Re: [RFC PATCH 2/5] OMAP2+: add cpu id register to MAC address helper
From: Roger Quadros <hidden>
Date: 2011-03-18 08:52:59
Also in:
linux-arm-kernel, lkml
On 03/13/2011 12:50 AM, ext Andy Green wrote:
quoted hunk ↗ jump to hunk
Introduce a generic helper function that can set a MAC address using data from the OMAP unqiue CPU ID register. Signed-off-by: Andy Green <redacted> --- arch/arm/mach-omap2/id.c | 13 +++++++++++++ arch/arm/mach-omap2/include/mach/id.h | 1 + 2 files changed, 14 insertions(+), 0 deletions(-)diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c index 5f9086c..fc69ec5 100644 --- a/arch/arm/mach-omap2/id.c +++ b/arch/arm/mach-omap2/id.c@@ -506,3 +506,16 @@ void __init omap2_set_globals_tap(struct omap_globals *omap2_globals) else tap_prod_id = 0x0208; } + + +void omap2_die_id_to_mac(u8 *mac, int length) +{ + struct omap_die_id odi; + + omap_get_die_id(&odi); + memcpy(mac, &odi.id_0, length); + + /* mark it as not multicast and outside official 80211 MAC namespace */ + + mac[0] = (mac[0] & ~1) | 2; +}diff --git a/arch/arm/mach-omap2/include/mach/id.h b/arch/arm/mach-omap2/include/mach/id.h index 02ed3aa..72e10eb 100644 --- a/arch/arm/mach-omap2/include/mach/id.h +++ b/arch/arm/mach-omap2/include/mach/id.h@@ -18,5 +18,6 @@ struct omap_die_id { };
so here lies the answer to my question "From where do you get the MAC" :) Is there a guarantee that this MAC will work in all Ethernet setups? -- regards, -roger -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html