[media] gspca - sonixj: Simplify and clarify the hv7131r probe function

Signed-off-by: Jean-François Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c
index e23de57..901ca81 100644 (file)
--- a/drivers/media/video/gspca/sonixj.c
+++ b/drivers/media/video/gspca/sonixj.c
@@ -1598,22 +1598,22 @@ static void i2c_w_seq(struct gspca_dev *gspca_dev,
        }
 }
 
+/* check the ID of the hv7131 sensor */
+/* this sequence is needed because it activates the sensor */
 static void hv7131r_probe(struct gspca_dev *gspca_dev)
 {
-       i2c_w1(gspca_dev, 0x02, 0);                     /* sensor wakeup */
+       i2c_w1(gspca_dev, 0x02, 0);             /* sensor wakeup */
        msleep(10);
-       reg_w1(gspca_dev, 0x02, 0x66);                  /* Gpio on */
+       reg_w1(gspca_dev, 0x02, 0x66);          /* Gpio on */
        msleep(10);
-       i2c_r(gspca_dev, 0, 5);                         /* read sensor id */
-       if (gspca_dev->usb_buf[0] == 0x02
+       i2c_r(gspca_dev, 0, 5);                 /* read sensor id */
+       if (gspca_dev->usb_buf[0] == 0x02       /* chip ID (02 is R) */
            && gspca_dev->usb_buf[1] == 0x09
-           && gspca_dev->usb_buf[2] == 0x01
-           && gspca_dev->usb_buf[3] == 0x00
-           && gspca_dev->usb_buf[4] == 0x00) {
-               PDEBUG(D_PROBE, "Sensor sn9c102P HV7131R found");
+           && gspca_dev->usb_buf[2] == 0x01) {
+               PDEBUG(D_PROBE, "Sensor HV7131R found");
                return;
        }
-       PDEBUG(D_PROBE, "Sensor 0x%02x 0x%02x 0x%02x - sn9c102P not found",
+       warn("Erroneous HV7131R ID 0x%02x 0x%02x 0x%02x",
                gspca_dev->usb_buf[0], gspca_dev->usb_buf[1],
                gspca_dev->usb_buf[2]);
 }