1. Patchew
  2. linux
  3. [PATCH 0/4] Driver for Apple Z2 touchscreens.
  4. View patch

[PATCH 3/4] arm64: dts: apple: Add touchbar digitizer nodes

Sasha Finkelstein via B4 Relay posted 4 patches 1 year, 2 months ago
There is a newer version of this series
[PATCH 3/4] arm64: dts: apple: Add touchbar digitizer nodes
Posted by Sasha Finkelstein via B4 Relay 1 year, 2 months ago 
From: Sasha Finkelstein <fnkl.kernel@gmail.com>

Adds device tree entries for the touchbar digitizer

Co-developed-by: Janne Grunau <j@jannau.net>
Signed-off-by: Janne Grunau <j@jannau.net>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
---
 arch/arm64/boot/dts/apple/t8103-j293.dts | 24 ++++++++++++++++++++++++
 arch/arm64/boot/dts/apple/t8103.dtsi     | 19 +++++++++++++++++++
 arch/arm64/boot/dts/apple/t8112-j493.dts | 20 ++++++++++++++++++++
 arch/arm64/boot/dts/apple/t8112.dtsi     | 14 ++++++++++++++
 4 files changed, 77 insertions(+)

diff --git a/arch/arm64/boot/dts/apple/t8103-j293.dts b/arch/arm64/boot/dts/apple/t8103-j293.dts
index 56b0c67bfcda321b60c621de092643017693ff91..a1c4e5731f2147121a9845bc9f34d224025fb145 100644
--- a/arch/arm64/boot/dts/apple/t8103-j293.dts
+++ b/arch/arm64/boot/dts/apple/t8103-j293.dts
@@ -28,6 +28,10 @@ led-0 {
 			default-state = "keep";
 		};
 	};
+
+	aliases {
+		touchbar0 = &touchbar0;
+	};
 };
 
 &bluetooth0 {
@@ -38,6 +42,26 @@ &wifi0 {
 	brcm,board-type = "apple,honshu";
 };
 
+&spi0 {
+	status = "okay";
+
+	touchbar0: touchbar@0 {
+		compatible = "apple,j293-touchbar",
+			"apple,z2-touchbar", "apple,z2-multitouch";
+		reg = <0>;
+		spi-max-frequency = <11500000>;
+		spi-cs-setup-delay-ns = <2000>;
+		spi-cs-hold-delay-ns = <2000>;
+		reset-gpios = <&pinctrl_ap 139 GPIO_ACTIVE_LOW>;
+		cs-gpios = <&pinctrl_ap 109 0>;
+		interrupts-extended = <&pinctrl_ap 194 IRQ_TYPE_EDGE_FALLING>;
+		firmware-name = "apple/dfrmtfw-j293.bin";
+		touchscreen-size-x = <23045>;
+		touchscreen-size-y = <640>;
+		label = "MacBookPro17,1 Touch Bar";
+	};
+};
+
 &i2c2 {
 	status = "okay";
 };
diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
index 9b0dad6b618444ac6b1c9735c50cccfc3965f947..dc72aae3844bf33579f623f0b01abc7de4033af4 100644
--- a/arch/arm64/boot/dts/apple/t8103.dtsi
+++ b/arch/arm64/boot/dts/apple/t8103.dtsi
@@ -326,6 +326,13 @@ clkref: clock-ref {
 		clock-output-names = "clkref";
 	};
 
+	clk_200m: clock-200m {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <200000000>;
+		clock-output-names = "clk_200m";
+	};
+
 	/*
 	 * This is a fabulated representation of the input clock
 	 * to NCO since we don't know the true clock tree.
@@ -441,6 +448,18 @@ fpwm1: pwm@235044000 {
 			status = "disabled";
 		};
 
+		spi0: spi@235100000 {
+			compatible = "apple,t8103-spi", "apple,spi";
+			reg = <0x2 0x35100000 0x0 0x4000>;
+			interrupt-parent = <&aic>;
+			interrupts = <AIC_IRQ 614 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clk_200m>;
+			power-domains = <&ps_spi0>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled"; /* only used in J293 */
+		};
+
 		serial0: serial@235200000 {
 			compatible = "apple,s5l-uart";
 			reg = <0x2 0x35200000 0x0 0x1000>;
diff --git a/arch/arm64/boot/dts/apple/t8112-j493.dts b/arch/arm64/boot/dts/apple/t8112-j493.dts
index 0ad908349f55406783942735a2e9dad54cda00ec..03fb711b3a1fa767ba70807a6d3404e4d52eb783 100644
--- a/arch/arm64/boot/dts/apple/t8112-j493.dts
+++ b/arch/arm64/boot/dts/apple/t8112-j493.dts
@@ -20,6 +20,7 @@ / {
 	aliases {
 		bluetooth0 = &bluetooth0;
 		wifi0 = &wifi0;
+		touchbar0 = &touchbar0;
 	};
 
