From patchwork Tue Apr 30 06:45:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Smirnov X-Patchwork-Id: 10922857 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BFC4614C0 for ; Tue, 30 Apr 2019 06:46:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B04BB28990 for ; Tue, 30 Apr 2019 06:46:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A4AD428992; Tue, 30 Apr 2019 06:46:34 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,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 4E25828990 for ; Tue, 30 Apr 2019 06:46:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726379AbfD3GqQ (ORCPT ); Tue, 30 Apr 2019 02:46:16 -0400 Received: from mail-pf1-f195.google.com ([209.85.210.195]:44120 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725790AbfD3GqQ (ORCPT ); Tue, 30 Apr 2019 02:46:16 -0400 Received: by mail-pf1-f195.google.com with SMTP id y13so6569644pfm.11; Mon, 29 Apr 2019 23:46:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=2VW37A7CK8zNP+puxGj5PzGbX48/U7vlPhB5EcPFYbg=; b=LzgAvsZKBZJydg0akAdWWhNubSRDXtZ5Xf18tNdZ93yZXhW/hOZbBzEJRA9CggQxXU dayAf7HAjlIdKg3rpn5dfpDRSsjgYjBHxyRs74WhgIDaAuYDIeS7NPn0loDvfaqojWVt BArqqfEjJG94+QWz5vLzdHsSJN/5GHKhQV2I12YrCuT4mTsmab61/UVRqf641xeCale7 AvnJbrwDrFg1lbqBcOp6JGjefF7wxqWNbJ9IM+LFmNoFCozV/XFIoP+ZEJwp7xXdTXjt PCM/20bqff6uFq0cjKO3PGDgGNldE1jG53I0kKCHNtccOv8ENjWBfCt5hyBkqyhqTcQ4 joPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=2VW37A7CK8zNP+puxGj5PzGbX48/U7vlPhB5EcPFYbg=; b=C9gmgElqmQrmrcA8tAahyxpPmvzH2jX0fXL8jU/+ptA2OvMA3YceRdQjyeuwGF7eAR G1iuFseGwHYVkFjwMLi36yAYLAp9JjYNFHtMbxKurnHN0thiWVzAb4fmfT3qUkcRhVmz aPa5Gy3qXAIn1JszAV/f7SbLAFGf6q/cdYZvVGBvPcHlR7NDK0emWzz5SKyUxrQlp8/o FX80//41x45YYyyJhPF7Ft86zdPMfESuNplrIze4onVIc34qnrwtmiawDEzrwqodotop Kb7mWE+SbDp9jqIZE/HfZbOX5cv7w9+YSXx1Ki7Vgqf7x1Bs1uy5I6hEzXIfuTlUNQfd 7oCw== X-Gm-Message-State: APjAAAWbpeWWkN7XbILjlLHarkTV86DYIKLwbDSOCkBCpq8UMQsa9SH1 h5XgVFx1Uix3c50UJDDzn+ZXozvgfrQ= X-Google-Smtp-Source: APXvYqz+53uQ/abdHdtAJPhvBy84J+/ZS724ENQOjtBtIvvnyUlhJXj7xZymzA1uCeHlgZFwpogk7A== X-Received: by 2002:a63:610f:: with SMTP id v15mr27658139pgb.128.1556606774974; Mon, 29 Apr 2019 23:46:14 -0700 (PDT) Received: from squirtle.lan (c-24-22-235-96.hsd1.wa.comcast.net. [24.22.235.96]) by smtp.gmail.com with ESMTPSA id a9sm47336010pfo.17.2019.04.29.23.46.13 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 29 Apr 2019 23:46:14 -0700 (PDT) From: Andrey Smirnov To: linux-pm@vger.kernel.org Cc: Andrey Smirnov , Guenter Roeck , Enric Balletbo Serra , Chris Healy , Lucas Stach , Fabio Estevam , Sebastian Reichel , linux-kernel@vger.kernel.org Subject: [PATCH v4 1/3] power: supply: core: Add POWER_SUPPLY_HEALTH_OVERCURRENT constant Date: Mon, 29 Apr 2019 23:45:55 -0700 Message-Id: <20190430064557.28469-2-andrew.smirnov@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190430064557.28469-1-andrew.smirnov@gmail.com> References: <20190430064557.28469-1-andrew.smirnov@gmail.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 POWER_SUPPLY_HEALTH_OVERCURRENT constant in order to allow singalling overcurrent condition via power supply health information. Signed-off-by: Andrey Smirnov Reviewed-by: Guenter Roeck Cc: Enric Balletbo Serra Cc: Chris Healy Cc: Lucas Stach Cc: Fabio Estevam Cc: Guenter Roeck Cc: Sebastian Reichel Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org --- drivers/power/supply/power_supply_sysfs.c | 2 +- include/linux/power_supply.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c index 5358a80d854f..153f4a6ca57c 100644 --- a/drivers/power/supply/power_supply_sysfs.c +++ b/drivers/power/supply/power_supply_sysfs.c @@ -62,7 +62,7 @@ static const char * const power_supply_charge_type_text[] = { static const char * const power_supply_health_text[] = { "Unknown", "Good", "Overheat", "Dead", "Over voltage", "Unspecified failure", "Cold", "Watchdog timer expire", - "Safety timer expire" + "Safety timer expire", "Over current" }; static const char * const power_supply_technology_text[] = { diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h index 2f9c201a54d1..bdab14c7ca4d 100644 --- a/include/linux/power_supply.h +++ b/include/linux/power_supply.h @@ -57,6 +57,7 @@ enum { POWER_SUPPLY_HEALTH_COLD, POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE, POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE, + POWER_SUPPLY_HEALTH_OVERCURRENT, }; enum { From patchwork Tue Apr 30 06:45:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Andrey Smirnov X-Patchwork-Id: 10922855 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 59F3A912 for ; Tue, 30 Apr 2019 06:46:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 484EE28990 for ; Tue, 30 Apr 2019 06:46:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3C26F28992; Tue, 30 Apr 2019 06:46:32 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,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 E994A28990 for ; Tue, 30 Apr 2019 06:46:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726397AbfD3GqS (ORCPT ); Tue, 30 Apr 2019 02:46:18 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:37626 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726381AbfD3GqS (ORCPT ); Tue, 30 Apr 2019 02:46:18 -0400 Received: by mail-pg1-f193.google.com with SMTP id e6so6381626pgc.4; Mon, 29 Apr 2019 23:46:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=V6+r6fHMTPhud/w7Znz171mMvwEyrd7nrLxUu/2F1Sg=; b=gbom/L76Kc3xtT4f+nd6gNNtpx84qzozukVWzET7UuNKrINbeiaIl941rb58DVVsAw e5r/9EVNH/E4bAcZtKL6cel3KharnuY3+OpxlLcqOB06JlQ10ohMLNfAw8aRG6ZAvzus Z08ATCyXU308yvMI0NZB2UswfsNPsHg8q9N0zBqmMno1Ho3/Du3NWdU2VAteKB+LWdJ3 e71mSo8JyoZPltOUPxiZCxqHo/g3E+n2UGi2/yzM8UhIZCHi/1ZQ+5vvl5sxUJUzHsm/ HU8OxkSgOBwFfQhVHTdLqn7GpTdP3tVSwsHJJI4Q63JSKCJoR9YsbpEnRZfGBYSShoc4 QioQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=V6+r6fHMTPhud/w7Znz171mMvwEyrd7nrLxUu/2F1Sg=; b=DOW839ufIRdYLcb2cIWzHGdoA3wF3AEIAQzTwMEybt0emGFjWkkh4YX22Aa/qOliEO gytM34SkGpamHfNc3NOUSts18W8TPA3G/Yzh3HK3RNebInfse6kY/C6mr4It7R35Yo+X hDHankxFU/fkeok4Gc6ClxT94xyQcEobZaL7wWH6r8724sCSyX/cSQluRyNNxuFvTgrF APVhOK7PKCMqn1SwCKiP9wNZtYkwf8UGANayD6GogTPKTiscTjEMwmU/jK0CsRfnw6ls WfCQcba52w/yiFTcKS/7FG0j/NP4p5Q4s1fSxzjlIqMlYFAYTpVfmNxgsxEJmab9VAne FsZw== X-Gm-Message-State: APjAAAUN6ktwOe6KH3ACPKABO5QTVRnHo1kfP6EbG9StTvNnbgr0LD82 G/40GtIIiUUH7Ebo3jC/agW99rqFHIQ= X-Google-Smtp-Source: APXvYqx5YbZibNud+hNYR6ybeCQBSPQnbS4wuOG72hpnw53YwgoApj+p01fE/xXBv+R/L2q3SHHYOw== X-Received: by 2002:a63:d150:: with SMTP id c16mr10552114pgj.439.1556606776429; Mon, 29 Apr 2019 23:46:16 -0700 (PDT) Received: from squirtle.lan (c-24-22-235-96.hsd1.wa.comcast.net. [24.22.235.96]) by smtp.gmail.com with ESMTPSA id a9sm47336010pfo.17.2019.04.29.23.46.15 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 29 Apr 2019 23:46:15 -0700 (PDT) From: Andrey Smirnov To: linux-pm@vger.kernel.org Cc: Andrey Smirnov , Enric Balletbo Serra , Chris Healy , Lucas Stach , Fabio Estevam , Guenter Roeck , Sebastian Reichel , linux-kernel@vger.kernel.org Subject: [PATCH v4 2/3] power: supply: Add driver for Microchip UCS1002 Date: Mon, 29 Apr 2019 23:45:56 -0700 Message-Id: <20190430064557.28469-3-andrew.smirnov@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190430064557.28469-1-andrew.smirnov@gmail.com> References: <20190430064557.28469-1-andrew.smirnov@gmail.