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>

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 4572db3fa5ae3029d589789c3afb0da4a46713a2..d254ca2a942d044056b96e52d1a4c511d9877bb1 100644 (file)
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -127,6 +127,7 @@ 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 \

diff --git a/arch/arm/boot/dts/bcm53016-meraki-mr32.dts b/arch/arm/boot/dts/bcm53016-meraki-mr32.dts
new file mode 100644 (file)
index 0000000..3b978dc
--- /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>;
+               };
+       };
+};