bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 150 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0971-overlays-Add-note-to-BCM2711-overlays.patch b/target/linux/bcm27xx/patches-5.4/950-0971-overlays-Add-note-to-BCM2711-overlays.patch
new file mode 100644
index 0000000000..3cf76d0934
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0971-overlays-Add-note-to-BCM2711-overlays.patch
@@ -0,0 +1,150 @@
+From b2e311257e8c06f5d39004515c4adb65bb4fad3f Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Mon, 21 Sep 2020 22:09:40 +0100
+Subject: [PATCH] overlays: Add note to BCM2711 overlays
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/README | 32 +++++++++++++++----------------
+ 1 file changed, 16 insertions(+), 16 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1403,7 +1403,7 @@ Load:   <Deprecated>
+ 
+ 
+ Name:   i2c3
+-Info:   Enable the i2c3 bus
++Info:   Enable the i2c3 bus. BCM2711 only.
+ Load:   dtoverlay=i2c3,<param>
+ Params: pins_2_3                Use GPIOs 2 and 3
+         pins_4_5                Use GPIOs 4 and 5 (default)
+@@ -1412,7 +1412,7 @@ Params: pins_2_3                Use GPIO
+ 
+ 
+ Name:   i2c4
+-Info:   Enable the i2c4 bus
++Info:   Enable the i2c4 bus. BCM2711 only.
+ Load:   dtoverlay=i2c4,<param>
+ Params: pins_6_7                Use GPIOs 6 and 7
+         pins_8_9                Use GPIOs 8 and 9 (default)
+@@ -1421,7 +1421,7 @@ Params: pins_6_7                Use GPIO
+ 
+ 
+ Name:   i2c5
+-Info:   Enable the i2c5 bus
++Info:   Enable the i2c5 bus. BCM2711 only.
+ Load:   dtoverlay=i2c5,<param>
+ Params: pins_10_11              Use GPIOs 10 and 11
+         pins_12_13              Use GPIOs 12 and 13 (default)
+@@ -1430,7 +1430,7 @@ Params: pins_10_11              Use GPIO
+ 
+ 
+ Name:   i2c6
+-Info:   Enable the i2c6 bus
++Info:   Enable the i2c6 bus. BCM2711 only.
+ Load:   dtoverlay=i2c6,<param>
+ Params: pins_0_1                Use GPIOs 0 and 1
+         pins_22_23              Use GPIOs 22 and 23 (default)
+@@ -2582,7 +2582,7 @@ Params: cs0_pin                 GPIO pin
+ Name:   spi3-1cs
+ Info:   Enables spi3 with a single chip select (CS) line and associated spidev
+         dev node. The gpio pin number for the CS line and spidev device node
+-        creation are configurable.
++        creation are configurable. BCM2711 only.
+ Load:   dtoverlay=spi3-1cs,<param>=<val>
+ Params: cs0_pin                 GPIO pin for CS0 (default 0 - BCM SPI3_CE0).
+         cs0_spidev              Set to 'off' to prevent the creation of a
+@@ -2593,7 +2593,7 @@ Params: cs0_pin                 GPIO pin
+ Name:   spi3-2cs
+ Info:   Enables spi3 with two chip select (CS) lines and associated spidev
+         dev nodes. The gpio pin numbers for the CS lines and spidev device node
+-        creation are configurable.
++        creation are configurable. BCM2711 only.
+ Load:   dtoverlay=spi3-2cs,<param>=<val>
+ Params: cs0_pin                 GPIO pin for CS0 (default 0 - BCM SPI3_CE0).
+         cs1_pin                 GPIO pin for CS1 (default 24 - BCM SPI3_CE1).
+@@ -2608,7 +2608,7 @@ Params: cs0_pin                 GPIO pin
+ Name:   spi4-1cs
+ Info:   Enables spi4 with a single chip select (CS) line and associated spidev
+         dev node. The gpio pin number for the CS line and spidev device node
+-        creation are configurable.
++        creation are configurable. BCM2711 only.
+ Load:   dtoverlay=spi4-1cs,<param>=<val>
+ Params: cs0_pin                 GPIO pin for CS0 (default 4 - BCM SPI4_CE0).
+         cs0_spidev              Set to 'off' to prevent the creation of a
+@@ -2619,7 +2619,7 @@ Params: cs0_pin                 GPIO pin
+ Name:   spi4-2cs
+ Info:   Enables spi4 with two chip select (CS) lines and associated spidev
+         dev nodes. The gpio pin numbers for the CS lines and spidev device node
+-        creation are configurable.
