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- From 1c2be61a1a6e2eb7cc8b337d732563609f5d8299 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 013/381] 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[] = {
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