[PATCH 0/3] SHIFT 6MQ SD-card support, improved responsivness of touchscreen, and codec

[PATCH 0/3] SHIFT 6MQ SD-card support, improved responsivness of touchscreen, and codec

[David Heidelberg via B4 Relay]

I've tested that SD card and touchscreen works well, the codec does too,
but for complete enablement needs soundcard support which isn't fully
finished.

Signed-off-by: David Heidelberg <david@ixit.cz>
---
Alexander Martinz (1):
      arm64: dts: qcom: sdm845-shift-axolotl: Enable TFA9890 codec

Casey Connolly (2):
      arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard
      arm64: dts: qcom: sdm845-shift-axolotl: Set higher touchscreen i2c clock

 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 58 +++++++++++++++++++++++
 1 file changed, 58 insertions(+)
---
base-commit: 785f0eb2f85decbe7c1ef9ae922931f0194ffc2e
change-id: 20260320-axolotl-misc-p1-601d480c25df

Best regards,
-- 
David Heidelberg <david@ixit.cz>

[PATCH 1/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard

[David Heidelberg via B4 Relay]

From: Casey Connolly <casey.connolly@linaro.org>

The SHIFT6mq features an sdcard slot, add it.

Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 43 +++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index 51b041f91d3e2..1f21da310b762 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -600,6 +600,23 @@ &qupv3_id_1 {
 	status = "okay";
 };
 
+&sdhc_2 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdc2_default_state &sdc2_card_det_n>;
+
+	vmmc-supply = <&vreg_l21a_2p95>;
+	vqmmc-supply = <&vreg_l13a_2p95>;
+
+	bus-width = <4>;
+	/* card detection is broken, but because the battery must be removed
+	 * to insert the card, we use this rather than the broken-cd property
+	 * which would just waste CPU cycles polling.
+	 */
+	non-removable;
+};
+
 &slpi_pas {
 	firmware-name = "qcom/sdm845/SHIFT/axolotl/slpi.mbn";
 
@@ -609,6 +626,32 @@ &slpi_pas {
 &tlmm {
 	gpio-reserved-ranges = <0 4>, <81 4>;
 
+	sdc2_default_state: sdc2-default-state {
+		clk-pins {
+			pins = "sdc2_clk";
+			bias-disable;
+			drive-strength = <16>;
+		};
+
+		cmd-pins {
+			pins = "sdc2_cmd";
+			bias-pull-up;
+			drive-strength = <10>;
+		};
+
+		data-pins {
+			pins = "sdc2_data";
+			bias-pull-up;
+			drive-strength = <10>;
+		};
+	};
+
+	sdc2_card_det_n: sd-card-det-n-state {
+		pins = "gpio126";
+		function = "gpio";
+		bias-pull-up;
+	};
+
 	sde_dsi_active: sde-dsi-active-state {
 		pins = "gpio6", "gpio11";
 		function = "gpio";

-- 
2.53.0

Re: [PATCH 1/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard

[Casey Connolly]

Hi David,

On 20/03/2026 17:29, David Heidelberg via B4 Relay wrote:
> From: Casey Connolly <casey.connolly@linaro.org>
> 
> The SHIFT6mq features an sdcard slot, add it.
> 
> Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---
>  arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 43 +++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> index 51b041f91d3e2..1f21da310b762 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> +++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> @@ -600,6 +600,23 @@ &qupv3_id_1 {
>  	status = "okay";
>  };
>  
> +&sdhc_2 {
> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sdc2_default_state &sdc2_card_det_n>;
> +
> +	vmmc-supply = <&vreg_l21a_2p95>;
> +	vqmmc-supply = <&vreg_l13a_2p95>;
> +
> +	bus-width = <4>;
> +	/* card detection is broken, but because the battery must be removed
> +	 * to insert the card, we use this rather than the broken-cd property
> +	 * which would just waste CPU cycles polling.
> +	 */
> +	non-removable;
> +};
> +
>  &slpi_pas {
>  	firmware-name = "qcom/sdm845/SHIFT/axolotl/slpi.mbn";
>  
> @@ -609,6 +626,32 @@ &slpi_pas {
>  &tlmm {
>  	gpio-reserved-ranges = <0 4>, <81 4>;
>  
> +	sdc2_default_state: sdc2-default-state {
> +		clk-pins {
> +			pins = "sdc2_clk";
> +			bias-disable;
> +			drive-strength = <16>;
> +		};
> +
> +		cmd-pins {
> +			pins = "sdc2_cmd";
> +			bias-pull-up;
> +			drive-strength = <10>;
> +		};
> +
> +		data-pins {
> +			pins = "sdc2_data";
> +			bias-pull-up;
> +			drive-strength = <10>;
> +		};
> +	};
> +
> +	sdc2_card_det_n: sd-card-det-n-state {
> +		pins = "gpio126";
> +		function = "gpio";
> +		bias-pull-up;

This can probably be bias-disable I guess, not that it likely matters in
practise.

