On Thu, Aug 12, 2010 at 2:03 AM, Jarkko Nikula <jhnikula@xxxxxxxxx> wrote:
> Hi
>
> On Wed, 11 Aug 2010 18:37:40 -0500
> Robert Nelson <robertcnelson@xxxxxxxxx> wrote:
>
>> Due to the omap3530 ES3.0 Silicon being used on both the
>> B5/B6 and C1/2/3 Beagle we can't use the cpu_is_omap34xx()
>> routines to differentiate the Beagle Boards.
>>
>> However gpio pins 171,172,173 where setup for this prupose, so
>> lets use them.
>>
>> Tested on Beagle Revisions: B5, C2, C4, and xMA
>>
>> Signed-off-by: Robert Nelson <robertcnelson@xxxxxxxxx>
>> ---
>> arch/arm/mach-omap2/board-omap3beagle.c | 60 +++++++++++++++++++++++++++++++
>> arch/arm/plat-omap/include/plat/board.h | 23 ++++++++++++
>> 2 files changed, 83 insertions(+), 0 deletions(-)
>>
> ...
>> + beagle_rev = gpio_get_value(171) | (gpio_get_value(172) << 1)
>> + | (gpio_get_value(173) << 2);
>> +
>> + switch (beagle_rev) {
>> + case 7:
>> + printk(KERN_INFO "OMAP3 Beagle Rev: Ax/Bx\n");
>> + omap3_beagle_version = OMAP3BEAGLE_BOARD_AXBX;
>> + break;
>> + case 6:
>> + printk(KERN_INFO "OMAP3 Beagle Rev: C1/C2/C3\n");
>> + omap3_beagle_version = OMAP3BEAGLE_BOARD_C1_3;
>> + break;
>> + case 5:
>> + printk(KERN_INFO "OMAP3 Beagle Rev: C4\n");
>> + omap3_beagle_version = OMAP3BEAGLE_BOARD_C4;
>> + break;
>> + case 0:
>> + printk(KERN_INFO "OMAP3 Beagle Rev: xM\n");
>> + omap3_beagle_version = OMAP3BEAGLE_BOARD_XM;
>> + break;
>> + default:
>> + printk(KERN_INFO "OMAP3 Beagle Rev: unknown %hd\n", beagle_rev);
>> + omap3_beagle_version = OMAP3BEAGLE_BOARD_XM;
>> + }
>
> My C2 reads as 2 and I have U-Boot 2009.01-dirty (Feb 19 2009 -
> 12:22:31). I believe these pins are not muxed correctly with that
> U-Boot version.
Thanks for testing Jarkko, i had been using U-Boot 2010.03.. So it
looked like we could use the more generic gpio routines, but i'll swap
to the omap_mux_init_gpio and retest on my systems..
>
> Therefore kernel should remux those pins so that version is detected
> right independently of bootloader version. Detections works fine if I
> add these:
>
> omap_mux_init_gpio(171, OMAP_PIN_INPUT_PULLUP);
> omap_mux_init_gpio(172, OMAP_PIN_INPUT_PULLUP);
> omap_mux_init_gpio(173, OMAP_PIN_INPUT_PULLUP);
>
>
> --
> Jarkko
>
--
Robert Nelson
http://www.rcn-ee.com/
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