From patchwork Sun Jan 30 20:45:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 538389 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 35F42C4167B for ; Sun, 30 Jan 2022 20:47:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356298AbiA3Urb (ORCPT ); Sun, 30 Jan 2022 15:47:31 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:49687 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356320AbiA3UrY (ORCPT ); Sun, 30 Jan 2022 15:47:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1643575644; 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: in-reply-to:in-reply-to:references:references; bh=YW1BIUN5jOVdVEK6YUCLi1iFqHOlFG02FpWo0wk7en4=; b=R8BkBfzSFrYNbSbTbRngAtjCD5Df1V4Uqnt2JX4PxkmoTmIt+LfMp5ZY+DJZGR4uy1wH3G 3d3+TxTJcagxhBSAQY5Rfw14bJvcCNqutuyJhZ+eGdt550geCuPPYSWl7D6fTpTmpJB/9f 9fGmleeDLyprTDZUMw5q3956Dxf5OXA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-264-WMi23sfeNASuHxijnNHlMw-1; Sun, 30 Jan 2022 15:47:20 -0500 X-MC-Unique: WMi23sfeNASuHxijnNHlMw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 91E2318397BE; Sun, 30 Jan 2022 20:47:18 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.192.60]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2DBBA61093; Sun, 30 Jan 2022 20:47:15 +0000 (UTC) From: Hans de Goede To: "Rafael J . Wysocki" , Mika Westerberg , Mark Gross , Andy Shevchenko , Wolfram Sang , Lee Jones , Sebastian Reichel , MyungJoo Ham , Chanwoo Choi , Ard Biesheuvel Cc: Hans de Goede , Len Brown , linux-acpi@vger.kernel.org, Yauhen Kharuzhy , Tsuchiya Yuto , Fabio Aiuto , platform-driver-x86@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org Subject: [PATCH v4 12/20] power: supply: bq25890: Support higher charging voltages through Pump Express+ protocol Date: Sun, 30 Jan 2022 21:45:49 +0100 Message-Id: <20220130204557.15662-13-hdegoede@redhat.com> In-Reply-To: <20220130204557.15662-1-hdegoede@redhat.com> References: <20220130204557.15662-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Yauhen Kharuzhy Add a "linux,pump-express-vbus-max" property which indicates if the Pump Express+ protocol should be used to increase the charging protocol. If this new property is set and a DCP charger is detected then request a higher charging voltage through the Pump Express+ protocol. So far this new property is only used on x86/ACPI (non devicetree) devs, IOW it is not used in actual devicetree files. The devicetree-bindings maintainers have requested properties like these to not be added to the devicetree-bindings, so the new property is deliberately not added to the existing devicetree-bindings. Changes by Hans de Goede: - Port to my bq25890 patch-series + various cleanups - Make behavior configurable through a new "linux,pump-express-vbus-max" device-property - Sleep 1 second before re-checking the Vbus voltage after requesting it to be raised, to ensure that the ADC has time to sampled the new Vbus - Add VBUSV bq25890_tables[] entry and use it in bq25890_get_vbus_voltage() - Tweak commit message Signed-off-by: Yauhen Kharuzhy Co-developed-by: Hans de Goede Signed-off-by: Hans de Goede --- Changes in v3: - Re-indent bq25890_tables to make checkpatch happy - Add _uV postfix to PUMP_EXPRESS_VBUS_MARGIN - Use regmap_field_read_poll_timeout() to wait for F_PUMPX_UP bit to clear - Don't error check device_property_read_u32() call for optional prop Changes in v2: - New patch in v2 of this series, also see "Changes by Hans de Goede" --- drivers/power/supply/bq25890_charger.c | 92 +++++++++++++++++++++++--- 1 file changed, 84 insertions(+), 8 deletions(-) diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c index 3de72f0fbf3e..179abed92f9b 100644 --- a/drivers/power/supply/bq25890_charger.c +++ b/drivers/power/supply/bq25890_charger.c @@ -27,6 +27,10 @@ #define BQ25895_ID 7 #define BQ25896_ID 0 +#define PUMP_EXPRESS_START_DELAY (5 * HZ) +#define PUMP_EXPRESS_MAX_TRIES 6 +#define PUMP_EXPRESS_VBUS_MARGIN_uV 1000000 + enum bq25890_chip_version { BQ25890, BQ25892, @@ -107,6 +111,7 @@ struct bq25890_device { struct usb_phy *usb_phy; struct notifier_block usb_nb; struct work_struct usb_work; + struct delayed_work pump_express_work; unsigned long usb_event; struct regmap *rmap; @@ -114,6 +119,7 @@ struct bq25890_device { bool skip_reset; bool read_back_init_data; + u32 pump_express_vbus_max; enum bq25890_chip_version chip_version; struct bq25890_init_data init_data; struct