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[2620:137:e000::1:20]) by mx.google.com with ESMTP id gs8-20020a1709072d0800b007825337afeesi18769550ejc.273.2022.10.20.00.16.32; Thu, 20 Oct 2022 00:17:04 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=F3cXE7TK; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230349AbiJTHQL (ORCPT + 99 others); Thu, 20 Oct 2022 03:16:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36064 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230345AbiJTHPx (ORCPT ); Thu, 20 Oct 2022 03:15:53 -0400 Received: from mail-pg1-x52a.google.com (mail-pg1-x52a.google.com [IPv6:2607:f8b0:4864:20::52a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8FC86157F56; Thu, 20 Oct 2022 00:15:19 -0700 (PDT) Received: by mail-pg1-x52a.google.com with SMTP id u71so18462204pgd.2; Thu, 20 Oct 2022 00:15:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=DJg3vkvL6mAQwIfI1Is4t7HAoGmIXrff5qn+0C2h0VA=; b=F3cXE7TKYCnQ4DYQVQ0V/K/TdvmV20wqnacqxzWZgxKePp+eBisnW/DmerLNdp6B0T fMfIwGr3wTiSBNQb50oZ42ko4YQrNIbHObY3gqQVhpWrhvdd6snGNewe38R9mj+4ZE1h 2HHYAmT2bXNKQJ3ASTfEadCah9/jVN3aw8DtxsTGORXRG7fP2pLHApxgbwuzqN+Op9VE +jDQQbhIzvcb0iMxUV5/POjCaRwkKrhp0/t3kel9pfE6p66PwwTkQyDOnLWRoGT/Xu0w R9TLvOJH3brmuIsmle8/XLmYyGZMluF43irYuKRshiBspsvKln9t9SplVt94xpyqgTud Mc8g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=DJg3vkvL6mAQwIfI1Is4t7HAoGmIXrff5qn+0C2h0VA=; b=5ivlmVdYn5ooDOap17PL4w2yWzvXDWiEcnAGdtgim8rc8QNvp8PVN7d6F0OP5LbmAO aQul6vlDknAx4TAQIauh7nPHgwa3Vz/rRS5qwfobwusCM2Gxefxs+Y2ZHKUuBs6prkOX YcYItelLOFyFIEzv6tmOiJwQ+p+simzi9TTqHTOzSNGBcjrKAx3d6XJtE7FI4AUXTB6j r093kbCkGZ0Uk2rvZiOlCuwKYwSJsvMu0oe4ikyBHlLTqqhY56e/pX4O0cb2jO3nZOsB VqCl089p7F85AlDaDpeUt1wE8paPBrb9BwC9FZz7oRGIQIRlE49wrPB4Sp3wwNUcNvza QKvg== X-Gm-Message-State: ACrzQf2SjhyJDOq+tl2X/6E80S4Sou+Zk1ETHMzgIaFe8KKvI9qHjd4V yOr/DAjXWHvfQBZnlp6fmJc= X-Received: by 2002:a65:6b8e:0:b0:44f:ec0f:f684 with SMTP id d14-20020a656b8e000000b0044fec0ff684mr10248386pgw.25.1666250072043; Thu, 20 Oct 2022 00:14:32 -0700 (PDT) Received: from localhost.localdomain ([2402:7500:569:a12c:444a:ed28:4831:fc95]) by smtp.gmail.com with ESMTPSA id m8-20020a170902db0800b0018157b415dbsm12094679plx.63.2022.10.20.00.14.28 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 20 Oct 2022 00:14:31 -0700 (PDT) From: cy_huang To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, sre@kernel.org Cc: cy_huang@richtek.com, allen_chiang@richtek.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] dt-bindings: power: supply: Add Richtek RT9759 smart cap divider charger Date: Thu, 20 Oct 2022 15:14:19 +0800 Message-Id: <1666250061-18686-2-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1666250061-18686-1-git-send-email-u0084500@gmail.com> References: <1666250061-18686-1-git-send-email-u0084500@gmail.com> X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747189995730477109?= X-GMAIL-MSGID: =?utf-8?q?1747189995730477109?