From: Russell King - ARM Linux admin Subject: [PATCH RFC 0/6] PWM fan support on Clearfog gt8k Date: Sun, 29 Mar 2020 11:45:50 +0100 Message-ID: <20200329104549.GX25745@shell.armlinux.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from pandora.armlinux.org.uk ([78.32.30.218]:35574 "EHLO pandora.armlinux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728034AbgC2KqB (ORCPT ); Sun, 29 Mar 2020 06:46:01 -0400 Content-Disposition: inline Sender: linux-pwm-owner@vger.kernel.org List-Id: linux-pwm@vger.kernel.org To: Andrew Lunn , Bartosz Golaszewski , devicetree@vger.kernel.org, Gregory Clement , Jason Cooper , Linus Walleij , linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, linux-pwm@vger.kernel.org, Mark Rutland , Rob Herring , Sebastian Hesselbarth , Thierry Reding , Uwe Kleine-Konig Hi, This series adds support for the fan PWM output on the Clearfog GT8K platform, and can potentially be extended to the Macchiatobin. The cooling maps are experimental - it seems to work well for me without the fan speed varying too much, but what I've noticed with fewer entries in the map is instability in the fan speed - it continually toggles between two fan speeds as the temperature rises and falls due to the different fan speed. Hence, this is more for discussion at this point (and in any case, -final is likely to be released today.) .../dts/marvell/armada-8040-clearfog-gt-8k.dts | 125 ++++++++++++ arch/arm64/boot/dts/marvell/armada-cp11x.dtsi | 6 + drivers/gpio/gpio-mvebu.c | 220 ++++++++++++++------- 3 files changed, 275 insertions(+), 76 deletions(-) -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up