On Fri, May 8, 2015 at 10:35 AM, Nikolay Dimitrov picmaster@mail.bg wrote:
Hi Tim,
On 05/08/2015 06:42 PM, Tim Harvey wrote:
<snip>
Your right - There is no indication in the IMX6SDLRM that OTP indicates either temperature grade 'or' speed grade, however my testing looks like they implement the same OTP settings for this as the IMX6DUAL/IMX6QUAD as indicated in the IMX6DQRM.
I have tested these patches with the following SoC's I have available:
- MCIMX6S7CVM08AC (IMX6S r1.2, Industrial temp, 800MHz) - shows
'industrial (-40C to 105C) 792 MHz' (correct)
- MCIMX6S5EVM10AC (IMX6S r1.2, Extended Commercial temp, 1GHz) - shows
'extended commercial (-20C to 105C) 996 MHz (at 792 MHz)' (correct)
- MCIMX6U7CVM08AB (IMX6DL r1.1, Industrial temp, 800MHz) - shows
'industrial (-40C to 105C) 792 MHz' (correct)
- MCIMX6Q6AVT10AC (IMX6Q r1.2. Automotive temp, 1GHz) - shows
'automotive (-40C to 125C) 996 MHz (at 792 MHz)' (correct)
I'll send our FAE a question to verify - perhaps your FAE simply answered the questions based on the reference manual (which is notoriously lacking info and in some cases wrong).
I encourage anyone with additional parts to test these patches and report if they show accurate information. If anyone has any IMX6SX I would appreciate removing the check that ignores the OTP for that and seeing if the results make sense.
Here are the results from riotboard (imx6s) testing with your patches against Stefano's tree:
Before: CPU: Freescale i.MX6SOLO rev1.1 at 792 MHz
After patch 1: CPU: Freescale i.MX6SOLO rev1.1 996 MHz (at 792 MHz)
After patch 2: CPU: Freescale i.MX6SOLO rev1.1 996 MHz (at 792 MHz)
After patch 3: CPU: Freescale i.MX6SOLO rev1.1 // No idea why I lost the MHz values
Nikolay,
thats an issue in my patch if you don't have CONFIG_IMX6_THERMAL. I'll fix in a followup patch version
After patch 4: CPU: Freescale i.MX6SOLO rev1.1
MHz values are missing after patch 3, and looking diagonally at the code I don't see a reason. Next, riotboard doesn't have CONFIG_IMX6_THERMAL by default. When added, I get this:
$ make u-boot.imx ...
<snip>
Are there additional CONFIG dependencies?
Looks like CONFIG_IMX6_THERMAL also needs CONFIG_DM_THERMAL (includes thermal-uclass from drivers/thermal/Makefile)
Thanks for testing this. If you can get it working please let me know what the actual part markings are on the parts you test with.
Tim
Regards, Nikolay