QUP from version 2.1.1 onwards, supports a new format of i2c command tags. Tag codes instructs the controller to perform a operation like read/write. This new tagging version supports and is required for adding bam dma capabilities. v2 tags supports transfer of more than 256 bytes in a single i2c transaction. Also adding bam dma support facilitates transferring each i2c_msg in i2c_msgs without a 'stop' bit in between which is required for some of the clients. This series depends on the below bam dma bug fix https://lkml.org/lkml/2015/2/20/47 Tested this series on apq8074 dragon board eeprom client on i2c bus1 [V3] Added support to coalesce each i2c_msg in i2c_msgs for fifo and block mode in Patch 2. Also addressed further code comments. [V2] Addressed comments from Ivan T. Ivanov, Andy Gross [v1] Initial Version Andy Gross (1): i2c: qup: Add V2 tags support Sricharan R (5): i2c: qup: Change qup_wait_writeready function to use for all timeouts i2c: qup: Add bam dma capabilities i2c: qup: Transfer every i2c_msg in i2c_msgs without stop dts: msm8974: Add blsp2_bam dma node dts: msm8974: Add dma channels for blsp2_i2c1 node arch/arm/boot/dts/qcom-msm8974.dtsi | 14 +- drivers/i2c/busses/i2c-qup.c | 877 +++++++++++++++++++++++++++++++++--- 2 files changed, 822 insertions(+), 69 deletions(-) -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