= From: ChiYuan Huang Add bindings for the Richtek RT9759 smart cap divider charger. Signed-off-by: ChiYuan Huang Reviewed-by: Rob Herring --- .../bindings/power/supply/richtek,rt9759.yaml | 61 ++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/richtek,rt9759.yaml diff --git a/Documentation/devicetree/bindings/power/supply/richtek,rt9759.yaml b/Documentation/devicetree/bindings/power/supply/richtek,rt9759.yaml new file mode 100644 index 00000000..04fc6b0 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/richtek,rt9759.yaml @@ -0,0 +1,61 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/supply/richtek,rt9759.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Richtek RT9759 Smart Cap Divider Charger + +maintainers: + - ChiYuan Huang + +description: | + The RT9759 is a high efficiency and high charge current charger. + The efficiency is up to 97.8% when VBAT = 4.2V, IBAT = 2.5A and the maximum + charge current is up to 8A. The device integrates smart cap divider topology + with dual phase charge pump core. The ADCs provide input and output voltage, + current and temperature information to monitor the whole charging process. + + Datasheet is available at + https://www.richtek.com/assets/product_file/RT9759/DS9759-02.pdf + +properties: + compatible: + enum: + - richtek,rt9759 + + reg: + maxItems: 1 + + wakeup-source: true + + interrupts: + maxItems: 1 + + shunt-resistor-micro-ohms: + description: Battery current sense resistor mounted. + default: 2000 + +required: + - compatible + - reg + - wakeup-source + - interrupts + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + charger@66 { + compatible = "richtek,rt9759"; + reg = <0x66>; + wakeup-source; + interrupts-extended = <&gpio_intc 32 IRQ_TYPE_EDGE_FALLING>; + shunt-resistor-micro-ohms = <5000>; + }; + }; From patchwork Thu Oct 20 07:14:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ChiYuan Huang X-Patchwork-Id: 5995 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:4ac7:0:0:0:0:0 with SMTP id y7csp109927wrs; Thu, 20 Oct 2022 00:17:44 -0700 (PDT) X-Google-Smtp-Source: AMsMyM78gmHbL3OtI1SrKhxOq60D2azMzY36CPAWevQeaEyhu8fPK3aygM6uhhb+nEs2X690GOu1 X-Received: by 2002:a17:906:4795:b0:794:8b93:2e43 with SMTP id cw21-20020a170906479500b007948b932e43mr4397554ejc.184.1666250264698; Thu, 20 Oct 2022 00:17:44 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1666250264; cv=none; d=google.com; s=arc-20160816; b=FYEIk5K0PfSqUZkML5Efqx0fWPpdTbMYeK9g/aQzCiC7Nj4zCKv0Oi9vQrUwSCYlod hZlN6pd/bIA+27J3DfXXjeCk0EioYI6uIQ3JGJa2UpNXp/7KpOBkTagUFWdTwhGB7yY8 v3YIh/CCm1NdwJnWWfie7BgQT046fUGaBGJlIx3wRZWVf7PgW9DoS3nusj5/OLMRqi2X bOhQ4hpMRkzNcPePTIwTfLDW+yvcM2SbYNhgv23m9ssMoZhmrmignWFxK4KiYH6gwcTL 5XHAmdM2E2YHPQioQCrS1Ysl2fauz/Txn/ZWf6dYBgERGzevZanxdjwhbAQxDcM6Wk5s Zi0w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:references:in-reply-to:message-id:date:subject :cc:to:from:dkim-signature; bh=Sm2z1ndGFdss1E/5eaCR7bPzKOeKqFx824FfDN5LIXg=; b=ddUPzZBPqXW+REkfevQ9SMKqSs+8m3kwnOnfVJb7tjZIdx92rAF7L0QcIlWyyTRaqN tS5YhVk0zjVu+a1rSecTHtgDkNCtYhXEshGvnC/X+uV7cu69PKQkUtslUyEFwCKiSoJe ORyd23DSLvKBMljZjOVScpLJL8ZWl9xFpfkQst2xDskgSZROmiKdfbUStGn2pFQ4LuHv 7n7NrSQou2Tq6SJQB9DPdr8RY7zPUxFbF5BiDOZ9DQ399BmQqQ6l2ZONYvMCB2h+DuUg b25NWeIcjs6qIzXv9kUQmuNbM02Py7qbbg/L1OPZn1/xtMMHjOEOXfnk1UdrLEQrK5de 8Ydw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=PkCGhNBr; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (out1.vger.email. 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The RT9759 is a high efficiency and high charge current charger. The maximum charge current is up to 8A. It integrates a dual-phase charge pump core with ADC monitoring. Co-developed-by: Allen Chiang Signed-off-by: Allen Chiang Signed-off-by: ChiYuan Huang --- drivers/power/supply/Kconfig | 15 ++ drivers/power/supply/Makefile | 1 + drivers/power/supply/rt9759.c | 611 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 627 insertions(+) create mode 100644 drivers/power/supply/rt9759.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 0bbfe6a..2f24f29 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -785,6 +785,21 @@ config BATTERY_RT5033 The fuelgauge calculates and determines the battery state of charge according to battery open circuit voltage. +config CHARGER_RT9759 + tristate "Richtek RT9759 smart cap divider charger driver" + depends on I2C + select REGMAP_I2C + select LINEAR_RANGES + help + This adds support for Richtek RT9759 smart cap divider charger driver. + It's a high efficiency and high charge current charger. the device + integrates smart cap divider topology with 9-channel high speed + ADCs that can provide input and output voltage, current and + temperature monitoring. + + This driver can also be built as a module. If so, the module will be + called rt9759. + config CHARGER_RT9455 tristate "Richtek RT9455 battery charger driver" depends on I2C diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 0ee8653..b872c06 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -56,6 +56,7 @@ obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o obj-$(CONFIG_BATTERY_MAX1721X) += max1721x_battery.o obj-$(CONFIG_BATTERY_Z2) += z2_battery.o obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o +obj-$(CONFIG_CHARGER_RT9759) += rt9759.o obj-$(CONFIG_CHARGER_RT9455) += rt9455_charger.o obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o diff --git a/drivers/power/supply/rt9759.c b/drivers/power/supply/rt9759.c new file mode 100644 index 00000000..95f2142f --- /dev/null +++ b/drivers/power/supply/rt9759.c @@ -0,0 +1,611 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2022 Richtek Technology Corp. + * + * Authors: Allen Chiang + * ChiYuan Huang + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RT9759_REG_VBATOVP 0x00 +#define RT9759_REG_IBATOCP 0x02 +#define RT9759_REG_VBUSOVP 0x06 +#define RT9759_REG_IBUSOCPUCP 0x08 +#define RT9759_REG_CONVST 0x0A +#define RT9759_REG_CHGCTL0 0x0B +#define RT9759_REG_CHGCTL1 0x0C +#define RT9759_REG_FLTFLAG 0x11 +#define RT9759_REG_DEVINFO 0x13 +#define RT9759_REG_ADCCTL 0x14 +#define RT9759_REG_IBUSADC 0x16 +#define RT9759_REG_REGCTL 0x2B +#define RT9759_REG_OTHER4 0x33 + +#define RT9759_VBUSUCP_MASK BIT(4) +#define RT9759_TDIEOTP_MASK BIT(7) +#define RT9759_WDT_MASK BIT(3) +#define RT9759_BUSBATOVP_MASK (BIT(7) | BIT(5)) +#define RT9759_BUSBATOCP_MASK (BIT(6) | BIT(4)) +#define RT9759_ADCEN_MASK BIT(7) +#define RT9759_ADCONCE_MASK BIT(6) + +#define RT9759_DEVID 0x08 +#define RT9759_ADC_CONVTIME 2000 +#define RT9759_ADC_MAXWAIT 16000 + +enum rt9759_adc_chan { + ADC_IBUS = 