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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-12-30 02:00:05 +0900 |
|---|---|---|
| committer | Jaehoon Chung <jh80.chung@samsung.com> | 2018-01-22 14:11:58 +0900 |
| commit | 3ab48f62230b6753bf5535655c40e3b975825bd9 (patch) | |
| tree | 25dcc283624d0cf8ecc1f44ba789f83fbbffd7e1 /include/dm | |
| parent | 557767ed29968af0294e3aae48433e5d5a298e0b (diff) | |
| download | u-boot-3ab48f62230b6753bf5535655c40e3b975825bd9.zip u-boot-3ab48f62230b6753bf5535655c40e3b975825bd9.tar.gz u-boot-3ab48f62230b6753bf5535655c40e3b975825bd9.tar.bz2 | |
dm: add dev_read_u32()
dev_read_u32_default() always returns something even when the property
is missing. So, it is impossible to do nothing in the case. One
solution is to use ofnode_read_u32() instead, but adding dev_read_u32()
will be helpful.
BTW, Linux has an equvalent function, device_property_read_u32();
it is clearer that it reads a property. I cannot understand the
behavior of dev_read_u32() from its name.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'include/dm')
| -rw-r--r-- | include/dm/read.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/dm/read.h b/include/dm/read.h index 8114037..5cacec8 100644 --- a/include/dm/read.h +++ b/include/dm/read.h @@ -46,6 +46,16 @@ static inline bool dev_of_valid(struct udevice *dev) #ifndef CONFIG_DM_DEV_READ_INLINE /** + * dev_read_u32() - read a 32-bit integer from a device's DT property + * + * @dev: device to read DT property from + * @propname: name of the property to read from + * @outp: place to put value (if found) + * @return 0 if OK, -ve on error + */ +int dev_read_u32(struct udevice *dev, const char *propname, u32 *outp); + +/** * dev_read_u32_default() - read a 32-bit integer from a device's DT property * * @dev: device to read DT property from @@ -412,6 +422,12 @@ int dev_read_resource_byname(struct udevice *dev, const char *name, #else /* CONFIG_DM_DEV_READ_INLINE is enabled */ +static inline int dev_read_u32(struct udevice *dev, + const char *propname, u32 *outp) +{ + return ofnode_read_u32(dev_ofnode(dev), propname, outp); +} + static inline int dev_read_u32_default(struct udevice *dev, const char *propname, int def) { |