On Mon, Oct 12, 2009 at 5:51 PM, Peter 'p2' De Schrijver
<peter.de-schrij...@nokia.com> wrote:
> From: De-Schrijver Peter (Nokia-D/Helsinki) <peter.de-schrij...@nokia.com>
>
> This patch exports the OMAP3 IDCODE, Production ID and Die ID to userspace via
> sysfs. This can be used to track down silicon specific issues. The info is
> exported via sysfs because it should be possible to include this in corematic
> dumps.
>
> Signed-off-by: Peter 'p2' De Schrijver <peter.de-schrij...@nokia.com>
> ---
> arch/arm/mach-omap2/id.c | 36 ++++++++++++++++++++++++++++++++++++
> 1 files changed, 36 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
> index 2c5e0a3..97670e2 100644
> --- a/arch/arm/mach-omap2/id.c
> +++ b/arch/arm/mach-omap2/id.c
> @@ -70,6 +70,10 @@ EXPORT_SYMBOL(omap_type);
> /*----------------------------------------------------------------------------*/
>
> #define OMAP_TAP_IDCODE 0x0204
> +#define OMAP_TAP_PROD_ID_0 0x0208
> +#define OMAP_TAP_PROD_ID_1 0x020c
> +#define OMAP_TAP_PROD_ID_2 0x0210
> +#define OMAP_TAP_PROD_ID_3 0x0214
> #define OMAP_TAP_DIE_ID_0 0x0218
> #define OMAP_TAP_DIE_ID_1 0x021C
> #define OMAP_TAP_DIE_ID_2 0x0220
> @@ -77,6 +81,10 @@ EXPORT_SYMBOL(omap_type);
>
> #define read_tap_reg(reg) __raw_readl(tap_base + (reg))
>
> +static ssize_t idcode_show(struct kobject *, struct kobj_attribute *, char
> *);
> +static struct kobj_attribute idcode_attr = __ATTR(idcode, 0444, idcode_show,
> + NULL);
> +
> struct omap_id {
> u16 hawkeye; /* Silicon type (Hawkeye id) */
> u8 dev; /* Device type from production_id reg */
> @@ -96,6 +104,23 @@ static struct omap_id omap_ids[] __initdata = {
> static void __iomem *tap_base;
> static u16 tap_prod_id;
>
> +static ssize_t idcode_show(struct kobject *kobj, struct kobj_attribute *attr,
> + char *buf)
> +{
> + return sprintf(buf, "IDCODE: %08x\nProduction ID: %08x %08x %08x
> %08x\n"
> + "Die ID: %08x %08x %08x %08x\n",
> + read_tap_reg(OMAP_TAP_IDCODE),
> + read_tap_reg(OMAP_TAP_PROD_ID_0),
> + read_tap_reg(OMAP_TAP_PROD_ID_1),
> + read_tap_reg(OMAP_TAP_PROD_ID_2),
> + read_tap_reg(OMAP_TAP_PROD_ID_3),
> + read_tap_reg(OMAP_TAP_DIE_ID_0),
> + read_tap_reg(OMAP_TAP_DIE_ID_1),
> + read_tap_reg(OMAP_TAP_DIE_ID_2),
> + read_tap_reg(OMAP_TAP_DIE_ID_3));
> +
> +}
> +
> void __init omap24xx_check_revision(void)
> {
> int i, j;
> @@ -259,3 +284,14 @@ void __init omap2_set_globals_tap(struct omap_globals
> *omap2_globals)
> else
> tap_prod_id = 0x0208;
> }
> +
> +void __init export_omapid(void)
> +{
> + int error;
> +
> + error = sysfs_create_file(power_kobj, &idcode_attr.attr);
This will not build when CONFIG_PM is off; power_kobj will not be available.
> + if (error)
> + printk(KERN_ERR "sysfs_create_file failed: %d\n", error);
> +}
> +
> +late_initcall(export_omapid);
> --
--
Felipe Contreras
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