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 /drivers/core/of_access.c | |
| parent | 70573c6c46be96d2e60497d8484b9afb119da8c1 (diff) | |
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 'drivers/core/of_access.c')
| -rw-r--r-- | drivers/core/of_access.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/core/of_access.c b/drivers/core/of_access.c index 29e705e0b6..8b2ce7a0c2 100644 --- a/drivers/core/of_access.c +++ b/drivers/core/of_access.c @@ -485,6 +485,28 @@ int of_read_u32_array(const struct device_node *np, const char *propname, return 0; } +int of_read_u32_index(const struct device_node *np, const char *propname, + int index, u32 *outp) +{ + const __be32 *val; + + debug("%s: %s: ", __func__, propname); + if (!np) + return -EINVAL; + + val = of_find_property_value_of_size(np, propname, + sizeof(*outp) * (index + 1)); + if (IS_ERR(val)) { + debug("(not found)\n"); + return PTR_ERR(val); + } + + *outp = be32_to_cpup(val + index); + debug("%#x (%d)\n", *outp, *outp); + + return 0; +} + int of_read_u64(const struct device_node *np, const char *propname, u64 *outp) { const __be64 *val; |