| commit | d307c28ca9dba7a0677035c9244198b05164c873 | |
| author | Corey Minyard <cminyard@mvista.com> | |
| Mon, 9 Jan 2017 11:40:20 +0000 (9 11:40 +0000) | ||
| committer | Peter Maydell <peter.maydell@linaro.org> | |
| Mon, 9 Jan 2017 11:40:20 +0000 (9 11:40 +0000) | ||
| tree | ee942307fac668f7a2d531bf6b86e6db025cdfd0 | treesnapshot (tar.gz zip) |
| parent | ffe22bf51065dd33022cf91f77a821d1f11c250d | commitdiff |
i2c: Allow I2C devices to NAK start events
Add a return value to the event handler. Some I2C devices will
NAK if they have no data, so allow them to do this. This required
the following changes:
Go through all the event handlers and change them to return int
and return 0.
Modify i2c_start_transfer to terminate the transaction on a NAK.
Modify smbus handing to not assert if a NAK occurs on a second
operation, and terminate the transaction and return -1 instead.
Add some information on semantics to I2CSlaveClass.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add a return value to the event handler. Some I2C devices will
NAK if they have no data, so allow them to do this. This required
the following changes:
Go through all the event handlers and change them to return int
and return 0.
Modify i2c_start_transfer to terminate the transaction on a NAK.
Modify smbus handing to not assert if a NAK occurs on a second
operation, and terminate the transaction and return -1 instead.
Add some information on semantics to I2CSlaveClass.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
14 files changed: