| Message ID | 20210107104915.2888408-3-hsinyi@chromium.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add domain supply for mtk power domains | expand |
On Thu, Jan 7, 2021 at 6:49 PM Hsin-Yi Wang <hsinyi@chromium.org> wrote: > > Some power domains (eg. mfg) needs to turn on power supply before power > on. > > Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> Reviewed-by: Nicolas Boichat <drinkcat@chromium.org> > --- > drivers/soc/mediatek/mt8183-pm-domains.h | 1 + > drivers/soc/mediatek/mtk-pm-domains.c | 36 +++++++++++++++++++++++- > drivers/soc/mediatek/mtk-pm-domains.h | 1 + > 3 files changed, 37 insertions(+), 1 deletion(-) > > diff --git a/drivers/soc/mediatek/mt8183-pm-domains.h b/drivers/soc/mediatek/mt8183-pm-domains.h > index 8d996c5d2682d..aa5230e6c12f8 100644 > --- a/drivers/soc/mediatek/mt8183-pm-domains.h > +++ b/drivers/soc/mediatek/mt8183-pm-domains.h > @@ -38,6 +38,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = { > .ctl_offs = 0x0338, > .sram_pdn_bits = GENMASK(8, 8), > .sram_pdn_ack_bits = GENMASK(12, 12), > + .caps = MTK_SCPD_DOMAIN_SUPPLY, > }, > [MT8183_POWER_DOMAIN_MFG_CORE0] = { > .sta_mask = BIT(7), > diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c > index fb70cb3b07b36..ae255aa7b1a97 100644 > --- a/drivers/soc/mediatek/mtk-pm-domains.c > +++ b/drivers/soc/mediatek/mtk-pm-domains.c [snip] > @@ -275,6 +295,7 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no > { > const struct scpsys_domain_data *domain_data; > struct scpsys_domain *pd; > + struct device_node *np = scpsys->dev->of_node; > struct property *prop; > const char *clk_name; > int i, ret, num_clks; > @@ -307,6 +328,19 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no > pd->data = domain_data; > pd->scpsys = scpsys; > > + if (MTK_SCPD_CAPS(pd, MTK_SCPD_DOMAIN_SUPPLY)) { > + /* Find regulator in current power domain node */ > + scpsys->dev->of_node = node; > + pd->supply = devm_regulator_get(scpsys->dev, "domain"); > + scpsys->dev->of_node = np; This pattern is a bit strange to me. But Hsin-Yi pointed out that there are precedents: https://elixir.bootlin.com/linux/v5.11-rc2/source/drivers/iio/adc/rcar-gyroadc.c#L397 . > + if (IS_ERR(pd->supply)) { > + dev_err_probe(scpsys->dev, PTR_ERR(pd->supply), > + "%pOF: failed to get power supply.\n", > + node); > + return ERR_CAST(pd->supply); > + } > + } > + > pd->infracfg = syscon_regmap_lookup_by_phandle_optional(node, "mediatek,infracfg"); > if (IS_ERR(pd->infracfg)) > return ERR_CAST(pd->infracfg); > diff --git a/drivers/soc/mediatek/mtk-pm-domains.h b/drivers/soc/mediatek/mtk-pm-domains.h > index a2f4d8f97e058..b2770b5266dba 100644 > --- a/drivers/soc/mediatek/mtk-pm-domains.h > +++ b/drivers/soc/mediatek/mtk-pm-domains.h > @@ -7,6 +7,7 @@ > #define MTK_SCPD_FWAIT_SRAM BIT(1) > #define MTK_SCPD_SRAM_ISO BIT(2) > #define MTK_SCPD_KEEP_DEFAULT_OFF BIT(3) > +#define MTK_SCPD_DOMAIN_SUPPLY BIT(4) > #define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x)) > > #define SPM_VDE_PWR_CON 0x0210 > -- > 2.29.2.729.g45daf8777d-goog > > > _______________________________________________ > Linux-mediatek mailing list > Linux-mediatek@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-mediatek
