Re: [PATCH v3] i2c: axxia: support slave mode
From: Wolfram Sang
Date: Thu Aug 29 2019 - 15:08:45 EST
On Mon, Aug 19, 2019 at 09:07:07AM +0000, Adamski, Krzysztof (Nokia - PL/Wroclaw) wrote:
> This device contains both master and slave controllers which can be
> enabled simultaneously. Both controllers share the same SDA/SCL lines
> and interrupt source but has separate control and status registers.
> Controllers also works in loopback mode - slave device can communicate
> with its own master controller internally. The controller can handle up
> to two addresses, both of which may be 10 bit. Most of the logic
> (sending (N)ACK, handling repeated start or switching between
> write/read) is handled automatically which makes working with this
> controller quite easy.
> For simplicity, this patch adds basic support, limiting to only one
> slave address. Support for the 2nd device may be added in the future.
> Note that synchronize_irq() is used to ensure any running slave interrupt
> is finished to make sure slave i2c_client structure can be safely used
> by i2c_slave_event.
> Signed-off-by: Krzysztof Adamski <krzysztof.adamski@xxxxxxxxx>
Applied to for-next, thanks!
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