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authorSascha Hauer <s.hauer@pengutronix.de>2015-11-30 11:41:40 +0100
committerMatthias Brugger <matthias.bgg@gmail.com>2015-12-18 09:41:42 +0100
commit4688f3856dc1a739ef8a1063abf1e91a657db251 (patch)
treec3db87ac46e0d5f6185da130da96d15632f4356f /drivers/soc
parent8005c49d9aea74d382f474ce11afbbc7d7130bec (diff)
downloadlinux-4688f3856dc1a739ef8a1063abf1e91a657db251.tar.bz2
soc: mediatek: SCPSYS: Add regulator support
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. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Diffstat (limited to 'drivers/soc')
-rw-r--r--drivers/soc/mediatek/mtk-scpsys.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index 4d4203c896c4..e4256190bab5 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -21,6 +21,7 @@
#include <linux/pm_domain.h>
#include <linux/regmap.h>
#include <linux/soc/mediatek/infracfg.h>
+#include <linux/regulator/consumer.h>
#include <dt-bindings/power/mt8173-power.h>
#define SPM_VDE_PWR_CON 0x0210
@@ -179,6 +180,7 @@ struct scp_domain {
u32 sram_pdn_ack_bits;
u32 bus_prot_mask;
bool active_wakeup;
+ struct regulator *supply;
};
struct scp {
@@ -221,6 +223,12 @@ static int scpsys_power_on(struct generic_pm_domain *genpd)
int ret;
int i;
+ if (scpd->supply) {
+ ret = regulator_enable(scpd->supply);
+ if (ret)
+ return ret;
+ }
+
for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++) {
ret = clk_prepare_enable(scpd->clk[i]);
if (ret) {
@@ -299,6 +307,9 @@ err_pwr_ack:
clk_disable_unprepare(scpd->clk[i]);
}
err_clk:
+ if (scpd->supply)
+ regulator_disable(scpd->supply);
+
dev_err(scp->dev, "Failed to power on domain %s\n", genpd->name);
return ret;
@@ -379,6 +390,9 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
for (i = 0; i < MAX_CLKS && scpd->clk[i]; i++)
clk_disable_unprepare(scpd->clk[i]);
+ if (scpd->supply)
+ regulator_disable(scpd->supply);
+
return 0;
out:
@@ -448,6 +462,19 @@ static int __init scpsys_probe(struct platform_device *pdev)
return PTR_ERR(scp->infracfg);
}
+ for (i = 0; i < NUM_DOMAINS; i++) {
+ struct scp_domain *scpd = &scp->domains[i];
+ const struct scp_domain_data *data = &scp_domain_data[i];
+
+ scpd->supply = devm_regulator_get_optional(&pdev->dev, data->name);
+ if (IS_ERR(scpd->supply)) {
+ if (PTR_ERR(scpd->supply) == -ENODEV)
+ scpd->supply = NULL;
+ else
+ return PTR_ERR(scpd->supply);
+ }
+ }
+
pd_data->num_domains = NUM_DOMAINS;
for (i = 0; i < NUM_DOMAINS; i++) {