From mboxrd@z Thu Jan  1 00:00:00 1970
From: JeffyChen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Subject: Re: [PATCH v8 11/14] iommu/rockchip: Use OF_IOMMU to attach devices
	automatically
Date: Mon, 26 Mar 2018 15:57:36 +0800
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To: Daniel Kurtz <djkurtz-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Cc: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>, open-Y9sIeH5OGRo@public.gmane.org, list-Y9sIeH5OGRo@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Ricky Liang <jcliang-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>, "open list:ARM/Rockchip SoC..." <linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>, IOMMU DRIVERS <iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
List-Id: linux-rockchip.vger.kernel.org

Hi Daniel,

Thanks for your reply.

On 03/26/2018 02:31 PM, Daniel Kurtz wrote:
>> >+struct rk_iommudata {
>> >+       struct rk_iommu *iommu;
>> >+};
> Why do we need this struct?  Can't we just assign a pointer to struct
> rk_iommu directly to dev->archdata.iommu?
>
hmmm, i was trying to add more device related data in patch[13]:

  struct rk_iommudata {
+	struct device_link *link; /* runtime PM link from IOMMU to master */
  	struct rk_iommu *iommu;
  };
>