imx: imx7d-pico-pi: add CPU supply nodes to device tree

Attach sw1a as "cpu-supply" to both CPUs in order to cpufreq driver to
prove successfully.

Signed-off-by: Lech Perczak <lech.perczak@gmail.com>

diff --git a/target/linux/generic/pending-5.15/870-ARM-dts-nxp-imx7d-pico-add-cpu-supply-nodes.patch b/target/linux/generic/pending-5.15/870-ARM-dts-nxp-imx7d-pico-add-cpu-supply-nodes.patch
new file mode 100644 (file)
index 0000000..186b052
--- /dev/null
+++ b/target/linux/generic/pending-5.15/870-ARM-dts-nxp-imx7d-pico-add-cpu-supply-nodes.patch
@@ -0,0 +1,43 @@
+From 89a74fc5d367441bf4912e9158f0640ea3494b9e Mon Sep 17 00:00:00 2001
+From: Lech Perczak <lech.perczak@gmail.com>
+Date: Fri, 17 Nov 2023 21:33:04 +0100
+Subject: [PATCH] ARM: dts: nxp: imx7d-pico: add cpu-supply nodes
+
+The PICO-IMX7D SoM has the usual power supply configuration using
+output sw1a of PF3000 PMIC, which was defined in downstream derivative
+of linux-imx (see link) in the sources for "Android Things" devkit.
+It is required to support CPU frequency scaling.
+
+Map the respective "cpu-supply" nodes of each core to sw1a of the PMIC.
+
+Enabling them causes cpufreq-dt, and imx-thermal drivers to probe
+successfully, and CPU frequency scaling to function.
+
+Link: https://android.googlesource.com/platform/hardware/bsp/kernel/nxp/imx-v4.1/+/o-iot-preview-5/arch/arm/boot/dts/imx7d-pico.dtsi#849
+
+Cc: Fabio Estevam <festevam@gmail.com>
+Cc: Shawn Guo <shawnguo@kernel.org>
+Cc: Sascha Hauer <s.hauer@pengutronix.de>
+
+Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
+---
+ arch/arm/boot/dts/imx7d-pico.dtsi | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+--- a/arch/arm/boot/dts/imx7d-pico.dtsi
++++ b/arch/arm/boot/dts/imx7d-pico.dtsi
+@@ -108,6 +108,14 @@
+       assigned-clock-rates = <0>, <32768>;
+ };
+ 
++&cpu0 {
++      cpu-supply = <&sw1a_reg>;
++};
++
++&cpu1 {
++      cpu-supply = <&sw1a_reg>;
++};
++
+ &ecspi3 {
+       cs-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>;
+       pinctrl-names = "default";

diff --git a/target/linux/generic/pending-6.1/870-ARM-dts-nxp-imx7d-pico-add-cpu-supply-nodes.patch b/target/linux/generic/pending-6.1/870-ARM-dts-nxp-imx7d-pico-add-cpu-supply-nodes.patch
new file mode 100644 (file)
index 0000000..e253893
--- /dev/null
+++ b/target/linux/generic/pending-6.1/870-ARM-dts-nxp-imx7d-pico-add-cpu-supply-nodes.patch
@@ -0,0 +1,43 @@
+From d0562705bcd4cb9849156f095b2af0ec1bb53b56 Mon Sep 17 00:00:00 2001
+From: Lech Perczak <lech.perczak@gmail.com>
+Date: Fri, 17 Nov 2023 21:33:04 +0100
+Subject: [PATCH] ARM: dts: nxp: imx7d-pico: add cpu-supply nodes
+
+The PICO-IMX7D SoM has the usual power supply configuration using
+output sw1a of PF3000 PMIC, which was defined in downstream derivative
+of linux-imx (see link) in the sources for "Android Things" devkit.
+It is required to support CPU frequency scaling.
+
+Map the respective "cpu-supply" nodes of each core to sw1a of the PMIC.
+
+Enabling them causes cpufreq-dt, and imx-thermal drivers to probe
+successfully, and CPU frequency scaling to function.
+
+Link: https://android.googlesource.com/platform/hardware/bsp/kernel/nxp/imx-v4.1/+/o-iot-preview-5/arch/arm/boot/dts/imx7d-pico.dtsi#849
+
+Cc: Fabio Estevam <festevam@gmail.com>
+Cc: Shawn Guo <shawnguo@kernel.org>
+Cc: Sascha Hauer <s.hauer@pengutronix.de>
+
+Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
+---
+ arch/arm/boot/dts/imx7d-pico.dtsi | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+--- a/arch/arm/boot/dts/imx7d-pico.dtsi
++++ b/arch/arm/boot/dts/imx7d-pico.dtsi
+@@ -108,6 +108,14 @@
+       assigned-clock-rates = <0>, <32768>;
+ };
+ 
++&cpu0 {
++      cpu-supply = <&sw1a_reg>;
++};
++
++&cpu1 {
++      cpu-supply = <&sw1a_reg>;
++};
++
+ &ecspi3 {
+       cs-gpios = <&gpio4 11 GPIO_ACTIVE_LOW>;
+       pinctrl-names = "default";