Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Fri, 26 May 2023 16:23:20 +0530
From:   Viresh Kumar <viresh.kumar@linaro.org>
To:     Konrad Dybcio <konrad.dybcio@linaro.org>
Cc:     Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
        Stephen Boyd <sboyd@kernel.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Marijn Suijten <marijn.suijten@somainline.org>,
        linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] opp: Provide a function for just setting bandwidth
Message-ID: <20230526105320.pfnu3oxl2cm37ot7@vireshk-i7>
References: <20230526-topic-opp_bw-v1-1-e881091363af@linaro.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230526-topic-opp_bw-v1-1-e881091363af@linaro.org>
Precedence: bulk

On 26-05-23, 11:17, Konrad Dybcio wrote:
> Currently it's not possible to set just the bandwidth if the OPP
> describes other properties (required-opps, opp-hz etc.).
> 
> Introduce dev_pm_opp_set_bw() to solve this problem.

The OPP core (intentionally) doesn't provide any such interface for
freq, volt, bw, level, etc.

Setting just one of the properties for a device is potentially harmful and the
OPP must be set as a whole and so this isn't allowed. There is
dev_pm_opp_set_freq(), but it uses freq to just find the OPP and sets entire OPP
only.

Why should be break this for bw ?

-- 
viresh