> +	};
> +
>  	sde_dsi_active: sde-dsi-active-state {
>  		pins = "gpio6", "gpio11";
>  		function = "gpio";
> 

-- 
// Casey (she/her)

Re: [PATCH 1/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard

[David Heidelberg]

On 20/03/2026 17:56, Casey Connolly wrote:

[...]

>> +	sdc2_card_det_n: sd-card-det-n-state {
>> +		pins = "gpio126";
>> +		function = "gpio";
>> +		bias-pull-up;
> 
> This can probably be bias-disable I guess, not that it likely matters in
> practise.

We could save few uA by just disabling the bias, as the card-det pin is useless 
anyway? Do I get it right?

If yes, I'll switch it.

David

> 
>> +	};
>> +
>>   	sde_dsi_active: sde-dsi-active-state {
>>   		pins = "gpio6", "gpio11";
>>   		function = "gpio";
>>
> 

-- 
David Heidelberg

Re: [PATCH 1/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard

[Casey Connolly]

On 20/03/2026 18:02, David Heidelberg wrote:
> On 20/03/2026 17:56, Casey Connolly wrote:
> 
> [...]
> 
>>> +    sdc2_card_det_n: sd-card-det-n-state {
>>> +        pins = "gpio126";
>>> +        function = "gpio";
>>> +        bias-pull-up;
>>
>> This can probably be bias-disable I guess, not that it likely matters in
>> practise.
> 
> We could save few uA by just disabling the bias, as the card-det pin is
> useless anyway? Do I get it right?

Yeah basically
> 
> If yes, I'll switch it.
> 
> David
> 
>>
>>> +    };
>>> +
>>>       sde_dsi_active: sde-dsi-active-state {
>>>           pins = "gpio6", "gpio11";
>>>           function = "gpio";
>>>
>>
> 

-- 
// Casey (she/her)

Re: [PATCH 1/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable sdcard

[Konrad Dybcio]

On 3/20/26 5:29 PM, David Heidelberg via B4 Relay wrote:
> From: Casey Connolly <casey.connolly@linaro.org>
> 
> The SHIFT6mq features an sdcard slot, add it.
> 
> Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---
>  arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 43 +++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> index 51b041f91d3e2..1f21da310b762 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> +++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
> @@ -600,6 +600,23 @@ &qupv3_id_1 {
>  	status = "okay";
>  };
>  
> +&sdhc_2 {
> +	status = "okay";
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sdc2_default_state &sdc2_card_det_n>;
> +
> +	vmmc-supply = <&vreg_l21a_2p95>;
> +	vqmmc-supply = <&vreg_l13a_2p95>;
> +
> +	bus-width = <4>;
> +	/* card detection is broken, but because the battery must be removed
> +	 * to insert the card, we use this rather than the broken-cd property
> +	 * which would just waste CPU cycles polling.

Since it seems you're going to resend anyway:

/*
 * foo

Konrad

[PATCH 2/3] arm64: dts: qcom: sdm845-shift-axolotl: Set higher touchscreen i2c clock

[David Heidelberg via B4 Relay]

From: Casey Connolly <casey.connolly@linaro.org>

Sets a higher rate than the default for good responsiveness of
touchscreen.

Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index 1f21da310b762..8d4bf858b238b 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -432,6 +432,8 @@ &gpu_zap_shader {
 };
 
 &i2c5 {
+	clock-frequency = <400000>;
+
 	status = "okay";
 
 	touchscreen@38 {

-- 
2.53.0

Re: [PATCH 2/3] arm64: dts: qcom: sdm845-shift-axolotl: Set higher touchscreen i2c clock

[Dmitry Baryshkov]

On Fri, Mar 20, 2026 at 05:29:06PM +0100, David Heidelberg via B4 Relay wrote:
> From: Casey Connolly <casey.connolly@linaro.org>
> 
> Sets a higher rate than the default for good responsiveness of
> touchscreen.
> 
> Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---
>  arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 2 ++
>  1 file changed, 2 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>


-- 
With best wishes
Dmitry

Re: [PATCH 2/3] arm64: dts: qcom: sdm845-shift-axolotl: Set higher touchscreen i2c clock

[Konrad Dybcio]

On 3/20/26 5:29 PM, David Heidelberg via B4 Relay wrote:
> From: Casey Connolly <casey.connolly@linaro.org>
> 
> Sets a higher rate than the default for good responsiveness of
> touchscreen.
> 
> Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---

I assume this is in line with downstream (i.e. you're not trying to make
the panel IC work too hard?)

