diff options
| author | Devin Heitmueller <dheitmueller@linuxtv.org> | 2008-12-29 22:27:30 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-30 09:40:35 -0200 |
| commit | ed14e1c2f419a380c7a1a3483ac2443d20a24355 (patch) | |
| tree | 293192d47aa8d96ee69e5c8c77399443ecf967fc /drivers | |
| parent | 60b4bde48b36c0315ef41fd38c339b9c7e68c46f (diff) | |
| download | linux-ed14e1c2f419a380c7a1a3483ac2443d20a24355.tar.bz2 | |
V4L/DVB (10119): em28xx: fix corrupted XCLK value
Correct problem introduced during the board refactoring where the XCLK
frequency would get zero'd out. The sequence of events was as follows:
em28xx_pre_card_setup() called em28xx_set_model()
em28xx_set_model() would memcpy to dev->board configuration
em28xx_pre_card_setup() would set the dev->board.xclk if not set
em28xx_pre_card_setup() would set the XCLK register based on dev->board.xclk
...
em28xx_card_setup() would call em28xx_set_model()
em28xx_set_model() would memcpy to dev->board configuration (clearing out
value of dev->board.xclk set in em28xx_pre_card_setup)
...
em28xx_audio_analog_set() sets the XCLK register based on dev->board.xclk
(which now contains zero)
The change sets the default XCLK and I2C Clock fields in the board definition
inside of em28xx_set_model() so that subsequent calls do not cause the
values to be overwritten.
Signed-off-by: Devin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-cards.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c index 11ce63578e9b..c427c0eeba1d 100644 --- a/drivers/media/video/em28xx/em28xx-cards.c +++ b/drivers/media/video/em28xx/em28xx-cards.c @@ -1403,6 +1403,17 @@ EXPORT_SYMBOL_GPL(em28xx_tuner_callback); static void inline em28xx_set_model(struct em28xx *dev) { memcpy(&dev->board, &em28xx_boards[dev->model], sizeof(dev->board)); + + /* Those are the default values for the majority of boards + Use those values if not specified otherwise at boards entry + */ + if (!dev->board.xclk) + dev->board.xclk = EM28XX_XCLK_IR_RC5_MODE | + EM28XX_XCLK_FREQUENCY_12MHZ; + + if (!dev->board.i2c_speed) + dev->board.i2c_speed = EM28XX_I2C_CLK_WAIT_ENABLE | + EM28XX_I2C_FREQ_100_KHZ; } /* Since em28xx_pre_card_setup() requires a proper dev->model, @@ -1464,17 +1475,8 @@ void em28xx_pre_card_setup(struct em28xx *dev) if (rc >= 0) dev->reg_gpo = rc; - /* Those are the default values for the majority of boards - Use those values if not specified otherwise at boards entry - */ - if (!dev->board.xclk) - dev->board.xclk = EM28XX_XCLK_IR_RC5_MODE | - EM28XX_XCLK_FREQUENCY_12MHZ; - - if (!dev->board.i2c_speed) - dev->board.i2c_speed = EM28XX_I2C_CLK_WAIT_ENABLE | - EM28XX_I2C_FREQ_100_KHZ; - + /* Set the initial XCLK and I2C clock values based on the board + definition */ em28xx_write_reg(dev, EM28XX_R0F_XCLK, dev->board.xclk & 0x7f); em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, dev->board.i2c_speed); msleep(50); |