[PATCH] ARM: dts: am335x-bone* enable pmic-shutdown-controller
Tony Lindgren
tony at atomide.com
Mon May 18 09:29:36 PDT 2015
* Robert Nelson <robertcnelson at gmail.com> [150518 09:15]:
> On Mon, May 18, 2015 at 10:21 AM, Tony Lindgren <tony at atomide.com> wrote:
>
> All the rev information is in the board's eeprom:
>
> hexdump -e '8/1 "%c"' /sys/bus/i2c/devices/0-0050/eeprom -s 12 -n 4
>
> Rev A5B
> 0A5B
>
> Rev C
> 000C
>
> Just another default qwerk to add to Pantelis' bone_capemgr. ;)
It seems we should not even instantiate some devices on BBB
until the EEPROM is parsed.. So maybe something like this:
1. The problem devices are initially set with status = "disabled"
in the dts
2. We set up drivers/*/bbb-eeprom.c that parses the board
revision at module_init time, and then flips the selected
devices to have status = "enabled" and populates the revision
info based on the eeprom and SoC revision passed in pdata.
Then those devices get their struct device created and
probed, but at a much later time.
So rather than trying to init all that early, let's just
init them much later when we have the proper I2C driver
running?
Regards,
Tony
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