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soc: rockchip: pm_config: support to enable regulator before sleep

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If we want to enable regulators before system leep, just configure
property "rockchip,regulator-on-before-mem = <xx>, <xx>, <xx>..."
in rockchip-suspend node.

Signed-off-by: XiaoDong Huang <derrick.huang@rock-chips.com>
Change-Id: Ic421498650f0a208a070c8ceacb94f57ed897609
This commit is contained in:
XiaoDong Huang
2024-05-15 10:13:16 +08:00
committed by Finley Xiao
parent 6c3dd070c7
commit d06dc052ef
1 changed files with 69 additions and 0 deletions
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69
drivers/soc/rockchip/rockchip_pm_config.c
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@@ -51,6 +51,11 @@ static struct rk_on_off_regulator_dev_list {
struct regulator_dev *off_reg_list[MAX_ON_OFF_REG_NUM];
} on_off_regs_dev_list[RK_PM_STATE_MAX];
static struct rk_regulator {
const char *name;
struct regulator *reg;
} on_reg_list_before_mem[MAX_ON_OFF_REG_NUM];
/* rk_tag related defines */
#define sleep_tag_next(t) \
((struct rk_sleep_tag *)((__u32 *)(t) + (t)->hdr.size))
@@ -277,6 +282,41 @@ const struct rk_sleep_config *rockchip_get_cur_sleep_config(void)
}
EXPORT_SYMBOL_GPL(rockchip_get_cur_sleep_config);
static int parse_regulator_list(struct platform_device *pdev,
struct device_node *node,
char *prop_name,
struct rk_regulator *reg_list)
{
struct device_node *dn;
struct regulator *reg;
const char *reg_name;
int i, j;
if (of_find_property(node, prop_name, NULL)) {
for (i = 0, j = 0;
(dn = of_parse_phandle(node, prop_name, i)) && j < MAX_ON_OFF_REG_NUM;
i++) {
if (of_property_read_string(dn, "regulator-name", &reg_name) == 0) {
reg = devm_regulator_get(&pdev->dev, reg_name);
if (IS_ERR(reg)) {
dev_err(&pdev->dev, "failed to get regulator %s for %s\n",
reg_name, prop_name);
} else {
reg_list[j].name = reg_name;
reg_list[j].reg = reg;
j++;
}
} else {
dev_err(&pdev->dev, "failed to get regulator-name property in %s\n",
dn->name);
}
of_node_put(dn);
}
}
return 0;
}
static int parse_mcu_sleep_config(struct device_node *node)
{
int ret, cnt;
@@ -535,6 +575,9 @@ static int pm_config_probe(struct platform_device *pdev)
parse_io_config(&pdev->dev);
parse_mcu_sleep_config(node);
parse_regulator_list(pdev, node,
"rockchip,regulator-on-before-mem",
on_reg_list_before_mem);
if (__is_defined(MODULE))
return 0;
@@ -593,8 +636,34 @@ static int pm_config_prepare(struct device *dev)
return 0;
}
static int pm_config_suspend_late(struct device *dev)
{
int i;
for (i = 0; i < MAX_ON_OFF_REG_NUM && on_reg_list_before_mem[i].reg; i++)
if (regulator_enable(on_reg_list_before_mem[i].reg))
dev_err(dev, "fail to enable regulator:%s\n",
on_reg_list_before_mem[i].name);
return 0;
}
static int pm_config_resume_early(struct device *dev)
{
int i;
for (i = 0; i < MAX_ON_OFF_REG_NUM && on_reg_list_before_mem[i].reg; i++)
if (regulator_disable(on_reg_list_before_mem[i].reg))
dev_err(dev, "fail to disable regulator:%s\n",
on_reg_list_before_mem[i].name);
return 0;
}
static const struct dev_pm_ops rockchip_pm_ops = {
.prepare = pm_config_prepare,
.suspend_late = pm_config_suspend_late,
.resume_early = pm_config_resume_early,
};
static struct platform_driver pm_driver = {