bq25890_state state; @@ -265,6 +271,7 @@ enum bq25890_table_ids { TBL_VREG, TBL_BOOSTV, TBL_SYSVMIN, + TBL_VBUSV, TBL_VBATCOMP, TBL_RBATCOMP, @@ -325,14 +332,15 @@ static const union { } bq25890_tables[] = { /* range tables */ /* TODO: BQ25896 has max ICHG 3008 mA */ - [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */ - [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */ - [TBL_IINLIM] = { .rt = {100000, 3250000, 50000} }, /* uA */ - [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */ - [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */ - [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */ - [TBL_VBATCOMP] ={ .rt = {0, 224000, 32000} }, /* uV */ - [TBL_RBATCOMP] ={ .rt = {0, 140000, 20000} }, /* uOhm */ + [TBL_ICHG] = { .rt = {0, 5056000, 64000} }, /* uA */ + [TBL_ITERM] = { .rt = {64000, 1024000, 64000} }, /* uA */ + [TBL_IINLIM] = { .rt = {100000, 3250000, 50000} }, /* uA */ + [TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */ + [TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */ + [TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */ + [TBL_VBUSV] = { .rt = {2600000, 15300000, 100000} }, /* uV */ + [TBL_VBATCOMP] = { .rt = {0, 224000, 32000} }, /* uV */ + [TBL_RBATCOMP] = { .rt = {0, 140000, 20000} }, /* uOhm */ /* lookup tables */ [TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} }, @@ -435,6 +443,17 @@ static bool bq25890_is_adc_property(enum power_supply_property psp) static irqreturn_t __bq25890_handle_irq(struct bq25890_device *bq); +static int bq25890_get_vbus_voltage(struct bq25890_device *bq) +{ + int ret; + + ret = bq25890_field_read(bq, F_VBUSV); + if (ret < 0) + return ret; + + return bq25890_find_val(ret, TBL_VBUSV); +} + static int bq25890_power_supply_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) @@ -613,6 +632,11 @@ static void bq25890_charger_external_power_changed(struct power_supply *psy) switch (val.intval) { case POWER_SUPPLY_USB_TYPE_DCP: input_current_limit = bq25890_find_idx(2000000, TBL_IINLIM); + if (bq->pump_express_vbus_max) { + queue_delayed_work(system_power_efficient_wq, + &bq->pump_express_work, + PUMP_EXPRESS_START_DELAY); + } break; case POWER_SUPPLY_USB_TYPE_CDP: case POWER_SUPPLY_USB_TYPE_ACA: @@ -878,6 +902,53 @@ static int bq25890_set_otg_cfg(struct bq25890_device *bq, u8 val) return ret; } +static void bq25890_pump_express_work(struct work_struct *data) +{ + struct bq25890_device *bq = + container_of(data, struct bq25890_device, pump_express_work.work); + int voltage, i, ret; + + dev_dbg(bq->dev, "Start to request input voltage increasing\n"); + + /* Enable current pulse voltage control protocol */ + ret = bq25890_field_write(bq, F_PUMPX_EN, 1); + if (ret < 0) + goto error_print; + + for (i = 0; i < PUMP_EXPRESS_MAX_TRIES; i++) { + voltage = bq25890_get_vbus_voltage(bq); + if (voltage < 0) + goto error_print; + dev_dbg(bq->dev, "input voltage = %d uV\n", voltage); + + if ((voltage + PUMP_EXPRESS_VBUS_MARGIN_uV) > + bq->pump_express_vbus_max) + break; + + ret = bq25890_field_write(bq, F_PUMPX_UP, 1); + if (ret < 0) + goto error_print; + + /* Note a single PUMPX up pulse-sequence takes 2.1s */ + ret = regmap_field_read_poll_timeout(bq->rmap_fields[F_PUMPX_UP], + ret, !ret, 100000, 3000000); + if (ret < 0) + goto error_print; + + /* Make sure ADC has sampled Vbus before checking again */ + msleep(1000); + } + + bq25890_field_write(bq, F_PUMPX_EN, 0); + + dev_info(bq->dev, "Hi-voltage charging requested, input voltage is %d mV\n", + voltage); + + return; +error_print: + dev_err(bq->dev, "Failed to request hi-voltage charging\n"); +} + static void bq25890_usb_work(struct work_struct *data) { int ret; @@ -1068,6 +1139,10 @@ static int bq25890_fw_probe(struct bq25890_device *bq) int ret; struct bq25890_init_data *init = &bq->init_data; + /* Optional, left at 0 if property is not present */ + device_property_read_u32(bq->dev, "linux,pump-express-vbus-max", + &bq->pump_express_vbus_max); + bq->skip_reset = device_property_read_bool(bq->dev, "linux,skip-reset"); bq->read_back_init_data = device_property_read_bool(bq->dev, "linux,read-back-settings"); @@ -1100,6 +1175,7 @@ static int bq25890_probe(struct i2c_client *client, bq->dev = dev; mutex_init(&bq->lock); + INIT_DELAYED_WORK(&bq->pump_express_work, bq25890_pump_express_work); bq->rmap = devm_regmap_init_i2c(client, &bq25890_regmap_config); if (IS_ERR(bq->rmap))