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soc: rockchip: power-domain: Add regulator support

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The power domains are supplied by regulators. Add support for them so
that the regulators are properly turned on before a domain is powered up
and turned off when a domain is powered down.

Change-Id: I43ad569e1b82a8e818cbbf2ffcfa6a965d993bbf
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
This commit is contained in:
Elaine Zhang
2018-10-16 15:26:42 +08:00
committed by Tao Huang
parent a46d0a350e
commit c31ce8bf63
1 changed files with 20 additions and 0 deletions
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20
drivers/soc/rockchip/pm_domains.c
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@@ -16,6 +16,7 @@
#include <linux/clk.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <linux/regulator/consumer.h>
#include <dt-bindings/power/px30-power.h>
#include <dt-bindings/power/rk1808-power.h>
#include <dt-bindings/power/rk3036-power.h>
@@ -75,6 +76,7 @@ struct rockchip_pm_domain {
struct clk_bulk_data *clks;
bool is_ignore_pwr;
bool is_qos_saved;
struct regulator *supply;
};
struct rockchip_pmu {
@@ -379,6 +381,21 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
mutex_lock(&pmu->mutex);
if (rockchip_pmu_domain_is_on(pd) != power_on) {
if (IS_ERR_OR_NULL(pd->supply) &&
PTR_ERR(pd->supply) != -ENODEV)
pd->supply = devm_regulator_get_optional(pd->pmu->dev,
genpd->name);
if (power_on && !IS_ERR(pd->supply)) {
ret = regulator_enable(pd->supply);
if (ret < 0) {
dev_err(pd->pmu->dev, "failed to set vdd supply enable '%s',\n",
genpd->name);
mutex_unlock(&pmu->mutex);
return ret;
}
}
ret = clk_bulk_enable(pd->num_clks, pd->clks);
if (ret < 0) {
dev_err(pmu->dev, "failed to enable clocks\n");
@@ -421,6 +438,9 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
out:
clk_bulk_disable(pd->num_clks, pd->clks);
if (!power_on && !IS_ERR(pd->supply))
ret = regulator_disable(pd->supply);
}
mutex_unlock(&pmu->mutex);