From patchwork Wed Aug 10 03:04:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 596593 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 4F3CCC25B07 for ; Wed, 10 Aug 2022 03:05:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229480AbiHJDFM (ORCPT ); Tue, 9 Aug 2022 23:05:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36722 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229526AbiHJDFF (ORCPT ); Tue, 9 Aug 2022 23:05:05 -0400 Received: from mail-oa1-x29.google.com (mail-oa1-x29.google.com [IPv6:2001:4860:4864:20::29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43E2E7754D for ; Tue, 9 Aug 2022 20:05:04 -0700 (PDT) Received: by mail-oa1-x29.google.com with SMTP id 586e51a60fabf-10e615a36b0so16367765fac.1 for ; Tue, 09 Aug 2022 20:05:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=VoTUorVB9HyzFfV2C/VGInjiRUKcMUhtoE/4tJPuAVI=; b=gMyYIEwIcENjOzYY0rhgt9UlAiPWe6Ye5InpGwOxfZzB0nFQUR8tOartcbbJndnvLt uCm0HtxP/CEjUrdjyE2rZIU+wBeZEPzvyDiNm0seF1ql3VjDk2ui0DdpyUgm28xVMaRM MEeLytYCZ/2dt8a/SbmtvxDLS0aY0VKfR3myznuA/8iHZB8w6gPNzy3z3cVxduTC4XLU lJijJMrpqmK/dSg8uuP79vR2JFyDAZN4yOa0dzN7v4ELD4XD3JBgHUQbs8RgNCJ+eSMf uc3CNVtEH6bSnn4w1oa2D/OrJHcdtvfRN0obaFPafRNTFWBAKFFqPrTSuWCRj1QCmPpQ mjOQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=VoTUorVB9HyzFfV2C/VGInjiRUKcMUhtoE/4tJPuAVI=; b=qiX40le2TNqCtvLRym4II5t4Ih4F4dnowmQcgS6luLl7yeZsFXKVZNMPGIss91HxGT +rwGkNIL4/fQXBD3LpxEi9vowAaq87tcxwl/x/W7BS1M2iRm+oH1KIbU30Cb8Rw8L6ot fC4JSfdET0E1hL1250D87YmZYbbJ8mTY7aa9CFBumM9mJTzaMsGPK4vAG32eKtI0sJBh Z7OLT+CphNPkp/bZeyR2o7MY79bRB/iHMQWjnEiRE7eBWXt0fbrZGAxd/vqdl0sikwWN X/W+UFlb4LGWkxyTGOZgV8Wnq0onvqwOMUwec2r5HyIma+X0qpn9wmsGgrXj5q8PNnFn pTGg== X-Gm-Message-State: ACgBeo1yeWLfUXaQ2q5915YmlS6zczJXMmIu+GbZEv0B/dJSeECzHsCr Jbmj9FAs6UcWeYqE8h5jbOaosg== X-Google-Smtp-Source: AA6agR6Q4EHw/Pz75ueki6qIR9HWoMlc5nsLZ6+4VxfuV0l8szB92xxBf41GXX6Kk40xjvXNVukxHA== X-Received: by 2002:a05:6870:c1cd:b0:fe:1295:6e34 with SMTP id i13-20020a056870c1cd00b000fe12956e34mr643556oad.137.1660100703637; Tue, 09 Aug 2022 20:05:03 -0700 (PDT) Received: from builder.lan (104-57-184-186.lightspeed.austtx.sbcglobal.net. [104.57.184.186]) by smtp.gmail.com with ESMTPSA id s20-20020a0568080b1400b0032f0fd7e1f8sm409004oij.39.2022.08.09.20.05.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Aug 2022 20:05:03 -0700 (PDT) From: Bjorn Andersson To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH 1/2] dt-bindings: power: supply: Add Lenovo Yoga C630 EC Date: Tue, 9 Aug 2022 22:04:59 -0500 Message-Id: <20220810030500.2793882-2-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220810030500.2793882-1-bjorn.andersson@linaro.org> References: <20220810030500.2793882-1-bjorn.andersson@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add binding for the Embedded Controller found in the Qualcomm Snapdragon-based Lenovo Yoga C630. Signed-off-by: Bjorn Andersson --- .../power/supply/lenovo,yoga-c630-ec.yaml | 88 +++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/supply/lenovo,yoga-c630-ec.yaml diff --git a/Documentation/devicetree/bindings/power/supply/lenovo,yoga-c630-ec.yaml b/Documentation/devicetree/bindings/power/supply/lenovo,yoga-c630-ec.yaml new file mode 100644 index 000000000000..2dceb57a56b1 --- /dev/null +++ b/Documentation/devicetree/bindings/power/supply/lenovo,yoga-c630-ec.yaml @@ -0,0 +1,88 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/supply/lenovo,yoga-c630-ec.