diff options
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/mfd/syscon.c | 18 | ||||
| -rw-r--r-- | drivers/soc/mediatek/mtk-scpsys.c | 5 | ||||
| -rw-r--r-- | include/linux/mfd/syscon.h | 11 |
4 files changed, 33 insertions, 3 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index e73636b75f29..0e1289658d55 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2067,7 +2067,7 @@ M: Matthias Brugger <matthias.bgg@gmail.com> L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) L: linux-mediatek@lists.infradead.org (moderated for non-subscribers) S: Maintained -W: https://mtk.bcnfs.org/ +W: https://mtk.wiki.kernel.org/ C: irc://chat.freenode.net/linux-mediatek F: arch/arm/boot/dts/mt6* F: arch/arm/boot/dts/mt7* diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c index ca465794ea9c..c6f139b2e0c0 100644 --- a/drivers/mfd/syscon.c +++ b/drivers/mfd/syscon.c @@ -255,6 +255,24 @@ struct regmap *syscon_regmap_lookup_by_phandle_args(struct device_node *np, } EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_phandle_args); +/* + * It behaves the same as syscon_regmap_lookup_by_phandle() except where + * there is no regmap phandle. In this case, instead of returning -ENODEV, + * the function returns NULL. + */ +struct regmap *syscon_regmap_lookup_by_phandle_optional(struct device_node *np, + const char *property) +{ + struct regmap *regmap; + + regmap = syscon_regmap_lookup_by_phandle(np, property); + if (IS_ERR(regmap) && PTR_ERR(regmap) == -ENODEV) + return NULL; + + return regmap; +} +EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_phandle_optional); + static int syscon_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c index f669d3754627..ca75b14931ec 100644 --- a/drivers/soc/mediatek/mtk-scpsys.c +++ b/drivers/soc/mediatek/mtk-scpsys.c @@ -524,6 +524,7 @@ static void mtk_register_power_domains(struct platform_device *pdev, for (i = 0; i < num; i++) { struct scp_domain *scpd = &scp->domains[i]; struct generic_pm_domain *genpd = &scpd->genpd; + bool on; /* * Initially turn on all domains to make the domains usable @@ -531,9 +532,9 @@ static void mtk_register_power_domains(struct platform_device *pdev, * software. The unused domains will be switched off during * late_init time. */ - genpd->power_on(genpd); + on = !WARN_ON(genpd->power_on(genpd) < 0); - pm_genpd_init(genpd, NULL, false); + pm_genpd_init(genpd, NULL, !on); } /* diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h index 7f20e9b502a5..fecc2fa2a364 100644 --- a/include/linux/mfd/syscon.h +++ b/include/linux/mfd/syscon.h @@ -28,6 +28,9 @@ extern struct regmap *syscon_regmap_lookup_by_phandle_args( const char *property, int arg_count, unsigned int *out_args); +extern struct regmap *syscon_regmap_lookup_by_phandle_optional( + struct device_node *np, + const char *property); #else static inline struct regmap *device_node_to_regmap(struct device_node *np) { @@ -59,6 +62,14 @@ static inline struct regmap *syscon_regmap_lookup_by_phandle_args( { return ERR_PTR(-ENOTSUPP); } + +static inline struct regmap *syscon_regmap_lookup_by_phandle_optional( + struct device_node *np, + const char *property) +{ + return NULL; +} + #endif #endif /* __LINUX_MFD_SYSCON_H__ */ |