Raspberry Pi DT updates, Update AllWinner A64 timer errata workaround

1 files changed, 1130 insertions, 0 deletions

diff --git a/ARM-dts-bcm283x-Several-DTS-improvements.patch b/ARM-dts-bcm283x-Several-DTS-improvements.patch
new file mode 100644
index 000000000..807903afa
--- /dev/null
+++ b/ARM-dts-bcm283x-Several-DTS-improvements.patch
@@ -0,0 +1,1130 @@
+From patchwork Sat Jan 12 12:43:23 2019
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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>
+Subject: [PATCH 1/6] ARM: dts: bcm283x: Fix DTC warning for memory node
+Date: Sat, 12 Jan 2019 13:43:23 +0100
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+Cc: Gottfried Haider <gottfried.haider@gmail.com>, devicetree@vger.kernel.org,
+ Stefan Wahren <stefan.wahren@i2se.com>, Phil Elwell <phil@raspberrypi.org>,
+ bcm-kernel-feedback-list@broadcom.com, Peter Robinson <pbrobinson@gmail.com>,
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+Compiling the bcm283x DTS with W=1 leads to the following warning:
+
+Warning (unit_address_vs_reg): /memory: node has a reg or ranges property,
+but no unit name
+
+Fix this by adding the unit address.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+---
+ arch/arm/boot/dts/bcm2835-rpi.dtsi         | 2 +-
+ arch/arm/boot/dts/bcm2836-rpi-2-b.dts      | 2 +-
+ arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts | 2 +-
+ arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts | 2 +-
+ arch/arm/boot/dts/bcm2837-rpi-3-b.dts      | 2 +-
+ arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi     | 2 +-
+ 6 files changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
+index c6e2b23..e490f2a 100644
+--- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
++++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
+@@ -1,7 +1,7 @@
+ #include <dt-bindings/power/raspberrypi-power.h>
+ 
+ / {
+-	memory {
++	memory@0 {
+ 		device_type = "memory";
+ 		reg = <0 0x10000000>;
+ 	};
+diff --git a/arch/arm/boot/dts/bcm2836-rpi-2-b.dts b/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
+index ac4408b..871fc4a 100644
+--- a/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
++++ b/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
+@@ -9,7 +9,7 @@
+ 	compatible = "raspberrypi,2-model-b", "brcm,bcm2836";
+ 	model = "Raspberry Pi 2 Model B";
+ 
+-	memory {
++	memory@0 {
+ 		reg = <0 0x40000000>;
+ 	};
+ 
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
+index e9fadd3..7f4437a 100644
+--- a/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
++++ b/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts
+@@ -13,7 +13,7 @@
+ 		stdout-path = "serial1:115200n8";
+ 	};
+ 
+-	memory {
++	memory@0 {
+ 		reg = <0 0x20000000>;
+ 	};
+ 
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
+index 42bb090..7d65013 100644
+--- a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
++++ b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
+@@ -14,7 +14,7 @@
+ 		stdout-path = "serial1:115200n8";
+ 	};
+ 
+-	memory {
++	memory@0 {
+ 		reg = <0 0x40000000>;
+ 	};
+ 
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+index 0c155dd..9abb9c5 100644
+--- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
++++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+@@ -14,7 +14,7 @@
+ 		stdout-path = "serial1:115200n8";
+ 	};
+ 
+-	memory {
++	memory@0 {
+ 		reg = <0 0x40000000>;
+ 	};
+ 
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi b/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi
+index 4a89a18..81399b2 100644
+--- a/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi
++++ b/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi
+@@ -4,7 +4,7 @@
+ #include "bcm2836-rpi.dtsi"
+ 
+ / {
+-	memory {
++	memory@0 {
+ 		reg = <0 0x40000000>;