0, + ADC_VBUS, + ADC_VAC, + ADC_VOUT, + ADC_VBAT, + ADC_IBAT, + ADC_TSBUS, + ADC_TSBAT, + ADC_TDIE, + ADC_MAX_CHANNEL +}; + +enum rt9759_fields { + F_VBATOVP = 0, + F_IBATOCP, + F_VBUSOVP, + F_IBUSOCP, + F_SWITCHING, + F_REG_RST, + F_WDT_DIS, + F_WDT_TMR, + F_CHG_EN, + F_DEV_ID, + F_ADC_EN, + F_IBAT_RSEN, + F_MAX_FIELD +}; + +enum rt9759_ranges { + R_VBATOVP = 0, + R_IBATOCP, + R_VACOVP, + R_VBUSOVP, + R_IBUSOCP, + R_MAX_RANGE +}; + +static const struct reg_field rt9759_chg_fields[F_MAX_FIELD] = { + [F_VBATOVP] = REG_FIELD(RT9759_REG_VBATOVP, 0, 5), + [F_IBATOCP] = REG_FIELD(RT9759_REG_IBATOCP, 0, 6), + [F_VBUSOVP] = REG_FIELD(RT9759_REG_VBUSOVP, 0, 6), + [F_IBUSOCP] = REG_FIELD(RT9759_REG_IBUSOCPUCP, 0, 3), + [F_SWITCHING] = REG_FIELD(RT9759_REG_CONVST, 2, 2), + [F_REG_RST] = REG_FIELD(RT9759_REG_CHGCTL0, 7, 7), + [F_WDT_DIS] = REG_FIELD(RT9759_REG_CHGCTL0, 2, 2), + [F_WDT_TMR] = REG_FIELD(RT9759_REG_CHGCTL0, 0, 1), + [F_CHG_EN] = REG_FIELD(RT9759_REG_CHGCTL1, 7, 7), + [F_DEV_ID] = REG_FIELD(RT9759_REG_DEVINFO, 0, 3), + [F_ADC_EN] = REG_FIELD(RT9759_REG_ADCCTL, 7, 7), + [F_IBAT_RSEN] = REG_FIELD(RT9759_REG_REGCTL, 1, 1), +}; + +/* All converted to microvolt or microamp */ +static const struct linear_range rt9759_chg_ranges[R_MAX_RANGE] = { + LINEAR_RANGE_IDX(R_VBATOVP, 3500000, 0, 63, 25000), + LINEAR_RANGE_IDX(R_IBATOCP, 2000000, 0, 80, 100000), + LINEAR_RANGE_IDX(R_VBUSOVP, 6000000, 0, 127, 50000), + LINEAR_RANGE_IDX(R_IBUSOCP, 1000000, 0, 15, 250000), +}; + +struct charger_event { + unsigned int ucp_flag; + unsigned int conv_flag; + unsigned int wdt_flag; + unsigned int flt_flag; +}; + +struct rt9759_data { + struct device *dev; + struct regmap *regmap; + struct regmap_field *rm_fields[F_MAX_FIELD]; + struct power_supply *psy; + struct mutex adc_lock; + struct power_supply_desc psy_desc; + struct charger_event chg_evt; + unsigned int rg_resistor; + unsigned int real_resistor; +}; + +static int rt9759_get_value_by_field_range(struct rt9759_data *data, + enum rt9759_fields field, + enum rt9759_ranges rsel, int *val) +{ + const struct linear_range *range = rt9759_chg_ranges + rsel; + unsigned int sel; + int ret; + + ret = regmap_field_read(data->rm_fields[field], &sel); + if (ret) + return ret; + + return linear_range_get_value(range, sel, val); +} + +static int rt9759_set_value_by_field_range(struct rt9759_data *data, + enum rt9759_fields field, + enum rt9759_ranges rsel, int val) +{ + const struct linear_range *range = rt9759_chg_ranges + rsel; + unsigned int sel; + + linear_range_get_selector_within(range, val, &sel); + return regmap_field_write(data->rm_fields[field], sel); +} + +static int rt9759_get_adc(struct rt9759_data *data, enum rt9759_adc_chan chan, + int *val) +{ + struct regmap *regmap = data->regmap; + unsigned int reg_addr = RT9759_REG_IBUSADC + chan * 2; + unsigned int mask = RT9759_ADCEN_MASK | RT9759_ADCONCE_MASK; + unsigned int adc_cntl; + __be16 raws; + int scale, ret; + + mutex_lock(&data->adc_lock); + + ret = regmap_update_bits(regmap, RT9759_REG_ADCCTL, mask, mask); + if (ret) + goto adc_unlock; + + ret = regmap_read_poll_timeout(regmap, RT9759_REG_ADCCTL, adc_cntl, + !