linux-kernel - Re: [PATCH v2 2/2] arm64: dts: qcom: sa8540p-ride: Document i2c busses

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Date:   Tue, 31 Jan 2023 16:34:01 -0500
From:   Eric Chanudet <echanude@...hat.com>
To:     Andrew Halaney <ahalaney@...hat.com>
Cc:     andersson@...nel.org, agross@...nel.org, konrad.dybcio@...aro.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, bmasney@...hat.com,
        quic_shazhuss@...cinc.com
Subject: Re: [PATCH v2 2/2] arm64: dts: qcom: sa8540p-ride: Document i2c
 busses

On Mon, Jan 30, 2023 at 09:48:23AM -0600, Andrew Halaney wrote:
> It isn't obvious in the current devicetree what is connected. Go ahead
> and document what's on the other end.
> 
> Signed-off-by: Andrew Halaney <ahalaney@...hat.com>
> ---

Reviewed-by: Eric Chanudet <echanude@...hat.com>

> 
> Changes since v1:
> 	* Document i2c12 having a max20411 (Shazad)
> 
> In v1 I said i2c12 was not connected, that's not true though (I just
> have a board schematic which shows it not connected, but it _is_
> connected on the SIP/SOM, which I verified with series [0]).
> 
> I debated waiting for Bjorn to sort out appropriate label names over at
> [0] (and follow suit in a third patch here), but decided to get this
> series out again to clean up the current warnings while that's worked
> out. Once [0] is resubmitted I'll submit a separate patch to enable the
> max20411 on this board as well!
> 
> [0] https://lore.kernel.org/linux-arm-msm/20230130035642.GA464800@hu-bjorande-lv.qualcomm.com/
> 
> Thanks,
> Andrew
> 
>  arch/arm64/boot/dts/qcom/sa8540p-ride.dts | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sa8540p-ride.dts b/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
> index 6ab4b435c49e..8b7555f22528 100644
> --- a/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
> +++ b/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
> @@ -317,6 +317,7 @@ &xo_board_clk {
> 
>  &tlmm {
>  	i2c0_default: i2c0-default-state {
> +		/* To USB7002T-I/KDXVA0 USB hub (SIP1 only) */
>  		pins = "gpio135", "gpio136";
>  		function = "qup0";
>  		drive-strength = <2>;
> @@ -324,6 +325,7 @@ i2c0_default: i2c0-default-state {
>  	};
> 
>  	i2c1_default: i2c1-default-state {
> +		/* To PM40028B-F3EI PCIe switch */
>  		pins = "gpio158", "gpio159";
>  		function = "qup1";
>  		drive-strength = <2>;
> @@ -331,6 +333,7 @@ i2c1_default: i2c1-default-state {
>  	};
> 
>  	i2c12_default: i2c12-default-state {
> +		/* To Maxim max20411 */
>  		pins = "gpio0", "gpio1";
>  		function = "qup12";
>  		drive-strength = <2>;
> @@ -338,6 +341,7 @@ i2c12_default: i2c12-default-state {
>  	};
> 
>  	i2c15_default: i2c15-default-state {
> +		/* To display connector (SIP1 only) */
>  		pins = "gpio36", "gpio37";
>  		function = "qup15";
>  		drive-strength = <2>;
> @@ -345,6 +349,7 @@ i2c15_default: i2c15-default-state {
>  	};
> 
>  	i2c18_default: i2c18-default-state {
> +		/* To ASM330LHH IMU (SIP1 only) */
>  		pins = "gpio66", "gpio67";
>  		function = "qup18";
>  		drive-strength = <2>;
> --
> 2.39.1
> 

-- 
Eric Chanudet