++        creation are configurable. BCM2711 only.
+ Load:   dtoverlay=spi4-2cs,<param>=<val>
+ Params: cs0_pin                 GPIO pin for CS0 (default 4 - BCM SPI4_CE0).
+         cs1_pin                 GPIO pin for CS1 (default 25 - BCM SPI4_CE1).
+@@ -2634,7 +2634,7 @@ Params: cs0_pin                 GPIO pin
+ Name:   spi5-1cs
+ Info:   Enables spi5 with a single chip select (CS) line and associated spidev
+         dev node. The gpio pin numbers for the CS lines and spidev device node
+-        creation are configurable.
++        creation are configurable. BCM2711 only.
+ Load:   dtoverlay=spi5-1cs,<param>=<val>
+ Params: cs0_pin                 GPIO pin for CS0 (default 12 - BCM SPI5_CE0).
+         cs0_spidev              Set to 'off' to prevent the creation of a
+@@ -2645,7 +2645,7 @@ Params: cs0_pin                 GPIO pin
+ Name:   spi5-2cs
+ Info:   Enables spi5 with two chip select (CS) lines and associated spidev
+         dev nodes. The gpio pin numbers for the CS lines and spidev device node
+-        creation are configurable.
++        creation are configurable. BCM2711 only.
+ Load:   dtoverlay=spi5-2cs,<param>=<val>
+ Params: cs0_pin                 GPIO pin for CS0 (default 12 - BCM SPI5_CE0).
+         cs1_pin                 GPIO pin for CS1 (default 26 - BCM SPI5_CE1).
+@@ -2660,7 +2660,7 @@ Params: cs0_pin                 GPIO pin
+ Name:   spi6-1cs
+ Info:   Enables spi6 with a single chip select (CS) line and associated spidev
+         dev node. The gpio pin number for the CS line and spidev device node
+-        creation are configurable.
++        creation are configurable. BCM2711 only.
+ Load:   dtoverlay=spi6-1cs,<param>=<val>
+ Params: cs0_pin                 GPIO pin for CS0 (default 18 - BCM SPI6_CE0).
+         cs0_spidev              Set to 'off' to prevent the creation of a
+@@ -2671,7 +2671,7 @@ Params: cs0_pin                 GPIO pin
+ Name:   spi6-2cs
+ Info:   Enables spi6 with two chip select (CS) lines and associated spidev
+         dev nodes. The gpio pin numbers for the CS lines and spidev device node
+-        creation are configurable.
++        creation are configurable. BCM2711 only.
+ Load:   dtoverlay=spi6-2cs,<param>=<val>
+ Params: cs0_pin                 GPIO pin for CS0 (default 18 - BCM SPI6_CE0).
+         cs1_pin                 GPIO pin for CS1 (default 27 - BCM SPI6_CE1).
+@@ -2843,25 +2843,25 @@ Params: txd1_pin                GPIO pin
+ 
+ 
+ Name:   uart2
+-Info:   Enable uart 2 on GPIOs 0-3
++Info:   Enable uart 2 on GPIOs 0-3. BCM2711 only.
+ Load:   dtoverlay=uart2,<param>
+ Params: ctsrts                  Enable CTS/RTS on GPIOs 2-3 (default off)
+ 
+ 
+ Name:   uart3
+-Info:   Enable uart 3 on GPIOs 4-7
++Info:   Enable uart 3 on GPIOs 4-7. BCM2711 only.
+ Load:   dtoverlay=uart3,<param>
+ Params: ctsrts                  Enable CTS/RTS on GPIOs 6-7 (default off)
+ 
+ 
+ Name:   uart4
+-Info:   Enable uart 4 on GPIOs 8-11
++Info:   Enable uart 4 on GPIOs 8-11. BCM2711 only.
+ Load:   dtoverlay=uart4,<param>
+ Params: ctsrts                  Enable CTS/RTS on GPIOs 10-11 (default off)
+ 
+ 
+ Name:   uart5
+-Info:   Enable uart 5 on GPIOs 12-15
++Info:   Enable uart 5 on GPIOs 12-15. BCM2711 only.
+ Load:   dtoverlay=uart5,<param>
+ Params: ctsrts                  Enable CTS/RTS on GPIOs 14-15 (default off)
+