[PATCH v1 6/6] ARM: BCM5301X: Add DT for Meraki MR32

Scott Branden scott.branden at broadcom.com
Tue Aug 18 14:19:02 EDT 2020


Hi Christian,

On 2020-08-18 9:39 a.m., Christian Lamparter wrote:
> This patch adds support for Cisco Meraki MR32.
> 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 at gmail.com>
> ---
>  arch/arm/boot/dts/Makefile                 |   1 +
>  arch/arm/boot/dts/bcm53016-meraki-mr32.dts | 191 +++++++++++++++++++++
>  2 files changed, 192 insertions(+)
>  create mode 100644 arch/arm/boot/dts/bcm53016-meraki-mr32.dts
>
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index e6a1cac0bfc7..b0756d62772b 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -126,6 +126,7 @@ dtb-$(CONFIG_ARCH_BCM_5301X) += \
>  	bcm47094-luxul-xwr-3100.dtb \
>  	bcm47094-luxul-xwr-3150-v1.dtb \
>  	bcm47094-netgear-r8500.dtb \
> +	bcm53016-meraki-mr32.dtb \
>  	bcm47094-phicomm-k3.dtb \
alpha order would be here.
>  	bcm94708.dtb \
>  	bcm94709.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
> index 000000000000..816fe8cd492d
> --- /dev/null
> +++ b/arch/arm/boot/dts/bcm53016-meraki-mr32.dts
> @@ -0,0 +1,191 @@
> +// 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 at 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>;
> +	};
> +
> +	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>;
> +		};
> +	};
> +
> +	i2c-gpio {
> +		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 at 45 {
> +			compatible = "ti,ina219";
> +			reg = <0x45>;
> +			shunt-resistor = <60000>; /* = 60 mOhms */
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +		};
> +
> +		eeprom: eeprom at 50 {
> +			compatible = "atmel,24c64";
> +			reg = <0x50>;
> +			pagesize = <32>;
> +			read-only;
> +		};
> +	};
> +
> +	gpio-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>;
> +		};
> +	};
> +
> +};
> +
> +&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";
> +};
> +
> +&nandcs {
> +	nand-ecc-algo = "hw";
> +
> +	partitions {
> +		/*
> +		 * The partition autodetection does not work for this devi
> +		 * 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"
> +		 */
> +
If autodetection doesn't work..
the partition info should be passed in via the bootloader rather than the DT?
> +		compatible = "fixed-partitions";
> +		#address-cells = <0x1>;
> +		#size-cells = <0x1>;
> +
> +		partition0 at 0 {
> +			label = "u-boot";
> +			reg = <0x0 0x100000>;
> +			read-only;
> +		};
> +
> +		partition1 at 100000 {
> +			label = "bootkernel1";
> +			reg = <0x100000 0x300000>;
> +			read-only;
> +		};
> +
> +		partition2 at 400000 {
> +			label = "nvram";
> +			reg = <0x400000 0x100000>;
> +			read-only;
> +		};
> +
> +		partition3 at 500000 {
> +			label = "bootkernel2";
> +			reg = <0x500000 0x300000>;
> +			read-only;
> +		};
> +
> +		partition4 at 800000 {
> +			label = "ubi";
> +			reg = <0x800000 0x7780000>;
> +		};
> +	};
> +};




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