+ 	};
+ 
+
+From patchwork Sat Jan 12 12:43:24 2019
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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>
+Subject: [PATCH 2/6] ARM: dts: bcm2835-rpi: Drop unnecessary
+ #address-cells/#size-cells
+Date: Sat, 12 Jan 2019 13:43:24 +0100
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+Compiling the bcm2835-rpi.dtsi with W=1 leads to the following warning:
+
+Warning (avoid_unnecessary_addr_size): /soc/firmware: unnecessary
+ #address-cells/#size-cells without "ranges" or child "reg" property
+
+Fix this by removing these unnecessary properties.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+---
+ arch/arm/boot/dts/bcm2835-rpi.dtsi | 2 --
+ 1 file changed, 2 deletions(-)
+
+diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
+index e490f2a..715d50c 100644
+--- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
++++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
+@@ -19,8 +19,6 @@
+ 	soc {
+ 		firmware: firmware {
+ 			compatible = "raspberrypi,bcm2835-firmware", "simple-bus";
+-			#address-cells = <0>;
+-			#size-cells = <0>;
+ 			mboxes = <&mailbox>;
+ 		};
+ 
+
+From patchwork Sat Jan 12 12:43:25 2019
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+ id 1N49Qd-1hPmUb47ST-0101Wy; Sat, 12 Jan 2019 13:44:01 +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>
+Subject: [PATCH 3/6] ARM: dts: bcm2835: Fix labels for GPIO 0,1
+Date: Sat, 12 Jan 2019 13:43:25 +0100
+Message-Id: <1547297008-2740-4-git-send-email-stefan.wahren@i2se.com>
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+Cc: Gottfried Haider <gottfried.haider@gmail.com>, devicetree@vger.kernel.org,
+ Stefan Wahren <stefan.wahren@i2se.com>, Phil Elwell <phil@raspberrypi.org>,
+ bcm-kernel-feedback-list@broadcom.com, Peter Robinson <pbrobinson@gmail.com>,
+ linux-arm-kernel@lists.infradead.org, linux-rpi-kernel@lists.infradead.org
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+
+According to the schematics for all RPis with a 40 pin header,
+the GPIOs 0 and 1 are labeled as ID_SD and ID_SC. In order to
+clarify that is a I2C bus, append the third letter.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+---
+ arch/arm/boot/dts/bcm2835-rpi-a-plus.dts | 4 ++--
+ arch/arm/boot/dts/bcm2835-rpi-b-plus.dts | 4 ++--
+ arch/arm/boot/dts/bcm2835-rpi-zero-w.dts | 4 ++--
+ arch/arm/boot/dts/bcm2835-rpi-zero.dts   | 4 ++--
+ 4 files changed, 8 insertions(+), 8 deletions(-)
+
+diff --git a/arch/arm/boot/dts/bcm2835-rpi-a-plus.dts b/arch/arm/boot/dts/bcm2835-rpi-a-plus.dts
+index 2cd9c5e..db8a601 100644
+--- a/arch/arm/boot/dts/bcm2835-rpi-a-plus.dts
++++ b/arch/arm/boot/dts/bcm2835-rpi-a-plus.dts
+@@ -31,8 +31,8 @@
+ 	 * "FOO" = GPIO line named "FOO" on the schematic
+ 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
+ 	 */
+-	gpio-line-names = "SDA0",
+-			  "SCL0",
++	gpio-line-names = "ID_SDA",
++			  "ID_SCL",
+ 			  "SDA1",
+ 			  "SCL1",
+ 			  "GPIO_GCLK",
+diff --git a/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts b/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
+index cfbdaac..1e40d67 100644
+--- a/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
++++ b/arch/arm/boot/dts/bcm2835-rpi-b-plus.dts
+@@ -33,8 +33,8 @@
+ 	 * "FOO" = GPIO line named "FOO" on the schematic
+ 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
+ 	 */
+-	gpio-line-names = "SDA0",
+-			  "SCL0",
++	gpio-line-names = "ID_SDA",
++			  "ID_SCL",
+ 			  "SDA1",
+ 			  "SCL1",
+ 			  "GPIO_GCLK",
+diff --git a/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts b/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
+index 644d907..5765d34 100644
+--- a/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
++++ b/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
