diff options
| author | Andrew Jeffery | 2022-01-31 13:54:05 +1030 |
|---|---|---|
| committer | Tom Rini | 2022-04-08 15:17:23 -0400 |
| commit | 34be6968c3570d8e03fcafcd60c02f315b8f4602 (patch) | |
| tree | fcf1c015718882b32986a9f650867b6eb4f28722 /drivers/gpio | |
| parent | 965b989fb6cfdca194a65b7bf1f41483afbc2fd0 (diff) | |
gpio: Add gpio_request_by_line_name()
Add support for the upstream gpio-line-names property already described
in the common GPIO binding document[1]. The ability to search for a line
name allows boards to lift the implementation of common GPIO behaviours
away from specific line indexes on a GPIO controller.
[1] https://github.com/devicetree-org/dt-schema/blob/3c35bfee83c2e38e2ae7af5f83eb89ca94a521e8/dtschema/schemas/gpio/gpio.yaml#L17
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-uclass.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c index 125ae53d612..be00a1f7d87 100644 --- a/drivers/gpio/gpio-uclass.c +++ b/drivers/gpio/gpio-uclass.c @@ -1187,6 +1187,32 @@ int gpio_request_by_name(struct udevice *dev, const char *list_name, int index, index, desc, flags, index > 0, NULL); } +int gpio_request_by_line_name(struct udevice *dev, const char *line_name, + struct gpio_desc *desc, int flags) +{ + int ret; + + ret = dev_read_stringlist_search(dev, "gpio-line-names", line_name); + if (ret < 0) + return ret; + + desc->dev = dev; + desc->offset = ret; + desc->flags = 0; + + ret = dm_gpio_request(desc, line_name); + if (ret) { + debug("%s: dm_gpio_requestf failed\n", __func__); + return ret; + } + + ret = dm_gpio_set_dir_flags(desc, flags | desc->flags); + if (ret) + debug("%s: dm_gpio_set_dir failed\n", __func__); + + return ret; +} + int gpio_request_list_by_name_nodev(ofnode node, const char *list_name, struct gpio_desc *desc, int max_count, int flags) |