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Date: Mon, 10 Nov 2014 15:12:14 +0200 From: Mikko Perttunen <mikko.perttunen@...si.fi> To: swarren@...dotorg.org, thierry.reding@...il.com, gnurou@...il.com Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org, wni@...dia.com, Mikko Perttunen <mperttunen@...dia.com> Subject: [PATCH v4 REPOST 2/5] of: Add nvidia,controller-id property to Tegra I2C bindings From: Mikko Perttunen <mperttunen@...dia.com> Sometimes, hardware blocks want to issue requests to devices connected to I2C buses by itself. In such case, the bus the target device resides on must be configured into a register. For this purpose, each I2C controller has a defined ID known by the hardware. Add a property for these IDs to the device tree bindings, so that drivers can know what ID to write to a hardware register when configuring a block that sends I2C messages autonomously. Signed-off-by: Mikko Perttunen <mperttunen@...dia.com> Reviewed-by: Wei Ni <wni@...dia.com> Tested-by: Wei Ni <wni@...dia.com> --- Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt index 87507e9..e9e5994 100644 --- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt +++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt @@ -57,6 +57,10 @@ Required properties: - rx - tx +Optional properties: +- nvidia,controller-id: ID of controller when referred to in + hardware registers. + Example: i2c@...0c000 { @@ -71,5 +75,6 @@ Example: reset-names = "i2c"; dmas = <&apbdma 16>, <&apbdma 16>; dma-names = "rx", "tx"; + nvidia,controller-id = <0>; status = "disabled"; }; -- 2.1.3 -- 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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