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power: pmic: rk8xx: Support sysreset shutdown method

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Add support for sysreset shutdown for this PMIC. The values were pulled
from the various datasheets, but for now it has only been tested on
the rk817 (for an Odroid Go Advance).

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Chris Morgan 2022-05-27 13:18:19 -05:00 • committed by Kever Yang
parent 348310233d
commit ad607512f5
1 changed files with 49 additions and 1 deletions

50
drivers/power/pmic/rk8xx.c
View file

@ -6,10 +6,50 @@
#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,
};
static struct reg_data rk817_init_reg[] = {
/* enable the under-voltage protection,
@ -61,7 +101,7 @@ static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
static int rk8xx_bind(struct udevice *dev)
{
ofnode regulators_node;
int children;
int children, ret;
regulators_node = dev_read_subnode(dev, "regulators");
if (!ofnode_valid(regulators_node)) {
@ -72,6 +112,14 @@ static int rk8xx_bind(struct udevice *dev)
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);