From: "J. Neuschäfer" <j.ne@xxxxxxxxxx>
What works so far:
- serial port
- LEDs
- Ethernet
- PCIe (port 1 tested)
- Flash access
What doesn't work:
- Access of the YAFFS file system preinstalled by the original firmware
(mainline Linux does not include the YAFFS file system)
- Writing NAND flash from Linux and reading the same from U-Boot
(there is some issue related to ECC)
Signed-off-by: J. Neuschäfer <j.ne@xxxxxxxxxx>
---
Note: This patch requires the following patchset as it defines bindings
used in lancom-nwapp2.dts:
[PATCH v2 0/3] gpio: 74HC595 / 74x164 shift register improvements
---
arch/powerpc/boot/dts/Makefile | 1 +
arch/powerpc/boot/dts/lancom-nwapp2.dts | 276 ++++++++++++++++++++++++++++++++
2 files changed, 277 insertions(+)
diff --git a/arch/powerpc/boot/dts/Makefile b/arch/powerpc/boot/dts/Makefile
index 6aee895d5baaa2c978d4b1c82a6d198d9e166ea2..43e20d8b776b1716a91e6ec8e135c0a45c8e8c77 100644
--- a/arch/powerpc/boot/dts/Makefile
+++ b/arch/powerpc/boot/dts/Makefile
@@ -6,5 +6,6 @@ dtb-$(CONFIG_OF_ALL_DTBS) := $(patsubst $(src)/%.dts,%.dtb, $(wildcard $(src)/*.
dtb-$(CONFIG_MPC831x) += \
kmeter1.dtb \
+ lancom-nwapp2.dtb \
mpc8313erdb.dtb \
mpc8315erdb.dtb
diff --git a/arch/powerpc/boot/dts/lancom-nwapp2.dts b/arch/powerpc/boot/dts/lancom-nwapp2.dts
new file mode 100644
index 0000000000000000000000000000000000000000..d46d94c27ecb91db32c8acb4136cb6e8d0df52f5
--- /dev/null
+++ b/arch/powerpc/boot/dts/lancom-nwapp2.dts
@@ -0,0 +1,276 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright 2024 J. Neuschäfer
+//
+// LANCOM NWAPP2, marketed as:
+// - LANCOM L-321agn Wireless (R2)
+// - LANCOM L-322agn dual Wireless (R2)
+// - LANCOM L-322E Wireless
+#include "mpc8314e.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+ compatible = "lancom,nwapp2", "fsl,mpc8314e";
+ model = "LANCOM NWAPP2";
+
+ memory {
+ reg = <0x00000000 0x08000000>; // 128MB at 0
+ };
+
+ aliases {
+ serial0 = &serial0;
+ pci1 = &pci1;
+ pci2 = &pci2;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ gpio-watchdog {
+ compatible = "linux,wdt-gpio";
+ gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+ hw_algo = "toggle";
+ hw_margin_ms = <1000>;
+ always-running;
+ };
+
+ gpio-restart {
+ compatible = "gpio-restart";
+ gpios = <&gpio 10 GPIO_ACTIVE_HIGH>;
+ };
+
+ gpio-keys {
+ compatible = "gpio-keys";
+
+ reset-button {
+ label = "Reset Button";
+ linux,code = <KEY_SETUP>;
+ gpios = <&gpio 1 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ gpio-leds {
+ compatible = "gpio-leds";
+
+ led_power_red: led-0 {
+ label = "red:power";
+ gpios = <&expander 0 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led_power_green: led-1 {
+ label = "green:power";
+ gpios = <&expander 1 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led_wlan_link_red: led-2 {
+ label = "red:wlan-link";
+ gpios = <&expander 2 GPIO_ACTIVE_LOW>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led_wlan_link_green: led-3 {
+ label = "green:wlan-link";
+ gpios = <&expander 3 GPIO_ACTIVE_LOW>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led_wlan_data_red: led-4 {
+ label = "red:wlan-data";
+ gpios = <&expander 4 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led_eth_red: led-10 {
+ label = "red:eth";
+ gpios = <&expander 10 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led_power_top_red: led-12 {
+ label = "red:power-top";
+ gpios = <&expander 12 GPIO_ACTIVE_LOW>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led_power_top_green: led-13 {
+ label = "green:power-top";
+ gpios = <&expander 13 GPIO_ACTIVE_LOW>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+
+ led_wlan_top_red: led-14 {
+ label = "red:wlan-top";
+ gpios = <&expander 14 GPIO_ACTIVE_LOW>;
