linux-iot2050: Add the support for the SM variant

This patch set is the kernel bsp for the new IOT2050-SM variant.

Refer to the dts patch for details of the new variant.

For kernel part, add driver for Everlight PM16D17 light sensor.

In addition, a minor cleanup of the R5 lockstep disabling.

Signed-off-by: Chao Zeng <[email protected]>
Signed-off-by: Li Hua Qian <[email protected]>
Signed-off-by: Baocheng Su <[email protected]>

recipes-kernel/linux/files/iot2050_defconfig_extra.cfg

@@ -222,3 +222,21 @@ CONFIG_DRM_VIRTIO_GPU=y
 CONFIG_VIRTIO_INPUT=y
 
 CONFIG_WATCHDOG_SYSFS=y
+
+CONFIG_IIO_ST_LSM6DSX=m
+CONFIG_IIO_ST_LSM6DSX_I2C=m
+
+CONFIG_IIO_BUFFER=y
+CONFIG_IIO_BUFFER_CB=m
+CONFIG_IIO_BUFFER_DMA=m
+CONFIG_IIO_BUFFER_DMAENGINE=m
+CONFIG_IIO_BUFFER_HW_CONSUMER=m
+CONFIG_IIO_KFIFO_BUF=m
+CONFIG_IIO_TRIGGERED_BUFFER=m
+CONFIG_IIO_CONFIGFS=m
+CONFIG_IIO_TRIGGER=y
+CONFIG_IIO_CONSUMERS_PER_TRIGGER=2
+CONFIG_IIO_SW_DEVICE=m
+CONFIG_IIO_SW_TRIGGER=m
+CONFIG_IIO_TRIGGERED_EVENT=m
+CONFIG_PM16D17=m

recipes-kernel/linux/files/patches-6.1/0078-arm64-dts-ti-iot2050-Disable-R5-lockstep-for-all-PG2.patch

@@ -0,0 +1,110 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Baocheng Su <[email protected]>
+Date: Fri, 1 Dec 2023 19:25:47 +0800
+Subject: [PATCH] arm64: dts: ti: iot2050: Disable R5 lockstep for all PG2
+ boards
+
+The R5 lockstep disabling should be common for all PG2 boards, move it
+from variants dts to common-pg2.dtsi.
+
+As now the Basic PG2 consumes this twice, move Basic disabling to the
+PG1 variant.
+
+Signed-off-by: Baocheng Su <[email protected]>
+[Jan: avoid duplication of disabling for Basic PG2]
+Signed-off-by: Jan Kiszka <[email protected]>
+---
+ arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi     | 7 ++++++-
+ arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic-common.dtsi | 5 -----
+ arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic.dts         | 5 +++++
+ arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts   | 5 -----
+ arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-pg2.dts  | 7 +------
+ 5 files changed, 12 insertions(+), 17 deletions(-)
+
+diff --git a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi
+index e9b57b87e42e..42adb8815f38 100644
+--- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi
++++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common-pg2.dtsi
+@@ -1,6 +1,6 @@
+ // SPDX-License-Identifier: GPL-2.0
+ /*
+- * Copyright (c) Siemens AG, 2021
++ * Copyright (c) Siemens AG, 2021-2023
+  *
+  * Authors:
+  *   Chao Zeng <[email protected]>
+@@ -9,6 +9,11 @@
+  * Common bits of the IOT2050 Basic and Advanced variants, PG2
+  */
+
++&mcu_r5fss0 {
++	/* lock-step mode not supported on PG2 boards */
++	ti,cluster-mode = <0>;
++};
++
+ &main_pmx0 {
+ 	cp2102n_reset_pin_default: cp2102n-reset-default-pins {
+ 		pinctrl-single,pins = <
+diff --git a/arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic-common.dtsi b/arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic-common.dtsi
+index 9b757ed3bdcd..bba5dc527f52 100644
+--- a/arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic-common.dtsi
++++ b/arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic-common.dtsi
+@@ -53,8 +53,3 @@ &main_uart0 {
+ 	pinctrl-names = "default";
+ 	pinctrl-0 = <&main_uart0_pins_default>;
+ };
+-
+-&mcu_r5fss0 {
+-	/* lock-step mode not supported on Basic boards */
+-	ti,cluster-mode = <0>;
+-};
+diff --git a/arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic.dts b/arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic.dts
+index 87928ff28214..be9c8db4c43a 100644
+--- a/arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic.dts
++++ b/arch/arm64/boot/dts/ti/k3-am6528-iot2050-basic.dts
+@@ -22,3 +22,8 @@ / {
+ 	compatible = "siemens,iot2050-basic", "ti,am654";
+ 	model = "SIMATIC IOT2050 Basic";
+ };
++
++&mcu_r5fss0 {
++	/* lock-step mode not supported on this board */
++	ti,cluster-mode = <0>;
++};
+diff --git a/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts b/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts
+index bd6f2e696e94..1e5d4d98b69b 100644
+--- a/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts
++++ b/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-m2.dts
+@@ -21,11 +21,6 @@ / {
+ 	model = "SIMATIC IOT2050 Advanced M2";
+ };
+
+-&mcu_r5fss0 {
+-	/* lock-step mode not supported on this board */
+-	ti,cluster-mode = <0>;
+-};
+-
+ &main_pmx0 {
+ 	main_bkey_pcie_reset: main-bkey-pcie-reset-default-pins {
+ 		pinctrl-single,pins = <
+diff --git a/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-pg2.dts b/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-pg2.dts
+index f00dc86d01b9..a8ce8c891894 100644
+--- a/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-pg2.dts
++++ b/arch/arm64/boot/dts/ti/k3-am6548-iot2050-advanced-pg2.dts
+@@ -1,6 +1,6 @@
+ // SPDX-License-Identifier: GPL-2.0
+ /*
+- * Copyright (c) Siemens AG, 2018-2021
++ * Copyright (c) Siemens AG, 2018-2023
+  *
+  * Authors:
+  *   Le Jin <[email protected]>
+@@ -22,8 +22,3 @@ / {
+ 	compatible = "siemens,iot2050-advanced-pg2", "ti,am654";
+ 	model = "SIMATIC IOT2050 Advanced PG2";
+ };
+-
+-&mcu_r5fss0 {
+-	/* lock-step mode not supported on this board */
+-	ti,cluster-mode = <0>;
+-};