linux-kernel - Re: [PATCH v3 1/5] firmware: qcom_scm: provide a read-modify-write function

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Message-ID: <CACRpkdb95V5GC81w8fiuLfx_V1DtWYpO33FOfMnArpJeC9SDQA@mail.gmail.com>
Date:   Fri, 17 Mar 2023 21:56:59 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Mukesh Ojha <quic_mojha@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org
Subject: Re: [PATCH v3 1/5] firmware: qcom_scm: provide a read-modify-write function

On Fri, Mar 17, 2023 at 5:28 PM Mukesh Ojha <quic_mojha@...cinc.com> wrote:

> It was released by Srinivas K. that there is a need of
> read-modify-write scm exported function so that it can
> be used by multiple clients.
>
> Let's introduce qcom_scm_io_update_field() which masks
> out the bits and write the passed value to that
> bit-offset. Subsequent patch will use this function.
>
> Suggested-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>

This is starting to reimplement regmap.
In this case regmap_update_bits().

What about just using regmap as accessor for these
registers instead?

Yours,
Linus Walleij