+ color = <LED_COLOR_ID_RED>;
+ };
+
+ led_wlan_top_green: led-15 {
+ label = "green:wlan-top";
+ gpios = <&expander 15 GPIO_ACTIVE_LOW>;
+ color = <LED_COLOR_ID_GREEN>;
+ };
+ };
+
+ led-power {
+ label = "multicolor:power";
+ compatible = "leds-group-multicolor";
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_POWER;
+ leds = <&led_power_red>, <&led_power_green>;
+ };
+
+ led-wlan-link {
+ label = "multicolor:wlan-link";
+ compatible = "leds-group-multicolor";
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_WLAN;
+ leds = <&led_wlan_link_red>, <&led_wlan_link_green>;
+ };
+
+ led-wlan-data {
+ label = "multicolor:wlan-data";
+ compatible = "leds-group-multicolor";
+ color = <LED_COLOR_ID_MULTI>;
+ leds = <&led_wlan_data_red>;
+ };
+
+ led-eth {
+ label = "multicolor:eth";
+ compatible = "leds-group-multicolor";
+ color = <LED_COLOR_ID_MULTI>;
+ leds = <&led_eth_red>;
+ };
+
+ led-power-top {
+ label = "multicolor:power-top";
+ compatible = "leds-group-multicolor";
+ color = <LED_COLOR_ID_MULTI>;
+ function = LED_FUNCTION_POWER;
+ leds = <&led_power_top_red>, <&led_power_top_green>;
+ };
+
+ led-wlan-top {
+ label = "multicolor:wlan-top";
+ compatible = "leds-group-multicolor";
+ color = <LED_COLOR_ID_MULTI>;
+ leds = <&led_wlan_top_red>, <&led_wlan_top_green>;
+ };
+};
+
+&gpio {
+ gpio-line-names =
+ /* 0 - 7 */ "DEBUG#", "RESET_BTN#", "", "EXP_LATCH", "", "", "", "PCIE_RST#",
+ /* 8 - 15 */ "", "", "BOARD_RST", "", "", "", "", "",
+ /* 16 - 23 */ "", "", "WDT_TOGGLE", "", "", "", "PHY_RST#", "",
+ /* 24 - 31 */ "", "", "", "", "", "", "", "";
+};
+
+&localbus {
+ status = "okay";
+ ranges = <0x0 0x0 0xfe000000 0x00008000>;
+
+ nand@0,0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "fsl,mpc8315-fcm-nand",
+ "fsl,elbc-fcm-nand";
+ reg = <0x0 0x0 0x2000>;
+
+ partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition@0 {
+ label = "loader1";
+ reg = <0x0 0x8000>;
+ read-only;
+ };
+
+ partition@8000 {
+ label = "loader2";
+ reg = <0x8000 0x78000>;
+ read-only;
+ };
+
+ // 0x80000:0xf80000 is designated "loader spare" by
+ // vendor firmware, but we re-use it for our purposes.
+
+ partition@80000 {
+ label = "u-boot-env";
+ reg = <0x80000 0x80000>;
+ };
+
+ partition@100000 {
+ label = "loader-spare";
+ reg = <0x100000 0xf00000>;
+ };
+
+ partition@1000000 {
+ label = "fs";
+ reg = <0x1000000 0xf000000>;
+ /* YAFFS2 filesystem */
+ };
+ };
+ };
+};
+
+&enet0 {
+ status = "okay";
+ phy-handle = <&phy>;
+ phy-mode = "rgmii-id";
+};
+
+&mdio0 {
+ status = "okay";
+ compatible = "fsl,gianfar-mdio";
+
+ phy: ethernet-phy@1 {
+ /* Atheros AR8032 */
+ reg = <1>;
+ compatible = "ethernet-phy-ieee802.3-c22";
+ reset-gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
+ };
+};
+
+&pci1 {
+ status = "okay";
+ ranges = <0x02000000 0 0x88000000 0x88000000 0 0x02000000>,
+ <0x01000000 0 0x00000000 0xc9080000 0 0x00800000>;
+};
+
+&pci2 {
+ status = "okay";
+ ranges = <0x02000000 0 0x88000000 0x8c000000 0 0x02000000>,
+ <0x01000000 0 0x00000000 0xc9900000 0 0x00800000>;
+};
+
+&serial0 {
+ status = "okay";
+};
+
+&spi {
+ status = "okay";
+ /*
+ * The GPIO expander doesn't really use a chip select.
+ * Instead pin 3 is connected to the latch clock input, which triggers
+ * the transfer of bits from the shift register to the output pins on
+ * rising edges. Specifying it as a active-low chip select works
+ * because the CS# is driven high after the serial transfer is done.
+ */
+ cs-gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+
+ expander: gpio-controller@0 {
+ reg = <0>;
+ compatible = "onnn,74hc595a";
+ spi-max-frequency = <5000000>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ registers-number = <2>;
+ };
+};
--
2.45.2
