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V4L/DVB (3403): Add probe check for the tda9840. 

- Add probe check for the tda9840 to prevent misdetection of a Micronas
  dpl3518a as a tda9840.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil 2006-01-23 09:47:40 -02:00 committed by Mauro Carvalho Chehab
parent 9a61003397
commit 2ecdd76e9b
1 changed files with 9 additions and 0 deletions
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drivers/media/video/tvaudio.c
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@ -390,6 +390,14 @@ static void tda9840_setmode(struct CHIPSTATE *chip, int mode)
chip_write(chip, TDA9840_SW, t);
}
static int tda9840_checkit(struct CHIPSTATE *chip)
{
int rc;
rc = chip_read(chip);
/* lower 5 bits should be 0 */
return ((rc & 0x1f) == 0) ? 1 : 0;
}
/* ---------------------------------------------------------------------- */
/* audio chip descriptions - defines+functions for tda985x */
@ -1264,6 +1272,7 @@ static struct CHIPDESC chiplist[] = {
.addr_hi = I2C_TDA9840 >> 1,
.registers = 5,
.checkit = tda9840_checkit,
.getmode = tda9840_getmode,
.setmode = tda9840_setmode,
.checkmode = generic_checkmode,