linux-kernel - Re: [PATCH v4 4/5] soc: qcom: socinfo: Expose custom attributes

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Date:   Mon, 25 Mar 2019 09:01:21 -0700
From:   Stephen Boyd <swboyd@...omium.org>
To:     Vaishali Thakkar <vaishali.thakkar@...aro.org>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        rafael@...nel.org, Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>
Subject: Re: [PATCH v4 4/5] soc: qcom: socinfo: Expose custom attributes

Quoting Vaishali Thakkar (2019-03-24 10:42:36)
> On Sat, 23 Mar 2019 at 05:31, Stephen Boyd <swboyd@...omium.org> wrote:
> 
> > debugfs_create_devm_seqfile() which may work to print a string from some
> > struct member. I'm not sure why you're using simple_attr_read(). Where
> > does that become important?
> 
> DEFINE_DEBUGFS_ATTRIBUTE has simple_attr helpers which
> expects int value. So, in the case of a string it requires to implement
> similar macro and separate helpers for the same.

Why does DEFINE_DEBUGFS_ATTRIBUTE need to be used?