lkml.org 
[lkml]   [2021]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
SubjectRe: [PATCH 12/13] ARM: dts: stm32: fix DSI port node on STM32MP15
From
Date
Hi,

On 15.04.21 12:10, Alexandre Torgue wrote:
> Running "make dtbs_check W=1", some warnings are reported concerning
> DSI. This patch reorder DSI nodes to avoid:
>
> soc/dsi@5a000000: unnecessary #address-cells/#size-cells without
> "ranges" or child "reg" property

This reverts parts of commit 9c32f980d9 ("ARM: dts: stm32: preset
stm32mp15x video #address- and #size-cells"):

The cell count for address and size is defined by the binding and not
something a board would change. Avoid each board adding this
boilerplate by having the cell size specification in the SoC DTSI.


The DSI can have child nodes with a unit address (e.g. a panel) and ones
without (ports { } container). ports is described in the dtsi, panels are
described in the dts if available.

Apparently, the checker is fine with
ports {
#address-cells = <1>;
#size-cells = <0>;
};

I think my rationale for the patch above was sound, so I think the checker
taking offense at the DSI cells here should be considered a false positive.

Thanks,
Ahmad

>
> Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
>
> diff --git a/arch/arm/boot/dts/stm32mp157.dtsi b/arch/arm/boot/dts/stm32mp157.dtsi
> index 54e73ccea446..c355fcf26ec3 100644
> --- a/arch/arm/boot/dts/stm32mp157.dtsi
> +++ b/arch/arm/boot/dts/stm32mp157.dtsi
> @@ -24,8 +24,6 @@
> clock-names = "pclk", "ref", "px_clk";
> resets = <&rcc DSI_R>;
> reset-names = "apb";
> - #address-cells = <1>;
> - #size-cells = <0>;
> status = "disabled";
>
> ports {
> diff --git a/arch/arm/boot/dts/stm32mp157c-dk2.dts b/arch/arm/boot/dts/stm32mp157c-dk2.dts
> index 19ef475a48fc..763dde1dbbaf 100644
> --- a/arch/arm/boot/dts/stm32mp157c-dk2.dts
> +++ b/arch/arm/boot/dts/stm32mp157c-dk2.dts
> @@ -36,6 +36,8 @@
> &dsi {
> status = "okay";
> phy-dsi-supply = <&reg18>;
> + #address-cells = <1>;
> + #size-cells = <0>;
>
> ports {
> port@0 {
> diff --git a/arch/arm/boot/dts/stm32mp157c-ev1.dts b/arch/arm/boot/dts/stm32mp157c-ev1.dts
> index 6fe5b0fee7c4..4625bb58cc6d 100644
> --- a/arch/arm/boot/dts/stm32mp157c-ev1.dts
> +++ b/arch/arm/boot/dts/stm32mp157c-ev1.dts
> @@ -102,6 +102,8 @@
> &dsi {
> phy-dsi-supply = <&reg18>;
> status = "okay";
> + #address-cells = <1>;
> + #size-cells = <0>;
>
> ports {
> port@0 {
>

--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |

\
 
 \ /
  Last update: 2021-04-15 12:44    [W:0.206 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site