diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-07-25 22:20:33 +0100 |
|---|---|---|
| committer | Liam Girdwood <lrg@slimlogic.co.uk> | 2011-07-28 10:20:49 +0100 |
| commit | c439b8f46ee79147139e124621dbc9e1e7804655 (patch) | |
| tree | 0c04c3d22396ad477b44ce88cb7a0f74304cb9b6 /drivers/regulator/wm831x-dcdc.c | |
| parent | b47ba9fdd336b318a6a6431e6a4556df99272277 (diff) | |
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>
Diffstat (limited to 'drivers/regulator/wm831x-dcdc.c')
| -rw-r--r-- | drivers/regulator/wm831x-dcdc.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c index 95249f7a0e3..2c5d54b026c 100644 --- a/drivers/regulator/wm831x-dcdc.c +++ b/drivers/regulator/wm831x-dcdc.c @@ -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) { |