From patchwork Thu Mar 31 16:24:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Walle X-Patchwork-Id: 12797460 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61EDFC433F5 for ; Thu, 31 Mar 2022 16:24:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238796AbiCaQ01 (ORCPT ); Thu, 31 Mar 2022 12:26:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238470AbiCaQ00 (ORCPT ); Thu, 31 Mar 2022 12:26:26 -0400 Received: from ssl.serverraum.org (ssl.serverraum.org [IPv6:2a01:4f8:151:8464::1:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC73F5F259; Thu, 31 Mar 2022 09:24:38 -0700 (PDT) Received: from mwalle01.kontron.local. (unknown [213.135.10.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id 0054E22239; Thu, 31 Mar 2022 18:24:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1648743877; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=YoXYCnKbi0kJIQuVrzMzuw3ksCjox4S4pa7P2fxzap8=; b=LwQdBrNeYj0enuPVaA4BJEG3ptbw0RmM+xdPCKuzASQBoQnKwC5Y22LP15rMpJpeySL4Hv JnzMWobKhZcIvy/rZ1AIoroDiEhGcBsIB+sbD71J5Tix0DPybcpwZLv9GkKbMHZb0QgISG x5Yw8iS3chjaTpm2jIYQyeLWiJK98Tg= From: Michael Walle To: Jean Delvare , Guenter Roeck , Rob Herring , Krzysztof Kozlowski Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Walle Subject: [PATCH v3 0/4] hwmon: add lan9668 driver Date: Thu, 31 Mar 2022 18:24:27 +0200 Message-Id: <20220331162431.3648535-1-michael@walle.cc> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org Add a temperature and fan controller driver for the Microchip LAN9668 SoC. The temperature sensor uses a polynomial to calculate the actual temperature. Fortunately, the bt1-pvt already has such a calculation. It seems that the LAN9668 uses the same Analog Bits sensor as the BT1 although with a different characteristic. To be able to reuse the code move it to lib/ as it seems pretty generic to calculate any polynomial using integers only, which might also be used by other parts of the kernel. Another option might be to move the code to hwmon-poly.c, I'm not sure. Thoughts? I also plan on submitting patches to add temperature sensor support for the GPYxxx and LAN8814 PHYs which also use polynomial_calc(). The last two patches adds the actual driver and the dt-binding for it. changes since v2: - strip unwanted copy pasta.. oops - use "select REGMAP" instead of "depends on" changes since v1: - add doc string to polynomial_calc(), moved the comment into the function. - add missing "select POLYNOMIAL" to the bt1_pvt driver Kconfig symbol - add hwmon driver documentation - cache sys_clk rate during probe - add missing ERR_CAST() - adapted comment for the PPS->RPM calculation - add temporary variable in lan966x_hwmon_read_pwm_freq() Michael Walle (4): lib: add generic polynomial calculation hwmon: (bt1-pvt) use generic polynomial functions dt-bindings: hwmon: add Microchip LAN966x bindings hwmon: add driver for the Microchip LAN966x SoC .../bindings/hwmon/microchip,lan966x.yaml | 53 +++ Documentation/hwmon/lan966x.rst | 40 ++ drivers/hwmon/Kconfig | 13 + drivers/hwmon/Makefile | 1 + drivers/hwmon/bt1-pvt.c | 50 +-- drivers/hwmon/lan966x-hwmon.c | 390 ++++++++++++++++++ include/linux/polynomial.h | 35 ++ lib/Kconfig | 3 + lib/Makefile | 2 + lib/polynomial.c | 108 +++++ 10 files changed, 658 insertions(+), 37 deletions(-) create mode 100644 Documentation/devicetree/bindings/hwmon/microchip,lan966x.yaml create mode 100644 Documentation/hwmon/lan966x.rst create mode 100644 drivers/hwmon/lan966x-hwmon.c create mode 100644 include/linux/polynomial.h create mode 100644 lib/polynomial.c