Konrad

Re: [PATCH 2/3] arm64: dts: qcom: sdm845-shift-axolotl: Set higher touchscreen i2c clock

[David Heidelberg]

On 23/03/2026 10:56, Konrad Dybcio wrote:
> On 3/20/26 5:29 PM, David Heidelberg via B4 Relay wrote:
>> From: Casey Connolly <casey.connolly@linaro.org>
>>
>> Sets a higher rate than the default for good responsiveness of
>> touchscreen.
>>
>> Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
>> Signed-off-by: David Heidelberg <david@ixit.cz>
>> ---
> 
> I assume this is in line with downstream (i.e. you're not trying to make
> the panel IC work too hard?)

When bus frequency is not specified in DTS (which isn't in this case), 
downstream set i2c bus to 400 kHz.

See
https://github.com/SHIFTPHONES/android_kernel_shift_sdm845/blob/lineage/lineage-20/drivers/i2c/busses/i2c-qcom-geni.c#L894

David

> 
> Konrad

-- 
David Heidelberg

Re: [PATCH 2/3] arm64: dts: qcom: sdm845-shift-axolotl: Set higher touchscreen i2c clock

[Konrad Dybcio]

On 3/24/26 12:15 AM, David Heidelberg wrote:
> 
> 
> On 23/03/2026 10:56, Konrad Dybcio wrote:
>> On 3/20/26 5:29 PM, David Heidelberg via B4 Relay wrote:
>>> From: Casey Connolly <casey.connolly@linaro.org>
>>>
>>> Sets a higher rate than the default for good responsiveness of
>>> touchscreen.
>>>
>>> Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
>>> Signed-off-by: David Heidelberg <david@ixit.cz>
>>> ---
>>
>> I assume this is in line with downstream (i.e. you're not trying to make
>> the panel IC work too hard?)
> 
> When bus frequency is not specified in DTS (which isn't in this case), downstream set i2c bus to 400 kHz.
> 
> See
> https://github.com/SHIFTPHONES/android_kernel_shift_sdm845/blob/lineage/lineage-20/drivers/i2c/busses/i2c-qcom-geni.c#L894

OK

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

[PATCH 3/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable TFA9890 codec

[David Heidelberg via B4 Relay]

From: Alexander Martinz <amartinz@shiftphones.com>

Audio amplifier TFA9890 is present on the board.

Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index 8d4bf858b238b..80148ff9c3788 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -459,6 +459,19 @@ &i2c10 {
 	/* SMB1355@0x0C */
 };
 
+&i2c11 {
+	clock-frequency = <400000>;
+
+	status = "okay";
+
+	audio-codec@34 {
+		compatible = "nxp,tfa9890";
+		reg = <0x34>;
+		vddd-supply = <&vreg_s4a_1p8>;
+		#sound-dai-cells = <0>;
+	};
+};
+
 &ipa {
 	qcom,gsi-loader = "self";
 	memory-region = <&ipa_fw_mem>;

-- 
2.53.0

Re: [PATCH 3/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable TFA9890 codec

[Dmitry Baryshkov]

On Fri, Mar 20, 2026 at 05:29:07PM +0100, David Heidelberg via B4 Relay wrote:
> From: Alexander Martinz <amartinz@shiftphones.com>
> 
> Audio amplifier TFA9890 is present on the board.
> 
> Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---
>  arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>


-- 
With best wishes
Dmitry

Re: [PATCH 3/3] arm64: dts: qcom: sdm845-shift-axolotl: Enable TFA9890 codec

[Konrad Dybcio]

On 3/20/26 5:29 PM, David Heidelberg via B4 Relay wrote:
> From: Alexander Martinz <amartinz@shiftphones.com>
> 
> Audio amplifier TFA9890 is present on the board.
> 
> Signed-off-by: Alexander Martinz <amartinz@shiftphones.com>
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad