From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludovic.desroches@atmel.com (Ludovic Desroches) Date: Tue, 24 Nov 2015 14:47:41 +0100 Subject: [PATCH 2/3] i2c: at91: add DT property "atmel, twd-hold-cycles" to binding In-Reply-To: <1448372862-11912-1-git-send-email-ludovic.desroches@atmel.com> References: <1448372862-11912-1-git-send-email-ludovic.desroches@atmel.com> Message-ID: <1448372862-11912-2-git-send-email-ludovic.desroches@atmel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 at fff84000 { #size-cells = <0>; clocks = <&twi0_clk>; clock-frequency = <400000>; + atmel,twd-hold-cycles = <2>; 24c512 at 50 { compatible = "24c512"; -- 2.5.0