Hi Fabio,

Stefan Wahren [off-list ref] hat am 11. Februar 2015 um 21:31
geschrieben:


Hi Fabio,

quoted

Fabio Estevam [off-list ref] hat am 11. Februar 2015 um 17:58
geschrieben:


Hi Stefan,

On Tue, Feb 10, 2015 at 7:24 PM, Stefan Wahren [off-list ref]
wrote:

quoted

Hi Fabio,

quoted

Fabio Estevam [off-list ref] hat am 10. Februar 2015 um 16:06
geschrieben:


Hi Stefan,

On Tue, Feb 10, 2015 at 11:55 AM, Stefan Wahren [off-list ref]
wrote:

quoted

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