| Message ID | 20231011090510.114476-2-ychuang570808@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for nuvoton ma35d1 pin control | expand |
On 11/10/2023 11:05, Jacky Huang wrote: > From: Jacky Huang <ychuang3@nuvoton.com> > > Add compatible 'syscon' to the system-management node. Why? Commit msg should answer to this. Best regards, Krzysztof
Dear Krzysztof, Thank you for the review. On 2023/10/13 上午 03:30, Krzysztof Kozlowski wrote: > On 11/10/2023 11:05, Jacky Huang wrote: >> From: Jacky Huang <ychuang3@nuvoton.com> >> >> Add compatible 'syscon' to the system-management node. > Why? Commit msg should answer to this. > > Best regards, > Krzysztof > I added 'syscon' because system control registers are mapped by this driver. The pinctrl driver needs to access the system control registers through 'regmap' with a phandle referring to this node. I will update the commit message to provide a more detailed explanation of its purpose. Best Regards, Jacky Huang
Dear Rob, Thank you for the review. On 2023/10/13 上午 04:39, Rob Herring wrote: > On Wed, Oct 11, 2023 at 09:05:07AM +0000, Jacky Huang wrote: >> From: Jacky Huang <ychuang3@nuvoton.com> >> >> Add compatible 'syscon' to the system-management node. >> >> Signed-off-by: Jacky Huang <ychuang3@nuvoton.com> >> --- >> .../devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml | 3 ++- >> 1 file changed, 2 insertions(+), 1 deletion(-) >> >> diff --git a/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml >> index 34c5c1c08ec1..3ce7dcecd87a 100644 >> --- a/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml >> +++ b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml >> @@ -18,6 +18,7 @@ properties: >> compatible: >> items: >> - const: nuvoton,ma35d1-reset >> + - const: syscon > Presumably you already have a driver for nuvoton,ma35d1-reset, so just > make it create a regmap. I assume this is the reason you want to add > 'syscon'? > > Rob Yes, we have a driver for 'nuvoton,ma35d1-reset' with a register space mapped to the system control registers. The other ma35d1 drivers may also require access to the system control registers. I added 'syscon' to this node so that other drivers can utilize 'regmap' via the phandle of this node. Best Regards, Jacky Huang
diff --git a/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml index 34c5c1c08ec1..3ce7dcecd87a 100644 --- a/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml +++ b/Documentation/devicetree/bindings/reset/nuvoton,ma35d1-reset.yaml @@ -18,6 +18,7 @@ properties: compatible: items: - const: nuvoton,ma35d1-reset + - const: syscon reg: maxItems: 1 @@ -37,7 +38,7 @@ examples: - | system-management@40460000 { - compatible = "nuvoton,ma35d1-reset"; + compatible = "nuvoton,ma35d1-reset", "syscon"; reg = <0x40460000 0x200>; #reset-cells = <1>; };