linux-kernel - Re: [PATCH 1/2] cpufreq: mediatek: Add MT8173 cpufreq driver

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Message-ID: <20150423125620.GB29702@leverpostej>
Date:	Thu, 23 Apr 2015 13:56:23 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	"pi-cheng.chen" <pi-cheng.chen@...aro.org>
Cc:	Viresh Kumar <viresh.kumar@...aro.org>,
	Mike Turquette <mturquette@...aro.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	"Joe.C" <yingjoe.chen@...iatek.com>,
	Eddie Huang <eddie.huang@...iatek.com>,
	Howard Chen <ibanezchen@...il.com>,
	"fan.chen@...iatek.com" <fan.chen@...iatek.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"linux-mediatek@...ts.infradead.org" 
	<linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH 1/2] cpufreq: mediatek: Add MT8173 cpufreq driver

> +/*
> + * This is a temporary solution until we have new OPPv2 bindings. Therefore we
> + * could describe the OPPs with (freq, volt, volt) tuple properly in device
> + * tree.
> + */
> +
> +/* OPP table for LITTLE cores of MT8173 */
> +struct mtk_cpu_opp mt8173_l_opp[] = {
> +       OPP(507000000, 859000, 0),
> +       OPP(702000000, 908000, 0),
> +       OPP(1001000000, 983000, 0),
> +       OPP(1105000000, 1009000, 0),
> +       OPP(1183000000, 1028000, 0),
> +       OPP(1404000000, 1083000, 0),
> +       OPP(1508000000, 1109000, 0),
> +       OPP(1573000000, 1125000, 0),
> +};
> +
> +/* OPP table for big cores of MT8173 */
> +struct mtk_cpu_opp mt8173_b_opp[] = {
> +       OPP(507000000, 828000, 928000),
> +       OPP(702000000, 867000, 967000),
> +       OPP(1001000000, 927000, 1027000),
> +       OPP(1209000000, 968000, 1068000),
> +       OPP(1404000000, 1007000, 1107000),
> +       OPP(1612000000, 1049000, 1149000),
> +       OPP(1807000000, 1089000, 1150000),
> +       OPP(1989000000, 1125000, 1150000),
> +};

We should sort out the OPP bindings if we need to sort out the OPP
bindings. We can't remove these once they're in without causing pain for
everyone with an old DTB.

Mark.
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