[PATCH V2] arm64: dts: qcom: sc7180: SD-card GPIO pin set bias-pull up

[PATCH V2] arm64: dts: qcom: sc7180: SD-card GPIO pin set bias-pull up

[Shaik Sajida Bhanu]

From: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>

On some sc7180 based platforms where external pull is not present on cd-gpio,
this gpio state is getting read as HIGH when sleep config is applied on it.
This is resulting in SDcard rescan after suspend-resume even though SDcard
is not present.

Update cd-gpio sleep config with bais-pull to fix this issue.

Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Signed-off-by: Shaik Sajida Bhanu <sbhanu@codeaurora.org>
---

Changes since V1:
	- Incorporated review comments by Bjorn Andersson.
---
 arch/arm64/boot/dts/qcom/sc7180.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
index d78a066..a3527c3 100644
--- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
@@ -1819,7 +1819,7 @@
 
 				pinconf-sd-cd {
 					pins = "gpio69";
-					bias-disable;
+					bias-pull-up;
 					drive-strength = <2>;
 				};
 			};
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
of Code Aurora Forum, hosted by The Linux Foundation

Re: [PATCH V2] arm64: dts: qcom: sc7180: SD-card GPIO pin set bias-pull up

[Bjorn Andersson]

On Tue 21 Jul 03:44 PDT 2020, Shaik Sajida Bhanu wrote:

> From: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
> 
> On some sc7180 based platforms where external pull is not present on cd-gpio,
> this gpio state is getting read as HIGH when sleep config is applied on it.
> This is resulting in SDcard rescan after suspend-resume even though SDcard
> is not present.
> 

This is exactly why pinconf properties (such as bias, drive-strength)
should be defined in the board specific file.

Please move the "pinconf-sd-cd" node to sc7180-idp.dts.

Regards,
Bjorn

> Update cd-gpio sleep config with bais-pull to fix this issue.
> 
> Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
> Signed-off-by: Shaik Sajida Bhanu <sbhanu@codeaurora.org>
> ---
> 
> Changes since V1:
> 	- Incorporated review comments by Bjorn Andersson.
> ---
>  arch/arm64/boot/dts/qcom/sc7180.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index d78a066..a3527c3 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -1819,7 +1819,7 @@
>  
>  				pinconf-sd-cd {
>  					pins = "gpio69";
> -					bias-disable;
> +					bias-pull-up;
>  					drive-strength = <2>;
>  				};
>  			};
> -- 
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
> of Code Aurora Forum, hosted by The Linux Foundation
>