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[media] em28xx: Do not modify EM28XX_R06_I2C_CLK for em2800

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writing the EM28XX_R06_I2C_CLK register leads to the problem that the
i2c bus on the Terratec Cinergy 200 USB is no longer usable when the
system is rebooted.

The device needs to be unplugged in order to bring it back to life.
Attached patch conditionally disables the write in
em28xx_pre_card_setup() like it is already done in em28xx_card_setup().

Signed-off-by: Sascha Sommer <saschasommer@freenet.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sascha Sommer 2012-01-08 16:32:09 -03:00 committed by Mauro Carvalho Chehab
parent 0903bb540e
commit ca80cf6048
1 changed files with 2 additions and 1 deletions
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3
drivers/media/video/em28xx/em28xx-cards.c
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@ -2287,7 +2287,8 @@ void em28xx_pre_card_setup(struct em28xx *dev)
/* 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);
if (!dev->board.is_em2800)
em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, dev->board.i2c_speed);
msleep(50);
/* request some modules */