(adc_cntl & RT9759_ADCEN_MASK), + RT9759_ADC_CONVTIME, RT9759_ADC_MAXWAIT); + if (ret && ret != -ETIMEDOUT) + goto adc_unlock; + + ret = regmap_raw_read(regmap, reg_addr, &raws, sizeof(raws)); + if (ret) + goto adc_unlock; + + /* + * TDIE LSB 0.5'c, others LSB 1000uV or 1000uA. + * Rsense ratio is needed for IBAT channel + */ + if (chan == ADC_TDIE) + scale = 5; + else if (chan == ADC_IBAT) + scale = 1000 * data->rg_resistor / data->real_resistor; + else + scale = 1000; + + + *val = be16_to_cpu(raws) * scale; + +adc_unlock: + regmap_update_bits(regmap, RT9759_REG_ADCCTL, mask, 0); + + mutex_unlock(&data->adc_lock); + + return ret; +} + +static int rt9759_get_switching_state(struct rt9759_data *data, int *status) +{ + unsigned int switching_state; + int ret; + + ret = regmap_field_read(data->rm_fields[F_SWITCHING], &switching_state); + if (ret) + return ret; + + if (switching_state) + *status = POWER_SUPPLY_STATUS_CHARGING; + else + *status = POWER_SUPPLY_STATUS_NOT_CHARGING; + + return 0; +} + +static int rt9759_get_charger_health(struct rt9759_data *data) +{ + struct charger_event *evt = &data->chg_evt; + + if (evt->ucp_flag & RT9759_VBUSUCP_MASK) + return POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; + + if (evt->conv_flag & RT9759_TDIEOTP_MASK) + return POWER_SUPPLY_HEALTH_OVERHEAT; + + if (evt->wdt_flag & RT9759_WDT_MASK) + return POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE; + + if (evt->flt_flag & RT9759_BUSBATOVP_MASK) + return POWER_SUPPLY_HEALTH_OVERVOLTAGE; + + if (evt->flt_flag & RT9759_BUSBATOCP_MASK) + return POWER_SUPPLY_HEALTH_OVERCURRENT; + + return POWER_SUPPLY_HEALTH_GOOD; +} + +static const char * const rt9759_manufacturer = "Richtek Technology Corp."; +static const char * const rt9759_model = "RT9759"; + +static int rt9759_psy_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct rt9759_data *data = power_supply_get_drvdata(psy); + int *pval = &val->intval; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + return rt9759_get_switching_state(data, pval); + case POWER_SUPPLY_PROP_HEALTH: + *pval = rt9759_get_charger_health(data); + return 0; + case POWER_SUPPLY_PROP_ONLINE: + return regmap_field_read(data->rm_fields[F_CHG_EN], pval); + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + return rt9759_get_value_by_field_range(data, F_VBUSOVP, R_VBUSOVP, pval); + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + return rt9759_get_adc(data, ADC_VBUS, pval); + case POWER_SUPPLY_PROP_CURRENT_MAX: + return rt9759_get_value_by_field_range(data, F_IBUSOCP, R_IBUSOCP, pval); + case POWER_SUPPLY_PROP_CURRENT_NOW: + return rt9759_get_adc(data, ADC_IBUS, pval); + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: + return rt9759_get_value_by_field_range(data, F_VBATOVP, R_VBATOVP, pval); + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + return rt9759_get_value_by_field_range(data, F_IBATOCP, R_IBATOCP, pval); + case POWER_SUPPLY_PROP_TEMP: + return rt9759_get_adc(data, ADC_TDIE, pval); + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = rt9759_model; + return 0; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = rt9759_manufacturer; + return 0; + default: + return -ENODATA; + } +} + +static int