From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [Letux-kernel] [RFC PATCH 0/3] Enable 1GHz support on omap36xx Date: Mon, 9 Sep 2019 09:32:36 -0700 Message-ID: <20190909163236.GP52127@atomide.com> References: <0C1EF64E-B33C-4BFA-A7D3-471DD1B9EE86@goldelico.com> <515048DE-138D-4400-8168-F2B7D61F1005@goldelico.com> <7B3D1D77-3E8C-444F-90B9-6DF2641178B8@goldelico.com> <87420DBD-770F-4C32-9499-A3AEA5876E8A@goldelico.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <87420DBD-770F-4C32-9499-A3AEA5876E8A@goldelico.com> Sender: linux-kernel-owner@vger.kernel.org To: "H. Nikolaus Schaller" Cc: Adam Ford , =?utf-8?B?QW5kcsOp?= Roth , Linux-OMAP , Discussions about the Letux Kernel , Linux Kernel Mailing List , Andreas Kemnade , Nishanth Menon List-Id: linux-omap@vger.kernel.org Hi, * H. Nikolaus Schaller [190909 14:57]: > Another question that came up by private mail from André was if we > should better disable the turbo OPPs of omap34xx and 36xx by default > (status = "disabled";) because there are concerns about overheating > the chips and we have no thermal regulation like for omap4 & 5. > > But this would mean that every board DTS would have to set it explicitly > to "enabled". Yes I started thinking about that too. I think there is a requirement to do the scaling via the voltage processor for the higher modes. And there needs to be some way to automatically change to a lower OPP in some cases. For normal OPPs, using the twl regulator directly should be OK. For the higher modes, maybe we could pass the callback functions from arch/arm/mach-omap2/voltage.c for the twl regulator so the voltage processor hardware can handle them directly. Or add a separate regulator driver operating the voltages like Nishanth posted patches for earlier. Regards, Tony