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Lenovo Yoga C630 Embedded Controller. + +maintainers: + - Bjorn Andersson + +description: + The Qualcomm Snapdragon-based Lenovo Yoga C630 has an Embedded Controller + (EC) which handles things such as battery and USB Type-C. This binding + describes the interface, on an I2C bus, to this EC. + +properties: + compatible: + const: lenovo,yoga-c630-ec + + reg: + const: 0x70 + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + + interrupts: + maxItems: 1 + +patternProperties: + '^connector@\d$': + $ref: /schemas/connector/usb-connector.yaml# + +required: + - compatible + - reg + - interrupts + +additionalProperties: false + +examples: + - |+ + #include + i2c1 { + clock-frequency = <400000>; + + #address-cells = <1>; + #size-cells = <0>; + + embedded-controller@70 { + compatible = "lenovo,yoga-c630-ec"; + reg = <0x70>; + + interrupts-extended = <&tlmm 20 IRQ_TYPE_LEVEL_HIGH>; + + #address-cells = <1>; + #size-cells = <0>; + + connector@0 { + compatible = "usb-c-connector"; + reg = <0>; + power-role = "source"; + data-role = "host"; + }; + + connector@1 { + compatible = "usb-c-connector"; + reg = <1>; + power-role = "source"; + data-role = "host"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + port@1 { + reg = <1>; + lenovo_ec_dp_in: endpoint { + remote-endpoint = <&mdss_dp_out>; + }; + }; + }; + }; + }; + }; +... From patchwork Wed Aug 10 03:05:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 597181 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 8C313C282E7 for ; Wed, 10 Aug 2022 03:05:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229526AbiHJDFN (ORCPT ); Tue, 9 Aug 2022 23:05:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229621AbiHJDFH (ORCPT ); Tue, 9 Aug 2022 23:05:07 -0400 Received: from mail-oi1-x236.google.com (mail-oi1-x236.google.com [IPv6:2607:f8b0:4864:20::236]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E1EF80F78 for ; Tue, 9 Aug 2022 20:05:05 -0700 (PDT) Received: by mail-oi1-x236.google.com with SMTP id u9so16178374oiv.12 for ; Tue, 09 Aug 2022 20:05:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=DJUM0H5nWnlK5sCtI3BuhNWFB7lAw+BQ8FAQo0GkIlc=; b=WNcBjkMXdkJi2tobHhlF+PDyLly87zGXFN03liljIrnJAUwXDUnwLDvAfxw7P0xabL jIPUeOdesxt927tB2O32I1K2RI/n1lKMC0H+OrMeOZCwG+Jo3tVEJ4tC2DJ6W66Wj13h v6CPguQpaZLxMFsmMy/iGbd9gklrUtgb+ej7fW45BE4f4m8ofYmnwjcYozsaCuSCWUIe eut+2hHzQ2QtLSdZegzdSpsIf4G0YAU1F4cZllIoAz8PlTO0T1UP6KkPImiJKiCCvOpU e2dOUKjwaBm7R9dU3OOQkl5hNCcQ03+CnxVPGdAw34my93vaK3MT4GIAzuuyXAjrRqSU UTEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=DJUM0H5nWnlK5sCtI3BuhNWFB7lAw+BQ8FAQo0GkIlc=; b=XEfQSWUWfs+0Wbyi8Su+QM0BU2wbH9Xga/Tf/FJiqTanvjuDzZWDtNV2HBxHoIDQiK 0L+2DeUH526m4jk1RxA6bleboePgTqgxfFKOBqtokQKFgW1vK0xj6Z9tvj38SecTtbE9 9v1EuD8aYc6JPxbRt4DsPsk2Kg/+yuGtdPmmu72GyjkLFv0Au0Bvu5fnoWRCMKm0j9r7 xXDvrCpYvcWWQaufjRPHG10Iwt36YlO9LgASbe+a+inG7/XtkI5i6NQuYr70QD9ukVV/ oaK9bymqxtlQzuO0sc671tkkjdJvMrOY8xjS6nP4JCl5Gv1v8VyUC5hjglikk4opVkDN B6aQ== X-Gm-Message-State: ACgBeo23SJ8HzZ3TxbenCmUWTbGbegJ1RUMSW6l0MABUpbcNlusYpMWo 084/Ct/LjkXtTbYAfWNEo7rrqg== X-Google-Smtp-Source: AA6agR44wLF7f5OYt6hc65Qhsx/yEZzxoIHleyboRiHuAiaWW3dnbRSfUbZqa6Uqen4dPY0cd9Avdw== X-Received: by 2002:aca:3557:0:b0:342:c29e:59c8 with SMTP id c84-20020aca3557000000b00342c29e59c8mr597619oia.78.1660100704523; Tue, 09 Aug 2022 20:05:04 -0700 (PDT) Received: from builder.lan (104-57-184-186.lightspeed.austtx.sbcglobal.net. [104.57.184.186]) by smtp.gmail.com with ESMTPSA id s20-20020a0568080b1400b0032f0fd7e1f8sm409004oij.39.2022.08.09.20.05.