linux-kernel - Re: [PATCH 2/2] arm64: dts: ti: k3-j7200-common-proc-board: Correct the name of io expander on main

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Date:   Fri, 20 Nov 2020 09:07:32 +0200
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     Vignesh Raghavendra <vigneshr@...com>, <nm@...com>,
        <t-kristo@...com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <nsekhar@...com>
Subject: Re: [PATCH 2/2] arm64: dts: ti: k3-j7200-common-proc-board: Correct
 the name of io expander on main_i2c1



On 19/11/2020 18.10, Vignesh Raghavendra wrote:
> 
> 
> On 11/19/20 6:56 PM, Peter Ujfalusi wrote:
>> J7200 main_i2c1 is connected to the i2c bus on the CPB marked as main_i2c3
>>
>> The i2c1 devices on the CPB are _not_ connected to the SoC, they are not
>> usable with the J7200 SOM.
>>
>> Correct the expander name from exp4 to exp3 and at the same time add the
>> line names as well.
>>
>> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
>> ---
> 
> Yes, the schematics call this expander as exp3. Thanks for the fix

The CPB is the same for both j721e and j7200 SOMs.
I'll send v2 with a small comment block to explain this.

> Reviewed-by: Vignesh Raghavendra <vigneshr@...com>
> 
>>  arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts | 5 ++++-
>>  1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
>> index 2721137d8943..83e043c65f81 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
>> +++ b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
>> @@ -159,11 +159,14 @@ &main_i2c1 {
>>  	pinctrl-0 = <&main_i2c1_pins_default>;
>>  	clock-frequency = <400000>;
>>  
>> -	exp4: gpio@20 {
>> +	exp3: gpio@20 {
>>  		compatible = "ti,tca6408";
>>  		reg = <0x20>;
>>  		gpio-controller;
>>  		#gpio-cells = <2>;
>> +		gpio-line-names = "CODEC_RSTz", "CODEC_SPARE1", "UB926_RESETn",
>> +				  "UB926_LOCK", "UB926_PWR_SW_CNTRL",
>> +				  "UB926_TUNER_RESET", "UB926_GPIO_SPARE", "";
> 
> I assume these lines have same meaning in J721e and J7200? If so, then
> no issues.
> 
>>  	};
>>  };
>>  
>>

- Péter

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