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| author | Vivek Gautam <vivek.gautam@codeaurora.org> | 2017-01-22 23:02:40 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-25 11:49:39 +0100 |
| commit | fd0c478c0dd800449e2d70025ef742679a16a8de (patch) | |
| tree | e86523b9f86717ce44f515b7ed434646eeebd985 /drivers/nvmem | |
| parent | 29143268ec7d292ae4531bdf8deb6e55239a0051 (diff) | |
| download | talos-obmc-linux-fd0c478c0dd800449e2d70025ef742679a16a8de.tar.gz talos-obmc-linux-fd0c478c0dd800449e2d70025ef742679a16a8de.zip | |
nvmem: core: Allow getting nvmem cell with a NULL cell id
The nvmem cell with a NULL cell name/id should be the one
with no accompanying 'nvmem-cell-names' property, and thus
will be the cell at index 0 in the device tree.
So, we default to index 0 and update the cell index only when
nvmem cell name id exists.
Suggested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
| -rw-r--r-- | drivers/nvmem/core.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 9c0592127d7e..408b521ee520 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -747,7 +747,9 @@ static struct nvmem_cell *nvmem_cell_get_from_list(const char *cell_id) * of_nvmem_cell_get() - Get a nvmem cell from given device node and cell id * * @np: Device tree node that uses the nvmem cell. - * @name: nvmem cell name from nvmem-cell-names property. + * @name: nvmem cell name from nvmem-cell-names property, or NULL + * for the cell at index 0 (the lone cell with no accompanying + * nvmem-cell-names property). * * Return: Will be an ERR_PTR() on error or a valid pointer * to a struct nvmem_cell. The nvmem_cell will be freed by the @@ -760,9 +762,12 @@ struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, struct nvmem_cell *cell; struct nvmem_device *nvmem; const __be32 *addr; - int rval, len, index; + int rval, len; + int index = 0; - index = of_property_match_string(np, "nvmem-cell-names", name); + /* if cell name exists, find index to the name */ + if (name) + index = of_property_match_string(np, "nvmem-cell-names", name); cell_np = of_parse_phandle(np, "nvmem-cells", index); if (!cell_np) |