rt9759_psy_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct rt9759_data *data = power_supply_get_drvdata(psy); + int intval = val->intval; + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + /* Before enabled, clear stored event */ + if (intval) + memset(&data->chg_evt, 0, sizeof(data->chg_evt)); + + return regmap_field_write(data->rm_fields[F_CHG_EN], !!intval); + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + return rt9759_set_value_by_field_range(data, F_VBUSOVP, R_VBUSOVP, intval); + case POWER_SUPPLY_PROP_CURRENT_MAX: + return rt9759_set_value_by_field_range(data, F_IBUSOCP, R_IBUSOCP, intval); + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: + return rt9759_set_value_by_field_range(data, F_VBATOVP, R_VBATOVP, intval); + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + return rt9759_set_value_by_field_range(data, F_IBATOCP, R_IBATOCP, intval); + default: + return -EINVAL; + } +} + +static const enum power_supply_property rt9759_psy_properties[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_HEALTH, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_VOLTAGE_MAX, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_CURRENT_MAX, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, + POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, + POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, +}; + +static int rt9759_psy_property_is_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + case POWER_SUPPLY_PROP_VOLTAGE_MAX: + case POWER_SUPPLY_PROP_CURRENT_MAX: + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: + case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: + return 1; + default: + return 0; + } +} + +static const unsigned int rt9759_wdt_millisecond[] = { 500, 1000, 5000, 30000 }; + +static ssize_t watchdog_timer_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct power_supply *psy = to_power_supply(dev); + struct rt9759_data *data = power_supply_get_drvdata(psy); + unsigned int wdt_tmr_now = 0, wdt_sel, wdt_dis; + int ret; + + ret = regmap_field_read(data->rm_fields[F_WDT_DIS], &wdt_dis); + if (ret) + return ret; + + if (!wdt_dis) { + ret = regmap_field_read(data->rm_fields[F_WDT_TMR], &wdt_sel); + if (ret) + return ret; + + wdt_tmr_now = rt9759_wdt_millisecond[wdt_sel]; + } + + return sysfs_emit(buf, "%d\n", wdt_tmr_now); +} + +static ssize_t watchdog_timer_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct power_supply *psy = to_power_supply(dev); + struct rt9759_data *data = power_supply_get_drvdata(psy); + unsigned int wdt_set, wdt_sel; + int ret; + + ret = kstrtouint(buf, 10, &wdt_set); + if (ret) + return ret; + + ret = regmap_field_write(data->rm_fields[F_WDT_DIS], 1); + if (ret) + return ret; + + wdt_sel = find_closest(wdt_set, rt9759_wdt_millisecond, + ARRAY_SIZE(rt9759_wdt_millisecond)); + + ret = regmap_field_write(data->rm_fields[F_WDT_TMR], wdt_sel); + if (ret) + return ret; + + if (wdt_set) { + ret = regmap_field_write(data->rm_fields[F_WDT_DIS], 0); + if (ret) + return ret; + } + + return count; +} + +static ssize_t battery_voltage_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct power_supply *psy = to_power_supply(dev); + struct rt9759_data *data = power_supply_get_drvdata(psy); + int vbat_now, ret; + + ret = rt9759_get_adc(data, ADC_VBAT, &vbat_now); + if (ret) + return ret; + + return sysfs_emit(buf, "%d\n", vbat_now); +} + +static ssize_t battery_current_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct power_supply *psy = to_power_supply(dev); + struct rt9759_data *data = power_supply_get_drvdata(psy); + int ibat_now, ret; + + ret = rt9759_get_adc(data, ADC_IBAT, &ibat_now); + if (ret) + return ret; + + return sysfs_emit(buf, "%d\n", ibat_now); +} + +static DEVICE_ATTR_RW(watchdog_timer); +static DEVICE_ATTR_RO(battery_voltage); +static DEVICE_ATTR_RO(battery_current); + +static struct attribute *rt9759_sysfs_attrs[] = { + &dev_attr_watchdog_timer.attr, + &dev_attr_battery_voltage.attr, + &dev_attr_battery_current.attr, + NULL +}; + +ATTRIBUTE_GROUPS(rt9759_sysfs); + +static int rt9759_register_psy(struct rt9759_data *data) +{ + struct device *dev = data->dev; + struct power_supply_desc *desc = &data->psy_desc; + struct power_supply_config cfg = {}; + char *psy_name; + + cfg.drv_data = data; + cfg.of_node = dev->of_node; + cfg.attr_grp = rt9759_sysfs_groups; + + psy_name = devm_kasprintf(dev, GFP_KERNEL, "rt9759-%s", dev_name(dev)); + if (!psy_name) + return -ENOMEM; + + desc->name = psy_name; + desc->type = POWER_SUPPLY_TYPE_USB; + desc->properties = rt9759_psy_properties; + desc->num_properties = ARRAY_SIZE(rt9759_psy_properties); + desc->property_is_writeable = rt9759_psy_property_is_writeable; + desc->get_property = rt9759_psy_get_property; + desc->set_property = rt9759_psy_set_property; + + data->psy = devm_power_supply_register(dev, desc, &cfg); + + return PTR_ERR_OR_ZERO(data->psy); +} + +static irqreturn_t rt9759_irq_handler(int irq, void *devid) +{ + struct rt9759_data *data = devid; + struct regmap *regmap = data->regmap; + struct charger_event *evt = &data->chg_evt; + int ret; + + ret = regmap_read(regmap, RT9759_REG_IBUSOCPUCP, &evt->ucp_flag); + if (ret) + return IRQ_NONE; + + ret = regmap_read(regmap, RT9759_REG_CONVST, &evt->conv_flag); + if (ret) + return IRQ_NONE; + + ret = regmap_read(regmap, RT9759_REG_CHGCTL0, &evt->wdt_flag); + if (ret) + return IRQ_NONE; + + ret = regmap_read(regmap, RT9759_REG_FLTFLAG, &evt->flt_flag); + if (ret) + return IRQ_NONE; + + power_supply_changed(data->psy); + + return IRQ_HANDLED; +} + +static int rt9759_config_batsense_resistor(struct rt9759_data *data) +{ + unsigned int shunt_resistor_uohms = 2000, rsense_sel; + + device_property_read_u32(data->dev, "shunt-resistor-micro-ohms", + &shunt_resistor_uohms); + + if (!shunt_resistor_uohms || shunt_resistor_uohms > 5000) + return -EINVAL; + + data->real_resistor = shunt_resistor_uohms; + + if (shunt_resistor_uohms <= 2000) { + rsense_sel = 0; + data->rg_resistor = 2000; + } else { + rsense_sel = 1; + data->rg_resistor = 5000; + } + + return regmap_field_write(data->rm_fields[F_IBAT_RSEN], rsense_sel); +} + +static const struct reg_sequence rt9759_init_regs[] = { + REG_SEQ(0x0B, 0x80, 1000), /* REG_RESET */ + REG_SEQ0(0x05, 0x00), /* VAC_OVP = 11V */ + REG_SEQ0(0x0B, 0x44), /* WDT_DIS = 1 */ + REG_SEQ0(0x0C, 0x06), /* TSBUS/TSBAT OTP_DIS = 1 */ + REG_SEQ0(0x0F, 