arm: dts: iot2050: Add support for M.2 variant
Add support for the M.2 board based on the iot2050 advanced board.
The board has two m.2 connectors, one is B-keyed, the other E-keyed.
The B-key slot can connect 5G/SSD devices, and E-key can be used for
WIFI/BT devices.
This variant is covered by PG2 firmware image.
Signed-off-by: chao zeng <chao.zeng@siemens.com>
[Jan: align DT to kernel, polish wording]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index c160e884..79ed4ac 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1259,7 +1259,8 @@
k3-am6528-iot2050-basic.dtb \
k3-am6528-iot2050-basic-pg2.dtb \
k3-am6548-iot2050-advanced.dtb \
- k3-am6548-iot2050-advanced-pg2.dtb
+ k3-am6548-iot2050-advanced-pg2.dtb \
+ k3-am6548-iot2050-advanced-m2.dtb
dtb-$(CONFIG_SOC_K3_J721E) += k3-j721e-common-proc-board.dtb \
k3-j721e-r5-common-proc-board.dtb \
k3-j7200-common-proc-board.dtb \
diff --git a/arch/arm/dts/k3-am6548-iot2050-advanced-m2.dts b/arch/arm/dts/k3-am6548-iot2050-advanced-m2.dts
new file mode 100644
index 0000000..9400e35
--- /dev/null
+++ b/arch/arm/dts/k3-am6548-iot2050-advanced-m2.dts
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) Siemens AG, 2018-2023
+ *
+ * Authors:
+ * Chao Zeng <chao.zeng@siemens.com>
+ * Jan Kiszka <jan.kiszka@siemens.com>
+ *
+ * AM6548-based (quad-core) IOT2050 M.2 variant (based on Advanced Product
+ * Generation 2), 2 GB RAM, 16 GB eMMC, USB-serial converter on connector X30
+ *
+ * Product homepage:
+ * https://new.siemens.com/global/en/products/automation/pc-based/iot-gateways/simatic-iot2050.html
+ */
+
+#include "k3-am6548-iot2050-advanced-common.dtsi"
+#include "k3-am65-iot2050-common-pg2.dtsi"
+
+/ {
+ compatible = "siemens,iot2050-advanced-m2", "ti,am654";
+ model = "SIMATIC IOT2050 Advanced M2";
+};
+
+&mcu_r5fss0 {
+ /* lock-step mode not supported on this board */
+ ti,cluster-mode = <0>;
+};
+
+&main_pmx0 {
+ main_m2_enable_pins_default: main-m2-enable-pins-default {
+ pinctrl-single,pins = <
+ AM65X_IOPAD(0x01c4, PIN_INPUT_PULLUP, 7) /* (AH13) GPIO1_17 */
+ >;
+ };
+
+ main_bkey_pcie_reset: main-bkey-pcie-reset {
+ pinctrl-single,pins = <
+ AM65X_IOPAD(0x01bc, PIN_OUTPUT_PULLUP, 7) /* (AG13) GPIO1_15 */
+ >;
+ };
+
+ main_pmx0_m2_config_pins_default: main-pmx0-m2-config-pins-default {
+ pinctrl-single,pins = <
+ AM65X_IOPAD(0x01c8, PIN_INPUT_PULLUP, 7) /* (AE13) GPIO1_18 */
+ AM65X_IOPAD(0x01cc, PIN_INPUT_PULLUP, 7) /* (AD13) GPIO1_19 */
+ >;
+ };
+
+ main_m2_pcie_mux_control: main-m2-pcie-mux-control {
+ pinctrl-single,pins = <
+ AM65X_IOPAD(0x0148, PIN_INPUT_PULLUP, 7) /* (AG22) GPIO0_82 */
+ AM65X_IOPAD(0x0160, PIN_INPUT_PULLUP, 7) /* (AE20) GPIO0_88 */
+ AM65X_IOPAD(0x0164, PIN_INPUT_PULLUP, 7) /* (AF19) GPIO0_89 */
+ >;
+ };
+};
+
+&main_pmx1 {
+ main_pmx1_m2_config_pins_default: main-pmx1-m2-config-pins-default {
+ pinctrl-single,pins = <
+ AM65X_IOPAD(0x0018, PIN_INPUT_PULLUP, 7) /* (B22) GPIO1_88 */
+ AM65X_IOPAD(0x001c, PIN_INPUT_PULLUP, 7) /* (C23) GPIO1_89 */
+ >;
+ };
+};
+
+&main_gpio0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <
+ &main_m2_pcie_mux_control
+ &arduino_io_d4_to_d9_pins_default
+ >;
+};
+
+&main_gpio1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <
+ &main_m2_enable_pins_default
+ &main_pmx0_m2_config_pins_default
+ &main_pmx1_m2_config_pins_default
+ &cp2102n_reset_pin_default
+ >;
+};
+
+/*
+ * Base configuration for B-key slot with PCIe x2, E-key with USB 2.0 only.
