On 5/31/2012 2:49 PM, Eduardo Valentin wrote:
Hello,
On Thu, May 31, 2012 at 04:06:00PM +0400, Konstantin Baydarov wrote:
Hi.
On 05/30/2012 01:26 PM, Cousson, Benoit wrote:
On 5/30/2012 11:05 AM, Konstantin Baydarov wrote:
On 05/30/2012 12:38 PM, Cousson, Benoit wrote:
On 5/29/2012 11:49 AM, Konstantin Baydarov wrote:
Hi, Eduardo.
On 05/25/2012 12:26 PM, Eduardo Valentin wrote:
This patch add device tree entries on OMAP4 based boards for
System Control Module (SCM).
...
I believe that CPU-specific bandgap definition should be moved to
bard specific dts.
Mmm, why, since it is CPU specific and not board specific. I has to
be in the SoC file.
Speaking about omap4430 - omap4430 bandgap differs from omap4460, so
if omap4430 bandgap support will be added to omap-bandgap driver the
version of bandgap should specified in dts file. omap4.dtsi is a
common for omap4 boards, that is why I'm suggesting to move bandgap
description to probably board specific file.
OK, I got your point, but in that case we could potentially define a omap4460.dtsi file.
Another solution is to
determine bandgap type in driver probe function, but in that case
"ti,omap4460-bandgap" in omap4.dtsi should be replaced to
"ti,omap4-bandgap".
Yes, this is the best solution, but that assume that we can identify the control module version from the HW, which is not necessarily true :-(
The IP_REVISION (offset = 0) value are unfortunately not documented, so we should read it to check if they are different from omap4430 and 4460.
The bitfield layout in that register is:
IP_REV_MAJOR: 8..10
IP_REV_CUSTOM: 6..7
IP_REV_MINOR: 0..5
The value of CONTROL_GEN_CORE_REVISION register on my panda board(4430) is:
CONTROL_GEN_CORE_REVISION: 0x40000900
CONTROL_GEN_CORE_HWINFO: 0x0
Eduardo, could you check CONTROL_GEN_CORE_REVISION on your 4460 board.
4460:
[root@(none) ~]# omapconf read 0x4A002000
40000A00
[root@(none) ~]# omapconf read 0x4A002004
00000000
4470:
[root@(none) ~]# omapconf read 0x4A002000
40000B00
[root@(none) ~]# omapconf read 0x4A002004
00000000
Nice! We do have a cool progression 1 -> 2 -> 3 for each revision.
Well at least for the SCM.
Benoit
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