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Aug 2022 20:05:04 -0700 (PDT) From: Bjorn Andersson To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH 2/2] power: supply: Add Lenovo Yoga C630 EC driver Date: Tue, 9 Aug 2022 22:05:00 -0500 Message-Id: <20220810030500.2793882-3-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220810030500.2793882-1-bjorn.andersson@linaro.org> References: <20220810030500.2793882-1-bjorn.andersson@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The Qualcomm Snapdragon-based Lenovo Yoga C630 has some sort of EC providing AC-adapter and battery status, as well as USB Type-C altmode notifications for Displayport operation. The Yoga C630 ships with Windows, where these operations primarily are implemented in ACPI, but due to various issues with the hardware representation therein it's not possible to run Linux on this information. As such this is a best-effort re-implementation of these operations, based on the register map expressed in ACPI and a fair amount of trial and error. Signed-off-by: Bjorn Andersson --- drivers/power/supply/Kconfig | 11 + drivers/power/supply/Makefile | 1 + drivers/power/supply/yoga-c630-ec.c | 547 ++++++++++++++++++++++++++++ 3 files changed, 559 insertions(+) create mode 100644 drivers/power/supply/yoga-c630-ec.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 1aa8323ad9f6..6e706e948ad2 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -897,4 +897,15 @@ config BATTERY_UG3105 device is off or suspended, the functionality of this driver is limited to reporting capacity only. +config LENOVO_YOGA_C630_EC + tristate "Lenovo Yoga C630 EC battery driver" + depends on DRM + depends on I2C + help + Driver for the Embedded Controller in the Qualcomm Snapdragon-based + Lenovo Yoga C630, which provides battery information and USB Type-C + altmode notifications. + + Say M or Y here to include this support. + endif # POWER_SUPPLY diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index 7f02f36aea55..24a4129cc427 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -108,3 +108,4 @@ obj-$(CONFIG_BATTERY_ACER_A500) += acer_a500_battery.o obj-$(CONFIG_BATTERY_SURFACE) += surface_battery.o obj-$(CONFIG_CHARGER_SURFACE) += surface_charger.o obj-$(CONFIG_BATTERY_UG3105) += ug3105_battery.o +obj-$(CONFIG_LENOVO_YOGA_C630_EC) += yoga-c630-ec.o diff --git a/drivers/power/supply/yoga-c630-ec.c b/drivers/power/supply/yoga-c630-ec.c new file mode 100644 index 000000000000..1fa0b5844e01 --- /dev/null +++ b/drivers/power/supply/yoga-c630-ec.c @@ -0,0 +1,547 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2022 Linaro Ltd. + */ +#include +#include +#include +#include +#include +#include +#include + +#include + +#define LENOVO_EC_CACHE_TIME (10 * HZ) + +#define LENOVO_EC_RESPONSE_REG 0x1 +#define LENOVO_EC_REQUEST_REG 0x2 + +#define LENOVO_EC_READ_REG 0xb0 +#define LENOVO_EC_QUERY_USB_EVENT 0x8 +#define LENOVO_EC_USB_EVENT_MUX GENMASK(1, 0) +#define LENOVO_EC_USB_EVENT_ORIENTATION BIT(7) +#define LENOVO_EC_ADPT_STATUS 0xa3 +#define LENOVO_EC_ADPT_PRESENT BIT(7) +#define LENOVO_EC_BAT_STATUS 0xc1 +#define LENOVO_EC_BAT_VOLTAGE 0xc6 +#define LENOVO_EC_BAT_CURRENT 0xd2 +#define LENOVO_EC_BAT_PRESENT 0xda +#define LENOVO_EC_BAT_ATTRIBUTES 0xc0 +#define LENOVO_EC_BAT_ATTR_UNIT_IS_MA BIT(1) +#define LENOVO_EC_BAT_REMAIN_CAPACITY 0xc2 +#define LENOVO_EC_BAT_DESIGN_VOLTAGE 0xc8 +#define LENOVO_EC_BAT_DESIGN_CAPACITY 0xca +#define LENOVO_EC_BAT_FULL_CAPACITY 0xcc +#define LENOVO_EC_BAT_FULL_FACTORY 0xd6 +#define LENOVO_EC_BAT_FULL_REGISTER 0xdb + +#define LENOVO_EC_REQUEST_NEXT_EVENT 0x84 +#define LENOVO_EC_EVENT_USB 0x20 +#define LENOVO_EC_EVENT_UCSI 0x21 +#define LENOVO_EC_EVENT_HPD 0x22 +#define LENOVO_EC_EVENT_BAT_STATUS 0x24 +#define LENOVO_EC_EVENT_BAT_INFO 0x25 +#define LENOVO_EC_EVENT_BAT_ADPT_STATUS 0x37 + +struct yoga_c630_ec { + struct i2c_client *client; + struct mutex lock; + + struct power_supply *adp_psy; + struct power_supply *bat_psy; + + struct typec_switch *typec_switch; + + unsigned long last_status_update; + + bool adapter_online; + + bool unit_ma; + + unsigned int scale; + + bool bat_present; + unsigned int bat_status; + + unsigned int design_capacity; + unsigned int design_voltage; + unsigned int full_charge_capacity; + + unsigned int capacity_now; + unsigned int voltage_now; + + int rate_now; + + bool bridge_configured; + struct drm_bridge bridge; +}; + +static int yoga_c630_ec_request(struct yoga_c630_ec *ec, u8 *req, size_t req_len, + u8 *resp, size_t resp_len) +{ + int ret; + + WARN_ON(!mutex_is_locked(&ec->lock)); + + ret = i2c_smbus_write_i2c_block_data(ec->client, LENOVO_EC_REQUEST_REG, + req_len, req); + if (ret < 0) + return ret; + + return i2c_smbus_read_i2c_block_data(ec->client, LENOVO_EC_RESPONSE_REG, + resp_len, resp); +} + +static int yoga_c630_ec_read8(struct yoga_c630_ec *ec, u8 addr) +{ + int ret; + u8 val; + + ret = yoga_c630_ec_request(ec, (u8[]) { LENOVO_EC_READ_REG, addr }, 2, + &val, 1); + if (ret < 0) + return ret; + + return val; +} + +static int yoga_c630_ec_read16(struct yoga_c630_ec *ec, u8 addr) +{ + int ret; + u8 msb; + u8 lsb; + + ret = yoga_c630_ec_request(ec, (u8[]) { LENOVO_EC_READ_REG, addr }, 2, + &lsb, 1); + if (ret < 0) + return ret; + + ret = yoga_c630_ec_request(ec, (u8[]) { LENOVO_EC_READ_REG, addr + 1 }, 2, + &msb, 1); + if (ret < 0) + return ret; + + return msb << 8 | lsb; +} + +static void yoga_c630_ec_update_bat_info(struct yoga_c630_ec *ec) +{ + int val; + + mutex_lock(&ec->lock); + + val = yoga_c630_ec_read8(ec, LENOVO_EC_BAT_PRESENT); + if (val < 0) + goto out_unlock; + ec->bat_present = !!