From patchwork Mon May 27 10:03:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13674996 Received: from mail-lj1-f180.google.com (mail-lj1-f180.google.com [209.85.208.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C588513AD04 for ; Mon, 27 May 2024 10:03:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.180 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716804238; cv=none; b=Dq2UVQIfb1cC4JSJNMAGQg7iuQVo5EQz8ag7S7YnHdq78SNs2nEfQk1J2hnMmdqJ6GZUuDZX7Q9njcZi7wpAt5XSPr56S7H9PjakpBhdX4inGID8h2hQINkecfKpbkXFTcggJLLQjaOPLhCOvjLxz7OrTPJuw8tEaembRmo5bx8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716804238; c=relaxed/simple; bh=I2yK+f17QGvCBbxV9mu1qHPoL9MAc+tgbTW9LI9tZgw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=b8OgSwfiyDf/6Jz94+6Av6Rp2R7vIGkIQz65TXUCxN0/GGepTnvk8yi/riEN5Yt0CtaSQkwem45cx19nWpQrZtubodSDyKlm6oThRpe8bI1HlyK/0I3fSgBL7ObPdWmSewafd/71uy1EhtUqU1poko0wAgfLzDEkAQ38hPKj/T8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=jJd6fIXy; arc=none smtp.client-ip=209.85.208.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="jJd6fIXy" Received: by mail-lj1-f180.google.com with SMTP id 38308e7fff4ca-2e73359b979so80517471fa.1 for ; Mon, 27 May 2024 03:03:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1716804233; x=1717409033; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=fVK5TzUsekz8eA0P5r1NzTMbXr5dKzZwCG1F9TIdIXw=; b=jJd6fIXy4g4hVZy+Y16SBpkDQl0pHU8+3vKzMwQvZrHLdDUsaVpg/tCxWxSGwVDWQK P7Arht9TgJVzKJwXV9qIXeKVjv1bq33OeB3w2ugaRscayUX8Uc4HBROYudUiZMuoSe9u bQ2/EBBOWyEtuuv07zzXq40JtZ2gfAsvnz5aGTFFqv5HchHAJOFrrRO+h0+bcqXI7Jf5 RVXJO/WEWCt0sn5G+0JfYMFOPT4ntO6kLIBu9qypE3tMZYwLlOqKl/PprCgQBICMyPJ1 g6tHvkJAjKylRoCk8HzUgL/nRK6s+hlzhG6Drat4D2cCr88/hmkHPFt3sxldaVbw0asM ZUVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716804233; x=1717409033; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=fVK5TzUsekz8eA0P5r1NzTMbXr5dKzZwCG1F9TIdIXw=; b=WqHNc7aA/F+J0Hhen7z82YrpZVF0qqInlbPu3JHtsSc5lKdzNbKPlFD7b6BZmfxyx2 kxPRx3ftc2QlopNVB63HJgBFg2yjXOKyYzllEmzwanH/hxvl/lhzgTykBegFYbjn71SK 4WnTNewb+CeTBsymcm6RCb6sDxenOupcK/hHt61kr7MUFv/bChsPNIsn3avmA5Z0Zcvh r6vpTQLYPYm+GahDX90Dae3OMY1t4zng9wEFAWWRW6oPa84Lib44JR1xD5vbc8FEl/ZF hy3xyRlb5jmxKO/AR1IWprqpLiJUEKNo4UpRkIsI+xuune+yFbBA/tIY3mI7jhqe2yan t7AA== X-Gm-Message-State: AOJu0YzFy5duvWQ3Nl+nmtfLG6vyKifvAuh9Lv3CNW5Z+MfCRqvKB16L BhZue6S/M8/g56O7vat47JOpXESQ+DiKz3s9AZwJgl+UHq016SqgEsL+04JU0Fs= X-Google-Smtp-Source: AGHT+IG/AHVCcty7CupHo9QX2dpXDmjcLwqx97IumZ0V6hgYoyyoXE6K3CBOp9FbZhofcYczjkGgHA== X-Received: by 2002:a2e:9653:0:b0:2e9:6e0a:b8ed with SMTP id 38308e7fff4ca-2e96e0ab9edmr25104751fa.4.1716804232792; Mon, 27 May 2024 03:03:52 -0700 (PDT) Received: from umbar.lan ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-2e95bcf4bdfsm18616651fa.63.2024.05.27.03.03.