From ec88a9c344d9fd8c3b11bff1f99a0b6248ae256d Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@gmail.com>
Date: Sat, 22 Aug 2020 18:19:23 +0200
Subject: [PATCH] ARM: BCM5301X: Add DT for Meraki MR32
add support for the Cisco Meraki MR32.
This is a dual-band enterprise class 802.11ac access point.
The unit was donated by Chris Blake. Thank you!
SoC: Broadcom BCM53016A1 (1 GHz, 2 cores)
RAM: 128 MiB
NAND: 128 MiB Spansion S34ML01G2 (~114 MiB useable)
ETH: 1GBit Ethernet Port - PoE
WIFI1: Broadcom BCM43520 an+ac (2x2:2 - id: 0x4352)
WIFI2: Broadcom BCM43520 bgn (2x2:2 - id: 0x4352)
WIFI3: Broadcom BCM43428 abgn (1x1:1 - id: 43428)
BLE: Broadcom BCM20732 (ttyS1)
LEDS: 1 x Programmable RGB Status LED (driven by a PWM)
1 x White LED (GPIO)
1 x Orange LED Fault Indicator (GPIO)
2 x LAN Activity / Speed LEDs (On the RJ45 Port)
BUTTON: one Reset button
MISC: AT24C64 8KiB EEPROM (i2c - stores Ethernet MAC)
ina219 hardware monitor (i2c)
Kensington Lock
SERIAL:
WARNING: The serial port needs a TTL/RS-232 3V3 level converter!
The Serial setting is 115200-8-N-1. The board has a populated
right angle 1x4 0.1" pinheader.
The pinout is: VCC, RX, TX, GND.
Odd stuff:
- uart0 clock frequency is 62.5 MHz.
- The LEDs are labeled as SYS-LED1 through SYS-LED3
because of the silkscreen on the PCB.
- the original u-boot has been compiled with most functions
and commands disabled. The u-boot env isn't setup properly
either and as a result, the bcm47xxpart probing is not
working. Hence, the nand partitions are specified through a
"fixed-partition" binding.
- The "WICED SMART(TM)" Bluetooth LE 4.0 BCM20732 chip is
connected to uart2 of the SoC. The BCM20732 does not
provide a HCI. So the linux' bluetooth stack is useless.
The mock-up node with the compatible binding and
enable-gpios property is provided solely as documentation.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
arch/arm/boot/dts/Makefile | 1 +
arch/arm/boot/dts/bcm53016-meraki-mr32.dts | 197 +++++++++++++++++++++
2 files changed, 198 insertions(+)
create mode 100644 arch/arm/boot/dts/bcm53016-meraki-mr32.dts
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -118,6 +118,7 @@ dtb-$(CONFIG_ARCH_BCM_5301X) += \
bcm47094-luxul-xwr-3150-v1.dtb \
bcm47094-netgear-r8500.dtb \
bcm47094-phicomm-k3.dtb \
+ bcm53016-meraki-mr32.dtb \
bcm94708.dtb \
bcm94709.dtb \
bcm953012er.dtb \
--- /dev/null
+++ b/arch/arm/boot/dts/bcm53016-meraki-mr32.dts
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Broadcom BCM470X / BCM5301X ARM platform code.
