* Kalle Valo <kalle.valo@xxxxxx> [090613 09:45]:
> Aaro Koskinen <aaro.koskinen@xxxxxxxxx> writes:
>
> > From: Eero Nurkkala <ext-eero.nurkkala@xxxxxxxxx>
> >
> > When data is read through DMA, the last element must be read separately
> > through the RX register. It cannot be transferred by the DMA. For further
> > details see e.g. OMAP3430 TRM.
> >
> > Without the fix the driver causes extra clocks to be clocked to the
> > bus after DMA RX operations. This can cause interesting behaviour with
> > some devices.
>
> I was hit by this with stlc45xx and earlier versions of Juuso's patch at
> least fixed the problem.
>
> I will test this patch as soon as I get N800 boot with latest
> linux-omap, now I only get this:
>
> <6>JFFS2 version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
> <6>JFFS2 version 2.2. (NAND) (SUMMARY) © 2001-2006 Red H
> <6>msgmni has been set to 247
> <6>io scheduler noop registered (default)
> <6>omapfb: ls041y3 rev 87 LCD detected, 0 data lines d
> <6>serial8250.0: ttyS0 at MMIO 0x4806a000 (irq = 72) is a ST16654
> <6>serial8250.0: ttyS1 at MMIO 0x4806e000 (irq = 74) is a ST16654
> <ó"F:5 #!*$Õ<ó¬#05 #!*$Õ<ór%
> µ²² æ2Õ<ó$¶ #®*#5##¹'%Õ<ó#62°$¶ ¹)K!¥º¹'Õ<ó¬¹5 K#z 0«²)Ñ%f¡T:6æ0ªÿ<ó¯
> ó
> %°ö2Õ³#²©T ô#.#É ,#2¬#£µ0V³/5 V§Í#%Rí<ó00¢F ô- ¹##£$¶ +3Sí<ó
> 0
> ·#
> # V60±:)¥#
> ,#µ¥Õ46 V#Õ#
> ¬é)¶.¹ªÿ<óµ&£É%²:©F%V$®º ¹##£$¶
> Í#É¡*ªÿ<óµ& ©#0Á:£µ.#µ¥Õ4#Ô#Kªÿ#ó#Í!Ä)
> %
> ³3{%°ö2±9±Sí<ó"Õ {/+#í#ó#Í!Ä)4?+#í#ó#Í!Ä)4ó ö£U4¬¹ ¹)K!)º"ªÿ<ó"Õ%{/C:³ô
> Ù¯ s
> ®Ñ ®®Ò 335<#U2,°®!Ä) ô2V#"ö/ë"¢#4/##®#%!V C%!
Might be related to the omap specific ATAGs now gone, sorry but that
just had to go to get things in sync. And it should not come as a
surprise as it's been discussed over past few years :)
The missing data needs to be initialized in platform_data, cmdline,
ARM generic ATAGs, upcoming device tree.. I suggest using platform_data
where possible. The GPIO values etc coming from nolo can be dumped
with some earlier kernel using CONFIG_ATAGS_PROC.
BTW, I'll move the n8x0 board-*.c files around a bit to have just
board-n800.c, board-n810.c and board-n8x0-peripherals.c.
Regards,
Tony
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