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 May 2024 03:03:52 -0700 (PDT) From: Dmitry Baryshkov Date: Mon, 27 May 2024 13:03:47 +0300 Subject: [PATCH v3 2/6] platform: arm64: add Lenovo Yoga C630 WOS EC driver Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240527-yoga-ec-driver-v3-2-327a9851dad5@linaro.org> References: <20240527-yoga-ec-driver-v3-0-327a9851dad5@linaro.org> In-Reply-To: <20240527-yoga-ec-driver-v3-0-327a9851dad5@linaro.org> To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Bryan O'Donoghue , Heikki Krogerus , Greg Kroah-Hartman , Konrad Dybcio Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-msm@vger.kernel.org, Nikita Travkin X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=10790; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=I2yK+f17QGvCBbxV9mu1qHPoL9MAc+tgbTW9LI9tZgw=; b=owGbwMvMwMXYbdNlx6SpcZXxtFoSQ1pIVGtCmI38rvk/JEscdl5bVDjzhob21Dk/19rzVuuuZ 8qL/OnSyWjMwsDIxSArpsjiU9AyNWZTctiHHVPrYQaxMoFMYeDiFICJbLjHwdCVnV8oqzPtb3d6 0v0i1dx/BvHtruGfD01iubPTMTF+/rrj/ELp7I8K1yxnDLC9dOZz0fdAreVZAS7zz3FPE80Q6fO VYNdmXZ433UZikwcfs839ilgOsd8K0865pZqtFXAW7Rb/vvz6fF8XDy6RkguhZk84ljAtYf7Vzj y5beMeL+PUpe+tt8ix7i8tkdt2TvBs02Ubz/+LNVXPlj/fbdSlr1IZcaR82qMttfcKbzmGLPk17 21+8CxeK9PJ3WvCj1U+k3kakeLlEf7Dfc7nWWJ6pQv/vdx/MUb//0LLXY65MxODW3vT8hOWLN/j qHuV91+thtUdns/h0y+KMDTGXHOzOdgoY/Te/mbWlBUWAA== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A Lenovo Yoga C630 WOS is a laptop using Snapdragon 850 SoC. Like many laptops it uses embedded controller (EC) to perform various platform operations, including, but not limited, to Type-C port control or power supply handlng. Add the driver for the EC, that creates devices for UCSI and power supply devices. Signed-off-by: Dmitry Baryshkov --- drivers/platform/arm64/Kconfig | 14 ++ drivers/platform/arm64/Makefile | 1 + drivers/platform/arm64/lenovo-yoga-c630.c | 279 +++++++++++++++++++++++++ include/linux/platform_data/lenovo-yoga-c630.h | 42 ++++ 4 files changed, 336 insertions(+) diff --git a/drivers/platform/arm64/Kconfig b/drivers/platform/arm64/Kconfig index 8fdca0f8e909..8c103b3150d1 100644 --- a/drivers/platform/arm64/Kconfig +++ b/drivers/platform/arm64/Kconfig @@ -32,4 +32,18 @@ config EC_ACER_ASPIRE1 laptop where this information is not properly exposed via the standard ACPI devices. +config EC_LENOVO_YOGA_C630 + tristate "Lenovo Yoga C630 Embedded Controller driver" + depends on I2C + help + Driver for the Embedded Controller in the Qualcomm Snapdragon-based + Lenovo Yoga C630, which provides battery and power adapter + information. + + This driver provides battery and AC status support for the mentioned + laptop where this information is not properly exposed via the + standard ACPI devices. + + Say M or Y here to include this support. + endif # ARM64_PLATFORM_DEVICES diff --git a/drivers/platform/arm64/Makefile b/drivers/platform/arm64/Makefile index 4fcc9855579b..b2ae9114fdd8 100644 --- a/drivers/platform/arm64/Makefile +++ b/drivers/platform/arm64/Makefile @@ -6,3 +6,4 @@ # obj-$(CONFIG_EC_ACER_ASPIRE1) += acer-aspire1-ec.o +obj-$(CONFIG_EC_LENOVO_YOGA_C630) += lenovo-yoga-c630.o diff --git a/drivers/platform/arm64/lenovo-yoga-c630.c b/drivers/platform/arm64/lenovo-yoga-c630.c new file mode 100644 index 000000000000..3d1d5acde807 --- /dev/null +++ b/drivers/platform/arm64/lenovo-yoga-c630.c @@ -0,0 +1,279 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2024, Linaro Ltd + * Authors: + * Bjorn Andersson + * Dmitry Baryshkov + */ +#include +#include +#include +#include +#include + +#define LENOVO_EC_RESPONSE_REG 0x01 +#define LENOVO_EC_REQUEST_REG 0x02 + +#define LENOVO_EC_UCSI_WRITE 0x20 +#define LENOVO_EC_UCSI_READ 0x21 + +#define LENOVO_EC_READ_REG 