+@@ -40,8 +40,8 @@
+ 	 * "FOO" = GPIO line named "FOO" on the schematic
+ 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
+ 	 */
+-	gpio-line-names = "GPIO0",
+-			  "GPIO1",
++	gpio-line-names = "ID_SDA",
++			  "ID_SCL",
+ 			  "SDA1",
+ 			  "SCL1",
+ 			  "GPIO_GCLK",
+diff --git a/arch/arm/boot/dts/bcm2835-rpi-zero.dts b/arch/arm/boot/dts/bcm2835-rpi-zero.dts
+index 00323ba..3b35a8a 100644
+--- a/arch/arm/boot/dts/bcm2835-rpi-zero.dts
++++ b/arch/arm/boot/dts/bcm2835-rpi-zero.dts
+@@ -28,8 +28,8 @@
+ 	 * "FOO" = GPIO line named "FOO" on the schematic
+ 	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
+ 	 */
+-	gpio-line-names = "SDA0",
+-			  "SCL0",
++	gpio-line-names = "ID_SDA",
++			  "ID_SCL",
+ 			  "SDA1",
+ 			  "SCL1",
+ 			  "GPIO_GCLK",
+
+From patchwork Sat Jan 12 12:43:26 2019
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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>
+Subject: [PATCH 4/6] ARM: dts: bcm2837-rpi-3-b: Use consistent label for HDMI
+ hotplug
+Date: Sat, 12 Jan 2019 13:43:26 +0100
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+This make the GPIO label for HDMI hotplug more consistent to the other
+boards.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+---
+ arch/arm/boot/dts/bcm2837-rpi-3-b.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+index 9abb9c5..31b1c03 100644
+--- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
++++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+@@ -39,7 +39,7 @@
+ 				  "WL_ON",
+ 				  "STATUS_LED",
+ 				  "LAN_RUN",
+-				  "HPD_N",
++				  "HDMI_HPD_N",
+ 				  "CAM_GPIO0",
+ 				  "CAM_GPIO1",
+ 				  "PWR_LOW_N";
+
+From patchwork Sat Jan 12 12:43:27 2019
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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>
+Subject: [PATCH 5/6] ARM: dts: bcm2837-rpi-3-b-plus: Clarify label for
+ STATUS_LED
+Date: Sat, 12 Jan 2019 13:43:27 +0100
+Message-Id: <1547297008-2740-6-git-send-email-stefan.wahren@i2se.com>
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+Cc: Gottfried Haider <gottfried.haider@gmail.com>, devicetree@vger.kernel.org,
+ Stefan Wahren <stefan.wahren@i2se.com>, Phil Elwell <phil@raspberrypi.org>,
+ bcm-kernel-feedback-list@broadcom.com, Peter Robinson <pbrobinson@gmail.com>,
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+The RPI 3 B+ provides control to both LEDs (PWR and ACT). So append
+the first letter of the LED color (like in the schematics) in order
+to clarify this.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+---
+ arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
+index 7d65013..d3ec6cd 100644
+--- a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
++++ b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
+@@ -42,7 +42,7 @@
+ 		#gpio-cells = <2>;
+ 		gpio-line-names = "BT_ON",
+ 				  "WL_ON",
+-				  "STATUS_LED",
++				  "STATUS_LED_R",
+ 				  "LAN_RUN",
+ 				  "",
+ 				  "CAM_GPIO0",
+
+From patchwork Sat Jan 12 12:43:28 2019
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+ id 1MdNLi-1hHMPa2aSu-00ZS8f; Sat, 12 Jan 2019 13:44:02 +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>
+Subject: [PATCH 6/6] ARM: dts: bcm283x: Add missing GPIO line names
+Date: Sat, 12 Jan 2019 13:43:28 +0100
+Message-Id: <1547297008-2740-7-git-send-email-stefan.wahren@i2se.com>
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+Cc: Gottfried Haider <gottfried.haider@gmail.com>, devicetree@vger.kernel.org,
+ Stefan Wahren <stefan.wahren@i2se.com>, Phil Elwell <phil@raspberrypi.org>,
+ bcm-kernel-feedback-list@broadcom.com, Peter Robinson <pbrobinson@gmail.com>,
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+
+The GPIO sysfs is deprecated and disabled in the defconfig files.
