[Uboot-stm32] [PATCH] ARM: dts: stm32: add reset support to uart nodes on stm32mp15x

[Patrice CHOTARD]

On 7/28/20 4:12 PM, Patrice CHOTARD wrote:
> On 7/6/20 2:48 PM, Patrick Delaunay wrote:
>> STM32 serial IP can be reset via reset controller.
>> Add the support of reset to uart nodes on stm32mp15-u-boot.dtsi,
>> the ad-dons file for U-Boot.
>>
>> This patch fix issues when previous UART configuration, for example
>> done in TF-A or ROM code, is not handled in U-Boot stm32 serial driver
>> init.
>>
>> This reset property won't be not added in Linux kernel device tree
>> as this reset is not used in Linux STM32 serial driver.
>>
>> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
>> ---
>>
>>  arch/arm/dts/stm32mp15-u-boot.dtsi | 32 ++++++++++++++++++++++++++++++
>>  1 file changed, 32 insertions(+)
>>
>> diff --git a/arch/arm/dts/stm32mp15-u-boot.dtsi b/arch/arm/dts/stm32mp15-u-boot.dtsi
>> index 142ad25c43..c463b49dda 100644
>> --- a/arch/arm/dts/stm32mp15-u-boot.dtsi
>> +++ b/arch/arm/dts/stm32mp15-u-boot.dtsi
>> @@ -179,6 +179,38 @@
>>  	compatible = "st,stm32-sdmmc2", "arm,pl18x", "arm,primecell";
>>  };
>>  
>> +&usart1 {
>> +	resets = <&rcc USART1_R>;
>> +};
>> +
>> +&usart2 {
>> +	resets = <&rcc USART2_R>;
>> +};
>> +
>> +&usart3 {
>> +	resets = <&rcc USART3_R>;
>> +};
>> +
>> +&uart4 {
>> +	resets = <&rcc UART4_R>;
>> +};
>> +
>> +&uart5 {
>> +	resets = <&rcc UART5_R>;
>> +};
>> +
>> +&usart6 {
>> +	resets = <&rcc USART6_R>;
>> +};
>> +
>> +&uart7 {
>> +	resets = <&rcc UART7_R>;
>> +};
>> +
>> +&uart8{
>> +	resets = <&rcc UART8_R>;
>> +};
>> +
>>  &usbotg_hs {
>>  	compatible = "st,stm32mp1-hsotg", "snps,dwc2";
>>  };
> Reviewed-by: Patrice Chotard <patrice.chotard at st.com>
>
> Thanks
>
> Patrice
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Applied to u-boot-stm/master

Thanks

Patrice