Hi Hsin-Yi, Thank you for the patch. On 10/1/21 2:49, Nicolas Boichat wrote: > On Thu, Jan 7, 2021 at 6:49 PM Hsin-Yi Wang <hsinyi@chromium.org> wrote: >> >> Some power domains (eg. mfg) needs to turn on power supply before power >> on. >> >> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> > > Reviewed-by: Nicolas Boichat <drinkcat@chromium.org> > Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> >> --- >> drivers/soc/mediatek/mt8183-pm-domains.h | 1 + >> drivers/soc/mediatek/mtk-pm-domains.c | 36 +++++++++++++++++++++++- >> drivers/soc/mediatek/mtk-pm-domains.h | 1 + >> 3 files changed, 37 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/soc/mediatek/mt8183-pm-domains.h b/drivers/soc/mediatek/mt8183-pm-domains.h >> index 8d996c5d2682d..aa5230e6c12f8 100644 >> --- a/drivers/soc/mediatek/mt8183-pm-domains.h >> +++ b/drivers/soc/mediatek/mt8183-pm-domains.h >> @@ -38,6 +38,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = { >> .ctl_offs = 0x0338, >> .sram_pdn_bits = GENMASK(8, 8), >> .sram_pdn_ack_bits = GENMASK(12, 12), >> + .caps = MTK_SCPD_DOMAIN_SUPPLY, >> }, >> [MT8183_POWER_DOMAIN_MFG_CORE0] = { >> .sta_mask = BIT(7), >> diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c >> index fb70cb3b07b36..ae255aa7b1a97 100644 >> --- a/drivers/soc/mediatek/mtk-pm-domains.c >> +++ b/drivers/soc/mediatek/mtk-pm-domains.c > [snip] >> @@ -275,6 +295,7 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no >> { >> const struct scpsys_domain_data *domain_data; >> struct scpsys_domain *pd; >> + struct device_node *np = scpsys->dev->of_node; >> struct property *prop; >> const char *clk_name; >> int i, ret, num_clks; >> @@ -307,6 +328,19 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no >> pd->data = domain_data; >> pd->scpsys = scpsys; >> >> + if (MTK_SCPD_CAPS(pd, MTK_SCPD_DOMAIN_SUPPLY)) { >> + /* Find regulator in current power domain node */ >> + scpsys->dev->of_node = node; >> + pd->supply = devm_regulator_get(scpsys->dev, "domain"); >> + scpsys->dev->of_node = np; > > This pattern is a bit strange to me. But Hsin-Yi pointed out that > there are precedents: > https://elixir.bootlin.com/linux/v5.11-rc2/source/drivers/iio/adc/rcar-gyroadc.c#L397 > . nit: Strange to me too. Maybe it needs a better comment/explanation and/or use child/parent as a temporal of_node names to make a bit more readable. Looks like [devm_]regulator_get only accepts a device as argument and will look into child nodes. > >> + if (IS_ERR(pd->supply)) { >> + dev_err_probe(scpsys->dev, PTR_ERR(pd->supply), >> + "%pOF: failed to get power supply.\n", >> + node); >> + return ERR_CAST(pd->supply); >> + } >> + } >> + >> pd->infracfg = syscon_regmap_lookup_by_phandle_optional(node, "mediatek,infracfg"); >> if (IS_ERR(pd->infracfg)) >> return ERR_CAST(pd->infracfg); >> diff --git a/drivers/soc/mediatek/mtk-pm-domains.h b/drivers/soc/mediatek/mtk-pm-domains.h >> index a2f4d8f97e058..b2770b5266dba 100644 >> --- a/drivers/soc/mediatek/mtk-pm-domains.h >> +++ b/drivers/soc/mediatek/mtk-pm-domains.h >> @@ -7,6 +7,7 @@ >> #define MTK_SCPD_FWAIT_SRAM BIT(1) >> #define MTK_SCPD_SRAM_ISO BIT(2) >> #define MTK_SCPD_KEEP_DEFAULT_OFF BIT(3) >> +#define MTK_SCPD_DOMAIN_SUPPLY BIT(4) >> #define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x)) >> >> #define SPM_VDE_PWR_CON 0x0210 >> -- >> 2.29.2.729.g45daf8777d-goog >> >> >> _______________________________________________ >> Linux-mediatek mailing list >> Linux-mediatek@lists.infradead.org >> http://lists.infradead.org/mailman/listinfo/linux-mediatek
diff --git a/drivers/soc/mediatek/mt8183-pm-domains.h b/drivers/soc/mediatek/mt8183-pm-domains.h index 8d996c5d2682d..aa5230e6c12f8 100644 --- a/drivers/soc/mediatek/mt8183-pm-domains.h +++ b/drivers/soc/mediatek/mt8183-pm-domains.h @@ -38,6 +38,7 @@ static const struct scpsys_domain_data scpsys_domain_data_mt8183[] = { .ctl_offs = 0x0338, .sram_pdn_bits = GENMASK(8, 8), .sram_pdn_ack_bits = GENMASK(12, 12), + .caps = MTK_SCPD_DOMAIN_SUPPLY, }, [MT8183_POWER_DOMAIN_MFG_CORE0] = { .sta_mask = BIT(7), diff --git a/drivers/soc/mediatek/mtk-pm-domains.c b/drivers/soc/mediatek/mtk-pm-domains.c index fb70cb3b07b36..ae255aa7b1a97 100644 --- a/drivers/soc/mediatek/mtk-pm-domains.c +++ b/drivers/soc/mediatek/mtk-pm-domains.c @@ -13,6 +13,7 @@ #include <linux/platform_device.h> #include <linux/pm_domain.