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SubjectRe: [PATCH v11 1/3] mfd: add support for Diolan DLN-2 devices
On Thu, 06 Nov 2014, Octavian Purdila wrote:

> This patch implements the USB part of the Diolan USB-I2C/SPI/GPIO
> Master Adapter DLN-2. Details about the device can be found here:
>
> https://www.diolan.com/i2c/i2c_interface.html.
>
> Information about the USB protocol can be found in the Programmer's
> Reference Manual [1], see section 1.7.
>
> Because the hardware has a single transmit endpoint and a single
> receive endpoint the communication between the various DLN2 drivers
> and the hardware will be muxed/demuxed by this driver.
>
> Each DLN2 module will be identified by the handle field within the DLN2
> message header. If a DLN2 module issues multiple commands in parallel
> they will be identified by the echo counter field in the message header.
>
> The DLN2 modules can use the dln2_transfer() function to issue a
> command and wait for its response. They can also register a callback
> that is going to be called when a specific event id is generated by
> the device (e.g. GPIO interrupts). The device uses handle 0 for
> sending events.
>
> [1] https://www.diolan.com/downloads/dln-api-manual.pdf
>
> Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
> Reviewed-by: Johan Hovold <johan@kernel.org>

Great! Thanks Johan.

> ---
> drivers/mfd/Kconfig | 11 +
> drivers/mfd/Makefile | 1 +
> drivers/mfd/dln2.c | 763 +++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/mfd/dln2.h | 103 +++++++
> 4 files changed, 878 insertions(+)
> create mode 100644 drivers/mfd/dln2.c
> create mode 100644 include/linux/mfd/dln2.h
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index cbdb109..32d7cab 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -189,6 +189,17 @@ config MFD_DA9063
> Additional drivers must be enabled in order to use the functionality
> of the device.
>
> +config MFD_DLN2
> + tristate "Diolan DLN2 support"
> + select MFD_CORE
> + depends on USB
> + help
> +

I've removed this line and applied the set.

I will send out a pull-request to the other Maintainers shortly.

[...]

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Lee Jones
Linaro STMicroelectronics Landing Team Lead
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