[U-Boot] [PATCH RFC] arm: mx6: Add CCGR0 configuration to default DCD (spl_sd.cfg)

[Fabio Estevam]

Hi Stefan,

On Mon, Dec 8, 2014 at 2:27 PM, Stefan Roese <sr at denx.de> wrote:

> Yes, its applied. I'm nearly on mainline right now. And it doesn't help.
> Which makes sense if my current guess is correct, that the BootROM doesn't
> load the SPL completely without this CCGR0 register setting in the DCD.

On a mx6qsabresd booting via SPL:

U-Boot SPL 2015.01-rc3-00158-ge3bf81b (Dec 18 2014 - 11:19:37)


U-Boot 2015.01-rc3-00158-ge3bf81b (Dec 18 2014 - 11:19:37)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
CPU:   Temperature 46 C
Reset cause: POR
Board: MX6-SabreSD
I2C:   ready
DRAM:  1 GiB
PMIC:  PFUZE100 ID=0x10
MMC:   FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
*** Warning - bad CRC, using default environment

No panel detected: default to Hannstar-XGA
Display: Hannstar-XGA (1024x768)
In:    serial
Out:   serial
Err:   serial
Net:   FEC [PRIME]
Hit any key to stop autoboot:  0
=> bmode sd3
resetting ...

U-Boot SPL 2015.01-rc3-00158-ge3bf81b (Dec 18 2014 - 11:19:37)


U-Boot 2015.01-rc3-00158-ge3bf81b (Dec 18 2014 - 11:19:37)

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
CPU:   Temperature 47 C
Reset cause: WDOG
Board: MX6-SabreSD
I2C:   ready
DRAM:  1 GiB
PMIC:  PFUZE100 ID=0x10
MMC:   FSL_SDHC: 0, FSL_SDHC: 1, FSL_SDHC: 2
*** Warning - bad CRC, using default environment

No panel detected: default to Hannstar-XGA
Display: Hannstar-XGA (1024x768)
In:    serial
Out:   serial
Err:   serial
Net:   FEC [PRIME]
Hit any key to stop autoboot:  0
=>

However if I move the SD card into SD2 slot, then it fails:

=> bmode sd2
resetting ...

U-Boot SPL 2015.01-rc3-00158-ge3bf81b (Dec 18 2014 - 11:19:37)
MMC: no card present
spl: mmc init failed: err - -16
### ERROR ### Please RESET the board ###

The spl loaded, but it failed to load U-boot. Probably because SPL did
not initialized SD2, so it seems things are working fine here.