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> #include <linux/soc/mediatek/infracfg.h> #include "mt8173-pm-domains.h" @@ -40,6 +41,7 @@ struct scpsys_domain { struct clk_bulk_data *subsys_clks; struct regmap *infracfg; struct regmap *smi; + struct regulator *supply; }; struct scpsys { @@ -187,6 +189,16 @@ static int scpsys_bus_protect_disable(struct scpsys_domain *pd) return _scpsys_bus_protect_disable(pd->data->bp_infracfg, pd->infracfg); } +static int scpsys_regulator_enable(struct regulator *supply) +{ + return supply ? regulator_enable(supply) : 0; +} + +static int scpsys_regulator_disable(struct regulator *supply) +{ + return supply ? regulator_disable(supply) : 0; +} + static int scpsys_power_on(struct generic_pm_domain *genpd) { struct scpsys_domain *pd = container_of(genpd, struct scpsys_domain, genpd); @@ -194,10 +206,14 @@ static int scpsys_power_on(struct generic_pm_domain *genpd) bool tmp; int ret; - ret = clk_bulk_enable(pd->num_clks, pd->clks); + ret = scpsys_regulator_enable(pd->supply); if (ret) return ret; + ret = clk_bulk_enable(pd->num_clks, pd->clks); + if (ret) + goto err_reg; + /* subsys power on */ regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_BIT); regmap_set_bits(scpsys->base, pd->data->ctl_offs, PWR_ON_2ND_BIT); @@ -232,6 +248,8 @@ static int scpsys_power_on(struct generic_pm_domain *genpd) clk_bulk_disable(pd->num_subsys_clks, pd->subsys_clks); err_pwr_ack: clk_bulk_disable(pd->num_clks, pd->clks); +err_reg: + scpsys_regulator_disable(pd->supply); return ret; } @@ -267,6 +285,8 @@ static int scpsys_power_off(struct generic_pm_domain *genpd) clk_bulk_disable(pd->num_clks, pd->clks); + scpsys_regulator_disable(pd->supply); + return 0; } @@ -275,6 +295,7 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no { const struct scpsys_domain_data *domain_data; struct scpsys_domain *pd; + struct device_node *np = scpsys->dev->of_node; struct property *prop; const char *clk_name; int i, ret, num_clks; @@ -307,6 +328,19 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no pd->data = domain_data; pd->scpsys = scpsys; + if (MTK_SCPD_CAPS(pd, MTK_SCPD_DOMAIN_SUPPLY)) { + /* Find regulator in current power domain node */ + scpsys->dev->of_node = node; + pd->supply = devm_regulator_get(scpsys->dev, "domain"); + scpsys->dev->of_node = np; + if (IS_ERR(pd->supply)) { + dev_err_probe(scpsys->dev, PTR_ERR(pd->supply), + "%pOF: failed to get power supply.\n", + node); + return ERR_CAST(pd->supply); + } + } + pd->infracfg = syscon_regmap_lookup_by_phandle_optional(node, "mediatek,infracfg"); if (IS_ERR(pd->infracfg)) return ERR_CAST(pd->infracfg); diff --git a/drivers/soc/mediatek/mtk-pm-domains.h b/drivers/soc/mediatek/mtk-pm-domains.h index a2f4d8f97e058..b2770b5266dba 100644 --- a/drivers/soc/mediatek/mtk-pm-domains.h +++ b/drivers/soc/mediatek/mtk-pm-domains.h @@ -7,6 +7,7 @@ #define MTK_SCPD_FWAIT_SRAM BIT(1) #define MTK_SCPD_SRAM_ISO BIT(2) #define MTK_SCPD_KEEP_DEFAULT_OFF BIT(3) +#define MTK_SCPD_DOMAIN_SUPPLY BIT(4) #define MTK_SCPD_CAPS(_scpd, _x) ((_scpd)->data->caps & (_x)) #define SPM_VDE_PWR_CON 0x0210
Some power domains (eg. mfg) needs to turn on power supply before power on. Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org> --- drivers/soc/mediatek/mt8183-pm-domains.h | 1 + drivers/soc/mediatek/mtk-pm-domains.c | 36 +++++++++++++++++++++++- drivers/soc/mediatek/mtk-pm-domains.h | 1 + 3 files changed, 37 insertions(+), 1 deletion(-)