bcm27xx: add linux 5.4 support

Tested on bcm2710 (Raspberry Pi 3B).

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

1 files changed, 63 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0090-ARM-bcm2835-Set-Serial-number-and-Revision.patch b/target/linux/bcm27xx/patches-5.4/950-0090-ARM-bcm2835-Set-Serial-number-and-Revision.patch
new file mode 100644
index 0000000000..c866f81b9c
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0090-ARM-bcm2835-Set-Serial-number-and-Revision.patch
@@ -0,0 +1,63 @@
+From 2ccf1246eb5ae4faad4cccc01b16f51d7717609e Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
+Date: Wed, 3 Jun 2015 12:26:13 +0200
+Subject: [PATCH] ARM: bcm2835: Set Serial number and Revision
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The VideoCore bootloader passes in Serial number and
+Revision number through Device Tree. Make these available to
+userspace through /proc/cpuinfo.
+
+Mainline status:
+
+There is a commit in linux-next that standardize passing the serial
+number through Device Tree (string: /serial-number):
+ARM: 8355/1: arch: Show the serial number from devicetree in cpuinfo
+
+There was an attempt to do the same with the revision number, but it
+didn't get in:
+[PATCH v2 1/2] arm: devtree: Set system_rev from DT revision
+
+Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
+---
+ arch/arm/mach-bcm/board_bcm2835.c | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+--- a/arch/arm/mach-bcm/board_bcm2835.c
++++ b/arch/arm/mach-bcm/board_bcm2835.c
+@@ -6,12 +6,25 @@
+ #include <linux/init.h>
+ #include <linux/irqchip.h>
+ #include <linux/of_address.h>
++#include <asm/system_info.h>
+ 
+ #include <asm/mach/arch.h>
+ #include <asm/mach/map.h>
+ 
+ #include "platsmp.h"
+ 
++static void __init bcm2835_init(void)
++{
++	struct device_node *np = of_find_node_by_path("/system");
++	u32 val;
++	u64 val64;
++
++	if (!of_property_read_u32(np, "linux,revision", &val))
++		system_rev = val;
++	if (!of_property_read_u64(np, "linux,serial", &val64))
++		system_serial_low = val64;
++}
++
+ static const char * const bcm2835_compat[] = {
+ #ifdef CONFIG_ARCH_MULTI_V6
+ 	"brcm,bcm2835",
+@@ -24,6 +37,7 @@ static const char * const bcm2835_compat
+ };
+ 
+ DT_MACHINE_START(BCM2835, "BCM2835")
++	.init_machine = bcm2835_init,
+ 	.dt_compat = bcm2835_compat,
+ 	.smp = smp_ops(bcm2836_smp_ops),
+ MACHINE_END