From patchwork Thu May 28 14:28:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11575953 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EF7FB90 for ; Thu, 28 May 2020 14:28:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E25EB20888 for ; Thu, 28 May 2020 14:28:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391156AbgE1O2S (ORCPT ); Thu, 28 May 2020 10:28:18 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:42320 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391025AbgE1O2R (ORCPT ); Thu, 28 May 2020 10:28:17 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 7F4BA8030839; Thu, 28 May 2020 14:28:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pSrX6G4b6fWC; Thu, 28 May 2020 17:28:09 +0300 (MSK) From: Serge Semin To: Jean Delvare , Guenter Roeck CC: Serge Semin , Serge Semin , Maxim Kaurkin , Maxim Kaurkin , Alexey Malahov , Pavel Parkhomenko , Ramil Zaripov , Ekaterina Skachko , Vadim Vlasov , Alexey Kolotnikov , Thomas Bogendoerfer , Arnd Bergmann , Rob Herring , , , , Subject: [PATCH v4 0/3] hwmon: Add Baikal-T1 SoC Process, Voltage and Temp sensor support Date: Thu, 28 May 2020 17:28:02 +0300 Message-ID: <20200528142805.29115-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org In order to keep track of Baikal-T1 SoC power consumption and make sure the chip heating is within the normal temperature limits, there is a dedicated hardware monitor sensor embedded into the SoC. It is based on the Analog Bits PVT sensor but equipped with a vendor-specific control wrapper, which ease an access to the sensors functionality. Fist of all it provides an accessed to the sampled Temperature, Voltage and Low/Standard/High Voltage thresholds. In addition the wrapper generates an interrupt in case if one enabled for alarm thresholds or data ready event. All of these functionality is implemented in the Baikal-T1 PVT driver submitted within this patchset. Naturally there is also a patch, which creates a corresponding yaml-based dt-binding file for the sensor. This patchset is rebased and tested on the mainline Linux kernel 5.6-rc4: base-commit: 0e698dfa2822 ("Linux 5.7-rc4") tag: v5.7-rc4 Note new vendor prefix for Baikal-T1 PVT device will be added in the framework of the next patchset: https://lkml.org/lkml/2020/5/6/1047 Changelog v2: - Don't use a multi-arg clock phandle reference in the examples dt-bindings property. Thus reundant include pre-processor statement can be removed. - Rearrange the SoBs with adding Maxim' co-development tag. - Lowercase the node-name in the dt-schema example. - Add dual license header to the dt-bindings file. - Replace "additionalProperties: false" property with "unevaluatedProperties: false". - Discard label definition from the binding example. - Discard handwritten IO-access wrappers. Use normal readl/writel instead. - Use generic FIELD_{GET,PREP} macros instead of handwritten ones. - Since the driver depends on the OF config we can remove of_match_ptr() macro utilization. - Don't print error-message if no platform IRQ found. Just return an error. - Remove probe-status info string printout. - Our corporate email server doesn't change Message-Id anymore, so the patchset is resubmitted being in the cover-letter-threaded format. Link: https://lore.kernel.org/linux-hwmon/20200510103211.27905-1-Sergey.Semin@baikalelectronics.ru/ Changelog v3: - Add bt1-pvt into the Documentation/hwmon/index.rst file. - Discard explicit "default n" from the SENSORS_BT1_PVT_ALARMS config. - Use "depends on SENSORS_BT1_PVT" statement instead of if-endif kbuild config clause. - Alphabetically order the include macro operators. - Discard unneeded include macro in the header file. - Use new generic interface of the hwmon alarms notifications introduced in the first patch (based on hwmon_notify_event()). - Add more descriptive information regarding the temp1_trim attribute. - Discard setting the platforms device private data by using platform_set_drvdata(). It's redundant since unused in the driver. - Pass "pvt" hwmon name instead of dev_name(dev) to devm_hwmon_device_register_with_info(). - Add "baikal,pvt-temp-trim-millicelsius" temperature trim DT property support. - Discard kernel log warnings printed from the ISR when either min or max threshold levels are crossed. - Discard CONFIG_OF dependency since there is non at compile-time. Link: https://lore.kernel.org/linux-hwmon/20200526133823.20466-1-Sergey.Semin@baikalelectronics.ru Changelog v4: - Rename temp1_trim to the temp1_offset and use the standard API to expose the attribute. - Rename "baikal,pvt-temp-trim-millicelsius" DT property to "baikal,pvt-temp-offset-millicelsius". - Switch "const static" order to be "static const" where it's applicable. - Add missing headers "linux/io.h" and "linux/of.h". - Add static qualifier to the pvt_hwmon_write() method, which has been missed there by mistake. Co-developed-by: Maxim Kaurkin Signed-off-by: Maxim Kaurkin Signed-off-by: Serge Semin Cc: Alexey Malahov Cc: Pavel Parkhomenko Cc: Ramil Zaripov Cc: Ekaterina Skachko Cc: Vadim Vlasov Cc: Alexey Kolotnikov Cc: Thomas Bogendoerfer Cc: Arnd Bergmann Cc: Rob Herring Cc: linux-mips@vger.kernel.org Cc: linux-hwmon@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Guenter Roeck (1): hwmon: Add notification support Serge Semin (2): dt-bindings: hwmon: Add Baikal-T1 PVT sensor binding hwmon: Add Baikal-T1 PVT sensor driver .../bindings/hwmon/baikal,bt1-pvt.yaml | 107 ++ Documentation/hwmon/bt1-pvt.rst | 117 ++ Documentation/hwmon/index.rst | 1 + drivers/hwmon/Kconfig | 25 + drivers/hwmon/Makefile | 1 + drivers/hwmon/bt1-pvt.c | 1146 +++++++++++++++++ drivers/hwmon/bt1-pvt.h | 244 ++++ drivers/hwmon/hwmon.c | 69 +- include/linux/hwmon.h | 3 + 9 files changed, 1710 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/hwmon/baikal,bt1-pvt.yaml create mode 100644 Documentation/hwmon/bt1-pvt.rst create mode 100644 drivers/hwmon/bt1-pvt.c create mode 100644 drivers/hwmon/bt1-pvt.h