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V4L/DVB (13654): tw9910: Tri-state pins when idle

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Tri-state all pins when not streaming to save power.

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Kuninori Morimoto 2009-12-11 11:34:50 -03:00 committed by Mauro Carvalho Chehab
parent 88a67c51df
commit 06f292e480
1 changed files with 30 additions and 13 deletions
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43
drivers/media/video/tw9910.c
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@ -152,7 +152,10 @@
/* 1 : non-auto */
#define VSCTL 0x08 /* 1 : Vertical out ctrl by DVALID */
/* 0 : Vertical out ctrl by HACTIVE and DVALID */
#define OEN 0x04 /* Output Enable together with TRI_SEL. */
#define OEN_TRI_SEL_MASK 0x07
#define OEN_TRI_SEL_ALL_ON 0x00 /* Enable output for Rev0/Rev1 */
#define OEN_TRI_SEL_ALL_OFF_r0 0x06 /* All tri-stated for Rev0 */
#define OEN_TRI_SEL_ALL_OFF_r1 0x07 /* All tri-stated for Rev1 */
/* OUTCTR1 */
#define VSP_LO 0x00 /* 0 : VS pin output polarity is active low */
@ -236,7 +239,6 @@ struct tw9910_priv {
static const struct regval_list tw9910_default_regs[] =
{
{ OPFORM, 0x00 },
{ OUTCTR1, VSP_LO | VSSL_VVALID | HSP_HI | HSSL_HSYNC },
ENDMARKER,
};
@ -519,20 +521,35 @@ static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
struct i2c_client *client = sd->priv;
struct tw9910_priv *priv = to_tw9910(client);
if (!enable)
return 0;
u8 val;
if (!priv->scale) {
dev_err(&client->dev, "norm select error\n");
return -EPERM;
if (!enable) {
switch (priv->revision) {
case 0:
val = OEN_TRI_SEL_ALL_OFF_r0;
break;
case 1:
val = OEN_TRI_SEL_ALL_OFF_r1;
break;
default:
dev_err(&client->dev, "un-supported revision\n");
return -EINVAL;
}
} else {
val = OEN_TRI_SEL_ALL_ON;
if (!priv->scale) {
dev_err(&client->dev, "norm select error\n");
return -EPERM;
}
dev_dbg(&client->dev, "%s %dx%d\n",
priv->scale->name,
priv->scale->width,
priv->scale->height);
}
dev_dbg(&client->dev, "%s %dx%d\n",
priv->scale->name,
priv->scale->width,
priv->scale->height);
return 0;
return tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);
}
static int tw9910_set_bus_param(struct soc_camera_device *icd,