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regulator: Bootstrap wm831x DVS VSEL value from ON VSEL if not already set 

If we don't have a DVS VSEL value already set when we start up then start
it off with the value currently being used for ON.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Mark Brown 2011-07-25 22:20:33 +01:00 committed by Liam Girdwood
parent b47ba9fdd3
commit c439b8f46e
1 changed files with 14 additions and 0 deletions
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14
drivers/regulator/wm831x-dcdc.c
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@ -491,6 +491,20 @@ static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc,
return;
}
/* If DVS_VSEL is set to the minimum value then raise it to ON_VSEL
* to make bootstrapping a bit smoother.
*/
if (!dcdc->dvs_vsel) {
ret = wm831x_set_bits(wm831x,
dcdc->base + WM831X_DCDC_DVS_CONTROL,
WM831X_DC1_DVS_VSEL_MASK, dcdc->on_vsel);
if (ret == 0)
dcdc->dvs_vsel = dcdc->on_vsel;
else
dev_warn(wm831x->dev, "Failed to set DVS_VSEL: %d\n",
ret);
}
ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL,
WM831X_DC1_DVS_SRC_MASK, ctrl);
if (ret < 0) {