+So in order to motivate the usage of the new GPIO character device API
+add the missing GPIO line names for Raspberry Pi 2 and 3. In the lack
+of full schematics i would leave all undocumented pins as unnamed.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+---
+ arch/arm/boot/dts/bcm2836-rpi-2-b.dts      | 66 ++++++++++++++++++++++++++++
+ arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts | 70 ++++++++++++++++++++++++++++++
+ arch/arm/boot/dts/bcm2837-rpi-3-b.dts      | 70 ++++++++++++++++++++++++++++++
+ 3 files changed, 206 insertions(+)
+
+diff --git a/arch/arm/boot/dts/bcm2836-rpi-2-b.dts b/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
+index 871fc4a..7b4e651 100644
+--- a/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
++++ b/arch/arm/boot/dts/bcm2836-rpi-2-b.dts
+@@ -28,6 +28,72 @@
+ };
+ 
+ &gpio {
++	/*
++	 * Taken from rpi_SCH_2b_1p2_reduced.pdf and
++	 * the official GPU firmware DT blob.
++	 *
++	 * Legend:
++	 * "NC" = not connected (no rail from the SoC)
++	 * "FOO" = GPIO line named "FOO" on the schematic
++	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
++	 */
++	gpio-line-names = "ID_SDA",
++			  "ID_SCL",
++			  "SDA1",
++			  "SCL1",
++			  "GPIO_GCLK",
++			  "GPIO5",
++			  "GPIO6",
++			  "SPI_CE1_N",
++			  "SPI_CE0_N",
++			  "SPI_MISO",
++			  "SPI_MOSI",
++			  "SPI_SCLK",
++			  "GPIO12",
++			  "GPIO13",
++			  /* Serial port */
++			  "TXD0",
++			  "RXD0",
++			  "GPIO16",
++			  "GPIO17",
++			  "GPIO18",
++			  "GPIO19",
++			  "GPIO20",
++			  "GPIO21",
++			  "GPIO22",
++			  "GPIO23",
++			  "GPIO24",
++			  "GPIO25",
++			  "GPIO26",
++			  "GPIO27",
++			  "SDA0",
++			  "SCL0",
++			  "", /* GPIO30 */
++			  "LAN_RUN",
++			  "CAM_GPIO1",
++			  "", /* GPIO33 */
++			  "", /* GPIO34 */
++			  "PWR_LOW_N",
++			  "", /* GPIO36 */
++			  "", /* GPIO37 */
++			  "USB_LIMIT",
++			  "", /* GPIO39 */
++			  "PWM0_OUT",
++			  "CAM_GPIO0",
++			  "SMPS_SCL",
++			  "SMPS_SDA",
++			  "ETHCLK",
++			  "PWM1_OUT",
++			  "HDMI_HPD_N",
++			  "STATUS_LED",
++			  /* Used by SD Card */
++			  "SD_CLK_R",
++			  "SD_CMD_R",
++			  "SD_DATA0_R",
++			  "SD_DATA1_R",
++			  "SD_DATA2_R",
++			  "SD_DATA3_R";
++
+ 	pinctrl-0 = <&gpioout &alt0 &i2s_alt0>;
+ 
+ 	/* I2S interface */
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
+index d3ec6cd..c6fa34c 100644
+--- a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
++++ b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
+@@ -52,6 +52,76 @@
+ 	};
+ };
+ 
++&gpio {
++	/*
++	 * Taken from rpi_SCH_3bplus_1p0_reduced.pdf and
++	 * the official GPU firmware DT blob.
