From patchwork Sun Jan 10 19:53:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Lindgren X-Patchwork-Id: 360292 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1D5CC43332 for ; Sun, 10 Jan 2021 19:55:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CB376225A9 for ; Sun, 10 Jan 2021 19:55:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726827AbhAJTze (ORCPT ); Sun, 10 Jan 2021 14:55:34 -0500 Received: from muru.com ([72.249.23.125]:42506 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726479AbhAJTzd (ORCPT ); Sun, 10 Jan 2021 14:55:33 -0500 Received: from hillo.muru.com (localhost [127.0.0.1]) by muru.com (Postfix) with ESMTP id F3F0C88C3; Sun, 10 Jan 2021 19:54:23 +0000 (UTC) From: Tony Lindgren To: Sebastian Reichel Cc: linux-pm@vger.kernel.org, linux-omap@vger.kernel.org, Arthur Demchenkov , Carl Philipp Klemm , Merlijn Wajer , Pavel Machek Subject: [PATCH 09/15] power: supply: cpcap-charger: Provide state updates for battery from charger Date: Sun, 10 Jan 2021 21:53:57 +0200 Message-Id: <20210110195403.13758-10-tony@atomide.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210110195403.13758-1-tony@atomide.com> References: <20210110195403.13758-1-tony@atomide.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org We want to have the battery update it's status when the charge is done, and when the charger is disconnected. Otherwise the battery does not know when it's full unless there's a userspace app polling the battery status. To do this, we add supplied_to handling to cpcap-battery, and implement power_supply_changed() for cpcap-charger. When cpcap-charger calls power_supply_changed(), cpcap-battery will update it's status. Let's also use new_state variable for the POWER_SUPPLY_STATUS_CHARGING case to have unified handling for the switch. Cc: Arthur Demchenkov Cc: Carl Philipp Klemm Cc: Merlijn Wajer Cc: Pavel Machek Signed-off-by: Tony Lindgren --- drivers/power/supply/cpcap-battery.c | 13 +++++++++++ drivers/power/supply/cpcap-charger.c | 34 ++++++++++++++++++++++------ 2 files changed, 40 insertions(+), 7 deletions(-) diff --git a/drivers/power/supply/cpcap-battery.c b/drivers/power/supply/cpcap-battery.c --- a/drivers/power/supply/cpcap-battery.c +++ b/drivers/power/supply/cpcap-battery.c @@ -416,6 +416,18 @@ static int cpcap_battery_update_status(struct cpcap_battery_ddata *ddata) return 0; } +/* + * Update battery status when cpcap-charger calls power_supply_changed(). + * This allows us to detect battery full condition before the charger + * disconnects. + */ +static void cpcap_battery_external_power_changed(struct power_supply *psy) +{ + union power_supply_propval prop; + + power_supply_get_property(psy, POWER_SUPPLY_PROP_STATUS, &prop); +} + static enum power_supply_property cpcap_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_PRESENT, @@ -914,6 +926,7 @@ static int cpcap_battery_probe(struct platform_device *pdev) psy_desc->get_property = cpcap_battery_get_property; psy_desc->set_property = cpcap_battery_set_property; psy_desc->property_is_writeable = cpcap_battery_property_is_writeable; + psy_desc->external_power_changed = cpcap_battery_external_power_changed; psy_cfg.of_node = pdev->dev.of_node; psy_cfg.drv_data = ddata; diff --git a/drivers/power/supply/cpcap-charger.c b/drivers/power/supply/cpcap-charger.c --- a/drivers/power/supply/cpcap-charger.c +++ b/drivers/power/supply/cpcap-charger.c @@ -613,6 +613,16 @@ static void cpcap_charger_disconnect(struct cpcap_charger_ddata *ddata, { int error; + /* Update battery state before disconnecting the charger */ + switch (state) { + case POWER_SUPPLY_STATUS_DISCHARGING: + case POWER_SUPPLY_STATUS_FULL: + power_supply_changed(ddata->usb); + break; + default: + break; + } + error = cpcap_charger_disable(ddata); if (error) { cpcap_charger_update_state(ddata, POWER_SUPPLY_STATUS_UNKNOWN); @@ -628,7 +638,7 @@ static void cpcap_usb_detect(struct work_struct *work) { struct cpcap_charger_ddata *ddata; struct cpcap_charger_ints_state s; - int error; + int error, new_state; ddata = container_of(work, struct cpcap_charger_ddata, detect_work.work); @@ -662,19 +672,23 @@ static void cpcap_usb_detect(struct work_struct *work) case POWER_SUPPLY_STATUS_CHARGING: if (s.chrgcurr2) break; + new_state = POWER_SUPPLY_STATUS_FULL; + if (s.chrgcurr1 && s.vbusvld) { - cpcap_charger_disconnect(ddata, - POWER_SUPPLY_STATUS_FULL, - HZ * 5); + cpcap_charger_disconnect(ddata, new_state, HZ * 5); return; } break; case POWER_SUPPLY_STATUS_FULL: if (!s.chrgcurr2) break; - cpcap_charger_disconnect(ddata, - POWER_SUPPLY_STATUS_NOT_CHARGING, - HZ * 5); + if (s.vbusvld) + new_state = POWER_SUPPLY_STATUS_NOT_CHARGING; + else + new_state = POWER_SUPPLY_STATUS_DISCHARGING; + + cpcap_charger_disconnect(ddata, new_state, HZ * 5); + return; default: break; @@ -832,6 +846,10 @@ static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata) return error; } +static char *cpcap_charger_supplied_to[] = { + "battery", +}; + static const struct power_supply_desc cpcap_charger_usb_desc = { .name = "usb", .type = POWER_SUPPLY_TYPE_USB, @@ -889,6 +907,8 @@ static int cpcap_charger_probe(struct platform_device *pdev) psy_cfg.of_node = pdev->dev.of_node; psy_cfg.drv_data = ddata; + psy_cfg.supplied_to = cpcap_charger_supplied_to; + psy_cfg.num_supplicants = ARRAY_SIZE(cpcap_charger_supplied_to), ddata->usb = devm_power_supply_register(ddata->dev, &cpcap_charger_usb_desc,