Hi Peter,
El Fri, Jan 28, 2011 at 05:24:01PM -0500 Peter Barada ha dit:
> I have a tsc2004 touch controller on I2C3 that is powered by vaux1,
> and since its probed I have to turn the power on before it can be
> probed.
>
> I've created:
>
> static struct regulator_consumer_supply dm3730logic_vaux1_supply = {
> .supply = "vaux1",
> };
>
> /* VAUX1 for touch chip */
> static struct regulator_init_data dm3730logic_vaux1 = {
> .constraints = {
> .min_uV = 3000000,
> .max_uV = 3000000,
> .apply_uV = true,
> .valid_modes_mask = REGULATOR_MODE_NORMAL
> | REGULATOR_MODE_STANDBY,
> .valid_ops_mask = REGULATOR_CHANGE_MODE
> | REGULATOR_CHANGE_STATUS,
> },
> .num_consumer_supplies = 1,
> .consumer_supplies = &dm3730logic_vaux1_supply,
> };
>
> and listed it in the twldata initializer
> .vaux1 = &dm3730logic_vaux1,
>
> But it never gets enabled... How can I tell the kernel to turn the regulator
> on?
>
> If I try to call regulator_get() right before the call to
> omap_register_i2c_bus for I2C3, regulator_get returns a NULL due to
> regulator_map_list being empty. If I look in sys/class/regulator I see VAUX1
> listed (as regulator.4), but there are no users.
>
> Any suggestions on how I can turn on vaux1 so the tsc2004 touch
> controller is visible to by the I2C system?
I guess the problem is that the regulators aren't initialized when you
call regulator_get() before the i2c bus registration
I think the right thing is to do the regulator handling inside the
tsc2004 driver
The ADS7846 touchscreen driver (drivers/input/touchscreen/ads7846.c)
in combination with the TimLL Devkit8000 board
(arch/arm/mach-omap2/board-devkit8000.c) can serve you as a reference
Best regards
--
Matthias Kaehlcke
Embedded Linux Developer
Amsterdam
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one can be at peace unless he has his freedom
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