V4L/DVB (13654): tw9910: Tri-state pins when idle
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>
diff --git a/drivers/media/video/tw9910.c b/drivers/media/video/tw9910.c
index 3d8a45f..80b214e 100644
--- a/drivers/media/video/tw9910.c
+++ b/drivers/media/video/tw9910.c
@@ -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 @@
static const struct regval_list tw9910_default_regs[] =
{
- { OPFORM, 0x00 },
{ OUTCTR1, VSP_LO | VSSL_VVALID | HSP_HI | HSSL_HSYNC },
ENDMARKER,
};
@@ -519,20 +521,35 @@
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,