Re: [PATCH 5/5 v3] ARM: at91: sam9x5 add i2c DT support
From: Rob Herring <hidden>
Date: 2012-03-08 17:12:29
Also in:
linux-arm-kernel
On 03/08/2012 02:50 AM, Jean-Christophe PLAGNIOL-VILLARD wrote:
quoted hunk
For now on use i2c-gpio driver on the same pin as the hardware IP. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj-sclMFOaUSTBWk0Htik3J/w@public.gmane.org> Cc: Nicolas Ferre <redacted> Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org --- v3: update i2c binding (Rob comments) Best Regards, J. arch/arm/boot/dts/at91sam9x5.dtsi | 39 +++++++++++++++++++++++++++++++++++++ 1 files changed, 39 insertions(+), 0 deletions(-)diff --git a/arch/arm/boot/dts/at91sam9x5.dtsi b/arch/arm/boot/dts/at91sam9x5.dtsi index c294657..fdd1ac6 100644 --- a/arch/arm/boot/dts/at91sam9x5.dtsi +++ b/arch/arm/boot/dts/at91sam9x5.dtsi@@ -188,4 +188,43 @@ status = "disabled"; }; }; + + i2c-gpio@0 { + compatible = "i2c-gpio"; + gpios = <&pioA 30 0 /* sda */ + &pioA 31 0 /* scl */ + >; + i2c-gpio,sda-open-drain; + i2c-gpio,scl-open-drain; + i2c-gpio,delay-us = <2>; /* ~100 kHz */ + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + }; + + i2c-gpio@1 { + compatible = "i2c-gpio"; + gpios = <&pioC 0 0 /* sda */ + &pioC 1 0 /* scl */ + >; + i2c-gpio,sda-open-drain; + i2c-gpio,scl-open-drain; + i2c-gpio,delay-us = <2>; /* ~100 kHz */ + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + }; + + i2c-gpio@2 { + compatible = "i2c-gpio"; + gpios = <&pioB 4 0 /* sda */ + &pioB 5 0 /* scl */ + >; + i2c-gpio,sda-open-drain; + i2c-gpio,scl-open-drain; + i2c-gpio,delay-us = <2>; /* ~100 kHz */ + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + };
If these are just any random gpio lines, it seems strange to define these in a SOC dtsi and then disable them. Rob
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