+ * DTS for Meraki MR32 / Codename: Espresso
+ *
+ * Copyright (C) 2018-2020 Christian Lamparter <chunkeey@gmail.com>
+ */
+
+/dts-v1/;
+
+#include "bcm4708.dtsi"
+#include "bcm5301x-nand-cs0-bch8.dtsi"
+#include <dt-bindings/leds/common.h>
+
+/ {
+ compatible = "meraki,mr32", "brcm,brcm53016", "brcm,bcm4708";
+ model = "Meraki MR32";
+
+ chosen {
+ bootargs = " console=ttyS0,115200n8 earlycon";
+ };
+
+ memory {
+ reg = <0x00000000 0x08000000>;
+ device_type = "memory";
+ };
+
+ aliases {
+ serial1 = &uart2;
+ };
+
+ leds {
+ compatible = "gpio-leds";
+
+ sysled3 {
+ function = LED_FUNCTION_FAULT;
+ color = <LED_COLOR_ID_AMBER>;
+ gpios = <&chipcommon 18 GPIO_ACTIVE_LOW>;
+ panic-indicator;
+ };
+ sysled2 {
+ function = LED_FUNCTION_INDICATOR;
+ color = <LED_COLOR_ID_WHITE>;
+ gpios = <&chipcommon 19 GPIO_ACTIVE_HIGH>;
+ };
+ };
+
+ keys {
+ compatible = "gpio-keys";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ restart {
+ label = "Reset";
+ linux,code = <KEY_RESTART>;
+ gpios = <&chipcommon 21 GPIO_ACTIVE_LOW>;
+ };
+ };
+
+ pwm-leds {
+ compatible = "pwm-leds";
+
+ red {
+ /* SYS-LED 1 - Tricolor */
+ function = LED_FUNCTION_INDICATOR;
+ color = <LED_COLOR_ID_RED>;
+ pwms = <&pwm 0 50000 0>;
+ max-brightness = <255>;
+ };
+
+ green {
+ /* SYS-LED 1 - Tricolor */
+ function = LED_FUNCTION_POWER;
+ color = <LED_COLOR_ID_GREEN>;
+ pwms = <&pwm 1 50000 0>;
+ max-brightness = <255>;
+ };
+
+ blue {
+ /* SYS-LED 1 - Tricolor */
+ function = LED_FUNCTION_INDICATOR;
+ color = <LED_COLOR_ID_BLUE>;
+ pwms = <&pwm 2 50000 0>;
+ max-brightness = <255>;
+ };
+ };
+
+ i2c {
+ /*
+ * The platform provided I2C does not budge.
+ * This is a replacement until I can figure
+ * out what are the missing bits...
+ */
+
+ compatible = "i2c-gpio";
+ sda-gpios = <&chipcommon 5 GPIO_ACTIVE_HIGH>;
+ scl-gpios = <&chipcommon 4 GPIO_ACTIVE_HIGH>;
+ i2c-gpio,delay-us = <10>; /* close to 100 kHz */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ current_sense: ina219@45 {
+ compatible = "ti,ina219";
+ reg = <0x45>;
+ shunt-resistor = <60000>; /* = 60 mOhms */
+ };
+
+ eeprom: eeprom@50 {
+ compatible = "atmel,24c64";
+ reg = <0x50>;
+ pagesize = <32>;
+ read-only;
+ };
+ };
+};
+
+&uart0 {
+ clock-frequency = <62500000>;
+ /delete-property/ clocks;
+};
+
+&uart1 {
+ status = "disabled";
+};
+
+&uart2 {
+ status = "okay";
+ /*
+ * bluetooth-le {
+ * compatible = "brcm,bcm20732";
+ * enable-gpios = <&chipcommon 20 GPIO_ACTIVE_HIGH>;
+ *};
+ */
+};
+
+&gmac1 {
+ status = "disabled";
+};
+&gmac2 {
+ status = "disabled";
+};
+&gmac3 {
+ status = "disabled";
+};
+
+&pwm {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinmux_pwm>;
+};
+
+&nandcs {
+ nand-ecc-algo = "hw";
+
+ partitions {
+ /*
+ * The partition autodetection does not work for this device.
+ * It will only detect the "nvram" partition with an incorrect size.
+ * [ 1.721667] 1 bcm47xxpart partitions found on MTD device brcmnand.0
+ * [ 1.727962] Creating 1 MTD partitions on "brcmnand.0":
+ * [ 1.733117] 0x000000400000-0x000008000000 : "nvram"
+ */
+
+ compatible = "fixed-partitions";
+ #address-cells = <0x1>;
+ #size-cells = <0x1>;
+
+ partition0@0 {
+ label = "u-boot";
+ reg = <0x0 0x100000>;
+ read-only;
+ };
+
+ partition1@100000 {
+ label = "bootkernel1";
+ reg = <0x100000 0x300000>;
+ read-only;
+ };
+
+ partition2@400000 {
+ label = "nvram";
+ reg = <0x400000 0x100000>;
+ read-only;
+ };
+
+ partition3@500000 {
+ label = "bootkernel2";
+ reg = <0x500000 0x300000>;
+ read-only;
+ };
+
+ partition4@800000 {
+ label = "ubi";
+ reg = <0x800000 0x7780000>;
+ };
+ };
+};