+ * Firmware switches to other modes via device tree overlays.
+ */
+
+&serdes0 {
+ assigned-clocks = <&k3_clks 153 4>, <&serdes0 AM654_SERDES_CMU_REFCLK>;
+ assigned-clock-parents = <&k3_clks 153 8>, <&k3_clks 153 4>;
+};
+
+&pcie0_rc {
+ pinctrl-names = "default";
+ pinctrl-0 = <&main_bkey_pcie_reset>;
+
+ num-lanes = <2>;
+ phys = <&serdes0 PHY_TYPE_PCIE 1>, <&serdes1 PHY_TYPE_PCIE 1>;
+ phy-names = "pcie-phy0","pcie-phy1";
+ reset-gpios = <&main_gpio1 15 GPIO_ACTIVE_HIGH>;
+ status = "okay";
+};
+
+&pcie1_rc {
+ status = "disabled";
+};
+
+&dwc3_0 {
+ assigned-clock-parents = <&k3_clks 151 4>, /* set REF_CLK to 20MHz i.e. PER0_PLL/48 */
+ <&k3_clks 151 9>; /* set PIPE3_TXB_CLK to CLK_12M_RC/256 (for HS only) */
+ /delete-property/ phys;
+ /delete-property/ phy-names;
+};
+
+&usb0 {
+ maximum-speed = "high-speed";
+ /delete-property/ snps,dis-u1-entry-quirk;
+ /delete-property/ snps,dis-u2-entry-quirk;
+};
diff --git a/configs/iot2050_pg2_defconfig b/configs/iot2050_pg2_defconfig
index d2bdeab..b206677 100644
--- a/configs/iot2050_pg2_defconfig
+++ b/configs/iot2050_pg2_defconfig
@@ -69,7 +69,7 @@
# CONFIG_ISO_PARTITION is not set
CONFIG_OF_CONTROL=y
CONFIG_SPL_OF_CONTROL=y
-CONFIG_OF_LIST="k3-am6528-iot2050-basic-pg2 k3-am6548-iot2050-advanced-pg2"
+CONFIG_OF_LIST="k3-am6528-iot2050-basic-pg2 k3-am6548-iot2050-advanced-pg2 k3-am6548-iot2050-advanced-m2"
CONFIG_SPL_MULTI_DTB_FIT=y
CONFIG_SPL_OF_LIST="k3-am65-iot2050-spl"
CONFIG_SPL_MULTI_DTB_FIT_NO_COMPRESSION=y
diff --git a/doc/board/siemens/iot2050.rst b/doc/board/siemens/iot2050.rst
index efe94a4..442d2ca 100644
--- a/doc/board/siemens/iot2050.rst
+++ b/doc/board/siemens/iot2050.rst
@@ -6,7 +6,9 @@
The SIMATIC IOT2050 is an open industrial IoT gateway that is using the TI
AM6528 GP (Basic variant) or the AM6548 HS (Advanced variant). The Advanced
-variant is prepared for secure boot.
+variant is prepared for secure boot. M.2 Variant also uses the AM6548 HS.
+Instead of a MiniPCI connector, it comes with two M.2 connectors and can
+support 5G/WIFI/BT applications or connect an SSD.
The IOT2050 starts only from OSPI. It loads a Siemens-provided bootloader
called SE-Boot for the MCU domain (R5F cores), then hands over to ATF and
@@ -70,7 +72,7 @@
# configure for PG1
$ make iot2050_pg1_defconfig
- # or configure for PG2
+ # or configure for PG2 or the M.2 variant
$ make iot2050_pg2_defconfig
$ make