0xb0 +#define LENOVO_EC_REQUEST_NEXT_EVENT 0x84 + +struct yoga_c630_ec { + struct i2c_client *client; + struct mutex lock; + struct blocking_notifier_head notifier_list; +}; + +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); +} + +int yoga_c630_ec_read8(struct yoga_c630_ec *ec, u8 addr) +{ + u8 req[2] = { LENOVO_EC_READ_REG, }; + int ret; + u8 val; + + mutex_lock(&ec->lock); + req[1] = addr; + ret = yoga_c630_ec_request(ec, req, sizeof(req), &val, 1); + mutex_unlock(&ec->lock); + + return ret < 0 ? ret : val; +} +EXPORT_SYMBOL_GPL(yoga_c630_ec_read8); + +int yoga_c630_ec_read16(struct yoga_c630_ec *ec, u8 addr) +{ + u8 req[2] = { LENOVO_EC_READ_REG, }; + int ret; + u8 msb; + u8 lsb; + + mutex_lock(&ec->lock); + + req[1] = addr; + ret = yoga_c630_ec_request(ec, req, sizeof(req), &lsb, 1); + if (ret < 0) + goto out; + + req[1] = addr + 1; + ret = yoga_c630_ec_request(ec, req, sizeof(req), &msb, 1); + +out: + mutex_unlock(&ec->lock); + + return ret < 0 ? ret : msb << 8 | lsb; +} +EXPORT_SYMBOL_GPL(yoga_c630_ec_read16); + +u16 yoga_c630_ec_ucsi_get_version(struct yoga_c630_ec *ec) +{ + u8 req[3] = { 0xb3, 0xf2, 0x20}; + int ret; + u8 msb; + u8 lsb; + + mutex_lock(&ec->lock); + ret = yoga_c630_ec_request(ec, req, sizeof(req), &lsb, 1); + if (ret < 0) + goto out; + + req[2]++; + ret = yoga_c630_ec_request(ec, req, sizeof(req), &msb, 1); + +out: + mutex_unlock(&ec->lock); + + return ret < 0 ? ret : msb << 8 | lsb; +} +EXPORT_SYMBOL_GPL(yoga_c630_ec_ucsi_get_version); + +int yoga_c630_ec_ucsi_write(struct yoga_c630_ec *ec, + const u8 req[YOGA_C630_UCSI_WRITE_SIZE]) +{ + int ret; + + mutex_lock(&ec->lock); + ret = i2c_smbus_write_i2c_block_data(ec->client, LENOVO_EC_UCSI_WRITE, + YOGA_C630_UCSI_WRITE_SIZE, req); + mutex_unlock(&ec->lock); + + return ret < 0 ? ret : 0; +} +EXPORT_SYMBOL_GPL(yoga_c630_ec_ucsi_write); + +int yoga_c630_ec_ucsi_read(struct yoga_c630_ec *ec, + u8 resp[YOGA_C630_UCSI_READ_SIZE]) +{ + int ret; + + mutex_lock(&ec->lock); + ret = i2c_smbus_read_i2c_block_data(ec->client, LENOVO_EC_UCSI_READ, + YOGA_C630_UCSI_READ_SIZE, resp); + mutex_unlock(&ec->lock); + + return ret < 0 ? ret : 0; +} +EXPORT_SYMBOL_GPL(yoga_c630_ec_ucsi_read); + +static irqreturn_t yoga_c630_ec_intr(int irq, void *data) +{ + u8 req[] = { LENOVO_EC_REQUEST_NEXT_EVENT }; + struct yoga_c630_ec *ec = data; + u8 event; + int ret; + + mutex_lock(&ec->lock); + ret = yoga_c630_ec_request(ec, req, sizeof(req), &event, 1); + mutex_unlock(&ec->lock); + if (ret < 0) + return IRQ_HANDLED; + + pr_info("NOTIFY %x\n", event); + + blocking_notifier_call_chain(&ec->notifier_list, event, ec); + + return IRQ_HANDLED; +} + +/** + * yoga_c630_ec_register_notify - Register a notifier callback for EC events. + * @ec: Yoga C630 EC + * @nb: Notifier block pointer to register + * + * Return: 0 on success or negative error code. + */ +int yoga_c630_ec_register_notify(struct yoga_c630_ec *ec, struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&ec->notifier_list, + nb); +} +EXPORT_SYMBOL_GPL(yoga_c630_ec_register_notify); + +/** + * yoga_c630_ec_unregister_notify - Unregister notifier callback for EC events. + * @ec: Yoga C630 EC + * @nb: Notifier block pointer to unregister + * + * Unregister a notifier callback