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 driver for Microchip UCS1002 Programmable USB Port Power Controller with Charger Emulation. The driver exposed a power supply device to control/monitor various parameter of the device as well as a regulator to allow controlling VBUS line. Signed-off-by: Enric Balletbo Serra Signed-off-by: Andrey Smirnov Cc: Chris Healy Cc: Lucas Stach Cc: Fabio Estevam Cc: Guenter Roeck Cc: Sebastian Reichel Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Reviewed-by: Guenter Roeck --- drivers/power/supply/Kconfig | 9 + drivers/power/supply/Makefile | 1 + drivers/power/supply/ucs1002_power.c | 646 +++++++++++++++++++++++++++ 3 files changed, 656 insertions(+) create mode 100644 drivers/power/supply/ucs1002_power.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index e901b9879e7e..c614c8a196f3 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -660,4 +660,13 @@ config FUEL_GAUGE_SC27XX Say Y here to enable support for fuel gauge with SC27XX PMIC chips. +config CHARGER_UCS1002 + tristate "Microchip UCS1002 USB Port Power Controller" + depends on I2C + depends on OF + select REGMAP_I2C + help + Say Y to enable support for Microchip UCS1002 Programmable + USB Port Power Controller with Charger Emulation. + endif # POWER_SUPPLY diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index b731c2a9b695..c56803a9e4fe 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -87,3 +87,4 @@ obj-$(CONFIG_AXP288_CHARGER) += axp288_charger.o obj-$(CONFIG_CHARGER_CROS_USBPD) += cros_usbpd-charger.o obj-$(CONFIG_CHARGER_SC2731) += sc2731_charger.o obj-$(CONFIG_FUEL_GAUGE_SC27XX) += sc27xx_fuel_gauge.o +obj-$(CONFIG_CHARGER_UCS1002) += ucs1002_power.o diff --git a/drivers/power/supply/ucs1002_power.c b/drivers/power/supply/ucs1002_power.c new file mode 100644 index 000000000000..d66b4eff9b7a --- /dev/null +++ b/drivers/power/supply/ucs1002_power.c @@ -0,0 +1,646 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for UCS1002 Programmable USB Port Power Controller + * + * Copyright (C) 2019 Zodiac Inflight Innovations + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* UCS1002 Registers */ +#define UCS1002_REG_CURRENT_MEASUREMENT 0x00 + +/* + * The Total Accumulated Charge registers store the total accumulated + * charge delivered from the VS source to a portable device. The total + * value is calculated using four registers, from 01h to 04h. The bit + * weighting of the registers is given in mA/hrs. + */ +#define UCS1002_REG_TOTAL_ACC_CHARGE 0x01 + +/* Other Status Register */ +#define UCS1002_REG_OTHER_STATUS 0x0f +# define F_ADET_PIN BIT(4) +# define F_CHG_ACT BIT(3) + +/* Interrupt Status */ +#define UCS1002_REG_INTERRUPT_STATUS 0x10 +# define F_DISCHARGE_ERR BIT(6) +# define F_RESET BIT(5) +# define F_MIN_KEEP_OUT BIT(4) +# define F_TSD BIT(3) +# define F_OVER_VOLT BIT(2) +# define F_BACK_VOLT BIT(1) +# define F_OVER_ILIM BIT(0) + +/* Pin Status Register */ +#define UCS1002_REG_PIN_STATUS 0x14 +# define UCS1002_PWR_STATE_MASK 0x03 +# define F_PWR_EN_PIN BIT(6) +# define F_M2_PIN BIT(5) +# define F_M1_PIN BIT(4) +# define F_EM_EN_PIN BIT(3) +# define F_SEL_PIN BIT(2) +# define F_ACTIVE_MODE_MASK GENMASK(5, 3) +# define F_ACTIVE_MODE_PASSTHROUGH F_M2_PIN +# define F_ACTIVE_MODE_DEDICATED