", priv->variant);
	142	return -EINVAL;
	143	}
	144
	145	for (i = 0; i < init_data_num; i++) {
	146	ret = pmic_clrsetbits(dev,
	147	init_data[i].reg,
	148	init_data[i].mask,
	149	init_data[i].val);
	150	if (ret < 0) {
	151	printf("%s: i2c set reg 0x%x failed, ret=%d\n",
	152	__func__, init_data[i].reg, ret);
	153	}
	154
	155	debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
	156	pmic_reg_read(dev, init_data[i].reg));
	157	}
	158
	159	printf("PMIC: RK%x ", show_variant);
	160
	161	if (on_source && off_source)
	162	printf("(on=0x%02x, off=0x%02x)",
	163	pmic_reg_read(dev, on_source),
	164	pmic_reg_read(dev, off_source));
	165	printf("\n");
d77af8a8 JC	166
	167	return 0;
	168	}
	169
453c5a92 JC	170	static struct dm_pmic_ops rk8xx_ops = {
	171	.reg_count = rk8xx_reg_count,
	172	.read = rk8xx_read,
	173	.write = rk8xx_write,
2a4febfd SG	174	};
2a4febfd SG	175
453c5a92	176	static const struct udevice_id rk8xx_ids[] = {
b6228074	177	{ .compatible = "rockchip,rk805" },
2a4febfd	178	{ .compatible = "rockchip,rk808" },
ee30068f	179	{ .compatible = "rockchip,rk809" },
addd062b	180	{ .compatible = "rockchip,rk816" },
b4a35574	181	{ .compatible = "rockchip,rk817" },
d77af8a8	182	{ .compatible = "rockchip,rk818" },
2a4febfd SG	183	{ }
	184	};
	185
453c5a92 JC	186	U_BOOT_DRIVER(pmic_rk8xx) = {
453c5a92 JC	187	.name = "rk8xx pmic",
2a4febfd	188	.id = UCLASS_PMIC,
453c5a92	189	.of_match = rk8xx_ids,
2a4febfd	190	#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
453c5a92	191	.bind = rk8xx_bind,
2a4febfd	192	#endif
7c1fb0a7	193	.priv_auto_alloc_size = sizeof(struct rk8xx_priv),
453c5a92 JC	194	.probe = rk8xx_probe,
453c5a92 JC	195	.ops = &rk8xx_ops,
2a4febfd	196	};