Commits
Stefan Roese committed d04913ec5f8
i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driver This patch adds a driver for the I2C controller found on the MediaTek MT7621/7628/7688 SoC's. The base version of this driver was done by Steven Liu (according to the copyright and MODULE_AUTHOR lines). It can be found in the OpenWRT repositories (v4.14 at the time I looked). The base driver had many issues, which are disccussed here: https://en.forum.labs.mediatek.com/t/openwrt-15-05-loads-non-working-i2c-kernel-module-for-mt7688/1286/3 >From this link an enhanced driver version (complete rewrite, mayor changes: support clock stretching, repeated start, ACK handling and unlimited message length) from Jan Breuer can be found here: https://gist.github.com/j123b567/9b555b635c2b4069d716b24198546954 This patch now adds this enhanced I2C driver to mainline. Changes by Stefan Roese for upstreaming: - Add devicetree bindings - checkpatch clean - Use module_platform_driver() - Minor cosmetic enhancements - Removed IO warpped functions - Use readl_relaxed_poll_timeout() and drop poll_down_timeout() - Removed superfluous barrier() in mtk_i2c_reset() - Use i2c_8bit_addr_from_msg() - Added I2C_FUNC_PROTOCOL_MANGLING - Removed adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD; Signed-off-by: Stefan Roese <sr@denx.de> Tested-by: René van Dorst <opensource@vdorst.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>