mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 05:02:12 +00:00
7952b4baff
The rt5514 can get confused and incorrectly detect a start bit if the SCL/SDA lines happen to both go low and then high again. This situation has been seen to happen at reboot time and is also theoretically possible during suspend/resume if the rt5514 keeps power but we shut down the i2c connection. When this happens the rt5514 is confused about the state of the i2c bus and won't recognize its own address. That will lead to the rt5514 incorrectly NAKing the first transfer. A single i2c transfer to any address should be enough to get the rt5514 out of this funky state. It is currently believed that this problem should be fixed in the rt5514 driver itself because it seems that the i2c controller in the rt5514 is easily confused. Most i2c devices wouldn't detect a start bit in this case. Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Mark Brown <broonie@kernel.org> |
||
|---|---|---|
| .. | ||
| aoa | ||
| arm | ||
| atmel | ||
| core | ||
| drivers | ||
| firewire | ||
| hda | ||
| i2c | ||
| isa | ||
| mips | ||
| oss | ||
| parisc | ||
| pci | ||
| pcmcia | ||
| ppc | ||
| sh | ||
| soc | ||
| sparc | ||
| spi | ||
| synth | ||
| usb | ||
| ac97_bus.c | ||
| Kconfig | ||
| last.c | ||
| Makefile | ||
| sound_core.c | ||