From c439b8f46ee79147139e124621dbc9e1e7804655 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 25 Jul 2011 22:20:33 +0100 Subject: 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 Signed-off-by: Liam Girdwood --- drivers/regulator/wm831x-dcdc.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c index 95249f7a0e39..2c5d54b026c9 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) { -- cgit v1.2.3