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ARM: bcm2835: Set Serial number and Revision

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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>
This commit is contained in:
Noralf Trønnes
2015-06-03 12:26:13 +02:00
committed by popcornmix
parent 45006d28c7
commit 48a3b68b74
1 changed files with 14 additions and 0 deletions
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14
arch/arm/mach-bcm/board_bcm2835.c
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@@ -6,12 +6,25 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/irqchip.h> #include <linux/irqchip.h>
#include <linux/of_address.h> #include <linux/of_address.h>
#include <asm/system_info.h>
#include <asm/mach/arch.h> #include <asm/mach/arch.h>
#include <asm/mach/map.h> #include <asm/mach/map.h>
#include "platsmp.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[] = { static const char * const bcm2835_compat[] = {
#ifdef CONFIG_ARCH_MULTI_V6 #ifdef CONFIG_ARCH_MULTI_V6
"brcm,bcm2835", "brcm,bcm2835",
@@ -24,6 +37,7 @@ static const char * const bcm2835_compat[] = {
}; };
DT_MACHINE_START(BCM2835, "BCM2835") DT_MACHINE_START(BCM2835, "BCM2835")
.init_machine = bcm2835_init,
.dt_compat = bcm2835_compat, .dt_compat = bcm2835_compat,
.smp = smp_ops(bcm2836_smp_ops), .smp = smp_ops(bcm2836_smp_ops),
MACHINE_END MACHINE_END