openwrtv3/target/linux/brcm2708/patches-4.4/0013-ARM-bcm2835-Set-Serial-number-and-Revision.patch
Felix Fietkau 4224b52c3a brcm2708: add linux 4.4 support
- random-bcm2708 and spi-bcm2708 have been removed.
- sound-soc-bcm2708-i2s has been upstreamed as sound-soc-bcm2835-i2s.

Let's keep linux 4.1 for a while, since linux 4.4 appears to have some issues
with multicast traffic on RPi ethernet:
https://gist.github.com/Noltari/5b1cfdecce5ed4bc08fd

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

SVN-Revision: 48266
2016-01-17 10:42:23 +00:00

58 lines
1.7 KiB
Diff

From e04c4837cde13f4782fc5a274599f580d8a29715 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 013/127] 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 | 9 +++++++++
1 file changed, 9 insertions(+)
--- a/arch/arm/mach-bcm/board_bcm2835.c
+++ b/arch/arm/mach-bcm/board_bcm2835.c
@@ -17,12 +17,16 @@
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/clk/bcm2835.h>
+#include <asm/system_info.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
static void __init bcm2835_init(void)
{
+ struct device_node *np = of_find_node_by_path("/system");
+ u32 val;
+ u64 val64;
int ret;
bcm2835_init_clocks();
@@ -33,6 +37,11 @@ static void __init bcm2835_init(void)
pr_err("of_platform_populate failed: %d\n", ret);
BUG();
}
+
+ 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[] = {