[v10,07/12] dt-bindings: pwm: pwm-mediatek: add a property "num-pwms"

Commit Message

Sam Shih (史碩三) Sept. 25, 2019, 2:32 p.m. UTC

From: Ryder Lee <[e-mail]>

This adds a property "num-pwms" in example so that we could
specify the number of PWM channels via device tree.

Signed-off-by: Ryder Lee <[e-mail]>
Signed-off-by: Sam Shih <[e-mail]>
Reviewed-by: Matthias Brugger <[e-mail]>
Acked-by: Uwe Kleine-König <[e-mail]>
---
Changes since v10:
1. Follow reviewers's comments:
- derive the number of PWMs from the specific compatible string
2. Add mt7629 pwm description
3. Add mt7628 fixed-clock description

Changes since v6:
Follow reviewers's comments:
- The subject should indicate this is for Mediatek

Changes since v5:
- Add an Acked-by tag
- This file is original v4 patch 5/10
(https://patchwork.kernel.org/patch/11102577/)

---
 Documentation/devicetree/bindings/pwm/pwm-mediatek.txt | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

Comments

Thierry Reding Sept. 25, 2019, 10:50 p.m. UTC | #1

On Wed, Sep 25, 2019 at 10:32:32PM +0800, Sam Shih wrote:
> From: Ryder Lee <[e-mail]>
> 
> This adds a property "num-pwms" in example so that we could
> specify the number of PWM channels via device tree.
> 
> Signed-off-by: Ryder Lee <[e-mail]>
> Signed-off-by: Sam Shih <[e-mail]>
> Reviewed-by: Matthias Brugger <[e-mail]>
> Acked-by: Uwe Kleine-König <[e-mail]>
> ---
> Changes since v10:
> 1. Follow reviewers's comments:
> - derive the number of PWMs from the specific compatible string
[...]
> + - num-pwms: the number of PWM channels.
[...]

Why is num-pwms still there if you derive it from the compatible string?
I guess I must not have made myself clear. Please drop this.

Also, as I mentioned earlier, I've already applied the patches from v9
that were suitable. Please take a look.

Thierry

Patch

diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
index 991728cb46cb..975d7871830d 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
@@ -9,17 +9,20 @@  Required properties:
  - reg: physical base address and length of the controller's registers.
  - #pwm-cells: must be 2. See pwm.txt in this directory for a description of
    the cell format.
- - clocks: phandle and clock specifier of the PWM reference clock.
- - clock-names: must contain the following, except for MT7628 which
-                has no clocks
+ - clocks: One phandle and clock specifier for each entry in the "clock-names"
+           property, Use fixed-clock as dummy clocks for mt7628
+ - clock-names: must contain the following
    - "top": the top clock generator
    - "main": clock used by the PWM core
    - "pwm1-8": the eight per PWM clocks for mt2712
    - "pwm1-6": the six per PWM clocks for mt7622
    - "pwm1-5": the five per PWM clocks for mt7623
+   - "pwm1-4": the four per PWM clocks for mt7628
+   - "pwm1": the PWM1 clock for mt7629
  - pinctrl-names: Must contain a "default" entry.
  - pinctrl-0: One property must exist for each entry in pinctrl-names.
    See pinctrl/pinctrl-bindings.txt for details of the property values.
+ - num-pwms: the number of PWM channels.
 
 Example:
 	pwm0: pwm@11006000 {
@@ -37,4 +40,5 @@  Example:
 			      "pwm3", "pwm4", "pwm5";
 		pinctrl-names = "default";
 		pinctrl-0 = <&pwm0_pins>;
+		num-pwms = <5>;
 	};