From patchwork Mon Aug 8 06:08:48 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenyou Yang X-Patchwork-Id: 9266775 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 6D79A607D6 for ; Mon, 8 Aug 2016 06:24:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5CB742793D for ; Mon, 8 Aug 2016 06:24:06 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4F91527C0B; Mon, 8 Aug 2016 06:24:06 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BA77B279B3 for ; Mon, 8 Aug 2016 06:24:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752125AbcHHGYE (ORCPT ); Mon, 8 Aug 2016 02:24:04 -0400 Received: from eusmtp01.atmel.com ([212.144.249.243]:57613 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752118AbcHHGYD (ORCPT ); Mon, 8 Aug 2016 02:24:03 -0400 Received: from apsmtp01.atmel.com (10.168.254.30) by eusmtp01.atmel.com (10.145.145.31) with Microsoft SMTP Server id 14.3.235.1; Mon, 8 Aug 2016 08:23:58 +0200 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.3.235.1; Mon, 8 Aug 2016 14:31:20 +0800 From: Wenyou Yang To: Sebastian Reichel , Dmitry Eremin-Solenikov , David Woodhouse , Rob Herring , Pawel Moll , Mark Brown , Ian Campbell , "Kumar Gala" CC: , , , Nicolas Ferre , , Wenyou Yang Subject: [PATCH v4 6/7] power: act8945a_charger: Add max current property Date: Mon, 8 Aug 2016 14:08:48 +0800 Message-ID: <1470636529-16387-7-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1470636529-16387-1-git-send-email-wenyou.yang@atmel.com> References: <1470636529-16387-1-git-send-email-wenyou.yang@atmel.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add the power supply's current max property, POWER_SUPPLY_PROP_CURRENT_MAX. Signed-off-by: Wenyou Yang --- Changes in v4: - Fix wrong gpio assignment for chglev_pin. Changes in v3: None Changes in v2: None drivers/power/act8945a_charger.c | 79 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 77 insertions(+), 2 deletions(-) diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c index 2321796..9bfbc87 100644 --- a/drivers/power/act8945a_charger.c +++ b/drivers/power/act8945a_charger.c @@ -84,6 +84,7 @@ struct act8945a_charger { bool init_done; int lbo_pin; + int chgin_level; }; static int act8945a_get_charger_state(struct regmap *regmap, int *val) @@ -267,12 +268,79 @@ static int act8945a_get_capacity_level(struct act8945a_charger *charger, return 0; } +#define MAX_CURRENT_USB_HIGH 450000 +#define MAX_CURRENT_USB_LOW 90000 +#define MAX_CURRENT_USB_PRE 45000 +/* + * Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205 + * Riset = 2.43K + */ +#define MAX_CURRENT_AC_HIGH 886527 +#define MAX_CURRENT_AC_LOW 117305 +#define MAX_CURRENT_AC_HIGH_PRE 88653 +#define MAX_CURRENT_AC_LOW_PRE 11731 + +static int act8945a_get_current_max(struct act8945a_charger *charger, + struct regmap *regmap, int *val) +{ + int ret; + unsigned int status, state; + unsigned int acin_state; + + ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); + if (ret < 0) + return ret; + + ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); + if (ret < 0) + return ret; + + acin_state = (state & APCH_STATE_ACINSTAT) >> 1; + + state &= APCH_STATE_CSTATE; + state >>= APCH_STATE_CSTATE_SHIFT; + + switch (state) { + case APCH_STATE_CSTATE_PRE: + if (acin_state) { + if (charger->chgin_level) + *val = MAX_CURRENT_AC_HIGH_PRE; + else + *val = MAX_CURRENT_AC_LOW_PRE; + } else { + *val = MAX_CURRENT_USB_PRE; + } + break; + case APCH_STATE_CSTATE_FAST: + if (acin_state) { + if (charger->chgin_level) + *val = MAX_CURRENT_AC_HIGH; + else + *val = MAX_CURRENT_AC_LOW; + } else { + if (charger->chgin_level) + *val = MAX_CURRENT_USB_HIGH; + else + *val = MAX_CURRENT_USB_LOW; + } + break; + case APCH_STATE_CSTATE_EOC: + case APCH_STATE_CSTATE_DISABLED: + default: + *val = 0; + break; + } + + return 0; +} + static enum power_supply_property act8945a_charger_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_CAPACITY_LEVEL, + POWER_SUPPLY_PROP_CURRENT_MAX, POWER_SUPPLY_PROP_MODEL_NAME, POWER_SUPPLY_PROP_MANUFACTURER }; @@ -302,6 +370,10 @@ static int act8945a_charger_get_property(struct power_supply *psy, ret = act8945a_get_capacity_level(charger, regmap, &val->intval); break; + case POWER_SUPPLY_PROP_CURRENT_MAX: + ret = act8945a_get_current_max(charger, + regmap, &val->intval); + break; case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = act8945a_charger_model; break; @@ -434,8 +506,11 @@ static int act8945a_charger_config(struct device *dev, "active-semi,chglev-gpios", 0, &flags); if (gpio_is_valid(chglev_pin)) { - gpio_set_value(chglev_pin, - ((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1)); + if (!devm_gpio_request(dev, chglev_pin, "chglev-pin")) { + charger->chgin_level = + (flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1; + gpio_set_value(chglev_pin, charger->chgin_level); + } } if (of_property_read_u32(np,