F_EM_EN_PIN +# define F_ACTIVE_MODE_BC12_DCP (F_M2_PIN | F_EM_EN_PIN) +# define F_ACTIVE_MODE_BC12_SDP F_M1_PIN +# define F_ACTIVE_MODE_BC12_CDP (F_M1_PIN | F_M2_PIN | F_EM_EN_PIN) + +/* General Configuration Register */ +#define UCS1002_REG_GENERAL_CFG 0x15 +# define F_RATION_EN BIT(3) + +/* Emulation Configuration Register */ +#define UCS1002_REG_EMU_CFG 0x16 + +/* Switch Configuration Register */ +#define UCS1002_REG_SWITCH_CFG 0x17 +# define F_PIN_IGNORE BIT(7) +# define F_EM_EN_SET BIT(5) +# define F_M2_SET BIT(4) +# define F_M1_SET BIT(3) +# define F_S0_SET BIT(2) +# define F_PWR_EN_SET BIT(1) +# define F_LATCH_SET BIT(0) +# define V_SET_ACTIVE_MODE_MASK GENMASK(5, 3) +# define V_SET_ACTIVE_MODE_PASSTHROUGH F_M2_SET +# define V_SET_ACTIVE_MODE_DEDICATED F_EM_EN_SET +# define V_SET_ACTIVE_MODE_BC12_DCP (F_M2_SET | F_EM_EN_SET) +# define V_SET_ACTIVE_MODE_BC12_SDP F_M1_SET +# define V_SET_ACTIVE_MODE_BC12_CDP (F_M1_SET | F_M2_SET | F_EM_EN_SET) + +/* Current Limit Register */ +#define UCS1002_REG_ILIMIT 0x19 +# define UCS1002_ILIM_SW_MASK GENMASK(3, 0) + +/* Product ID */ +#define UCS1002_REG_PRODUCT_ID 0xfd +# define UCS1002_PRODUCT_ID 0x4e + +/* Manufacture name */ +#define UCS1002_MANUFACTURER "SMSC" + +struct ucs1002_info { + struct power_supply *charger; + struct i2c_client *client; + struct regmap *regmap; + struct regulator_desc *regulator_descriptor; + bool present; +}; + +static enum power_supply_property ucs1002_props[] = { + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_CHARGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CURRENT_MAX, + POWER_SUPPLY_PROP_PRESENT, /* the presence of PED */ + POWER_SUPPLY_PROP_MANUFACTURER, + POWER_SUPPLY_PROP_USB_TYPE, + POWER_SUPPLY_PROP_HEALTH, +}; + +static int ucs1002_get_online(struct ucs1002_info *info, + union power_supply_propval *val) +{ + unsigned int reg; + int ret; + + ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®); + if (ret) + return ret; + + val->intval = !!(reg & F_CHG_ACT); + + return 0; +} + +static int ucs1002_get_charge(struct ucs1002_info *info, + union power_supply_propval *val) +{ + /* + * To fit within 32 bits some values are rounded (uA/h) + * + * For Total Accumulated Charge Middle Low Byte register, addr + * 03h, byte 2 + * + * B0: 0.01084 mA/h rounded to 11 uA/h + * B1: 0.02169 mA/h rounded to 22 uA/h + * B2: 0.04340 mA/h rounded to 43 uA/h + * B3: 0.08676 mA/h rounded to 87 uA/h + * B4: 0.17350 mA/h rounded to 173 uÁ/h + * + * For Total Accumulated Charge Low Byte register, addr 04h, + * byte 3 + * + * B6: 0.00271 mA/h rounded to 3 uA/h + * B7: 0.005422 mA/h rounded to 5 uA/h + */ + static const int bit_weights_uAh[BITS_PER_TYPE(u32)] = { + /* + * Bit corresponding to low byte (offset 0x04) + * B0 B1 B2 B3 B4 B5 B6 B7 + */ + 0, 0, 0, 0, 0, 0, 3, 5, + /* + * Bit corresponding to middle low byte (offset 0x03) + * B0 B1 B2 B3 B4 B5 B6 B7 + */ + 11, 22, 43, 87, 173, 347, 694, 1388, + /* + * Bit corresponding to middle high byte (offset 0x02) + * B0 B1 B2 B3 B4 B5 B6 B7 + */ + 2776, 5552, 11105, 22210, 44420, 88840, 177700, 355400, + /* + * Bit corresponding to high byte (offset 0x01) + * B0 B1 B2 B3 B4 B5 B6 B7 + */ + 710700, 1421000, 2843000, 5685000, 11371000, 22742000, + 45484000, 90968000, + }; + unsigned long total_acc_charger; + unsigned int reg; + int i, ret; + + ret = regmap_bulk_read(info->regmap, UCS1002_REG_TOTAL_ACC_CHARGE, + ®, sizeof(u32)); + if (ret) + return ret; + + total_acc_charger = be32_to_cpu(reg); /* BE as per offsets above */ + val->intval = 0; + + for_each_set_bit(i, &total_acc_charger, ARRAY_SIZE(bit_weights_uAh)) + val->intval += bit_weights_uAh[i]; + + return 0; +} + +static int ucs1002_get_current(struct ucs1002_info *info, + union power_supply_propval *val) +{ + /* + * The Current Measurement register stores the measured + * current value delivered to the portable device. The range + * is from 9.76 mA to 2.5 A. + */ + static const int bit_weights_uA[BITS_PER_TYPE(u8)] = { + 9760, 19500, 39000, 78100, 156200, 312300, 624600, 1249300, + }; + unsigned long current_measurement; + unsigned int reg; + int i, ret; + + ret = regmap_read(info->regmap, UCS1002_REG_CURRENT_MEASUREMENT, ®); + if (ret) + return ret; + + current_measurement = reg; + val->intval = 0; + + for_each_set_bit(i, ¤t_measurement, ARRAY_SIZE(bit_weights_uA)) + val->intval += bit_weights_uA[i]; + + return 0; +} + +/* + * The Current Limit register stores the maximum current used by the + * port switch. The range is from 500mA to 2.5 A. + */ +static const u32 ucs1002_current_limit_uA[] = { + 500000, 900000, 1000000, 1200000, 1500000, 1800000, 2000000, 2500000, +}; + +static int ucs1002_get_max_current(struct ucs1002_info *info, + union power_supply_propval *val) +{ + unsigned int reg; + int ret; + + ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®); + if (ret) + return ret; + + val->intval = ucs1002_current_limit_uA[reg & UCS1002_ILIM_SW_MASK]; + + return 0; +} + +static int ucs1002_set_max_current(struct ucs1002_info *info, u32 val) +{ + unsigned int reg; + int ret, idx; + + for (idx = 0; idx < ARRAY_SIZE(ucs1002_current_limit_uA); idx++) { + if (val == ucs1002_current_limit_uA[idx]) + break; + } + + if (idx == ARRAY_SIZE(ucs1002_current_limit_uA)) + return -EINVAL; + + ret = regmap_write(info->regmap, UCS1002_REG_ILIMIT, idx); + if (ret) + return ret; + /* + * Any current limit setting exceeding the one set via ILIM + * pin will be rejected, so we read out freshly changed limit + * to make sure that it took effect. + */ + ret = regmap_read(info->regmap, UCS1002_REG_ILIMIT, ®); + if (ret) + return ret; + + if (reg != idx) + return -EINVAL; + + return 0; +} + +static enum power_supply_usb_type ucs1002_usb_types[] = { + POWER_SUPPLY_USB_TYPE_PD, + POWER_SUPPLY_USB_TYPE_SDP, + POWER_SUPPLY_USB_TYPE_DCP, + POWER_SUPPLY_USB_TYPE_CDP, + POWER_SUPPLY_USB_TYPE_UNKNOWN, +}; + +static int ucs1002_set_usb_type(struct ucs1002_info *info, int val) +{ + unsigned int mode; + + if (val < 0 || val >= ARRAY_SIZE(ucs1002_usb_types)) + return -EINVAL; + + switch (ucs1002_usb_types[val]) { + case POWER_SUPPLY_USB_TYPE_PD: + mode = V_SET_ACTIVE_MODE_DEDICATED; + break; + case POWER_SUPPLY_USB_TYPE_SDP: + mode = V_SET_ACTIVE_MODE_BC12_SDP; + break; + case POWER_SUPPLY_USB_TYPE_DCP: + mode = V_SET_ACTIVE_MODE_BC12_DCP; + break; + case POWER_SUPPLY_USB_TYPE_CDP: + mode = V_SET_ACTIVE_MODE_BC12_CDP; + break; + default: + return -EINVAL; + } + + return regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG, + V_SET_ACTIVE_MODE_MASK, mode); +} + +static int ucs1002_get_usb_type(struct ucs1002_info *info, + union power_supply_propval *val) +{ + enum power_supply_usb_type type; + unsigned int reg; + int ret; + + ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®); + if (ret) + return ret; + + switch (reg & F_ACTIVE_MODE_MASK) { + default: + type = POWER_SUPPLY_USB_TYPE_UNKNOWN; + break; + case F_ACTIVE_MODE_DEDICATED: + type = POWER_SUPPLY_USB_TYPE_PD; + break; + case F_ACTIVE_MODE_BC12_SDP: + type = POWER_SUPPLY_USB_TYPE_SDP; + break; + case