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Date: Tue, 19 Aug 2014 13:34:35 -0500 From: <atull@...nsource.altera.com> To: <wsa@...-dreams.de>, <baruch@...s.co.il>, <mika.westerberg@...ux.intel.com> CC: <grant.likely@...aro.org>, <robh+dt@...nel.org>, <skuribay@...ox.com>, <Romain.Baeriswyl@...lis.com>, <rafael.j.wysocki@...el.com>, <alan@...ux.intel.com>, <linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>, <delicious.quinoa@...il.com>, <dinguyen@...nsource.altera.com>, <yvanderv@...nsource.altera.com>, Alan Tull <atull@...nsource.altera.com> Subject: [PATCH 1/2] i2c: designware: device tree bindings for i2c speed mode From: Alan Tull <atull@...nsource.altera.com> Add "speed-mode" Device Tree property to select between standard and fast i2c mode. Previously, driver was hardwired as fast mode. Default to fast mode if property is not present. Signed-off-by: Alan Tull <atull@...nsource.altera.com> --- .../devicetree/bindings/i2c/i2c-designware.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt index 5199b0c..0e4cd21 100644 --- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt +++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt @@ -9,6 +9,8 @@ Required properties : Recommended properties : - clock-frequency : desired I2C bus clock frequency in Hz. + - speed-mode : 0 = standard (0 - 100Kb/s) + : 1 = fast (<= 400Kb/s) <== default Optional properties : - i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds. @@ -29,6 +31,7 @@ Example : reg = <0xf0000 0x1000>; interrupts = <11>; clock-frequency = <400000>; + speed-mode = <0>; }; i2c@...0000 { -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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