Messages in this thread | | | Date | Fri, 20 Feb 2015 12:09:44 +0100 (CET) | From | Stefan Wahren <> | Subject | Re: [PATCH V2 RESEND] clk: mxs: Fix invalid 32-bit access to frac registers |
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Hi Fabio,
> Stefan Wahren <stefan.wahren@i2se.com> hat am 11. Februar 2015 um 21:31 > geschrieben: > > > Hi Fabio, > > > Fabio Estevam <festevam@gmail.com> hat am 11. Februar 2015 um 17:58 > > geschrieben: > > > > > > Hi Stefan, > > > > On Tue, Feb 10, 2015 at 7:24 PM, Stefan Wahren <stefan.wahren@i2se.com> > > wrote: > > > Hi Fabio, > > > > > >> Fabio Estevam <festevam@gmail.com> hat am 10. Februar 2015 um 16:06 > > >> geschrieben: > > >> > > >> > > >> Hi Stefan, > > >> > > >> On Tue, Feb 10, 2015 at 11:55 AM, Stefan Wahren <stefan.wahren@i2se.com> > > >> wrote: > > >> > > >> > Could you apply only the clk-imx28.c part of my patch and see what > > >> > happens? > > >> > > >> If I apply only the clk-imx28.c part of your patch I can successfully > > >> probe the SPI NOR. > > > > > > thanks this is very helpful. I built the linux-next for my Duckbill and > > > add > > > the > > > SSP2 section from imx28-evk.dts into imx28-duckbill.dts. > > > > > > Without my patch i get the following for HW_CLKCTRL_FRAC0: > > > > > > ./memwatch -a 0x800401B0 > > > > > > 0x800401b0: 0x5e5b5513 > > > > > > With my patch i get: > > > > > > ./memwatch -a 0x800401B0 > > > > > > 0x800401b0: 0x5e1b5513 > > > > I always get 0x5e5b5513 with or without your patch. > > very strange. Do you have any idea why IO1_STABLE is permanent low? > > Here are the register dumps as requested by Mike. > > Without this patch after boot > > 0x80040000: 0x00060000 > 0x80040010: 0x800004b1 > 0x80040050: 0x00011001 > 0x80040080: 0x64000001 > 0x80040090: 0x00000001 > 0x800400a0: 0x80000001 > 0x800400b0: 0x00000002 > 0x800400c0: 0xa0000001 > 0x800401b0: 0x5e5b5513 > 0x800401c0: 0x00929292 > 0x800401d0: 0x00004104 > > With this patch after boot > > 0x80040000: 0x00060000 > 0x80040010: 0x800004b1 > 0x80040050: 0x00011001 > 0x80040080: 0x64000001 > 0x80040090: 0x00000001 > 0x800400a0: 0x80000001 > 0x800400b0: 0x00000002 > 0x800400c0: 0xa0000001 > 0x800401b0: 0x5e1b5513 > 0x800401c0: 0x00929292 > 0x800401d0: 0x00004104
just for the records here is the register dump for the case "patch V2 on Duckbill with U-Boot instead of imx-bootlets":
0x80040000: 0x00060000 0x80040010: 0x800004b1 0x80040050: 0x00011001 0x80040080: 0x64000001 0x80040090: 0x00000005 0x800400a0: 0x80000001 0x800400b0: 0x00000002 0x800400c0: 0xa0000001 0x800401b0: 0x5e5b5513 0x800401c0: 0x00929292 0x800401d0: 0x00004104
So the issue with IO1_STABLE seems to come from the bootloader.
Do you have any idea which i.MX28 registers additionally could be relevant?
Stefan
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