Hi Sinthu,
On 16/03/23 17:11, Sinthu Raja wrote:
> From: Sinthu Raja <sinthu.raja@xxxxxx>
>
> The size of wkup domain I/O PADCONFIG register set is incorrect for J721S2.
> Therefore, update the PADCONFIG total offset size to the correct value for
> J721S22 SoC.
>
> Fixes: b8545f9d3a54 ("arm64: dts: ti: Add initial support for J721S2 SoC")
> Signed-off-by: Sinthu Raja <sinthu.raja@xxxxxx>
> ---
>
> Changes in V3:
> - Added Fix tag
>
> Changes in V2:
> - Update commit description.
> - Update the offset value to 0x194 because 0x190 is the last register of the
> IO PADCONFIG register set.
>
The existing PADCONFIG register region descriptions in the pinctrl nodes seems
to be incorrect for j721s2-main and j721s2-mcu-wakeup due to non-addressable
holes in the region which causes bus aborts when the registers are read and
causes system crash if we read something like,
/sys/kernel/debug/pinctrl/4301c000.pinctrl-pinctrl-single/pins
This is what I saw from inspection of the datasheet:
* WKUP_PADCONFIG13, WKUP_PADCONFIG25 missing in WKUP_PADCONFIG region
* MAIN_PADCONFIG 64-68 missing in MAIN_PADCONFIG region
I have verified that your patch does not introduce new issues, but since it is a
Fix patch, I will defer the decision to the maintainers on whether we should
split the nodes to avoid non-addressable regions and fix it completely here or
later do a fix for the split.
Thanks and Regards,
Vaishnav
> arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> index 0af242aa9816..b10f1e8b98e6 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-mcu-wakeup.dtsi
> @@ -50,7 +50,7 @@ mcu_ram: sram@41c00000 {
> wkup_pmx0: pinctrl@4301c000 {
> compatible = "pinctrl-single";
> /* Proxy 0 addressing */
> - reg = <0x00 0x4301c000 0x00 0x178>;
> + reg = <0x00 0x4301c000 0x00 0x194>;
> #pinctrl-cells = <1>;
> pinctrl-single,register-width = <32>;
> pinctrl-single,function-mask = <0xffffffff>;
--
Regards,
Vaishnav
