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| author | Andy Walls <awalls@radix.net> | 2008-06-22 01:27:00 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-06-26 15:58:54 -0300 |
| commit | 1f09e8a25c9aaa4066b4593c1bf99a4cbcc38120 (patch) | |
| tree | 4b204cb090b2b1be58d0aebc53291afd62e12321 /drivers/media/video/cx18/cx18-cards.h | |
| parent | 08cf7b2ed172cc83f3d2f44b712b3d54e6cc4ae6 (diff) | |
| download | op-kernel-dev-1f09e8a25c9aaa4066b4593c1bf99a4cbcc38120.zip op-kernel-dev-1f09e8a25c9aaa4066b4593c1bf99a4cbcc38120.tar.gz | |
V4L/DVB (8068): cx18: Add I2C slave reset via GPIO upon initialization
cx18: Add I2C slave reset via GPIO upon initialization. One user,
Michael <msd4824@yahoo.com>, has reported this allows his HVR-1600 EEPROM to
be consistently recognized when using (long,) 100 msec delays. The delays in
this commit are nominal (10 & 40 msec) and need testing/tuning on boards with
I2C problems to find the right values.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/cx18/cx18-cards.h')
| -rw-r--r-- | drivers/media/video/cx18/cx18-cards.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/media/video/cx18/cx18-cards.h b/drivers/media/video/cx18/cx18-cards.h index 3c2c0b9..dc2dd94 100644 --- a/drivers/media/video/cx18/cx18-cards.h +++ b/drivers/media/video/cx18/cx18-cards.h @@ -78,6 +78,13 @@ struct cx18_gpio_init { /* set initial GPIO DIR and OUT values */ u32 initial_value; }; +struct cx18_gpio_i2c_slave_reset { + u32 active_lo_mask; /* GPIO outputs that reset i2c chips when low */ + u32 active_hi_mask; /* GPIO outputs that reset i2c chips when high */ + int msecs_asserted; /* time period reset must remain asserted */ + int msecs_recovery; /* time after deassert for chips to be ready */ +}; + struct cx18_card_tuner { v4l2_std_id std; /* standard for which the tuner is suitable */ int tuner; /* tuner ID (from tuner.h) */ @@ -114,7 +121,8 @@ struct cx18_card { /* GPIO card-specific settings */ u8 xceive_pin; /* XCeive tuner GPIO reset pin */ - struct cx18_gpio_init gpio_init; + struct cx18_gpio_init gpio_init; + struct cx18_gpio_i2c_slave_reset gpio_i2c_slave_reset; struct cx18_card_tuner tuners[CX18_CARD_MAX_TUNERS]; struct cx18_card_tuner_i2c *i2c; |
