From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lf1-f41.google.com (mail-lf1-f41.google.com [209.85.167.41]) (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 404954A386B for ; Mon, 19 Oct 2026 10:04:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.41 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792404295; cv=none; b=Vj57JiDgU4lN53P5lRgFnvBEL7gzdY14+a8+spSaCmoVpKOxm9LuCZyCrCkV8/6XR8R2fE1p+iW+/+drzcQ9vvLBEy0KzvEI/pl5xKQagwNYFkk9QXsU+LSNIImQZsQix+He+AtimjHPTsQ+DiOvudFV5yAoeSi7tg8XqQrPS00= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792404295; c=relaxed/simple; bh=vTbgxdJuUc8bPT6jOJqWQoEAVh5xzYo4Dkan0XX08wk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=RoDMCghMcol1UEozY7y0T4dNCDxHHXmvZB/CR9KleCnVT3dengG9RAt587D5NM31be69ALEc8LC7xtRQvtLgTji2Pd7MW78XaDz5QRzrQ1ch4+fJdXE1xygLI0DOnqkRoJJkBUK3tjNwPEAH+aY9uw82jSG+99a9VEzunWNnG0s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=CBlEWKD9; arc=none smtp.client-ip=209.85.167.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CBlEWKD9" Received: by mail-lf1-f41.google.com with SMTP id 2adb3069b0e04-5be4a2d94adso1503214e87.0 for ; Mon, 19 Oct 2026 03:04:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1792404291; x=1793009091; darn=vger.kernel.org; h=content-transfer-encoding:content-type:mime-version:references :in-reply-to:message-id:date:subject:cc:to:from:from:to:cc:subject :date:message-id:reply-to:content-type; bh=Dgj4UbbyEsyRyIW26kcdyCzSX0/3ndCVzhgrPch3x2A=; b=CBlEWKD95sSCLb0D4Di8M2V/Gs422suPFsBkJ9bfp/UGCSsCmDRwqT/Eb6JLLB1Yj7 SSlx/KS66+bl36L8crLUAiSTcIxuTEarwkGwNnBSTNzy6Oiiwh/yRLvr0KywDJzSUnpy UD50bodAKsNK/DMsw7Lnof9C1rM74DlbUtt/zDx0/bAwOvY7TWSHGUhmM1nM1HdoGfOD tLUbduNoT+00yQaXkZvHi13Hr4YJCMglNl8gvdgfGfGUfebMdioS/mUMnBlin8ty8LTJ +GoXwfak9JxVUqqvzUeqJxZffXm2c55ryyrk14AYDf1Sg3ZPeYszlSKS9RdohuZa60FX 9eTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792404291; x=1793009091; h=content-transfer-encoding:content-type:mime-version:references :in-reply-to:message-id:date:subject:cc:to:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=Dgj4UbbyEsyRyIW26kcdyCzSX0/3ndCVzhgrPch3x2A=; b=UEcPpR9sT1hsTdJrk0HifyrsQsszG6LtM8NcYZISlqDls0izFH/KcVOvkG/J7hL2Wn MfoT8HaHZsPa33btp7XPrHmMftymB6yy3Rl/qTa3IlXVMLjOZBVj8nlIMi5ESIAv0Hnw 3e95x0kjQVks6E23oKqRwKGhdkQTYOqE9msDYybtqYK073vgufbY2G5xuBKCxUBSx760 vAUQHgIBGBwJAyVQW+BT8P/EDBiUIEyrMRcP7UQfLt0f0vg1P8QFSZ+8Q7Gqp4FI6n5w eHmm08dUPOojAVR76Tkj/TM2p8SZjGQjxnWihr/v5/4qqKoRMEuc5BpE3QnMRnKRXKRK qtqQ== X-Gm-Message-State: AFq9FYLMG4tkBGGNd10yi9PYOyafvTlkHvZaWkJFVFJgF3w1EtLOgLXi QwDUJH7zj76m7WyOkPhGKrNHS3he+RUh+oX+P1Q6NVS6Oay/ggbs0OyYCnFw4g== X-Gm-Gg: AYBFou2oSLZFeMC/ikmU7Rkf/+8S+/wAzeKXCwScrmTktsumk8GjSmt+OBMQ3XkpLXO Q1Zu8S/Iy+mzDIHbfXxZbXr5BkWwYUzKeegbcdF5h3Pb4xSeH4DLmi6UvbdJIzhU62dkvurQUzs f9R9y3DELwmKlIc/3cXSWo48v/vZt+n+EOtE+hquqmZwKHFRRO4jh4tTuUeG7ek6cvZv2kZ1vGT 9RnmCvi6rpxUgJGU6jbuypc8uN+/xTm3jiOjSmTBF++ZatAVc8UeMVKHqdrqh87cT3F5GXRFfWK iTHVc4WcAWtAC/SRRmDGoSYZ8kgPem+rIiE5eUkWhvjWCVlGsJ4hiiT+qlzPbC3jBNK727iLKo+ cv2LDC0hgz61/lDe7oYVTsnk/8blJY8Q+p9ZpYCOtBaI5SRcJxiRZkyRs3CRYbcncMjLQo+BmXe hvgs9UUO0iOVsRpAuKoAXPyQ0jptaLsZ5fFa/5mRHRf1lKLZfB2qjwydMHJX+fWSLKg6ryOYCJe G83PmgUJ3prDqL/hyM= X-Received: by 2002:a05:600c:3e85:b0:4a0:25d5:e853 with SMTP id 5b1f17b1804b1-4a1d7631660mr137987405e9.35.1792404278100; Mon, 19 Oct 2026 03:04:38 -0700 (PDT) Received: from xeon ([188.163.112.62]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a1df164777sm177811485e9.5.2026.10.19.03.04.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Oct 2026 03:04:36 -0700 (PDT) From: Svyatoslav Ryhel To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Dmitry Torokhov , Lee Jones , Pavel Machek , Sebastian Reichel , Svyatoslav Ryhel , Ion Agorria , =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= , Florian Krischer Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org, mfd@lists.linux.dev, linux-leds@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v12 7/7] power: supply: Add charger driver for Asus Transformers Date: Mon, 19 Oct 2026 13:04:06 +0300 Message-ID: <20261019100406.103687-8-clamor95@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261019100406.103687-1-clamor95@gmail.com> References: <20261019100406.103687-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Michał Mirosław Add support for charger detection capabilities found in the embedded controller of ASUS Transformer devices. Suggested-by: Maxim Schwalm Suggested-by: Svyatoslav Ryhel Signed-off-by: Michał Mirosław Signed-off-by: Svyatoslav Ryhel Reviewed-by: Sebastian Reichel --- drivers/power/supply/Kconfig | 11 + drivers/power/supply/Makefile | 1 + .../supply/asus-transformer-ec-charger.c | 208 ++++++++++++++++++ 3 files changed, 220 insertions(+) create mode 100644 drivers/power/supply/asus-transformer-ec-charger.c diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 856eb81c97ae9..16d0a38b41b7e 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -508,6 +508,17 @@ config CHARGER_88PM860X help Say Y here to enable charger for Marvell 88PM860x chip. +config CHARGER_ASUS_TRANSFORMER_EC + tristate "Asus Transformer's charger driver" + depends on MFD_ASUS_TRANSFORMER_EC + help + Say Y here to enable support AC plug detection on Asus Transformer + Dock. + + This sub-driver supports charger detection mechanism found in Asus + Transformer tablets and mobile docks and controlled by special + embedded controller. + config CHARGER_PF1550 tristate "NXP PF1550 battery charger driver" depends on MFD_PF1550 diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile index bec4a6263048c..cd3640f4b7480 100644 --- a/drivers/power/supply/Makefile +++ b/drivers/power/supply/Makefile @@ -69,6 +69,7 @@ obj-$(CONFIG_CHARGER_RT9471) += rt9471.o obj-$(CONFIG_CHARGER_RT9756) += rt9756.o obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o +obj-$(CONFIG_CHARGER_ASUS_TRANSFORMER_EC) += asus-transformer-ec-charger.o obj-$(CONFIG_CHARGER_PF1550) += pf1550-charger.o obj-$(CONFIG_BATTERY_RX51) += rx51_battery.o obj-$(CONFIG_AB8500_BM) += ab8500_bmdata.o ab8500_charger.o ab8500_fg.o ab8500_btemp.o ab8500_chargalg.o diff --git a/drivers/power/supply/asus-transformer-ec-charger.c b/drivers/power/supply/asus-transformer-ec-charger.c new file mode 100644 index 0000000000000..c7a6bd2ba533f --- /dev/null +++ b/drivers/power/supply/asus-transformer-ec-charger.c @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include +#include +#include +#include + +struct asus_ec_charger_data { + struct notifier_block nb; + struct asusec_core *ec; + struct power_supply *psy; + struct power_supply_desc psy_desc; +}; + +static enum power_supply_property asus_ec_charger_properties[] = { + POWER_SUPPLY_PROP_USB_TYPE, + POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR, + POWER_SUPPLY_PROP_ONLINE, + POWER_SUPPLY_PROP_MODEL_NAME, +}; + +static int asus_ec_charger_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct asus_ec_charger_data *priv = power_supply_get_drvdata(psy); + enum power_supply_usb_type psu; + int ret; + u64 ctl; + + /* Check if model name is requested first since it needs no hw access */ + if (psp == POWER_SUPPLY_PROP_MODEL_NAME) { + val->strval = priv->ec->model; + return 0; + } + + ret = asus_dockram_access_ctl(priv->ec->dockram, &ctl, 0, 0); + if (ret) + return ret; + + switch (ctl & (ASUSEC_CTL_FULL_POWER_SOURCE | ASUSEC_CTL_DIRECT_POWER_SOURCE)) { + case ASUSEC_CTL_FULL_POWER_SOURCE: + psu = POWER_SUPPLY_USB_TYPE_CDP; /* DOCK */ + break; + case ASUSEC_CTL_DIRECT_POWER_SOURCE: + psu = POWER_SUPPLY_USB_TYPE_SDP; /* USB */ + break; + case 0: + psu = POWER_SUPPLY_USB_TYPE_UNKNOWN; /* no power source connected */ + break; + default: + psu = POWER_SUPPLY_USB_TYPE_ACA; /* power adapter */ + break; + } + + switch (psp) { + case POWER_SUPPLY_PROP_ONLINE: + val->intval = psu != POWER_SUPPLY_USB_TYPE_UNKNOWN; + return 0; + + case POWER_SUPPLY_PROP_USB_TYPE: + val->intval = psu; + return 0; + + case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR: + if (ctl & ASUSEC_CTL_TEST_DISCHARGE) + val->intval = POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE; + else if (ctl & ASUSEC_CTL_USB_CHARGE) + val->intval = POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO; + else + val->intval = POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE; + return 0; + + default: + return -EINVAL; + } +} + +static int asus_ec_charger_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct asus_ec_charger_data *priv = power_supply_get_drvdata(psy); + + switch (psp) { + case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR: + switch ((enum power_supply_charge_behaviour)val->intval) { + case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO: + return asus_dockram_access_ctl(priv->ec->dockram, NULL, + ASUSEC_CTL_TEST_DISCHARGE | ASUSEC_CTL_USB_CHARGE, + ASUSEC_CTL_USB_CHARGE); + + case POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE: + return asus_dockram_access_ctl(priv->ec->dockram, NULL, + ASUSEC_CTL_TEST_DISCHARGE | ASUSEC_CTL_USB_CHARGE, 0); + + case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE: + return asus_dockram_access_ctl(priv->ec->dockram, NULL, + ASUSEC_CTL_TEST_DISCHARGE | ASUSEC_CTL_USB_CHARGE, + ASUSEC_CTL_TEST_DISCHARGE); + default: + return -EINVAL; + } + + default: + return -EINVAL; + } +} + +static int asus_ec_charger_property_is_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + switch (psp) { + case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR: + return true; + default: + return false; + } +} + +static const struct power_supply_desc asus_ec_charger_desc = { + .name = "asus-ec-charger", + .type = POWER_SUPPLY_TYPE_USB, + .charge_behaviours = BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO) | + BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_INHIBIT_CHARGE) | + BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE), + .usb_types = BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN) | + BIT(POWER_SUPPLY_USB_TYPE_SDP) | + BIT(POWER_SUPPLY_USB_TYPE_CDP) | + BIT(POWER_SUPPLY_USB_TYPE_ACA), + .properties = asus_ec_charger_properties, + .num_properties = ARRAY_SIZE(asus_ec_charger_properties), + .get_property = asus_ec_charger_get_property, + .set_property = asus_ec_charger_set_property, + .property_is_writeable = asus_ec_charger_property_is_writeable, + .no_thermal = true, +}; + +static int asus_ec_charger_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct asus_ec_charger_data *priv = + container_of(nb, struct asus_ec_charger_data, nb); + + switch (action) { + case ASUSEC_SMI_ACTION(POWER_NOTIFY): + case ASUSEC_SMI_ACTION(ADAPTER_EVENT): + power_supply_changed(priv->psy); + break; + } + + return NOTIFY_DONE; +} + +static int asus_ec_charger_probe(struct platform_device *pdev) +{ + struct asusec_core *ec = dev_get_drvdata(pdev->dev.parent); + struct asus_ec_charger_data *priv; + struct device *dev = &pdev->dev; + struct power_supply_config cfg = { }; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + platform_set_drvdata(pdev, priv); + priv->ec = ec; + + cfg.fwnode = dev_fwnode(dev->parent); + cfg.drv_data = priv; + + memcpy(&priv->psy_desc, &asus_ec_charger_desc, sizeof(priv->psy_desc)); + priv->psy_desc.name = devm_kasprintf(dev, GFP_KERNEL, "%s-charger", + priv->ec->name); + if (!priv->psy_desc.name) + return -ENOMEM; + + priv->psy = devm_power_supply_register(dev, &priv->psy_desc, &cfg); + if (IS_ERR(priv->psy)) + return dev_err_probe(dev, PTR_ERR(priv->psy), + "Failed to register power supply\n"); + + priv->nb.notifier_call = asus_ec_charger_notify; + + return blocking_notifier_chain_register(&ec->notify_list, &priv->nb); +} + +static void asus_ec_charger_remove(struct platform_device *pdev) +{ + struct asus_ec_charger_data *priv = platform_get_drvdata(pdev); + struct asusec_core *ec = priv->ec; + + blocking_notifier_chain_unregister(&ec->notify_list, &priv->nb); +} + +static struct platform_driver asus_ec_charger_driver = { + .driver.name = "asus-transformer-ec-charger", + .probe = asus_ec_charger_probe, + .remove = asus_ec_charger_remove, +}; +module_platform_driver(asus_ec_charger_driver); + +MODULE_ALIAS("platform:asus-transformer-ec-charger"); +MODULE_AUTHOR("Michał Mirosław "); +MODULE_DESCRIPTION("ASUS Transformer Pad battery charger driver"); +MODULE_LICENSE("GPL"); -- 2.53.0