diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0103-ARM-bcm2835-Set-Serial-number-and-Revision.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0103-ARM-bcm2835-Set-Serial-number-and-Revision.patch | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0103-ARM-bcm2835-Set-Serial-number-and-Revision.patch b/target/linux/brcm2708/patches-4.19/950-0103-ARM-bcm2835-Set-Serial-number-and-Revision.patch new file mode 100644 index 0000000000..b0e4152fc4 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0103-ARM-bcm2835-Set-Serial-number-and-Revision.patch @@ -0,0 +1,63 @@ +From 6eb5a426229447a1045507fb63afdb11ddc5eda4 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 +@@ -15,12 +15,25 @@ + #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", +@@ -33,6 +46,7 @@ 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 |