Hi Fabio, > Fabio Estevam <feste...@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.wah...@i2se.com> wrote: > > Hi Fabio, > > > >> Fabio Estevam <feste...@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.wah...@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 So only IO1_STABLE (0x800401b0) is different. If i restore clk_ref_set_rate() from clk-ref.c after the complete patch is applied, the issue with the IO1_STABLE bit disappears. Can you confirm the behavior according to your flash issue? I think it would be the best to revert my patch. Sorry for the trouble. Stefan > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-ker...@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