 	led-controller {
@@ -67,3 +68,22 @@ &i2c4 {
 &fpwm1 {
 	status = "okay";
 };
+
+&spi3 {
+	status = "okay";
+
+	touchbar0: touchbar@0 {
+		compatible = "apple,j493-touchbar", "apple,z2-touchbar", "apple,z2-multitouch";
+		reg = <0>;
+		label = "Mac14,7 Touch Bar";
+		spi-max-frequency = <8000000>;
+		spi-cs-setup-delay-ns = <2000>;
+		spi-cs-hold-delay-ns = <2000>;
+
+		reset-gpios = <&pinctrl_ap 170 GPIO_ACTIVE_LOW>;
+		interrupts-extended = <&pinctrl_ap 174 IRQ_TYPE_EDGE_FALLING>;
+		firmware-name = "apple/dfrmtfw-j493.bin";
+		touchscreen-size-x = <23045>;
+		touchscreen-size-y = <640>;
+	};
+};
diff --git a/arch/arm64/boot/dts/apple/t8112.dtsi b/arch/arm64/boot/dts/apple/t8112.dtsi
index 1666e6ab250bc0be9b8318e3c8fc903ccd3f3760..977c1ca5e8c1b566bb3876b6619ea8812b98e072 100644
--- a/arch/arm64/boot/dts/apple/t8112.dtsi
+++ b/arch/arm64/boot/dts/apple/t8112.dtsi
@@ -467,6 +467,20 @@ fpwm1: pwm@235044000 {
 			status = "disabled";
 		};
 
+		spi3: spi@23510c000 {
+			compatible = "apple,t8112-spi", "apple,spi";
+			reg = <0x2 0x3510c000 0x0 0x4000>;
+			interrupt-parent = <&aic>;
+			interrupts = <AIC_IRQ 751 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&clkref>;
+			pinctrl-0 = <&spi3_pins>;
+			pinctrl-names = "default";
+			power-domains = <&ps_spi3>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
 		serial0: serial@235200000 {
 			compatible = "apple,s5l-uart";
 			reg = <0x2 0x35200000 0x0 0x1000>;

-- 
2.47.1
Re: [PATCH 3/4] arm64: dts: apple: Add touchbar digitizer nodes
Posted by Krzysztof Kozlowski 1 year, 2 months ago 
On Tue, Nov 26, 2024 at 09:48:01PM +0100, Sasha Finkelstein wrote:
> Adds device tree entries for the touchbar digitizer
> 
> Co-developed-by: Janne Grunau <j@jannau.net>
> Signed-off-by: Janne Grunau <j@jannau.net>
> Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
> ---
>  arch/arm64/boot/dts/apple/t8103-j293.dts | 24 ++++++++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8103.dtsi     | 19 +++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8112-j493.dts | 20 ++++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8112.dtsi     | 14 ++++++++++++++
>  4 files changed, 77 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/apple/t8103-j293.dts b/arch/arm64/boot/dts/apple/t8103-j293.dts
> index 56b0c67bfcda321b60c621de092643017693ff91..a1c4e5731f2147121a9845bc9f34d224025fb145 100644
> --- a/arch/arm64/boot/dts/apple/t8103-j293.dts
> +++ b/arch/arm64/boot/dts/apple/t8103-j293.dts
> @@ -28,6 +28,10 @@ led-0 {
>  			default-state = "keep";
>  		};
>  	};
> +
> +	aliases {

Do not add nodes to the end, but in appropriate place. Either ordered by
name, as DTS coding style asks, or in logical place matching existing
convention (convention: aliases are always the first node).

> +		touchbar0 = &touchbar0;

Not used, drop.

> +	};
>  };
>  
>  &bluetooth0 {
> @@ -38,6 +42,26 @@ &wifi0 {
>  	brcm,board-type = "apple,honshu";
>  };
>  
> +&spi0 {

Also unusual placement - between 'w' and 'i'... unless you keep here
the second style of sorting (matching DTSI)?

> +	status = "okay";
> +
> +	touchbar0: touchbar@0 {
> +		compatible = "apple,j293-touchbar",
> +			"apple,z2-touchbar", "apple,z2-multitouch";
> +		reg = <0>;
> +		spi-max-frequency = <11500000>;
> +		spi-cs-setup-delay-ns = <2000>;
> +		spi-cs-hold-delay-ns = <2000>;
> +		reset-gpios = <&pinctrl_ap 139 GPIO_ACTIVE_LOW>;
> +		cs-gpios = <&pinctrl_ap 109 0>;

Use proper GPIO flag define.

