drivers/power/pmic/rk8xx.c - platform/external/u-boot - Gitiles

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

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

 static int rk8xx_sysreset_request(struct udevice *dev, enum sysreset_t type)
 {
 	struct rk8xx_priv *priv = dev_get_priv(dev->parent);

 	if (type != SYSRESET_POWER_OFF)
 		return -EPROTONOSUPPORT;

 	switch (priv->variant) {
 	case RK805_ID:
 	case RK808_ID:
 	case RK816_ID:
 	case RK818_ID:
 		pmic_clrsetbits(dev->parent, REG_DEVCTRL, 0, BIT(0));
 		break;
 	case RK809_ID:
 	case RK817_ID:
 		pmic_clrsetbits(dev->parent, RK817_REG_SYS_CFG3, 0,
 				BIT(0));
 		break;
 	default:
 		printf("Unknown PMIC RK%x: Cannot shutdown\n",
 		       priv->variant);
 		return -EPROTONOSUPPORT;
 	};

 	return -EINPROGRESS;
 }

 static struct sysreset_ops rk8xx_sysreset_ops = {
 	.request	= rk8xx_sysreset_request,
 };

 U_BOOT_DRIVER(rk8xx_sysreset) = {
 	.name		= "rk8xx_sysreset",
 	.id		= UCLASS_SYSRESET,
 	.ops		= &rk8xx_sysreset_ops,
 };

 /* In the event of a plug-in and the appropriate option has been
  * selected, we simply shutdown instead of continue the normal boot
  * process. Please note the rk808 is not supported as it doesn't
  * have the appropriate register.
  */
 void rk8xx_off_for_plugin(struct udevice *dev)
 {
 	struct rk8xx_priv *priv = dev_get_priv(dev);

 	switch (priv->variant) {
 	case RK805_ID:
 	case RK816_ID:
 	case RK818_ID:
 		if (pmic_reg_read(dev, RK8XX_ON_SOURCE) & RK8XX_ON_PLUG_IN) {
 			printf("Power Off due to plug-in event\n");
 			pmic_clrsetbits(dev, REG_DEVCTRL, 0, BIT(0));
 		}
 		break;
 	case RK809_ID:
 	case RK817_ID:
 		if (pmic_reg_read(dev, RK817_ON_SOURCE) & RK8XX_ON_PLUG_IN) {
 			printf("Power Off due to plug-in event\n");
 			pmic_clrsetbits(dev, RK817_REG_SYS_CFG3, 0,
 					BIT(0));
 		}
 		break;
 	default:
 		printf("PMIC RK%x: Cannot read boot reason.\n",
 		       priv->variant);
 	}
 }

 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, ret;

 	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);

 	if (CONFIG_IS_ENABLED(SYSRESET)) {
 		ret = device_bind_driver_to_node(dev, "rk8xx_sysreset",
 						 "rk8xx_sysreset",
 						 dev_ofnode(dev), NULL);
 		if (ret)
 			return ret;
 	}

 	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");
 	if (CONFIG_IS_ENABLED(ROCKCHIP_RK8XX_DISABLE_BOOT_ON_POWERON))
 		rk8xx_off_for_plugin(dev);

 	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(rockchip_rk805) = {
 	.name = "rockchip_rk805",
 	.id = UCLASS_PMIC,
 	.of_match = rk8xx_ids,
 #if CONFIG_IS_ENABLED(PMIC_CHILDREN)
 	.bind = rk8xx_bind,
 #endif
 	.priv_auto	  = sizeof(struct rk8xx_priv),
 	.probe = rk8xx_probe,
 	.ops = &rk8xx_ops,
 };

 DM_DRIVER_ALIAS(rockchip_rk805, rockchip_rk808)
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2015 Google, Inc
	* Written by Simon Glass <sjg@chromium.org>
	*/

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

	static int rk8xx_sysreset_request(struct udevice *dev, enum sysreset_t type)
	{
	struct rk8xx_priv *priv = dev_get_priv(dev->parent);

	if (type != SYSRESET_POWER_OFF)
	return -EPROTONOSUPPORT;

	switch (priv->variant) {
	case RK805_ID:
	case RK808_ID:
	case RK816_ID:
	case RK818_ID:
	pmic_clrsetbits(dev->parent, REG_DEVCTRL, 0, BIT(0));
	break;
	case RK809_ID:
	case RK817_ID:
	pmic_clrsetbits(dev->parent, RK817_REG_SYS_CFG3, 0,
	BIT(0));
	break;
	default:
	printf("Unknown PMIC RK%x: Cannot shutdown\n",
	priv->variant);
	return -EPROTONOSUPPORT;
	};

	return -EINPROGRESS;
	}

	static struct sysreset_ops rk8xx_sysreset_ops = {
	.request = rk8xx_sysreset_request,
	};

	U_BOOT_DRIVER(rk8xx_sysreset) = {
	.name = "rk8xx_sysreset",
	.id = UCLASS_SYSRESET,
	.ops = &rk8xx_sysreset_ops,
	};

	/* In the event of a plug-in and the appropriate option has been
	* selected, we simply shutdown instead of continue the normal boot
	* process. Please note the rk808 is not supported as it doesn't
	* have the appropriate register.
	*/
	void rk8xx_off_for_plugin(struct udevice *dev)
	{
	struct rk8xx_priv *priv = dev_get_priv(dev);

	switch (priv->variant) {
	case RK805_ID:
	case RK816_ID:
	case RK818_ID:
	if (pmic_reg_read(dev, RK8XX_ON_SOURCE) & RK8XX_ON_PLUG_IN) {
	printf("Power Off due to plug-in event\n");
	pmic_clrsetbits(dev, REG_DEVCTRL, 0, BIT(0));
	}
	break;
	case RK809_ID:
	case RK817_ID:
	if (pmic_reg_read(dev, RK817_ON_SOURCE) & RK8XX_ON_PLUG_IN) {
	printf("Power Off due to plug-in event\n");
	pmic_clrsetbits(dev, RK817_REG_SYS_CFG3, 0,
	BIT(0));
	}
	break;
	default:
	printf("PMIC RK%x: Cannot read boot reason.\n",
	priv->variant);
	}
	}

	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, ret;

	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);

	if (CONFIG_IS_ENABLED(SYSRESET)) {
	ret = device_bind_driver_to_node(dev, "rk8xx_sysreset",
	"rk8xx_sysreset",
	dev_ofnode(dev), NULL);
	if (ret)
	return ret;
	}

	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");
	if (CONFIG_IS_ENABLED(ROCKCHIP_RK8XX_DISABLE_BOOT_ON_POWERON))
	rk8xx_off_for_plugin(dev);

	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(rockchip_rk805) = {
	.name = "rockchip_rk805",
	.id = UCLASS_PMIC,
	.of_match = rk8xx_ids,
	#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
	.bind = rk8xx_bind,
	#endif
	.priv_auto = sizeof(struct rk8xx_priv),
	.probe = rk8xx_probe,
	.ops = &rk8xx_ops,
	};

	DM_DRIVER_ALIAS(rockchip_rk805, rockchip_rk808)