On Thu, Jun 30, 2016 at 06:38:53PM +0100, Nick Dyer wrote:
> Function 54 implements access to various RMI4 diagnostic features.
>
> This patch adds support for retrieving this data. It registers a V4L2
> device to output the data to user space.
>
> Signed-off-by: Nick Dyer <nick@xxxxxxxxxxxxx>
> ---
> drivers/input/rmi4/Kconfig | 11 +
> drivers/input/rmi4/Makefile | 1 +
> drivers/input/rmi4/rmi_bus.c | 3 +
> drivers/input/rmi4/rmi_driver.h | 1 +
> drivers/input/rmi4/rmi_f54.c | 754 ++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 770 insertions(+)
> create mode 100644 drivers/input/rmi4/rmi_f54.c
[...]
> index 0000000..2361157
> --- /dev/null
> +++ b/drivers/input/rmi4/rmi_f54.c
[...]
> +static int rmi_f54_vidioc_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + struct f54_data *f54 = video_drvdata(file);
> +
> + strlcpy(cap->driver, F54_NAME, sizeof(cap->driver));
> + strlcpy(cap->card, SYNAPTICS_INPUT_DEVICE_NAME, sizeof(cap->card));
> + strlcpy(cap->bus_info, dev_name(&f54->fn->dev), sizeof(cap->bus_info));
I need to correct this to prefix the bus. RMI4 registers its own bus, so
devices appear under eg /sys/bus/rmi4/devices/rmi4-00.fn54
So I will change to:
snprintf(cap->bus_info, sizeof(cap->bus_info), "rmi4:%s", dev_name(&f54->fn->dev));
And I will need to add rmi4 to the valid prefixes in v4l2-complaince as well.
> +
> + return 0;
> +}
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