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omap: rx51: Set regulator V28 always on

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It seems that the battery cover sensor in Nokia N900 is powered from the
V28 domain. Now if this regulator is disabled it causes that the gpio 160
reads only zero which effectively causes uSD removal detection.

Currently the bootloader enabled V28 is kept on but this may change in the
future according to comment in
drivers/regulator/core.c: regulator_has_full_constraints.

Also if there are any consumers on the V28 domain doing regulator_enable
regulator_disable cycle the V28 will be disabled after that.

Prepare for these by defining the V28 as always_on regulator.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Cc: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Jarkko Nikula 2010-08-02 13:18:02 +03:00 committed by Tony Lindgren
parent 79ccf549b3
commit 000d534ed7
1 changed files with 1 additions and 0 deletions
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arch/arm/mach-omap2/board-rx51-peripherals.c
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@ -361,6 +361,7 @@ static struct regulator_init_data rx51_vaux1 = {
.name = "V28",
.min_uV = 2800000,
.max_uV = 2800000,
.always_on = true, /* due battery cover sensor */
.valid_modes_mask = REGULATOR_MODE_NORMAL
| REGULATOR_MODE_STANDBY,
.valid_ops_mask = REGULATOR_CHANGE_MODE