F_ACTIVE_MODE_BC12_DCP: + type = POWER_SUPPLY_USB_TYPE_DCP; + break; + case F_ACTIVE_MODE_BC12_CDP: + type = POWER_SUPPLY_USB_TYPE_CDP; + break; + }; + + val->intval = type; + + return 0; +} + +static int ucs1002_get_health(struct ucs1002_info *info, + union power_supply_propval *val) +{ + unsigned int reg; + int ret, health; + + ret = regmap_read(info->regmap, UCS1002_REG_INTERRUPT_STATUS, ®); + if (ret) + return ret; + + if (reg & F_TSD) + health = POWER_SUPPLY_HEALTH_OVERHEAT; + else if (reg & (F_OVER_VOLT | F_BACK_VOLT)) + health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; + else if (reg & F_OVER_ILIM) + health = POWER_SUPPLY_HEALTH_OVERCURRENT; + else if (reg & (F_DISCHARGE_ERR | F_MIN_KEEP_OUT)) + health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; + else + health = POWER_SUPPLY_HEALTH_GOOD; + + val->intval = health; + + return 0; +} + +static int ucs1002_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct ucs1002_info *info = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + return ucs1002_get_online(info, val); + case POWER_SUPPLY_PROP_CHARGE_NOW: + return ucs1002_get_charge(info, val); + case POWER_SUPPLY_PROP_CURRENT_NOW: + return ucs1002_get_current(info, val); + case POWER_SUPPLY_PROP_CURRENT_MAX: + return ucs1002_get_max_current(info, val); + case POWER_SUPPLY_PROP_USB_TYPE: + return ucs1002_get_usb_type(info, val); + case POWER_SUPPLY_PROP_HEALTH: + return ucs1002_get_health(info, val); + case POWER_SUPPLY_PROP_PRESENT: + val->intval = info->present; + return 0; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = UCS1002_MANUFACTURER; + return 0; + default: + return -EINVAL; + } +} + +static int ucs1002_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct ucs1002_info *info = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_CURRENT_MAX: + return ucs1002_set_max_current(info, val->intval); + case POWER_SUPPLY_PROP_USB_TYPE: + return ucs1002_set_usb_type(info, val->intval); + default: + return -EINVAL; + } +} + +static int ucs1002_property_is_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_CURRENT_MAX: + case POWER_SUPPLY_PROP_USB_TYPE: + return true; + default: + return false; + } +} + +static const struct power_supply_desc ucs1002_charger_desc = { + .name = "ucs1002", + .type = POWER_SUPPLY_TYPE_USB, + .usb_types = ucs1002_usb_types, + .num_usb_types = ARRAY_SIZE(ucs1002_usb_types), + .get_property = ucs1002_get_property, + .set_property = ucs1002_set_property, + .property_is_writeable = ucs1002_property_is_writeable, + .properties = ucs1002_props, + .num_properties = ARRAY_SIZE(ucs1002_props), +}; + +static irqreturn_t ucs1002_charger_irq(int irq, void *data) +{ + int ret, regval; + bool present; + struct ucs1002_info *info = data; + + present = info->present; + + ret = regmap_read(info->regmap, UCS1002_REG_OTHER_STATUS, ®val); + if (ret) + return IRQ_HANDLED; + + /* update attached status */ + info->present = regval & F_ADET_PIN; + + /* notify the change */ + if (present != info->present) + power_supply_changed(info->charger); + + return IRQ_HANDLED; +} + +static irqreturn_t ucs1002_alert_irq(int irq, void *data) +{ + struct ucs1002_info *info = data; + + power_supply_changed(info->charger); + + return IRQ_HANDLED; +} + +static const struct regulator_ops ucs1002_regulator_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, +}; + +static const struct regulator_desc ucs1002_regulator_descriptor = { + .name = "ucs1002-vbus", + .ops = &ucs1002_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .enable_reg = UCS1002_REG_SWITCH_CFG, + .enable_mask = F_PWR_EN_SET, + .enable_val = F_PWR_EN_SET, + .fixed_uV = 5000000, + .n_voltages = 1, +}; + +static int ucs1002_probe(struct i2c_client *client, + const struct i2c_device_id *dev_id) +{ + struct device *dev = &client->dev; + struct power_supply_config charger_config = {}; + const struct regmap_config regmap_config = { + .reg_bits = 8, + .val_bits = 8, + }; + struct regulator_config regulator_config = {}; + int irq_a_det, irq_alert, ret; + struct regulator_dev *rdev; + struct ucs1002_info *info; + unsigned int regval; + + info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->regmap = devm_regmap_init_i2c(client, ®map_config); + ret = PTR_ERR_OR_ZERO(info->charger); + if (ret) { + dev_err(dev, "Regmap initialization failed: %d\n", ret); + return ret; + } + + info->client = client; + + irq_a_det = of_irq_get_byname(dev->of_node, "a_det"); + irq_alert = of_irq_get_byname(dev->of_node, "alert"); + + charger_config.of_node = dev->of_node; + charger_config.drv_data = info; + + ret = regmap_read(info->regmap, UCS1002_REG_PRODUCT_ID, ®val); + if (ret) { + dev_err(dev, "Failed to read product ID: %d\n", ret); + return ret; + } + + if (regval != UCS1002_PRODUCT_ID) { + dev_err(dev, + "Product ID does not match (0x%02x != 0x%02x)\n", + regval, UCS1002_PRODUCT_ID); + return -ENODEV; + } + + /* Enable charge rationing by default */ + ret = regmap_update_bits(info->regmap, UCS1002_REG_GENERAL_CFG, + F_RATION_EN, F_RATION_EN); + if (ret) { + dev_err(dev, "Failed to read general config: %d\n", ret); + return ret; + } + + /* + * Ignore the M1, M2, PWR_EN, and EM_EN pin states. Set active + * mode selection to BC1.2 CDP. + */ + ret = regmap_update_bits(info->regmap, UCS1002_REG_SWITCH_CFG, + V_SET_ACTIVE_MODE_MASK | F_PIN_IGNORE, + V_SET_ACTIVE_MODE_BC12_CDP | F_PIN_IGNORE); + if (ret) { + dev_err(dev, "Failed to configure default mode: %d\n", ret); + return ret; + } + /* + * Be safe and set initial current limit to 500mA + */ + ret = ucs1002_set_max_current(info, 500000); + if (ret) { + dev_err(dev, "Failed to set max current default: %d\n", ret); + return ret; + } + + info->charger = devm_power_supply_register(dev, &ucs1002_charger_desc, + &charger_config); + ret = PTR_ERR_OR_ZERO(info->charger); + if (ret) { + dev_err(dev, "Failed to register power supply: %d\n", ret); + return ret; + } + + ret = regmap_read(info->regmap, UCS1002_REG_PIN_STATUS, ®val); + if (ret) { + dev_err(dev, "Failed to read pin status: %d\n", ret); + return ret; + } + + info->regulator_descriptor = + devm_kmemdup(dev, &ucs1002_regulator_descriptor, + sizeof(ucs1002_regulator_descriptor), + GFP_KERNEL); + if (!info->regulator_descriptor) + return -ENOMEM; + + info->regulator_descriptor->enable_is_inverted = !(regval & F_SEL_PIN); + + regulator_config.dev = dev; + regulator_config.of_node = dev->of_node; + regulator_config.regmap = info->regmap; + + rdev = devm_regulator_register(dev, info->regulator_descriptor, + ®ulator_config); + ret = PTR_ERR_OR_ZERO(info->charger); + if (ret) { + dev_err(dev, "Failed to register VBUS regulator: %d\n", ret); + return ret; + } + + if (irq_a_det > 0) { + ret = devm_request_threaded_irq(dev, irq_a_det, NULL, + ucs1002_charger_irq, + IRQF_ONESHOT, + "ucs1002-a_det", info); + if (ret) { + dev_err(dev, "Failed to request A_DET threaded irq: %d\n", + ret); + return ret; + } + } + + if (irq_alert > 0) { + ret = devm_request_threaded_irq(dev, irq_alert, NULL, + ucs1002_alert_irq, + IRQF_ONESHOT, + "ucs1002-alert", info); + if (ret) { + dev_err(dev, "Failed to request ALERT threaded irq: %d\n", + ret); + return ret; + } + } + + return 0; +} + +static const struct of_device_id ucs1002_of_match[] = { + { .compatible = "microchip,ucs1002", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ucs1002_of_match); + +static struct i2c_driver ucs1002_driver = { + .driver = { + .name = "ucs1002", + .of_match_table = ucs1002_of_match, + }, + .probe = ucs1002_probe, +}; +module_i2c_driver(ucs1002_driver); + +MODULE_DESCRIPTION("Microchip UCS1002 Programmable USB Port Power Controller"); +MODULE_AUTHOR("Enric Balletbo Serra "); +MODULE_AUTHOR("Andrey Smirnov "); +MODULE_LICENSE("GPL"); From patchwork Tue Apr 30 06:45:57 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Smirnov X-Patchwork-Id: 10922853 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 77568912 for ; Tue, 30 Apr 2019 06:46:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6749F28990 for ; Tue, 30 Apr 2019 06:46:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5BA1D28992; 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[24.22.235.96]) by smtp.gmail.com with ESMTPSA id a9sm47336010pfo.17.2019.04.29.23.46.16 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 29 Apr 2019 23:46:16 -0700 (PDT) From: Andrey Smirnov To: linux-pm@vger.kernel.org Cc: Andrey Smirnov , Enric Balletbo Serra , Chris Healy , Lucas Stach , Fabio Estevam , Guenter Roeck , Rob Herring , devicetree@vger.kernel.org, Sebastian Reichel , linux-kernel@vger.kernel.org Subject: [PATCH v4 3/3] dt-bindings: power: supply: Add bindings for Microchip UCS1002 Date: Mon, 29 Apr 2019 23:45:57 -0700 Message-Id: <20190430064557.28469-4-andrew.smirnov@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190430064557.28469-1-andrew.smirnov@gmail.com> References: <20190430064557.28469-1-andrew.smirnov@gmail.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 bindings for Microchip UCS1002 Programmable USB Port Power Controller with Charger Emulation. Signed-off-by: Andrey Smirnov Cc: Enric Balletbo Serra Cc: Chris Healy Cc: Lucas Stach Cc: Fabio Estevam Cc: Guenter Roeck Cc: Rob Herring Cc: devicetree@vger.kernel.org Cc: Sebastian Reichel Cc: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org Reviewed-by: Rob Herring --- .../power/supply/microchip,ucs1002.txt | 27 +++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/microchip,ucs1002.txt diff --git a/Documentation/devicetree/bindings/power/supply/microchip,ucs1002.txt b/Documentation/devicetree/bindings/power/supply/microchip,ucs1002.txt new file mode 100644 index 000000000000..021fd7aba75e --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/microchip,ucs1002.txt @@ -0,0 +1,27 @@ +Microchip UCS1002 USB Port Power Controller + +Required properties: +- compatible : Should be "microchip,ucs1002"; +- reg : I2C slave address + +Optional properties: +- interrupts-extended : A list of interrupts lines present (could be either + corresponding to A_DET# pin, ALERT# pin, or both) +- interrupt-names : A list of interrupt names. Should contain (if + present): + - "a_det" for line connected to A_DET# pin + - "alert" for line connected to ALERT# pin + Both are expected to be IRQ_TYPE_EDGE_BOTH +Example: + +&i2c3 { + charger@32 { + compatible = "microchip,ucs1002"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_ucs1002_pins>; + reg = <0x32>; + interrupts-extended = <&gpio5 2 IRQ_TYPE_EDGE_BOTH>, + <&gpio3 21 IRQ_TYPE_EDGE_BOTH>; + interrupt-names = "a_det", "alert"; + }; +};