linux-kernel - Re: [PATCH v2 1/1] arm64: dts: lx2160a: Fix the compatible string of LX2160A UART

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Date:   Tue, 10 Aug 2021 09:28:05 +0800
From:   "Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>
To:     Leo Li <leoyang.li@....com>, Shawn Guo <shawnguo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Kettenis <mark.kettenis@...all.nl>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/1] arm64: dts: lx2160a: Fix the compatible string of
 LX2160A UART



On 2021/8/10 6:52, Leo Li wrote:
> 
> 
>> -----Original Message-----
>> From: Zhen Lei <thunder.leizhen@...wei.com>
>> Sent: Tuesday, June 15, 2021 8:16 AM
>> To: Shawn Guo <shawnguo@...nel.org>; Leo Li <leoyang.li@....com>; Rob
>> Herring <robh+dt@...nel.org>; Mark Kettenis <mark.kettenis@...all.nl>;
>> devicetree <devicetree@...r.kernel.org>; linux-arm-kernel <linux-arm-
>> kernel@...ts.infradead.org>; linux-kernel <linux-kernel@...r.kernel.org>
>> Cc: Zhen Lei <thunder.leizhen@...wei.com>
>> Subject: [PATCH v2 1/1] arm64: dts: lx2160a: Fix the compatible string of
>> LX2160A UART
>>
>> Mark Kettenis told us that:
>> According to the NXP documentation, the LX2160A has a real PL011 UART.
>>
>> Therefore, rewrite it to the compatible string of pl011. The property "current-
>> speed" specific to "arm,sbsa-uart" is also deleted.
> 
> Sorry that I missed the discussion on the v1.  But looks like this change breaks the LX2160 boot.  The AMBA matching doesn't seem to work.  And the console is not registered correctly.

https://lore.kernel.org/linux-arm-kernel/cba3a29f-92b5-072a-9a27-60240f072dad@huawei.com/

Maybe we should fall back to v1.

> 
> [    0.639055] OF: amba_device_add() failed (-2) for /soc/serial@...0000
> [    0.645612] OF: amba_device_add() failed (-2) for /soc/serial@...0000
> 
>>
>> Suggested-by: Shawn Guo <shawnguo@...nel.org>
>> Suggested-by: Mark Kettenis <mark.kettenis@...all.nl>
>> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
>> ---
>>  arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 12 ++++--------
>>  1 file changed, 4 insertions(+), 8 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
>> b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
>> index c4b1a59ba424..d2e6f7285674 100644
>> --- a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
>> +++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
>> @@ -920,34 +920,30 @@ QORIQ_CLK_PLL_DIV(8)>,
>>  		};
>>
>>  		uart0: serial@...0000 {
>> -			compatible = "arm,sbsa-uart","arm,pl011";
>> +			compatible = "arm,pl011", "arm,primecell";
>>  			reg = <0x0 0x21c0000 0x0 0x1000>;
>>  			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
>> -			current-speed = <115200>;
>>  			status = "disabled";
>>  		};
>>
>>  		uart1: serial@...0000 {
>> -			compatible = "arm,sbsa-uart","arm,pl011";
>> +			compatible = "arm,pl011", "arm,primecell";
>>  			reg = <0x0 0x21d0000 0x0 0x1000>;
>>  			interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
>> -			current-speed = <115200>;
>>  			status = "disabled";
>>  		};
>>
>>  		uart2: serial@...0000 {
>> -			compatible = "arm,sbsa-uart","arm,pl011";
>> +			compatible = "arm,pl011", "arm,primecell";
>>  			reg = <0x0 0x21e0000 0x0 0x1000>;
>>  			interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
>> -			current-speed = <115200>;
>>  			status = "disabled";
>>  		};
>>
>>  		uart3: serial@...0000 {
>> -			compatible = "arm,sbsa-uart","arm,pl011";
>> +			compatible = "arm,pl011", "arm,primecell";
>>  			reg = <0x0 0x21f0000 0x0 0x1000>;
>>  			interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
>> -			current-speed = <115200>;
>>  			status = "disabled";
>>  		};
>>
>> --
>> 2.25.1
>>
> 
> .
>