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2016-08-25dt-bindings: i2c: add support for 'i2c-arb' subnodePeter Rosin
This gets rid of the need for a pointless 'reg' property for i2c arbitrators. I.e. this new and more compact style some-arbitrator { i2c-arb { #address-cells = <1>; #size-cells = <0>; some-i2c-device@50 { reg = <0x50>; }; }; }; instead of the old some-arbitrator { #address-cells = <1>; #size-cells = <0>; i2c@0 { reg = <0>; #address-cells = <1>; #size-cells = <0>; some-i2c-device@50 { reg = <0x50>; }; }; }; Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Peter Rosin <peda@axentia.se>
2016-06-09i2c: mux: refer to i2c-mux.txtSimon Horman
Correct references to i2c-mux.txt which was previously mux.txt. Also correct the spelling of relevant. Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-05-22i2c: mux: Add more warnings to i2c-arb-gpio-challenge docsDoug Anderson
This adds some more warnings to the i2c-arb-gpio-challenge docs to help encourage people not to use it in their designs unless they have no choice. Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-04-17i2c: mux: Add i2c-arb-gpio-challenge 'mux' driverDoug Anderson
The i2c-arb-gpio-challenge driver implements an I2C arbitration scheme where masters need to claim the bus with a GPIO before they can start a transaction. This should generally only be used when standard I2C multimaster isn't appropriate for some reason (errata/bugs). This driver is based on code that Simon Glass added to the i2c-s3c2410 driver in the Chrome OS kernel 3.4 tree. The current incarnation as a mux driver is as suggested by Grant Likely. See <https://patchwork.kernel.org/patch/1877311/> for some history. Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>