> +		interrupts-extended = <&pinctrl_ap 194 IRQ_TYPE_EDGE_FALLING>;
> +		firmware-name = "apple/dfrmtfw-j293.bin";
> +		touchscreen-size-x = <23045>;
> +		touchscreen-size-y = <640>;
> +		label = "MacBookPro17,1 Touch Bar";
> +	};
> +};
> +
>  &i2c2 {
>  	status = "okay";
>  };
> diff --git a/arch/arm64/boot/dts/apple/t8103.dtsi b/arch/arm64/boot/dts/apple/t8103.dtsi
> index 9b0dad6b618444ac6b1c9735c50cccfc3965f947..dc72aae3844bf33579f623f0b01abc7de4033af4 100644
> --- a/arch/arm64/boot/dts/apple/t8103.dtsi
> +++ b/arch/arm64/boot/dts/apple/t8103.dtsi
> @@ -326,6 +326,13 @@ clkref: clock-ref {
>  		clock-output-names = "clkref";
>  	};
>  
> +	clk_200m: clock-200m {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <200000000>;
> +		clock-output-names = "clk_200m";
> +	};
> +
>  	/*
>  	 * This is a fabulated representation of the input clock
>  	 * to NCO since we don't know the true clock tree.
> @@ -441,6 +448,18 @@ fpwm1: pwm@235044000 {
>  			status = "disabled";
>  		};
>  
> +		spi0: spi@235100000 {
> +			compatible = "apple,t8103-spi", "apple,spi";
> +			reg = <0x2 0x35100000 0x0 0x4000>;
> +			interrupt-parent = <&aic>;
> +			interrupts = <AIC_IRQ 614 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&clk_200m>;
> +			power-domains = <&ps_spi0>;
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			status = "disabled"; /* only used in J293 */
> +		};
> +
>  		serial0: serial@235200000 {
>  			compatible = "apple,s5l-uart";
>  			reg = <0x2 0x35200000 0x0 0x1000>;
> diff --git a/arch/arm64/boot/dts/apple/t8112-j493.dts b/arch/arm64/boot/dts/apple/t8112-j493.dts
> index 0ad908349f55406783942735a2e9dad54cda00ec..03fb711b3a1fa767ba70807a6d3404e4d52eb783 100644
> --- a/arch/arm64/boot/dts/apple/t8112-j493.dts
> +++ b/arch/arm64/boot/dts/apple/t8112-j493.dts
> @@ -20,6 +20,7 @@ / {
>  	aliases {
>  		bluetooth0 = &bluetooth0;
>  		wifi0 = &wifi0;
> +		touchbar0 = &touchbar0;

Do not add to the end of lists/properties/nodes etc, but keep order,
usually alphabetical.  This avoids conflicts or allows conflicting
series to be still merged.  That's a general rule for most of
development (Makefiles, DTS, Kconfigs, lists in DT bindings).

Best regards,
Krzysztof
Re: [PATCH 3/4] arm64: dts: apple: Add touchbar digitizer nodes
Posted by Sasha Finkelstein 1 year, 2 months ago 
On Wed, 27 Nov 2024 at 09:55, Krzysztof Kozlowski <krzk@kernel.org> wrote:
> > +             touchbar0 = &touchbar0;
>
> Not used, drop.

Used by the bootloader to forward calibration data to the correct node.
Re: [PATCH 3/4] arm64: dts: apple: Add touchbar digitizer nodes
Posted by Krzysztof Kozlowski 1 year, 2 months ago 
On 27/11/2024 11:31, Sasha Finkelstein wrote:
> On Wed, 27 Nov 2024 at 09:55, Krzysztof Kozlowski <krzk@kernel.org> wrote:
>>> +             touchbar0 = &touchbar0;
>>
>> Not used, drop.
> 
> Used by the bootloader to forward calibration data to the correct node.

I suggest document it with a comment, otherwise each undocumented alias
without in-kernel user is a subject of removal later during cleanup.

Best regards,
Krzysztof
Re: [PATCH 3/4] arm64: dts: apple: Add touchbar digitizer nodes
Posted by Janne Grunau 1 year, 2 months ago 
On Tue, Nov 26, 2024 at 09:48:01PM +0100, Sasha Finkelstein via B4 Relay wrote:
> From: Sasha Finkelstein <fnkl.kernel@gmail.com>
> 
> Adds device tree entries for the touchbar digitizer
> 
> Co-developed-by: Janne Grunau <j@jannau.net>
> Signed-off-by: Janne Grunau <j@jannau.net>
> Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
> ---
>  arch/arm64/boot/dts/apple/t8103-j293.dts | 24 ++++++++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8103.dtsi     | 19 +++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8112-j493.dts | 20 ++++++++++++++++++++
>  arch/arm64/boot/dts/apple/t8112.dtsi     | 14 ++++++++++++++

The changes in t8103.dtsi and t8112.dtsi conflict with my "Add Apple SPI
controller and spi-nor dt nodes" in
https://lore.kernel.org/asahi/20241102-asahi-spi-dt-v1-0-7ac44c0a88f9@jannau.net/

I think it makes more sense to add the spi controller nodes in one go
instead of piece by piece based on device support.

Janne

Patchew 2.1-devel-b67e4c2

© 2016 - 2026 Red Hat, Inc.