From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ludovic Desroches Subject: [PATCH 2/3] i2c: at91: add DT property "atmel,twd-hold-cycles" to binding Date: Tue, 24 Nov 2015 14:47:41 +0100 Message-ID: <1448372862-11912-2-git-send-email-ludovic.desroches@atmel.com> References: <1448372862-11912-1-git-send-email-ludovic.desroches@atmel.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from eusmtp01.atmel.com ([212.144.249.242]:58131 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752238AbbKXNsI (ORCPT ); Tue, 24 Nov 2015 08:48:08 -0500 In-Reply-To: <1448372862-11912-1-git-send-email-ludovic.desroches@atmel.com> Sender: linux-i2c-owner@vger.kernel.org List-Id: linux-i2c@vger.kernel.org To: wsa@the-dreams.de, nicolas.ferre@atmel.com, alexandre.belloni@free-electrons.com, plagnioj@jcrosoft.com Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, cyrille.pichen@atmel.com, Wenyou Yang , Ludovic Desroches From: Wenyou Yang Add a DT property "atmel,twd-hold-cycles" to specify the HOLD filed of TWIHS_CWGR register to increase the TWD hold time. Signed-off-by: Wenyou Yang Signed-off-by: Ludovic Desroches --- Documentation/devicetree/bindings/i2c/i2c-at91.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt index 6e81dc1..c81a0cb 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt @@ -17,6 +17,9 @@ Optional properties: - dma-names: should contain "tx" and "rx". - atmel,fifo-size: maximum number of data the RX and TX FIFOs can store for FIFO capable I2C controllers. +- atmel,twd-hold-cycles: number of cycles for TWD hold time whose value is + determinated by (atmel,twd-hold-cycles + 3) x t_peripheral_clock, + maximum value is 0x1f. - Child nodes conforming to i2c bus binding Examples : @@ -29,6 +32,7 @@ i2c0: i2c@fff84000 { #size-cells = <0>; clocks = <&twi0_clk>; clock-frequency = <400000>; + atmel,twd-hold-cycles = <2>; 24c512@50 { compatible = "24c512"; -- 2.5.0