that was previously registered with + * yoga_c630_ec_register_notify(). + */ +void yoga_c630_ec_unregister_notify(struct yoga_c630_ec *ec, struct notifier_block *nb) +{ + blocking_notifier_chain_unregister(&ec->notifier_list, nb); +} +EXPORT_SYMBOL_GPL(yoga_c630_ec_unregister_notify); + +static void yoga_c630_aux_release(struct device *dev) +{ + struct auxiliary_device *adev = to_auxiliary_dev(dev); + + kfree(adev); +} + +static void yoga_c630_aux_remove(void *data) +{ + struct auxiliary_device *adev = data; + + auxiliary_device_delete(adev); + auxiliary_device_uninit(adev); +} + +static int yoga_c630_aux_init(struct device *parent, const char *name, + struct yoga_c630_ec *ec) +{ + struct auxiliary_device *adev; + int ret; + + adev = kzalloc(sizeof(*adev), GFP_KERNEL); + if (!adev) + return -ENOMEM; + + adev->name = name; + adev->id = 0; + adev->dev.parent = parent; + adev->dev.release = yoga_c630_aux_release; + adev->dev.platform_data = ec; + + ret = auxiliary_device_init(adev); + if (ret) { + kfree(adev); + return ret; + } + + ret = auxiliary_device_add(adev); + if (ret) { + auxiliary_device_uninit(adev); + return ret; + } + + return devm_add_action_or_reset(parent, yoga_c630_aux_remove, adev); +} + +static int yoga_c630_ec_probe(struct i2c_client *client) +{ + struct yoga_c630_ec *ec; + struct device *dev = &client->dev; + int ret; + + ec = devm_kzalloc(dev, sizeof(*ec), GFP_KERNEL); + if (!ec) + return -ENOMEM; + + mutex_init(&ec->lock); + ec->client = client; + BLOCKING_INIT_NOTIFIER_HEAD(&ec->notifier_list); + + 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"); + + ret = yoga_c630_aux_init(dev, YOGA_C630_DEV_PSY, ec); + if (ret) + return ret; + + return yoga_c630_aux_init(dev, YOGA_C630_DEV_UCSI, ec); +} + + +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 Embedded Controller"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/platform_data/lenovo-yoga-c630.h b/include/linux/platform_data/lenovo-yoga-c630.h new file mode 100644 index 000000000000..2b893dbeb124 --- /dev/null +++ b/include/linux/platform_data/lenovo-yoga-c630.h @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2024, Linaro Ltd + * Authors: + * Bjorn Andersson + * Dmitry Baryshkov + */ + +#ifndef _LENOVO_YOGA_C630_DATA_H +#define _LENOVO_YOGA_C630_DATA_H + +struct yoga_c630_ec; + +#define YOGA_C630_MOD_NAME "lenovo_yoga_c630" + +#define YOGA_C630_DEV_UCSI "ucsi" +#define YOGA_C630_DEV_PSY "psy" + +int yoga_c630_ec_read8(struct yoga_c630_ec *ec, u8 addr); +int yoga_c630_ec_read16(struct yoga_c630_ec *ec, u8 addr); + +int yoga_c630_ec_register_notify(struct yoga_c630_ec *ec, struct notifier_block *nb); +void yoga_c630_ec_unregister_notify(struct yoga_c630_ec *ec, struct notifier_block *nb); + +#define YOGA_C630_UCSI_WRITE_SIZE 8 +#define YOGA_C630_UCSI_CCI_SIZE 4 +#define YOGA_C630_UCSI_DATA_SIZE 16 +#define YOGA_C630_UCSI_READ_SIZE (YOGA_C630_UCSI_CCI_SIZE + YOGA_C630_UCSI_DATA_SIZE) +u16 yoga_c630_ec_ucsi_get_version(struct yoga_c630_ec *ec); +int yoga_c630_ec_ucsi_write(struct yoga_c630_ec *ec, + const u8 req[YOGA_C630_UCSI_WRITE_SIZE]); +int yoga_c630_ec_ucsi_read(struct yoga_c630_ec *ec, + u8 resp[YOGA_C630_UCSI_READ_SIZE]); + +#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 + +#endif