From patchwork Thu Jul 21 16:17:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Morgan X-Patchwork-Id: 592739 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 48F40C43334 for ; Thu, 21 Jul 2022 16:18:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233729AbiGUQSi (ORCPT ); Thu, 21 Jul 2022 12:18:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43550 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231514AbiGUQSJ (ORCPT ); Thu, 21 Jul 2022 12:18:09 -0400 Received: from mail-oi1-x234.google.com (mail-oi1-x234.google.com [IPv6:2607:f8b0:4864:20::234]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E01689A73; Thu, 21 Jul 2022 09:17:33 -0700 (PDT) Received: by mail-oi1-x234.google.com with SMTP id o133so2531926oig.13; Thu, 21 Jul 2022 09:17:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=CrienpmK/JKb5On59DyVnzISjRJ+QMGVIPqHV8+Bi4Q=; b=dYF9wX2oQ+ldXB4tLLYM//Lkd5iPcHecBMElWfyevCQdOvjwUaBC9Kmx0UbGQ6xhp9 1cwRiNGqNlKoEI23LvoT0cFoTWauMidgaMdYpo/eGAoK9trl9OXXIAE3Dut4YgFRDHZI juicmpduQTgt+SA6DZT2+y6lqMiGjCp8tH/bDBIdDW0y+WbQx3tkTMCdhXgr059E2LPd oBtuw0KDNxopqaWi76N9i+7kQ9tuh1zYYnnT6ygSO/naAbmksw3a529vI8Pzk1v5NG8f QKENjDWch5XhUMoqwQJmNJXkgw8oXSQOeMHZ5vcW3lrbNujcb3TmvURXiasTxtDyXMWq wK5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=CrienpmK/JKb5On59DyVnzISjRJ+QMGVIPqHV8+Bi4Q=; b=jQ0+rc36bO8N5bmD5M6/Q+80EIBcRjPVGQ2CQSOLQwmney2ln76uGkdI9ufxHVt3Fx KC5Gb53GjMlytKk1prX2s2kE04r3S6qsQsIGQDVlYTQHv68mBYN736RM4Nes+FSBtIE1 vFADxNWgsaHkHxBtM/jLe0gs1t+0b1qwxDcD4Jqks8eVWBR5rV3CsF7pb/ZxqJObIx6G n5JVUDcG3whrTjnhk4chMTsXd4pOSmlJzXfW/GVOuriAzEokewwIDBgDLvCKEJIVZss3 I3ahMIwht5/w4kkEamv0VbHKYvLJflyYdjILgM4Oqa1IDgVIkJ5x8L/tWkeX5XsTHO+t QvAA== X-Gm-Message-State: AJIora/J3rUv0j7O+O53yJmZ47BcltcemzAdAY/B8GBtLmE4oxEhq+P6 PP0v52Fn00FVAe32bB+jkEcW1U1FtPk= X-Google-Smtp-Source: AGRyM1tHbJ4+ofYcRKxSdc0KNBOCFnPuletJT8RsffzqLtINpk0XtbpgjU74DFe2TWs1gpeHLHw9vg== X-Received: by 2002:a05:6808:18a2:b0:33a:afa5:9f71 with SMTP id bi34-20020a05680818a200b0033aafa59f71mr1134393oib.45.1658420252341; Thu, 21 Jul 2022 09:17:32 -0700 (PDT) Received: from wintermute.localdomain (cpe-76-183-134-35.tx.res.rr.com. [76.183.134.35]) by smtp.gmail.com with ESMTPSA id cy18-20020a056830699200b0061cc06a886csm951732otb.9.2022.07.21.09.17.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Jul 2022 09:17:31 -0700 (PDT) From: Chris Morgan To: linux-pm@vger.kernel.org Cc: linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, zhangqing@rock-chips.com, zyw@rock-chips.com, jon.lin@rock-chips.com, sre@kernel.org, heiko@sntech.de, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, lee.jones@linaro.org, Chris Morgan Subject: [RESEND 0/4 v7] power: supply: Add Support for RK817 Charger Date: Thu, 21 Jul 2022 11:17:14 -0500 Message-Id: <20220721161718.29800-1-macroalpha82@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Chris Morgan Resending as remaining prerequisite patches are now mainlined. This series is to add support for the Rockchip rk817 battery charger which is present in all Rockchip RK817 PMICs. The driver was written as a joint effort by Maya Matuszczyk and myself Chris Morgan . The driver requires some basic parameters be described about the battery in the devicetree such as the maximum capacity, the minimum and maximum voltage for the battery, the maximum charge current, the maximum charge voltage, and the value of sample resistors and sleep currents. The hardware itself contains an ADC capable of measuring the voltage, current, and temperature of the battery (though my implementation of an Odroid Go Advance lacks a thermistor for temperature). It also contains a columb counter, registers for tracking the measured voltage and current at boot, and a few bytes of nvram for storing data. Changes from V6: - Updated devicetree binding patch to reference the required prerequisite patch in the correct manner (relocated it below the --- and pointed it to lore.kernel.org). Changes from V5: - Renamed mfd-cell from "battery" to "charger". - Added note for devicetree binding documentation that it requires application of an additional pending patch (to convert documentation to yaml). Changes from V4: - Massively redesigned the battery driver to improve measurement accuracy and reliability. Driver now checks values every 8 seconds (mimicking BSP driver behavior), or whenever a plug event is detected. - Removed OCV, boot voltage, and boot current as values were found to be unreliable. - Updated first-boot behavior to perform a "best guess" at capacity. - Added ability to calibrate columb counter to full state of charge when charger reports full, and added ability calibrate full charge capacity when battery discharges from full charge to minimum voltage. - Expose state of charge as capacity (in percents). - Updated storing of values to nvram to preserve compatibility with BSP kernel. Changes from V3: - Corrected issues in device tree documentation. - Added additional logic to battery to correct for columb counter drift when the device stays plugged in at a full charge state. Changes from V2: - Updated devicetree bindings to use common property units. - Removed unneeded includes. - Updated rk817_chg_cur_to_reg to make more legible. - Simplified formula for displaying calibrated voltage. - Updated power supply type to POWER_SUPPLY_TYPE_USB. - Implemented get/put_unaligned macros for bulk reads and writes. - Changed numerous dev_err() to dev_err_probe(). - Call power_supply_put_battery_info() at end of probe function. - Removed unneeded whitespace. Changes from V1: - Fixed a CLANG warning regarding an uninitalized variable. - Fixed a CLANG warning regarding a pointer as a bool value always returning as true. - Added Maya Matuszczyk to the Signed-off-by. Chris Morgan (4): dt-bindings: Add Rockchip rk817 battery charger support mfd: Add Rockchip rk817 battery charger support power: supply: Add charger driver for Rockchip RK817 arm64: dts: rockchip: add rk817 chg to Odroid Go Advance .../bindings/mfd/rockchip,rk817.yaml | 48 + .../boot/dts/rockchip/rk3326-odroid-go2.dts | 26 + drivers/mfd/rk808.c | 16 +- drivers/power/supply/Kconfig | 6 + drivers/power/supply/Makefile | 1 + drivers/power/supply/rk817_charger.c | 1157 +++++++++++++++++ include/linux/mfd/rk808.h | 91 ++ 7 files changed, 1344 insertions(+), 1 deletion(-) create mode 100644 drivers/power/supply/rk817_charger.c