(val & BIT(0)); + if (!ec->bat_present) + goto out_unlock; + + val = yoga_c630_ec_read8(ec, LENOVO_EC_BAT_ATTRIBUTES); + if (val < 0) + goto out_unlock; + ec->unit_ma = val & LENOVO_EC_BAT_ATTR_UNIT_IS_MA; + if (!ec->unit_ma) + ec->scale = 1000; + else + ec->scale = 1; + + val = yoga_c630_ec_read16(ec, LENOVO_EC_BAT_DESIGN_CAPACITY); + if (val < 0) + goto out_unlock; + ec->design_capacity = val * ec->scale; + + msleep(50); + + val = yoga_c630_ec_read16(ec, LENOVO_EC_BAT_DESIGN_VOLTAGE); + if (val < 0) + goto out_unlock; + ec->design_voltage = val; + + msleep(50); + + val = yoga_c630_ec_read8(ec, LENOVO_EC_BAT_FULL_REGISTER); + if (val < 0) + goto out_unlock; + if (val & BIT(0)) + val = yoga_c630_ec_read16(ec, LENOVO_EC_BAT_FULL_FACTORY); + else + val = yoga_c630_ec_read16(ec, LENOVO_EC_BAT_FULL_CAPACITY); + if (val < 0) + goto out_unlock; + ec->full_charge_capacity = val * ec->scale; + +out_unlock: + mutex_unlock(&ec->lock); +} + +static void yoga_c630_ec_maybe_update_bat_status(struct yoga_c630_ec *ec) +{ + int val = 0; + + mutex_lock(&ec->lock); + + if (time_before(jiffies, ec->last_status_update + LENOVO_EC_CACHE_TIME)) + goto out_unlock; + + val = yoga_c630_ec_read8(ec, LENOVO_EC_BAT_STATUS); + if (val < 0) + goto out_unlock; + ec->bat_status = val; + + val = yoga_c630_ec_read16(ec, LENOVO_EC_BAT_REMAIN_CAPACITY); + if (val < 0) + goto out_unlock; + ec->capacity_now = val * ec->scale; + + val = yoga_c630_ec_read16(ec, LENOVO_EC_BAT_VOLTAGE); + if (val < 0) + goto out_unlock; + ec->voltage_now = val; + + val = yoga_c630_ec_read16(ec, LENOVO_EC_BAT_CURRENT); + if (val < 0) + goto out_unlock; + ec->rate_now = sign_extend32(val, 15) * ec->scale; + + if (ec->unit_ma) + ec->rate_now = ec->rate_now * ec->voltage_now / 1000; + + ec->last_status_update = jiffies; + +out_unlock: + mutex_unlock(&ec->lock); +} + +static int yoga_c630_ec_update_adapter_status(struct yoga_c630_ec *ec) +{ + int val; + + mutex_lock(&ec->lock); + + val = yoga_c630_ec_read8(ec, LENOVO_EC_ADPT_STATUS); + if (val > 0) + ec->adapter_online = FIELD_GET(LENOVO_EC_ADPT_PRESENT, val); + + mutex_unlock(&ec->lock); + + return val; +} + +static bool yoga_c630_ec_is_charged(struct yoga_c630_ec *ec) +{ + if (ec->bat_status != 0) + return false; + + if (ec->full_charge_capacity == ec->capacity_now) + return true; + + if (ec->design_capacity == ec->capacity_now) + return true; + + return false; +} + +static int yoga_c630_ec_bat_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct yoga_c630_ec *ec = power_supply_get_drvdata(psy); + int rc = 0; + + if (ec->bat_present) + yoga_c630_ec_maybe_update_bat_status(ec); + else if (psp != POWER_SUPPLY_PROP_PRESENT) + return -ENODEV; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + if (ec->bat_status & BIT(0)) + val->intval = POWER_SUPPLY_STATUS_DISCHARGING; + else if (ec->bat_status & BIT(1)) + val->intval = POWER_SUPPLY_STATUS_CHARGING; + else if (yoga_c630_ec_is_charged(ec)) + val->intval = POWER_SUPPLY_STATUS_FULL; + else + val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; + break; + case POWER_SUPPLY_PROP_PRESENT: + val->intval = ec->bat_present; + break; + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: + val->intval = ec->design_voltage; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: + val->intval = ec->design_capacity; + break; + case POWER_SUPPLY_PROP_CHARGE_FULL: + val->intval = ec->full_charge_capacity; + break; + case POWER_SUPPLY_PROP_CHARGE_NOW: + val->intval = ec->capacity_now; + break; + case POWER_SUPPLY_PROP_CURRENT_NOW: + val->intval = ec->rate_now; + break; + case POWER_SUPPLY_PROP_VOLTAGE_NOW: + val->intval = ec->voltage_now; + break; + case POWER_SUPPLY_PROP_TECHNOLOGY: + val->intval = POWER_SUPPLY_TECHNOLOGY_LION; + break; + case