[PATCH V3 0/6] i2c: qup: Add support for v2 tags and bam dma

[Sricharan R]

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(-)

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