From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Subject: [PATCH 1/3] i2c: document binding for multi-master case Date: Wed, 23 Dec 2015 17:56:32 +0100 Message-ID: <1450889794-9509-2-git-send-email-wsa@the-dreams.de> References: <1450889794-9509-1-git-send-email-wsa@the-dreams.de> Return-path: Received: from sauhun.de ([89.238.76.85]:58280 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751792AbbLWQ5Q (ORCPT ); Wed, 23 Dec 2015 11:57:16 -0500 In-Reply-To: <1450889794-9509-1-git-send-email-wsa@the-dreams.de> Sender: linux-i2c-owner@vger.kernel.org List-Id: linux-i2c@vger.kernel.org To: linux-i2c@vger.kernel.org Cc: Wolfram Sang , linux-sh@vger.kernel.org, Magnus Damm , Yoshihiro Shimoda , Geert Uytterhoeven , Geert Uytterhoeven , Rob Herring From: Wolfram Sang We need this binding because some I2C master drivers will need to adapt their PM settings for the arbitration circuitry. Acked-by: Geert Uytterhoeven Acked-by: Rob Herring Signed-off-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/i2c.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt index a00219f5ee0733..c8d977ed847f3c 100644 --- a/Documentation/devicetree/bindings/i2c/i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c.txt @@ -54,6 +54,11 @@ wants to support one of the below features, it should adapt the bindings below. "irq" and "wakeup" names are recognized by I2C core, other names are left to individual drivers. +- multi-master + states that there is another master active on this bus. The OS can use + this information to adapt power management to keep the arbitration awake + all the time, for example. + - wakeup-source device can be used as a wakeup source. -- 2.1.4