From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sricharan R Subject: [PATCH V4 0/7] i2c: qup: Add support for v2 tags and bam dma Date: Thu, 9 Jul 2015 08:55:43 +0530 Message-ID: <1436412350-19519-1-git-send-email-sricharan@codeaurora.org> Return-path: Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: iivanov-NEYub+7Iv8PQT0dZR+AlfA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, agross-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Cc: sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org List-Id: devicetree@vger.kernel.org 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. Tested this series on apq8074 dragon board eeprom client on i2c bus1 [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 (7): i2c: qup: Change qup_wait_writeready function to use for all timeouts qup: i2c: factor out common code for reuse 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 | 943 +++++++++++++++++++++++++++++++++--- 2 files changed, 880 insertions(+), 77 deletions(-) -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation