On Fri, Feb 12, 2016 at 01:10:43PM -0800, Ray Jui wrote: > From: Ray Jui <rjui@xxxxxxxxxxxx> > > The current iProc I2C driver only allows each TX transfer up to 63 > bytes (the TX FIFO has a size of 64 bytes, and one byte is reserved > for slave address). This patch enhances the driver to support TX > transfer in each I2C message for up to 65535 bytes (a practical > maximum, since member 'max_write_len' of 'struct i2c_adapter_quirks is > of type 'u16') > > This works by loading up the I2C TX FIFO and enabling the TX underrun > interrupt for each burst. After each burst of TX data is finished, > i.e., when the TX FIFO becomes empty, the TX underrun interrupt will be > triggered and another burst of TX data can be loaded into the TX FIFO. > This repeats until all TX data are finished > > Signed-off-by: Ray Jui <rjui@xxxxxxxxxxxx> > Tested-by: Icarus Chau <ichau@xxxxxxxxxxxx> > Reviewed-by: Scott Branden <sbranden@xxxxxxxxxxxx> Applied to for-next, thanks!
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