linux-kernel - Re: [PATCH v4 2/3] bus: mhi: host: Add a new API for getting channel doorbell address

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Date: Tue, 23 Apr 2024 12:45:06 -0600
From: Jeffrey Hugo <quic_jhugo@...cinc.com>
To: Qiang Yu <quic_qianyu@...cinc.com>, <mani@...nel.org>
CC: <mhi@...ts.linux.dev>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <quic_cang@...cinc.com>,
        <quic_mrana@...cinc.com>
Subject: Re: [PATCH v4 2/3] bus: mhi: host: Add a new API for getting channel
 doorbell address

On 4/23/2024 4:33 AM, Qiang Yu wrote:
> Some controllers may want to know the address of a certain doorbell. Hence
> add a new API where we read CHDBOFF register to get the base address of
> doorbell, so that the controller can calculate the address of the doorbell
> it wants by adding additional offset.
> 
> Signed-off-by: Qiang Yu <quic_qianyu@...cinc.com>
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index d968e1a..cb3b676 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -816,4 +816,10 @@ int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir,
>    */
>   bool mhi_queue_is_full(struct mhi_device *mhi_dev, enum dma_data_direction dir);
>   
> +/**
> + * mhi_get_channel_doorbell_offset - Get the channel doorbell offset
> + * @mhi_cntrl: MHI controller
> + * @chdb_offset: Channel doorbell offset
> + */
> +int mhi_get_channel_doorbell_offset(struct mhi_controller *mhi_cntrl, u32 *chdb_offset);

Should have a blank line here before the #endif just like how the file 
was before this change

>   #endif /* _MHI_H_ */

With the above
Reviewed-by: Jeffrey Hugo <quic_jhugo@...cinc.com>