lkml.org 
[lkml]   [2016]   [Jan]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH V7 0/6] i2c: qup: Add support for v2 tags and bam dma
Date
i2c: qup: Add support for v2 tags and bam dma

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 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.

Tested this series on apq8074 dragon board eeprom client on i2c bus1

[V7] Added tested-by tags and fixed a small comment

[V6] Added review tags and fixed a checkpatch warning in patch 4/6.

[V5] Addressed few more comments from Ivan T. Ivanov.
Squashed patch 2 and 3 as no point in having only few lines of
common code between v1 and v2 tags for increased complexity.
Couple of non functional review comments fixes in patch 3, 4.
Added a change in patch 4 to have proper transfer completion in
a corner case. patch 5, 6 unchanged.

[V4] Added a patch to factor out some common code.
Removed support for freq > 400KHZ as per comments.
Addressed comments from Ivan T. Ivanov to keep the code for
V2 support in a separate path.
Changed the authorship of V2 tags support patch.

[V3] Added support to coalesce each i2c_msg in i2c_msgs for fifo and
block mode in Patch 2. Also addressed further code comments.

http://comments.gmane.org/gmane.linux.drivers.i2c/22497

[V2] Addressed comments from Ivan T. Ivanov, Andy Gross [v1] Initial Version

Sricharan R (6):
i2c: qup: Change qup_wait_writeready function to use for all timeouts
i2c: qup: Add V2 tags support
i2c: qup: Transfer each i2c_msg in i2c_msgs without a stop bit
i2c: qup: Add bam dma capabilities
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 | 922 ++++++++++++++++++++++++++++++++++--
2 files changed, 887 insertions(+), 49 deletions(-)

--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation


\
 
 \ /
  Last update: 2016-01-19 11:21    [W:0.196 / U:0.192 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site