0xF9), /* DIS ALARM & ADC_DONE */ + REG_SEQ0(0x14, 0x00), /* IBUS_ADC_DIS = 0 */ +}; + +static const struct regmap_config rt9759_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = RT9759_REG_OTHER4, +}; + +static int rt9759_probe(struct i2c_client *i2c) +{ + struct device *dev = &i2c->dev; + struct rt9759_data *data; + struct regmap *regmap; + unsigned int devid; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->dev = dev; + mutex_init(&data->adc_lock); + i2c_set_clientdata(i2c, data); + + regmap = devm_regmap_init_i2c(i2c, &rt9759_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n"); + + data->regmap = regmap; + + ret = devm_regmap_field_bulk_alloc(dev, regmap, data->rm_fields, + rt9759_chg_fields, + ARRAY_SIZE(rt9759_chg_fields)); + if (ret) + return dev_err_probe(dev, ret, "Failed to alloc regmap fields\n"); + + ret = regmap_field_read(data->rm_fields[F_DEV_ID], &devid); + if (ret) + return dev_err_probe(dev, ret, "Filaed to read devid\n"); + + if (devid != RT9759_DEVID) + return dev_err_probe(dev, -ENODEV, "Incorrect VID 0x%02x\n", devid); + + ret = regmap_register_patch(regmap, rt9759_init_regs, + ARRAY_SIZE(rt9759_init_regs)); + if (ret) + return dev_err_probe(dev, ret, "Failed to init registers\n"); + + ret = rt9759_config_batsense_resistor(data); + if (ret) + return dev_err_probe(dev, ret, "Failed to config batsense resistor\n"); + + ret = rt9759_register_psy(data); + if (ret) + return dev_err_probe(dev, ret, "Failed to init power supply\n"); + + return devm_request_threaded_irq(dev, i2c->irq, NULL, rt9759_irq_handler, + IRQF_ONESHOT, dev_name(dev), data); +} + +static void rt9759_shutdown(struct i2c_client *i2c) +{ + struct rt9759_data *data = i2c_get_clientdata(i2c); + + regmap_field_write(data->rm_fields[F_REG_RST], 1); +} + +static const struct of_device_id rt9759_device_match_table[] = { + { .compatible = "richtek,rt9759" }, + {} +}; +MODULE_DEVICE_TABLE(of, rt9759_device_match_table); + +static struct i2c_driver rt9759_charger_driver = { + .driver = { + .name = "rt9759", + .of_match_table = rt9759_device_match_table, + }, + .probe_new = rt9759_probe, + .shutdown = rt9759_shutdown, +}; +module_i2c_driver(rt9759_charger_driver); + +MODULE_DESCRIPTION("Richtek RT9759 charger driver"); +MODULE_AUTHOR("Allen Chiang "); +MODULE_AUTHOR("ChiYuan Huang "); +MODULE_LICENSE("GPL"); From patchwork Thu Oct 20 07:14:21 2022 Content-Type: text/plain; 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When the timer expires, the device + will disable the charging. To prevent the timer expires, any + host communication can make the timer restarted. + + Access: Read, Write + + Valid values: + - 500, 1000, 5000 or 30000 (milliseconds), + - 0: disabled + +What: /sys/class/power_supply/rt9759-*/battery_voltage +Date: Nov 2022 +KernelVersion: 6.2 +Contact: ChiYuan Huang +Description: + Reports the current BAT voltage. + + Access: Read-Only + + Valid values: Represented in microvolts + +What: /sys/class/power_supply/rt9759-*/battery_current +Date: Nov 2022 +KernelVersion: 6.2 +Contact: ChiYuan Huang +Description: + Reports the current BAT current. + + Access: Read-Only + + Valid values: Represented in microamps