diff options
| author | Dario Binacchi <dariobin@libero.it> | 2020-03-29 18:04:41 +0200 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2020-04-16 08:07:58 -0600 |
| commit | 4bb7075c830c6f4e4512fe0277ff1f08c5a9e084 (patch) | |
| tree | a1d8d9d36db2c061edd17dadddfed57a4188470e /include/dm/read.h | |
| parent | 70573c6c46be96d2e60497d8484b9afb119da8c1 (diff) | |
| download | u-boot-4bb7075c830c6f4e4512fe0277ff1f08c5a9e084.zip u-boot-4bb7075c830c6f4e4512fe0277ff1f08c5a9e084.tar.gz u-boot-4bb7075c830c6f4e4512fe0277ff1f08c5a9e084.tar.bz2 | |
dm: core: support reading a single indexed u32 value
The patch adds helper functions to allow reading a single indexed u32
value from a device-tree property containing multiple u32 values, that
is an array of integers.
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/dm/read.h')
| -rw-r--r-- | include/dm/read.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/dm/read.h b/include/dm/read.h index da8c7f2..77d3bc8 100644 --- a/include/dm/read.h +++ b/include/dm/read.h @@ -67,6 +67,32 @@ int dev_read_u32_default(const struct udevice *dev, const char *propname, int def); /** + * dev_read_u32_index() - read an indexed 32-bit integer from a device's DT + * property + * + * @dev: device to read DT property from + * @propname: name of the property to read from + * @index: index of the integer to return + * @outp: place to put value (if found) + * @return 0 if OK, -ve on error + */ +int dev_read_u32_index(struct udevice *dev, const char *propname, int index, + u32 *outp); + +/** + * dev_read_u32_index_default() - read an indexed 32-bit integer from a device's + * DT property + * + * @dev: device to read DT property from + * @propname: name of the property to read from + * @index: index of the integer to return + * @def: default value to return if the property has no value + * @return property value, or @def if not found + */ +u32 dev_read_u32_index_default(struct udevice *dev, const char *propname, + int index, u32 def); + +/** * dev_read_s32() - read a signed 32-bit integer from a device's DT property * * @dev: device to read DT property from @@ -621,6 +647,20 @@ static inline int dev_read_u32_default(const struct udevice *dev, return ofnode_read_u32_default(dev_ofnode(dev), propname, def); } +static inline int dev_read_u32_index(struct udevice *dev, + const char *propname, int index, u32 *outp) +{ + return ofnode_read_u32_index(dev_ofnode(dev), propname, index, outp); +} + +static inline u32 dev_read_u32_index_default(struct udevice *dev, + const char *propname, int index, + u32 def) +{ + return ofnode_read_u32_index_default(dev_ofnode(dev), propname, index, + def); +} + static inline int dev_read_s32(const struct udevice *dev, const char *propname, s32 *outp) { |