Initial support for Raspberry Pi model 3A+

1 files changed, 511 insertions, 0 deletions

diff --git a/bcm2837-dts-add-Raspberry-Pi-3-A.patch b/bcm2837-dts-add-Raspberry-Pi-3-A.patch
new file mode 100644
index 000000000..705fca6cb
--- /dev/null
+++ b/bcm2837-dts-add-Raspberry-Pi-3-A.patch
@@ -0,0 +1,511 @@
+From patchwork Tue Dec  4 18:58:17 2018
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+From: Stefan Wahren <stefan.wahren@i2se.com>
+To: Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
+ Florian Fainelli <f.fainelli@gmail.com>, Ray Jui <rjui@broadcom.com>,
+ Scott Branden <sbranden@broadcom.com>, Eric Anholt <eric@anholt.net>,
+ Arnd Bergmann <arnd@arndb.de>
+Subject: [PATCH V3 1/3] dt-bindings: bcm: Add Raspberry Pi 3 A+
+Date: Tue,  4 Dec 2018 19:58:17 +0100
+Message-Id: <1543949899-13380-2-git-send-email-stefan.wahren@i2se.com>
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+Cc: Stefan Wahren <stefan.wahren@i2se.com>, devicetree@vger.kernel.org,
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+This adds the root properties for the Raspberry Pi 3 A+ .
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+Reviewed-by: Rob Herring <robh@kernel.org>
+---
+ Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
+index 0dcc3ea..245328f 100644
+--- a/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
++++ b/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
+@@ -30,6 +30,10 @@ Raspberry Pi 2 Model B
+ Required root node properties:
+ compatible = "raspberrypi,2-model-b", "brcm,bcm2836";
+ 
++Raspberry Pi 3 Model A+
++Required root node properties:
++compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837";
++
+ Raspberry Pi 3 Model B
+ Required root node properties:
+ compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
+
+From patchwork Tue Dec  4 18:58:18 2018
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+ id 1MTfgb-1gvyxH1xQz-00TyQt; Tue, 04 Dec 2018 19:58:54 +0100
+From: Stefan Wahren <stefan.wahren@i2se.com>
+To: Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
+ Florian Fainelli <f.fainelli@gmail.com>, Ray Jui <rjui@broadcom.com>,
+ Scott Branden <sbranden@broadcom.com>, Eric Anholt <eric@anholt.net>,
+ Arnd Bergmann <arnd@arndb.de>
+Subject: [PATCH V3 2/3] ARM: dts: add Raspberry Pi 3 A+
+Date: Tue,  4 Dec 2018 19:58:18 +0100
+Message-Id: <1543949899-13380-3-git-send-email-stefan.wahren@i2se.com>
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+Cc: Stefan Wahren <stefan.wahren@i2se.com>, devicetree@vger.kernel.org,
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+The Raspberry Pi 3 A+ is similar to the Pi 3 B+ but has only 512 MB RAM,
+1 USB 2.0 port and no Ethernet.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+---
+ arch/arm/boot/dts/Makefile                 |   1 +
+ arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts | 107 +++++++++++++++++++++++++++++
+ 2 files changed, 108 insertions(+)
+ create mode 100644 arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
+
+diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
+index b0e966d..15bbd0d 100644
+--- a/arch/arm/boot/dts/Makefile
++++ b/arch/arm/boot/dts/Makefile
+@@ -79,6 +79,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
+ 	bcm2835-rpi-a-plus.dtb \
+ 	bcm2835-rpi-cm1-io1.dtb \
+ 	bcm2836-rpi-2-b.dtb \
++	bcm2837-rpi-3-a-plus.dtb \
+ 	bcm2837-rpi-3-b.dtb \
+ 	bcm2837-rpi-3-b-plus.dtb \
+ 	bcm2837-rpi-cm3-io3.dtb \
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
+new file mode 100644
+index 0000000..b2df7cf
+--- /dev/null
++++ b/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
+@@ -0,0 +1,107 @@
++// SPDX-License-Identifier: GPL-2.0
++/dts-v1/;
++#include "bcm2837.dtsi"
++#include "bcm2836-rpi.dtsi"
++#include "bcm283x-rpi-usb-host.dtsi"
++
++/ {
++	compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837";
++	model = "Raspberry Pi 3 Model A+";
++
++	chosen {
++		/* 8250 auxiliary UART instead of pl011 */
