diff options
| author | Mulin Chao <mlchao@nuvoton.com> | 2021-04-07 20:38:00 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-04-23 17:09:31 +0000 |
| commit | f80d511d1059665c5b55e30c7623508dfb938cac (patch) | |
| tree | 3f835daeaa1a7291af99afbd174c78bf5d3871b7 /zephyr/dts/bindings/gpio | |
| parent | db3d48e0025c9b33eca7f3ad5b075d837a202819 (diff) | |
| download | chrome-ec-f80d511d1059665c5b55e30c7623508dfb938cac.tar.gz | |
zephyr: Add unused GPIOs implementation in shimmed gpio driver
This CL adds ununed GPIOs configuration support in shimmed gpio driver.
By adding IO phandles in 'unused-gpios' prop of board device-tree file,
the shimmed driver will configure them one by one (depends on board
circuit or io-pad design in chip) to prevent leakage current and get
better power consumption in the lowest power state.
BUG=b:184783076
BRANCH=none
TEST=zmake testall
Signed-off-by: Mulin Chao <mlchao@nuvoton.com>
Signed-off-by: Wealian Liao <whliao@nuvoton.corp-partner.google.com>
Change-Id: Ia4fe29cc244e27855faa1b57c2d1f8319b1246c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2817141
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Keith Short <keithshort@chromium.org>
Commit-Queue: Keith Short <keithshort@chromium.org>
Diffstat (limited to 'zephyr/dts/bindings/gpio')
| -rw-r--r-- | zephyr/dts/bindings/gpio/unused-gpios.yaml | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/zephyr/dts/bindings/gpio/unused-gpios.yaml b/zephyr/dts/bindings/gpio/unused-gpios.yaml new file mode 100644 index 0000000000..99f649e25e --- /dev/null +++ b/zephyr/dts/bindings/gpio/unused-gpios.yaml @@ -0,0 +1,11 @@ +description: Unused GPIOs node + +compatible: "unused-gpios" + +properties: + unused-gpios: + type: phandle-array + required: true + description: | + A list contains unused GPIOs. The chip vendor needs to configure them for + better power consumption in the lowest power state. |