[PATCH 01/17] Documentation: i2c: describe devicetree method for instantiating devices
linux at roeck-us.net
linux at roeck-us.net
Mon Feb 10 13:21:19 EST 2014
Quoting Wolfram Sang <wsa at the-dreams.de>:
> Signed-off-by: Wolfram Sang <wsa at the-dreams.de>
> Cc: devicetree at vger.kernel.org
> Cc: linux-arm-kernel at lists.infradead.org
> ---
>
> Documentation/i2c/instantiating-devices | 34
> +++++++++++++++++++++++++++++++--
> 1 file changed, 32 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/i2c/instantiating-devices
> b/Documentation/i2c/instantiating-devices
> index c70e7a7..6df095a 100644
> --- a/Documentation/i2c/instantiating-devices
> +++ b/Documentation/i2c/instantiating-devices
> @@ -8,8 +8,8 @@ reason, the kernel code must instantiate I2C devices
> explicitly. There are
> several ways to achieve this, depending on the context and requirements.
>
>
> -Method 1: Declare the I2C devices by bus number
> ------------------------------------------------
> +Method 1a: Declare the I2C devices by bus number
> +------------------------------------------------
>
> This method is appropriate when the I2C bus is a system bus as is the case
> for many embedded systems. On such systems, each I2C bus has a number
> @@ -51,6 +51,36 @@ The devices will be automatically unbound and
> destroyed when the I2C bus
> they sit on goes away (if ever.)
>
>
> +Method 1b: Declare the I2C devices via devicetree
> +-------------------------------------------------
> +
Hi Wolfram,
There is now also a means to instantiate I2C devices through
ACPI. This is documented in Documentation/acpi/enumeration.txt.
Might be worthwhile to reference it from instantiating-devices.
I guess that would be a separate patch though.
Thanks,
Guenter
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