Hi, On Fri, Feb 22, 2013 at 3:48 PM, Tushar Behera <[email protected]> wrote: > LDO3 and LDO8 are used for powering both device and host phy controllers. > These regulators are not handled in USB host driver. Hence we get > unexpected behaviour when the regulators are disabled elsewhere. > > It would be best to keep these regulators always on. No, it's just workaround patch.
It should be handled at USB drivers. we usually used this scheme enable USB power always. but it consumes lots of power. There's no need to enable usb power when there's no usb connection. So I suggest to enable power when usb is connected only. In our case, micro IC detects the usb connection and enable usb power at that time. Thank you, Kyungmin Park > > Signed-off-by: Tushar Behera <[email protected]> > --- > > Based on v3.8. > > arch/arm/mach-exynos/mach-origen.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mach-exynos/mach-origen.c > b/arch/arm/mach-exynos/mach-origen.c > index 5e34b9c..7351063 100644 > --- a/arch/arm/mach-exynos/mach-origen.c > +++ b/arch/arm/mach-exynos/mach-origen.c > @@ -169,6 +169,7 @@ static struct regulator_init_data __initdata > max8997_ldo3_data = { > .min_uV = 1100000, > .max_uV = 1100000, > .apply_uV = 1, > + .always_on = 1, > .valid_ops_mask = REGULATOR_CHANGE_STATUS, > .state_mem = { > .disabled = 1, > @@ -227,6 +228,7 @@ static struct regulator_init_data __initdata > max8997_ldo8_data = { > .min_uV = 3300000, > .max_uV = 3300000, > .apply_uV = 1, > + .always_on = 1, > .valid_ops_mask = REGULATOR_CHANGE_STATUS, > .state_mem = { > .disabled = 1, > -- > 1.7.4.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
