[PATCH 6/6] PCM038: Read UID from fuses and pass this value to kernel as serial number
Sascha Hauer
s.hauer at pengutronix.de
Thu Jul 19 14:12:52 EDT 2012
On Thu, Jul 19, 2012 at 07:30:17PM +0400, Alexander Shiyan wrote:
>
> Signed-off-by: Alexander Shiyan <shc_work at mail.ru>
> ---
> arch/arm/boards/pcm038/pcm038.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/boards/pcm038/pcm038.c b/arch/arm/boards/pcm038/pcm038.c
> index 5b0afc3..1bdb93c 100644
> --- a/arch/arm/boards/pcm038/pcm038.c
> +++ b/arch/arm/boards/pcm038/pcm038.c
> @@ -40,6 +40,7 @@
> #include <mach/spi.h>
> #include <mach/iomux-mx27.h>
> #include <mach/devices-imx27.h>
> +#include <mach/iim.h>
> #include <mfd/mc13xxx.h>
>
> #include "pll.h"
> @@ -193,6 +194,7 @@ mem_initcall(pcm038_mem_init);
> static int pcm038_devices_init(void)
> {
> int i;
> + u64 uid;
The upper two bytes of uid are used unitialized.
> char *envdev;
>
> unsigned int mode[] = {
> @@ -316,6 +318,8 @@ static int pcm038_devices_init(void)
>
> printf("Using environment in %s Flash\n", envdev);
>
> + if (imx_iim_read(1, 1, &uid, 6) == 6)
> + armlinux_set_serial(uid);
With this patch I just realized that my serial becomes:
-6345008925011607552
Having negative numbers here is a bit odd. Looking at it export_env_ull
does:
char *valstr = asprintf("%lld", val);
Which clearly is a signed number. Maybe this should be changed to "0x%016llx"
(which of course is not your fault)
Sascha
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