Hello Wolfram, I'm reposting this patch set with the linux-ppc list in cc as the ibm I2c controller is primarily (only?) available on ppc platforms. This patch set aims to improve the performance of the driver for the IBM iic controller by implementing the data transfer in the interrupt handler. Using interrupts to trigger the data transfer reduces and make more deterministic the latencies between indivdual bytes, and consequently reduces the total transfer time, In our test environement with multiple masters, this significantly reduces the rate of i2c errors. Changes since v2: - cosmectics change (comments style, removed a hard-coded value) - moved some parts from one patch to another Changes since v1: - split the patch in 4 individual patches. The code has been refactored a bit to make the diff easier to read. - changed some dev_dbg in dev_err or dev_warn when more appropriate jean-jacques hiblot (4): i2c: i2c-ibm-iic: cleanup. i2c: i2c-ibm-iic: perform the transfer in the interrupt handler i2c: i2c-ibm-iic: Implements transfer abortion i2c: i2c-ibm-iic: Implements a polling mode drivers/i2c/busses/i2c-ibm_iic.c | 490 +++++++++++++++++++++++---------------- drivers/i2c/busses/i2c-ibm_iic.h | 20 +- 2 files changed, 309 insertions(+), 201 deletions(-) -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
