linux-kernel - Re: [PATCH v2 01/17] rpmsg: Enable matching devices with drivers based on DT

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Date:   Wed, 07 Sep 2016 18:46:32 -0700
From:   spjoshi@...eaurora.org
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Ohad Ben-Cohen <ohad@...ery.com>, linux-remoteproc@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-remoteproc-owner@...r.kernel.org
Subject: Re: [PATCH v2 01/17] rpmsg: Enable matching devices with drivers
 based on DT

On 2016-09-01 15:27, Bjorn Andersson wrote:
> Make it possible to match rpmsg devices based on device tree node, in
> addition to the id table. In some of these cases the rpmsg driver would
> not have a id_table, so make this optional.
> 
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
> 
> Changes since v1:
> - None
> 
>  drivers/rpmsg/virtio_rpmsg_bus.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c 
> b/drivers/rpmsg/virtio_rpmsg_bus.c
> index 4a4374cc6a59..495fa0a282d3 100644
> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
> @@ -33,6 +33,7 @@
>  #include <linux/wait.h>
>  #include <linux/rpmsg.h>
>  #include <linux/mutex.h>
> +#include <linux/of_device.h>
> 
>  /**
>   * struct virtproc_info - virtual remote processor state
> @@ -175,11 +176,12 @@ static int rpmsg_dev_match(struct device *dev,
> struct device_driver *drv)
>  	const struct rpmsg_device_id *ids = rpdrv->id_table;
>  	unsigned int i;
> 
> -	for (i = 0; ids[i].name[0]; i++)
> -		if (rpmsg_id_match(rpdev, &ids[i]))
> -			return 1;
> +	if (ids)
> +		for (i = 0; ids[i].name[0]; i++)
> +			if (rpmsg_id_match(rpdev, &ids[i]))
> +				return 1;
> 
> -	return 0;
> +	return of_driver_match_device(dev, drv);

Do we care falling back to acpi_driver_match_device if 
of_driver_match_device fails (something similar to what platform_match 
does)?

>  }
> 
>  static int rpmsg_uevent(struct device *dev, struct kobj_uevent_env 
> *env)

Sarang

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