| Message ID | 20210726111941.1447057-1-wenst@chromium.org |
|---|---|
| State | Accepted |
| Commit | 936c985478716b228f42f47c075d4ea10dfa98bb |
| Headers | show |
| Series | dt-bindings: pinctrl: mt8195: Use real world values for drive-strength arguments | expand |
On Mon, 26 Jul 2021 19:19:41 +0800, Chen-Yu Tsai wrote: > The original binding submission for MT8195 pinctrl described the > possible drive strength values in micro-amps in its description, but > then proceeded to list register values in its device tree binding > constraints. > > However, the macros used with the Mediatek pinctrl bindings directly > specify the drive strength in micro-amps, instead of hardware register > values. The current driver implementation in Linux does convert the > value from micro-amps to hardware register values. This implementation > is also used with MT7622 and MT8183, which use real world values in > their device trees. > > Given the above, it was likely an oversight to use the raw register > values in the binding. Correct the values in the binding. Also drop > the description since the binding combined with its parent, > pinctrl/pincfg.yaml, the binding is now self-describing. > > Fixes: 7f7663899d94 ("dt-bindings: pinctrl: mt8195: add pinctrl file and binding document") > Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> > --- > .../devicetree/bindings/pinctrl/pinctrl-mt8195.yaml | 5 +---- > 1 file changed, 1 insertion(+), 4 deletions(-) > Acked-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml index 2f12ec59eee5..e17a399e0904 100644 --- a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt8195.yaml @@ -80,10 +80,7 @@ patternProperties: as macros in dt-bindings/pinctrl/<soc>-pinfunc.h directly. drive-strength: - description: | - It can support some arguments which is from 0 to 7. It can only support - 2/4/6/8/10/12/14/16mA in mt8195. - enum: [0, 1, 2, 3, 4, 5, 6, 7] + enum: [2, 4, 6, 8, 10, 12, 14, 16] bias-pull-down: true
The original binding submission for MT8195 pinctrl described the possible drive strength values in micro-amps in its description, but then proceeded to list register values in its device tree binding constraints. However, the macros used with the Mediatek pinctrl bindings directly specify the drive strength in micro-amps, instead of hardware register values. The current driver implementation in Linux does convert the value from micro-amps to hardware register values. This implementation is also used with MT7622 and MT8183, which use real world values in their device trees. Given the above, it was likely an oversight to use the raw register values in the binding. Correct the values in the binding. Also drop the description since the binding combined with its parent, pinctrl/pincfg.yaml, the binding is now self-describing. Fixes: 7f7663899d94 ("dt-bindings: pinctrl: mt8195: add pinctrl file and binding document") Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> --- .../devicetree/bindings/pinctrl/pinctrl-mt8195.yaml | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)