linux-kernel - Re: [PATCH] arm64: dts: qcom: ipq9574: enable the SPI NOR support in RDP433

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Date:   Wed, 14 Jun 2023 12:38:25 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Kathiravan T <quic_kathirav@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: ipq9574: enable the SPI NOR support in
 RDP433



On 14.06.2023 12:34, Kathiravan T wrote:
> 
> On 6/14/2023 12:02 PM, Kathiravan T wrote:
>>
>> On 6/9/2023 2:37 PM, Konrad Dybcio wrote:
>>>
>>> On 9.06.2023 10:15, Kathiravan T wrote:
>>>> RDP433 has the support for SPI NOR, add the support for it.
>>>>
>>>> Signed-off-by: Kathiravan T <quic_kathirav@...cinc.com>
>>>> ---
>>>> Note: This patch was part of initial submission
>>>> https://lore.kernel.org/linux-arm-msm/20230329053726.14860-1-quic_kathirav@quicinc.com/
>>>> however this got missed in between, so sending it across again.
>>>>
>>>>   arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts | 21 +++++++++++++++++++++
>>>>   1 file changed, 21 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts b/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
>>>> index 2b3ed8d351f7..31ee19112157 100644
>>>> --- a/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
>>>> +++ b/arch/arm64/boot/dts/qcom/ipq9574-rdp433.dts
>>>> @@ -48,6 +48,20 @@
>>>>       };
>>>>   };
>>>>   +&blsp1_spi0 {
>>>> +    pinctrl-0 = <&spi_0_pins>;
>>>> +    pinctrl-names = "default";
>>>> +    status = "okay";
>>>> +
>>>> +    flash@0 {
>>>> +        compatible = "micron,n25q128a11", "jedec,spi-nor";
>>>> +        reg = <0>;
>>>> +        #address-cells = <1>;
>>>> +        #size-cells = <1>;
>>> If you're not adding a partition table, you can drop the address-
>>> and size-cells properties, as they determine what the reg value of
>>> the child looks like.
>>
>>
>> Sorry, somehow I missed this query. Will check and update it.
> 
> 
> Currently IPQ boot loaders patches the partition information into the SPI node. To parse that, we need the address-cells and size-cells properties.
Please consult adding these properties if they're not found with the
bootloader team using libfdt calls from there. All bl changes should
be self-contained.

I understand it won't be possible for released products, but hopefully
this could change for the next ones.

Konrad
> 
> Also, this patch is now integrated into the below series
> 
> https://lore.kernel.org/linux-arm-msm/20230614085040.22071-1-quic_anusha@quicinc.com/T/#t
> 
> 
> Thanks,
> 
> 
>>
>>
>>>
>>> Konrad
>>>> +        spi-max-frequency = <50000000>;
>>>> +    };
>>>> +};
>>>> +
>>>>   &sdhc_1 {
>>>>       pinctrl-0 = <&sdc_default_state>;
>>>>       pinctrl-names = "default";
>>>> @@ -96,6 +110,13 @@
>>>>               bias-pull-down;
>>>>           };
>>>>       };
>>>> +
>>>> +    spi_0_pins: spi-0-state {
>>>> +        pins = "gpio11", "gpio12", "gpio13", "gpio14";
>>>> +        function = "blsp0_spi";
>>>> +        drive-strength = <8>;
>>>> +        bias-disable;
>>>> +    };
>>>>   };
>>>>     &xo_board_clk {