From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexandre Belloni Subject: [PATCH v5 4/7] dt-bindings: i2c: designware: document MSCC Ocelot bindings Date: Fri, 31 Aug 2018 17:11:11 +0200 Message-ID: <20180831151114.25739-5-alexandre.belloni@bootlin.com> References: <20180831151114.25739-1-alexandre.belloni@bootlin.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20180831151114.25739-1-alexandre.belloni@bootlin.com> Sender: linux-kernel-owner@vger.kernel.org To: Wolfram Sang , Jarkko Nikula , James Hogan , Paul Burton Cc: Andy Shevchenko , Mika Westerberg , linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org, Thomas Petazzoni , Allan Nielsen , Alexandre Belloni List-Id: devicetree@vger.kernel.org Document bindings for the Microsemi Ocelot integration of the Designware I2C controller. Reviewed-by: Rob Herring Signed-off-by: Alexandre Belloni --- Documentation/devicetree/bindings/i2c/i2c-designware.txt | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt index fbb0a6d8b964..3e4bcc2fb6f7 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt @@ -3,6 +3,7 @@ Required properties : - compatible : should be "snps,designware-i2c" + or "mscc,ocelot-i2c" with "snps,designware-i2c" for fallback - reg : Offset and length of the register set for the device - interrupts : where IRQ is the interrupt number. @@ -11,8 +12,12 @@ Recommended properties : - clock-frequency : desired I2C bus clock frequency in Hz. Optional properties : + - reg : for "mscc,ocelot-i2c", a second register set to configure the SDA hold + time, named ICPU_CFG:TWI_DELAY in the datasheet. + - i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds. - This option is only supported in hardware blocks version 1.11a or newer. + This option is only supported in hardware blocks version 1.11a or newer and + on Microsemi SoCs ("mscc,ocelot-i2c" compatible). - i2c-scl-falling-time-ns : should contain the SCL falling time in nanoseconds. This value which is by default 300ns is used to compute the tLOW period. -- 2.19.0.rc1