linux-kernel - Re: [PATCH 1/2] clk: qocm: add qcom_cc_map

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Message-ID: <5153b8f8a6c6ffdc1254e00c47a888ed.sboyd@kernel.org>
Date: Mon, 08 Jul 2024 15:30:22 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Bjorn Andersson <andersson@...nel.org>, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Michael Turquette <mturquette@...libre.com>
Cc: Rob Clark <robdclark@...il.com>, linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] clk: qocm: add qcom_cc_map_norequest

Quoting Dmitry Baryshkov (2024-06-27 22:20:22)
> The GPU clock controllers use memory region that is a part of the GMU's
> memory region. Add qcom_cc_map_norequest() to be used by GPUCC, so that
> GPU driver can use devm_ioremap_resource for GMU resources.

Why does GMU map the gpu clk controller? Does it use those registers? We
don't want to allow two different drivers to map the same region because
then they don't coordinate and write over things.