linux-kernel - Re: [PATCH 2/2] arm64: imx8mp: imx8mp-phycore-som enable spi nor

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Date:   Mon, 8 Mar 2021 10:55:28 +0100
From:   Heiko Schocher <hs@...x.de>
To:     Marco Felsch <m.felsch@...gutronix.de>,
        Teresa Remmet <T.Remmet@...tec.de>
Cc:     "krzk@...nel.org" <krzk@...nel.org>,
        "linux-imx@....com" <linux-imx@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "festevam@...il.com" <festevam@...il.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
Subject: Re: [PATCH 2/2] arm64: imx8mp: imx8mp-phycore-som enable spi nor

Hello Marco,

On 08.03.21 10:28, Marco Felsch wrote:
> On 21-03-08 08:52, Teresa Remmet wrote:
>> Hello Marco,
>>
>> Am Montag, den 08.03.2021, 09:40 +0100 schrieb Marco Felsch:
>>> On 21-03-08 07:40, Heiko Schocher wrote:
>>>> enable the mt25qu256aba spi nor on the imx8mp-phycore-som.
>>>>
>>>> Signed-off-by: Heiko Schocher <hs@...x.de>
>>>> ---
>>>>
>>>>  .../dts/freescale/imx8mp-phycore-som.dtsi     | 27
>>>> +++++++++++++++++++
>>>>  1 file changed, 27 insertions(+)
>>>>
>>>> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi
>>>> b/arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi
>>>> index 44a8c2337cee4..0284e7a5c6bba 100644
>>>> --- a/arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi
>>>> +++ b/arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi
>>>> @@ -65,6 +65,22 @@ ethphy1: ethernet-phy@0 {
>>>>  	};
>>>>  };
>>>>  
>>>> +&flexspi {
>>>> +	pinctrl-names = "default";
>>>> +	pinctrl-0 = <&pinctrl_flexspi0>;
>>>> +	status = "okay";
>>>> +
>>>> +	flash0: mt25qu256aba@0 {
>>>> +		reg = <0>;
>>>> +		#address-cells = <1>;
>>>> +		#size-cells = <1>;
>>>> +		compatible = "jedec,spi-nor";
>>>
>>> Please make the compatible the first property followed by the reg
>>> property. Also you don't need to add the #size-cells and #address-
>>> cells
>>> now since you don't add a child node.
>>
>> but is this not similar to the label here? If you add partitions in the
>> bootloader you need the cells properties?
> 
> If the bootloader will add partitions the bootloader can add the
> size/address-cells too using the phandle. But this is more a nit.

Yes. I personally prefer to pass mtd partitions through kernel commandline.

I will work in your and Teresas comment, thanks!

bye,
Heiko
> 
> Regards,
>   Marco
> 
>> Teresa
>>
>>>
>>> Regards,
>>>   Marco
>>>
>>>> +		spi-max-frequency = <80000000>;
>>>> +		spi-tx-bus-width = <4>;
>>>> +		spi-rx-bus-width = <4>;
>>>> +	};
>>>> +};
>>>> +
>>>>  &i2c1 {
>>>>  	clock-frequency = <400000>;
>>>>  	pinctrl-names = "default";
>>>> @@ -217,6 +233,17 @@ MX8MP_IOMUXC_GPIO1_IO15__GPIO1_IO15		
>>>> 0x11
>>>>  		>;
>>>>  	};
>>>>  
>>>> +	pinctrl_flexspi0: flexspi0grp {
>>>> +		fsl,pins = <
>>>> +			MX8MP_IOMUXC_NAND_ALE__FLEXSPI_A_SCLK		
>>>> 0x1c2
>>>> +			MX8MP_IOMUXC_NAND_CE0_B__FLEXSPI_A_SS0_B	0x8
>>>> 2
>>>> +			MX8MP_IOMUXC_NAND_DATA00__FLEXSPI_A_DATA00	0x8
>>>> 2
>>>> +			MX8MP_IOMUXC_NAND_DATA01__FLEXSPI_A_DATA01	0x8
>>>> 2
>>>> +			MX8MP_IOMUXC_NAND_DATA02__FLEXSPI_A_DATA02	0x8
>>>> 2
>>>> +			MX8MP_IOMUXC_NAND_DATA03__FLEXSPI_A_DATA03	0x8
>>>> 2
>>>> +		>;
>>>> +	};
>>>> +
>>>>  	pinctrl_i2c1: i2c1grp {
>>>>  		fsl,pins = <
>>>>  			MX8MP_IOMUXC_I2C1_SCL__I2C1_SCL		0x4
>>>> 00001c3
>>>> -- 
>>>> 2.29.2
>>>>
>>>>
>>>>
> 

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