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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
commit03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch)
treefa581f6dc1c0596391690d1f67eceef3af8246dc /drivers/soc/mediatek
parentd4e493caf788ef44982e131ff9c786546904d934 (diff)
Linux-libre 4.5-gnu
Diffstat (limited to 'drivers/soc/mediatek')
-rw-r--r--drivers/soc/mediatek/mtk-scpsys.c32
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index 4d4203c89..0221387e5 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -15,12 +15,13 @@
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
-#include <linux/module.h>
+#include <linux/init.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#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++) {
@@ -521,5 +548,4 @@ static struct platform_driver scpsys_drv = {
.of_match_table = of_match_ptr(of_scpsys_match_tbl),
},
};
-
-module_platform_driver_probe(scpsys_drv, scpsys_probe);
+builtin_platform_driver_probe(scpsys_drv, scpsys_probe);