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Date:   Wed, 11 Nov 2020 11:48:55 +0530
From:   Viresh Kumar <viresh.kumar@linaro.org>
To:     Dmitry Osipenko <digetx@gmail.com>
Cc:     Thierry Reding <thierry.reding@gmail.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Georgi Djakov <georgi.djakov@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Peter De Schrijver <pdeschrijver@nvidia.com>,
        MyungJoo Ham <myungjoo.ham@samsung.com>,
        Kyungmin Park <kyungmin.park@samsung.com>,
        Chanwoo Choi <cw00.choi@samsung.com>,
        Mikko Perttunen <cyndis@kapsi.fi>,
        Viresh Kumar <vireshk@kernel.org>,
        Peter Geis <pgwipeout@gmail.com>,
        Nicolas Chauvet <kwizart@gmail.com>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH v8 09/26] memory: tegra30: Support interconnect framework
Message-ID: <20201111061855.2azilyhfoxwzpoir@vireshk-i7>
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 <20201111055313.tefidnmc7f4yb3jk@vireshk-i7>
 <185e9140-fdce-29ef-68c3-aa7da02b249d@gmail.com>
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On 11-11-20, 09:14, Dmitry Osipenko wrote:
> 11.11.2020 08:53, Viresh Kumar пишет:
> >> +static int tegra_emc_opp_table_init(struct tegra_emc *emc)
> >> +{
> >> +	struct opp_table *reg_opp_table = NULL, *clk_opp_table, *hw_opp_table;
> >> +	u32 hw_version = BIT(tegra_sku_info.soc_speedo_id);
> >> +	const char *rname = "core";
> >> +	int err;
> >> +
> >> +	/*
> >> +	 * Legacy device-trees don't have OPP table and EMC driver isn't
> >> +	 * useful in this case.
> >> +	 */
> >> +	if (!device_property_present(emc->dev, "operating-points-v2")) {
> > I don't understand why you want to check this ? The below call to
> > dev_pm_opp_of_add_table() will fail anyway and that should be good for
> > you.
> > 
> 
> The dev_pm_opp_of_add_table() will produce a error message which doesn't
> give a clue about what's wrong, i.e. that device-tree needs to be updated.

If you think that you need to print something more, then you can do
that in the error message you print when dev_pm_opp_of_add_table()
fails. I would suggest to drop this redundant check here.

-- 
viresh