From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrey Danin Subject: Re: [RFC 0/9] i2c: slave: improve i2c client address spaces and their DT support Date: Mon, 20 Jul 2015 11:59:00 +0300 Message-ID: <55ACB854.4010208@mail.ru> References: <1437142109-31975-1-git-send-email-wsa@the-dreams.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1437142109-31975-1-git-send-email-wsa@the-dreams.de> Sender: linux-sh-owner@vger.kernel.org To: Wolfram Sang , linux-i2c@vger.kernel.org Cc: linux-sh@vger.kernel.org, Magnus Damm , Simon Horman , Laurent Pinchart , Geert Uytterhoeven , linux-tegra@vger.kernel.org List-Id: linux-i2c@vger.kernel.org On 17.07.2015 17:08, Wolfram Sang wrote: > As promised here is my RFC to improve address spaces for I2C. This should give > i2c seperate address spaces for standard clients, 10 bit clients, and our own > slave clients. So, you can now have a 7 bit slave at 0x50 and a 10 bit slave at > 0x050. Or, you can have a slave driver listening at some address and at the > same time have a client driver talking to this address. Note that this is only > the core support for that separation, I am still not sure if there is hardware > being able talking to its own slave address, but we will see. > > This RFC and while I did some quick tests, it is not thoroughly tested. But I > wanted to push it out before I leave the computer for the weekend. It still > shows what path I chose to solve the problem. So, comments on that and further > testing are more than welcome! > > BTW Andrey, I did not modify your patch and couldn't get the i2c-slave-eeprom driver > to work with my Jetson TK1. Does this work for you? > > Thanks, > > Wolfram > > > Andrey Danin (1): > i2c: tegra: implement slave mode > > Wolfram Sang (8): > dt-bindings: add header for generic I2C flags in bindings > i2c: add a flag to mark clients as slaves > i2c: apply address offset for slaves, too > i2c: rename address check functions > i2c: make address check indpendent from client struct > i2c: apply DT flags when probing > i2c: take address space into account when checking for used addresses > dts: tegra: WIP: hack dts to test new dt flags for i2c > > arch/arm/boot/dts/tegra124-jetson-tk1.dts | 7 ++ > drivers/i2c/busses/Kconfig | 1 + > drivers/i2c/busses/i2c-tegra.c | 119 ++++++++++++++++++++++++++++++ > drivers/i2c/i2c-core.c | 69 +++++++++++------ > include/dt-bindings/i2c/i2c.h | 18 +++++ > include/linux/i2c.h | 9 ++- > 6 files changed, 197 insertions(+), 26 deletions(-) > create mode 100644 include/dt-bindings/i2c/i2c.h > The series is Tested-by: Andrey Danin