Commit ec88a9c3 authored by Christian Lamparter's avatar Christian Lamparter Committed by Florian Fainelli
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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: default avatarChristian Lamparter <chunkeey@gmail.com>
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
parent c4cd6fca

arch/arm/boot/dts/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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 \

arch/arm/boot/dts/bcm53016-meraki-mr32.dts

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+197 −0
Original line number Diff line number Diff line 
// 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>;

		};

	};

};