++	 *
++	 * Legend:
++	 * "NC" = not connected (no rail from the SoC)
++	 * "FOO" = GPIO line named "FOO" on the schematic
++	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
++	 */
++	gpio-line-names = "ID_SDA",
++			  "ID_SCL",
++			  "SDA1",
++			  "SCL1",
++			  "GPIO_GCLK",
++			  "GPIO5",
++			  "GPIO6",
++			  "SPI_CE1_N",
++			  "SPI_CE0_N",
++			  "SPI_MISO",
++			  "SPI_MOSI",
++			  "SPI_SCLK",
++			  "GPIO12",
++			  "GPIO13",
++			  /* Serial port */
++			  "TXD1",
++			  "RXD1",
++			  "GPIO16",
++			  "GPIO17",
++			  "GPIO18",
++			  "GPIO19",
++			  "GPIO20",
++			  "GPIO21",
++			  "GPIO22",
++			  "GPIO23",
++			  "GPIO24",
++			  "GPIO25",
++			  "GPIO26",
++			  "GPIO27",
++			  "HDMI_HPD_N",
++			  "STATUS_LED_G",
++			  /* Used by BT module */
++			  "CTS0",
++			  "RTS0",
++			  "TXD0",
++			  "RXD0",
++			  /* Used by Wifi */
++			  "SD1_CLK",
++			  "SD1_CMD",
++			  "SD1_DATA0",
++			  "SD1_DATA1",
++			  "SD1_DATA2",
++			  "SD1_DATA3",
++			  "PWM0_OUT",
++			  "PWM1_OUT",
++			  "ETHCLK",
++			  "WIFI_CLK",
++			  "SDA0",
++			  "SCL0",
++			  "SMPS_SCL",
++			  "SMPS_SDA",
++			  /* Used by SD Card */
++			  "SD_CLK_R",
++			  "SD_CMD_R",
++			  "SD_DATA0_R",
++			  "SD_DATA1_R",
++			  "SD_DATA2_R",
++			  "SD_DATA3_R";
++};
++
+ &hdmi {
+ 	hpd-gpios = <&gpio 28 GPIO_ACTIVE_LOW>;
+ };
+diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+index 31b1c03..ce71f57 100644
+--- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
++++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+@@ -47,6 +47,76 @@
+ 	};
+ };
+ 
++&gpio {
++	/*
++	 * Taken from rpi_SCH_3b_1p2_reduced.pdf and
++	 * the official GPU firmware DT blob.
++	 *
++	 * Legend:
++	 * "NC" = not connected (no rail from the SoC)
++	 * "FOO" = GPIO line named "FOO" on the schematic
++	 * "FOO_N" = GPIO line named "FOO" on schematic, active low
++	 */
++	gpio-line-names = "ID_SDA",
++			  "ID_SCL",
++			  "SDA1",
++			  "SCL1",
++			  "GPIO_GCLK",
++			  "GPIO5",
++			  "GPIO6",
++			  "SPI_CE1_N",
++			  "SPI_CE0_N",
++			  "SPI_MISO",
++			  "SPI_MOSI",
++			  "SPI_SCLK",
++			  "GPIO12",
++			  "GPIO13",
++			  /* Serial port */
++			  "TXD1",
++			  "RXD1",
++			  "GPIO16",
++			  "GPIO17",
++			  "GPIO18",
++			  "GPIO19",
++			  "GPIO20",
++			  "GPIO21",
++			  "GPIO22",
++			  "GPIO23",
++			  "GPIO24",
++			  "GPIO25",
++			  "GPIO26",
++			  "GPIO27",
++			  "", /* GPIO 28 */
++			  "LAN_RUN_BOOT",
++			  /* Used by BT module */
++			  "CTS0",
++			  "RTS0",
++			  "TXD0",
++			  "RXD0",
++			  /* Used by Wifi */
++			  "SD1_CLK",
++			  "SD1_CMD",
++			  "SD1_DATA0",
++			  "SD1_DATA1",
++			  "SD1_DATA2",
++			  "SD1_DATA3",
++			  "PWM0_OUT",
++			  "PWM1_OUT",
++			  "ETHCLK",
++			  "WIFI_CLK",
++			  "SDA0",
++			  "SCL0",
++			  "SMPS_SCL",
++			  "SMPS_SDA",
++			  /* Used by SD Card */
++			  "SD_CLK_R",
++			  "SD_CMD_R",
++			  "SD_DATA0_R",
++			  "SD_DATA1_R",
++			  "SD_DATA2_R",
++			  "SD_DATA3_R";
++};
++
+ &pwm {
+ 	pinctrl-names = "default";
+ 	pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>;