POWER_SUPPLY_PROP_MODEL_NAME: + val->strval = "PABAS0241231"; + break; + case POWER_SUPPLY_PROP_MANUFACTURER: + val->strval = "Compal"; + break; + case POWER_SUPPLY_PROP_SERIAL_NUMBER: + val->strval = "05072018"; + break; + default: + rc = -EINVAL; + break; + } + + return rc; +} + +static enum power_supply_property yoga_c630_ec_bat_properties[] = { + POWER_SUPPLY_PROP_STATUS, + POWER_SUPPLY_PROP_PRESENT, + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, + POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, + POWER_SUPPLY_PROP_CHARGE_FULL, + POWER_SUPPLY_PROP_CHARGE_NOW, + POWER_SUPPLY_PROP_CURRENT_NOW, + POWER_SUPPLY_PROP_VOLTAGE_NOW, + POWER_SUPPLY_PROP_TECHNOLOGY, + POWER_SUPPLY_PROP_MODEL_NAME, + POWER_SUPPLY_PROP_MANUFACTURER, + POWER_SUPPLY_PROP_SERIAL_NUMBER, +}; + +static const struct power_supply_desc yoga_c630_ec_bat_psy_desc = { + .name = "yoga-c630-battery", + .type = POWER_SUPPLY_TYPE_BATTERY, + .properties = yoga_c630_ec_bat_properties, + .num_properties = ARRAY_SIZE(yoga_c630_ec_bat_properties), + .get_property = yoga_c630_ec_bat_get_property, +}; + +static int yoga_c630_ec_adpt_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct yoga_c630_ec *ec = power_supply_get_drvdata(psy); + int rc = 0; + + yoga_c630_ec_update_adapter_status(ec); + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + val->intval = ec->adapter_online; + break; + default: + rc = -EINVAL; + break; + } + + return rc; +} + +static enum power_supply_property yoga_c630_ec_adpt_properties[] = { + POWER_SUPPLY_PROP_ONLINE, +}; + +static const struct power_supply_desc yoga_c630_ec_adpt_psy_desc = { + .name = "yoga-c630-adapter", + .type = POWER_SUPPLY_TYPE_USB_TYPE_C, + .properties = yoga_c630_ec_adpt_properties, + .num_properties = ARRAY_SIZE(yoga_c630_ec_adpt_properties), + .get_property = yoga_c630_ec_adpt_get_property, +}; + +static int yoga_c630_ec_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + return flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR ? 0 : -EINVAL; +} + +static const struct drm_bridge_funcs yoga_c630_ec_bridge_funcs = { + .attach = yoga_c630_ec_attach, +}; + +static int yoga_c630_ec_query_usb_event(struct yoga_c630_ec *ec) +{ + struct device *dev = &ec->client->dev; + enum typec_orientation orientation; + enum drm_connector_status status; + int event; + + mutex_lock(&ec->lock); + event = yoga_c630_ec_read8(ec, LENOVO_EC_QUERY_USB_EVENT); + mutex_unlock(&ec->lock); + if (event < 0) { + dev_err(dev, "unable to query USB event\n"); + return event; + } + + if (FIELD_GET(LENOVO_EC_USB_EVENT_MUX, event)) + status = connector_status_connected; + else + status = connector_status_disconnected; + + if (FIELD_GET(LENOVO_EC_USB_EVENT_ORIENTATION, event)) + orientation = TYPEC_ORIENTATION_REVERSE; + else + orientation = TYPEC_ORIENTATION_NORMAL; + + typec_switch_set(ec->typec_switch, orientation); + if (ec->bridge_configured) + drm_bridge_hpd_notify(&ec->bridge, status); + + return 0; +} + +static irqreturn_t yoga_c630_ec_intr(int irq, void *data) +{ + struct yoga_c630_ec *ec = data; + u8 event; + int ret; + + mutex_lock(&ec->lock); + ret = yoga_c630_ec_request(ec, (u8[]){ LENOVO_EC_REQUEST_NEXT_EVENT }, 1, + &event, 1); + mutex_unlock(&ec->lock); + if (ret < 0) + return IRQ_HANDLED; + + switch (event) { + case LENOVO_EC_EVENT_USB: + case LENOVO_EC_EVENT_HPD: + yoga_c630_ec_query_usb_event(ec); + break; + case LENOVO_EC_EVENT_BAT_INFO: + yoga_c630_ec_update_bat_info(ec); + break; + case LENOVO_EC_EVENT_BAT_ADPT_STATUS: + power_supply_changed(ec->adp_psy); + fallthrough; + case LENOVO_EC_EVENT_BAT_STATUS: + power_supply_changed(ec->bat_psy); + break; + } + + return IRQ_HANDLED; +} + +static void yoga_c630_ec_put_switch(void *data) +{ + typec_switch_put(data); +} + +static int yoga_c630_ec_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct power_supply_config adp_cfg = {}; + struct power_supply_config bat_cfg = {}; + struct fwnode_handle *fwnode; + struct yoga_c630_ec *ec; + struct device *dev = &client->dev; + u32 port; + int ret; + + ec = devm_kzalloc(dev, sizeof(*ec), GFP_KERNEL); + if (!ec) + return -ENOMEM; + + mutex_init(&ec->lock); + ec->client = client; + + adp_cfg.drv_data = ec; + adp_cfg.of_node = client->dev.of_node; + ec->adp_psy = devm_power_supply_register(dev, &yoga_c630_ec_adpt_psy_desc, &adp_cfg); + if (IS_ERR(ec->adp_psy)) { + dev_err(dev, "failed to register AC adapter supply\n"); + return PTR_ERR(ec->adp_psy); + } + + bat_cfg.drv_data = ec; + bat_cfg.of_node = client->dev.of_node; + ec->bat_psy = devm_power_supply_register(dev, &yoga_c630_ec_bat_psy_desc, &bat_cfg); + if (IS_ERR(ec->bat_psy)) { + dev_err(dev, "failed to register battery supply\n"); + return PTR_ERR(ec->bat_psy); + } + + device_for_each_child_node(dev, fwnode) { + ret = fwnode_property_read_u32(fwnode, "reg", &port); + if (ret < 0) + continue; + + /* Got multiple ports, but altmode is only possible on port 1 */ + if (port != 1) + continue; + + ec->bridge.funcs = &yoga_c630_ec_bridge_funcs; + ec->bridge.of_node = to_of_node(fwnode); + ec->bridge.ops = DRM_BRIDGE_OP_HPD; + ec->bridge.type = DRM_MODE_CONNECTOR_USB; + + ret = devm_drm_bridge_add(dev, &ec->bridge); + if (ret) { + dev_err(dev, "failed to register drm bridge\n"); + fwnode_handle_put(fwnode); + return ret; + } + + ec->bridge_configured = true; + + ec->typec_switch = fwnode_typec_switch_get(fwnode); + if (IS_ERR(ec->typec_switch)) + return dev_err_probe(dev, PTR_ERR(ec->typec_switch), + "failed to acquire orientation-switch for port 1\n"); + + ret = devm_add_action_or_reset(dev, yoga_c630_ec_put_switch, + ec->typec_switch); + if (ret) + return ret; + } + + ret = devm_request_threaded_irq(dev, client->irq, + NULL, yoga_c630_ec_intr, + IRQF_ONESHOT, "yoga_c630_ec", ec); + if (ret < 0) + return dev_err_probe(dev, ret, "unable to request irq\n"); + + yoga_c630_ec_update_bat_info(ec); + + return 0; +} + +static const struct of_device_id yoga_c630_ec_of_match[] = { + { .compatible = "lenovo,yoga-c630-ec" }, + {} +}; +MODULE_DEVICE_TABLE(of, yoga_c630_ec_of_match); + +static const struct i2c_device_id yoga_c630_ec_i2c_id_table[] = { + { "yoga-c630-ec", }, + {} +}; +MODULE_DEVICE_TABLE(i2c, yoga_c630_ec_i2c_id_table); + +static struct i2c_driver yoga_c630_ec_i2c_driver = { + .driver = { + .name = "yoga-c630-ec", + .of_match_table = yoga_c630_ec_of_match, + }, + .probe = yoga_c630_ec_probe, + .id_table = yoga_c630_ec_i2c_id_table, +}; +module_i2c_driver(yoga_c630_ec_i2c_driver); + +MODULE_DESCRIPTION("Lenovo Yoga C630 EC driver"); +MODULE_LICENSE("GPL");