u-boot: Update patches for RPi4ag/rpi4-uboot-update

After a review in upstream, some of the patches were modified. Most
notable changes:
1. use directly the dtb passed by the firmware and make sure uboot
doesn't tweak memory/reg
2. remove known unimplemented support (usb, eth etc.)
3. drop patches that are not needed anymore with the new firmware update
(for example 0012-bcm283x-mbox-Correctly-wait-for-space-to-send.patch)

Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>

1 files changed, 109 insertions, 0 deletions

diff --git a/recipes-bsp/u-boot/u-boot-2019.07/0003-arm-mach-bcm283x-Define-configs-for-RaspberryPi-4.patch b/recipes-bsp/u-boot/u-boot-2019.07/0003-arm-mach-bcm283x-Define-configs-for-RaspberryPi-4.patch
new file mode 100644
index 0000000..5b6361f
--- /dev/null
+++ b/recipes-bsp/u-boot/u-boot-2019.07/0003-arm-mach-bcm283x-Define-configs-for-RaspberryPi-4.patch
@@ -0,0 +1,109 @@
+From 066b17eb645d2779a8fb30bd83d48af9ceae871c Mon Sep 17 00:00:00 2001
+From: Andrei Gherzan <andrei@balena.io>
+Date: Wed, 17 Jul 2019 15:33:01 +0100
+Subject: [PATCH 3/7] arm: mach-bcm283x: Define configs for RaspberryPi 4
+
+Define two target configs for Raspberry Pi 4 (32 and 64bit) and the
+corresponding BCM2838* configs.
+
+Be aware of the current limitation in firmware which requires an
+explicit configuration to force the arm in 64bit mode when the
+respective target is used:
+https://github.com/raspberrypi/firmware/issues/1193
+
+Signed-off-by: Andrei Gherzan <andrei@balena.io>
+Signed-off-by: Matthias Brugger <mbrugger@suse.com>
+Upstream-status: Pending
+---
+ arch/arm/mach-bcm283x/Kconfig | 62 +++++++++++++++++++++++++++++++++++
+ 1 file changed, 62 insertions(+)
+
+diff --git a/arch/arm/mach-bcm283x/Kconfig b/arch/arm/mach-bcm283x/Kconfig
+index 8e69914a83..09a5b42bbb 100644
+--- a/arch/arm/mach-bcm283x/Kconfig
++++ b/arch/arm/mach-bcm283x/Kconfig
+@@ -26,6 +26,23 @@ config BCM2837_64B
+        select BCM2837
+        select ARM64
+ 
++config BCM2838
++       bool "Broadcom BCM2838 SoC support"
++       depends on ARCH_BCM283X
++
++config BCM2838_32B
++       bool "Broadcom BCM2838 SoC 32-bit support"
++       depends on ARCH_BCM283X
++       select BCM2838
++       select ARMV7_LPAE
++       select CPU_V7A
++
++config BCM2838_64B
++       bool "Broadcom BCM2838 SoC 64-bit support"
++       depends on ARCH_BCM283X
++       select BCM2838
++       select ARM64
++
+ menu "Broadcom BCM283X family"
+        depends on ARCH_BCM283X
+ 
+@@ -127,6 +144,50 @@ config TARGET_RPI_3
+          This option creates a build targeting the ARMv8/AArch64 ISA.
+        select BCM2837_64B
+ 
++config TARGET_RPI_4_32B
++       bool "Raspberry Pi 4 32-bit build"
++       help
++         Support for all BCM2838-based Raspberry Pi variants, such as
++         the RPi 4 model B, in AArch32 (32-bit) mode.
++
++         This option assumes the VideoCore firmware is configured to use the
++         mini UART (rather than PL011) for the serial console. This is the
++         default on the RPi 4. To enable the UART console, the following non-
++         default option must be present in config.txt: enable_uart=1. This is
++         required for U-Boot to operate correctly, even if you only care
++         about the HDMI/usbkbd console.
++
++         Due to hardware incompatibilities, this can't be used with
++         BCM283/5/6/7.
++
++         This option creates a build targeting the ARMv7/AArch32 ISA.
++       select BCM2838_32B
++
++config TARGET_RPI_4
++       bool "Raspberry Pi 4 64-bit build"
++       help
++         Support for all BCM2838-based Raspberry Pi variants, such as
++         the RPi 4 model B, in AArch64 (64-bit) mode.
++
++         This option assumes the VideoCore firmware is configured to use the
++         mini UART (rather than PL011) for the serial console. This is the
++         default on the RPi 4. To enable the UART console, the following non-
++         default option must be present in config.txt: enable_uart=1. This is
++         required for U-Boot to operate correctly, even if you only care
++         about the HDMI/usbkbd console.
++
++         Due to hardware incompatibilities, this can't be used with
++         BCM283/5/6/7.
++
++         Also, due to a bug in firmware, switching to 64bit mode doesn't
++         happen automatically based on the kernel's image filename. See
++         https://github.com/raspberrypi/firmware/issues/1193 for more details.
++         Until that is resolved, the configuration (config.txt) needs to
++         explicitly set: arm_64bit=1.
++
++         This option creates a build targeting the ARMv8/AArch64 ISA.
++       select BCM2838_64B
++
+ endchoice
+ 
+ config SYS_BOARD
+@@ -145,5 +206,6 @@ config BCM283x_BASE
+        hex
+        default "0x20000000" if BCM2835
+        default "0x3f000000" if BCM2836 || BCM2837
++       default "0xfe000000" if BCM2838
+ 
+ endmenu
+-- 
+2.22.0
+