++		stdout-path = "serial1:115200n8";
++	};
++
++	memory {
++		reg = <0 0x20000000>;
++	};
++
++	leds {
++		act {
++			gpios = <&gpio 29 GPIO_ACTIVE_HIGH>;
++		};
++
++		pwr {
++			label = "PWR";
++			gpios = <&expgpio 2 GPIO_ACTIVE_LOW>;
++		};
++	};
++
++	wifi_pwrseq: wifi-pwrseq {
++		compatible = "mmc-pwrseq-simple";
++		reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
++	};
++};
++
++&firmware {
++	expgpio: gpio {
++		compatible = "raspberrypi,firmware-gpio";
++		gpio-controller;
++		#gpio-cells = <2>;
++		gpio-line-names = "BT_ON",
++				  "WL_ON",
++				  "STATUS_LED",
++				  "",
++				  "",
++				  "CAM_GPIO0",
++				  "CAM_GPIO1",
++				  "";
++		status = "okay";
++	};
++};
++
++&hdmi {
++	hpd-gpios = <&gpio 28 GPIO_ACTIVE_LOW>;
++};
++
++&pwm {
++	pinctrl-names = "default";
++	pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>;
++	status = "okay";
++};
++
++/* SDHCI is used to control the SDIO for wireless */
++&sdhci {
++	#address-cells = <1>;
++	#size-cells = <0>;
++	pinctrl-names = "default";
++	pinctrl-0 = <&emmc_gpio34>;
++	status = "okay";
++	bus-width = <4>;
++	non-removable;
++	mmc-pwrseq = <&wifi_pwrseq>;
++
++	brcmf: wifi@1 {
++		reg = <1>;
++		compatible = "brcm,bcm4329-fmac";
++	};
++};
++
++/* SDHOST is used to drive the SD card */
++&sdhost {
++	pinctrl-names = "default";
++	pinctrl-0 = <&sdhost_gpio48>;
++	status = "okay";
++	bus-width = <4>;
++};
++
++/* uart0 communicates with the BT module */
++&uart0 {
++	pinctrl-names = "default";
++	pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32 &gpclk2_gpio43>;
++	status = "okay";
++
++	bluetooth {
++		compatible = "brcm,bcm43438-bt";
++		max-speed = <2000000>;
++		shutdown-gpios = <&expgpio 0 GPIO_ACTIVE_HIGH>;
++	};
++};
++
++/* uart1 is mapped to the pin header */
++&uart1 {
++	pinctrl-names = "default";
++	pinctrl-0 = <&uart1_gpio14>;
++	status = "okay";
++};
+
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+ id 1MFJfN-1gjyQ33mR7-00FlVP; Tue, 04 Dec 2018 19:58:55 +0100
+From: Stefan Wahren <stefan.wahren@i2se.com>
+To: Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
+ Florian Fainelli <f.fainelli@gmail.com>, Ray Jui <rjui@broadcom.com>,
+ Scott Branden <sbranden@broadcom.com>, Eric Anholt <eric@anholt.net>,
+ Arnd Bergmann <arnd@arndb.de>
+Subject: [PATCH V3 3/3] arm64: dts: broadcom: Add reference to RPi 3 A+
+Date: Tue,  4 Dec 2018 19:58:19 +0100
+Message-Id: <1543949899-13380-4-git-send-email-stefan.wahren@i2se.com>
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+Cc: Stefan Wahren <stefan.wahren@i2se.com>, devicetree@vger.kernel.org,
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+
+This adds a reference to the dts of the Raspberry Pi 3 A+,
+so we don't need to maintain the content in arm64.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+---
+ arch/arm64/boot/dts/broadcom/Makefile                 | 3 ++-
+ arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-a-plus.dts | 2 ++
+ 2 files changed, 4 insertions(+), 1 deletion(-)
+ create mode 100644 arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-a-plus.dts
+
+diff --git a/arch/arm64/boot/dts/broadcom/Makefile b/arch/arm64/boot/dts/broadcom/Makefile
+index 667ca98..d1d31cc 100644
+--- a/arch/arm64/boot/dts/broadcom/Makefile
++++ b/arch/arm64/boot/dts/broadcom/Makefile
+@@ -1,5 +1,6 @@
+ # SPDX-License-Identifier: GPL-2.0
+-dtb-$(CONFIG_ARCH_BCM2835) += bcm2837-rpi-3-b.dtb \
++dtb-$(CONFIG_ARCH_BCM2835) += bcm2837-rpi-3-a-plus.dtb \
++			      bcm2837-rpi-3-b.dtb \
+ 			      bcm2837-rpi-3-b-plus.dtb \
+ 			      bcm2837-rpi-cm3-io3.dtb
+ 
+diff --git a/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-a-plus.dts b/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-a-plus.dts
+new file mode 100644
+index 0000000..f0ec56a
+--- /dev/null
++++ b/arch/arm64/boot/dts/broadcom/bcm2837-rpi-3-a-plus.dts
+@@ -0,0 +1,2 @@
++// SPDX-License-Identifier: GPL-2.0
++#include "arm/bcm2837-rpi-3-a-plus.dts"