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| author | Enric Balletbo i Serra <enric.balletbo@collabora.com> | 2020-11-10 19:13:37 +0300 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2020-11-19 11:30:11 +0300 |
| commit | 86b9d170da98bae13b307d621638954aef645331 (patch) | |
| tree | cb7a380fe18951ff78a319d9845a6d60229b04cb /include/linux/mfd | |
| parent | 3650b228f83adda7e5ee532e2b90429c03f7b9ec (diff) | |
| download | linux-86b9d170da98bae13b307d621638954aef645331.tar.xz | |
mfd: syscon: Add syscon_regmap_lookup_by_phandle_optional() function.
This adds syscon_regmap_lookup_by_phandle_optional() function to get an
optional regmap.
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. This makes error checking simpler when the
regmap phandle is optional.
Suggested-by: Nicolas Boichat <drinkcat@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'include/linux/mfd')
| -rw-r--r-- | include/linux/mfd/syscon.h | 11 |
1 files changed, 11 insertions, 0 deletions
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__ */ |