From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpbguseast3.qq.com (smtpbguseast3.qq.com [54.243.244.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 35669350A3B; Tue, 11 Nov 2025 10:51:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.243.244.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762858274; cv=none; b=hOzxs02wC0OKM8Bsq/k2mwCASuOiX0pdd1nGsF5+X7Q0PE+edhn+U+PaW9EDYKARQUGqH/pwnolX/HLRfRoaX1DBEeQbE7xgftDTYSksx/iDKKKXIdBesuadM6AT2zxpDpsSOcPh3Hjf+pdC7xoGW4kfXVOrJTlF/Kfuz0Jczzw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762858274; c=relaxed/simple; bh=Hph8zBRgkEl5bsXHuqo9OKoVbkY7ij5bPY5xAR4Aii8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; b=mm04R3XUzrOftgVi0QHQgoCiEGIbrfmP6cMZvPGwa3qoP2wPxgo3w0czAoul1LxVGmosii986fuCi2Rzy7gu4LcGa0Ww2QiyQzYERmn/1OX9bkVOqDP+vOBRYfGj9Ef24agDlkOLkkiwCUX2ZuyQ3btHFBvUo7Gd+Nh06OpWJUc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=airkyi.com; spf=pass smtp.mailfrom=airkyi.com; dkim=pass (1024-bit key) header.d=airkyi.com header.i=@airkyi.com header.b=Nk+qfpJ9; arc=none smtp.client-ip=54.243.244.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=airkyi.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=airkyi.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=airkyi.com header.i=@airkyi.com header.b="Nk+qfpJ9" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=airkyi.com; s=altu2504; t=1762858257; bh=3KVgbAMLqk9xskfSyH7zcOVwcHIfJ+/kd/q1XTa1m00=; h=From:To:Subject:Date:Message-Id; b=Nk+qfpJ9ewTcExuBBLpwLuALH30SowqFYwlZAP3IDc65zssyvPZqE8/6CxTOHG3cb 2K2nRKVwhJ6iZUnYAG1PocXYwxOehgxHvFyWgvTQ8VB45MtXdsR7rh/nsNmyEgUrSn yR7g1H7S55xBdUFKVbARuQByF7B8rTr5YbPgJkMM= X-QQ-mid: zesmtpsz9t1762858252t9993007f X-QQ-Originating-IP: QIEzzurO6Fp6z4rwWPRwhcxu3akUrwReXd3stTEf5Lk= Received: from DESKTOP-8BT1A2O.localdomain ( [58.22.7.114]) by bizesmtp.qq.com (ESMTP) with id ; Tue, 11 Nov 2025 18:50:49 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 9719519489223886703 From: Chaoyi Chen To: Heikki Krogerus , Greg Kroah-Hartman , Dmitry Baryshkov , Peter Chen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Vinod Koul , Kishon Vijay Abraham I , Heiko Stuebner , Sandy Huang , Andy Yan , Yubing Zhang , Frank Wang , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Amit Sunil Dhamne , Chaoyi Chen , Dragan Simic , Johan Jonker , Diederik de Haas , Peter Robinson Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, dri-devel@lists.freedesktop.org Subject: [PATCH v9 01/10] usb: typec: Add notifier functions Date: Tue, 11 Nov 2025 18:50:31 +0800 Message-Id: <20251111105040.94-2-kernel@airkyi.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20251111105040.94-1-kernel@airkyi.com> References: <20251111105040.94-1-kernel@airkyi.com> X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpsz:airkyi.com:qybglogicsvrgz:qybglogicsvrgz6b-0 X-QQ-XMAILINFO: NSXtYWcyD5KOJ/WAmZMlCfNWBjpTa1WtLqaVQ8wXYopUPgZro2Xon46a XS9sJ99VaNFd72j7fNEVg77lMGY6B4XZKcgA89oNgHqGgJ6SZcKuKCCwjv/NOJFqkq6zxrI udyDOrw62QiytuHHy5kNFc9BzSyKqrPsVKtvIdg5tUs2aNhkVqaL8BNqtd7lTAvXXuOUFUj cpVnX+LeeaVJfXMDo9cuLTrokssIka8xdlzPoiIkQRKtOopmH79CiPYGyfueJxvINp+8EA8 y6o8uXInQfJZDZx+DWzXB2zAhFJBo5trnsk6DAINhaeimno2uAG+a7dm/5ESDLrG8+X7PrV 4QejTTEdG+jcKmce4XJTuK+xGhmxlOe5c0/16QaTK7Zr8IHLr2Mf/E3xPwkLo7g0/35KO6p lpArGBBw8A60RG9dTW60oYP//orUmch6137Teobu2An7Kc/aPXM9+PSiF+FL2Fr28Eved1P XHlPEUyzTC0TnX+XIQeCYjJCgzGYyxiFYPs9Ky2zCmMP8oSTGsEnMLhsX+PF0JcwKkPOnlX 3IaRc4FRMi+JdsX5md1SI7nRuKUDXzU8736R5so2TOGRdmGRbnDV3UdeL4RZ8wagqyRer/P x7p+mLSeR0G6EdF5/Jvjy377MM5E5SiSQZ0TsTojBe8lbUAI5ID0vtk7peKFPuGlh7fXxwo tu1azXCqusTpfhHZAO8ByVDCtNhjqwZZzyPp0FplK8hozV7/gfnsUi72Re8mLOOJLE5hk23 gqlgCEjpEmUH1dxkK6LWctjyblVUb9VwGdMznFeifY3FpsRoUBy5evhgUGBtve4fO/unaZl n9aAkvHfkY8YSvtNMpexAUOeA3tCF+O79H/W7vkWh+KpYJVau/sMB89LRtVUNo29AByCQze +R8mG2OFSQQ9dvwfv8q6MoJ+w3BVjEShmC3gyswUuvj5mPzvceWLgKF925LU0h6rbpeEF+F nJniIo+PaThCj8KDrwAXau+YEjMaf2kR3X3amp2BBaEJ92M+XclXeQjSlBOpJypkcOsM= X-QQ-XMRINFO: MPJ6Tf5t3I/ycC2BItcBVIA= X-QQ-RECHKSPAM: 0 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: From: Chaoyi Chen Some other part of kernel may want to know the event of typec bus. This patch add common notifier function to notify these event. Signed-off-by: Chaoyi Chen --- Changes in v9: - Remove redundant header files. Changes in v8: - Fix coding style. drivers/usb/typec/Makefile | 2 +- drivers/usb/typec/bus.h | 2 ++ drivers/usb/typec/class.c | 2 ++ drivers/usb/typec/notify.c | 23 +++++++++++++++++++++++ include/linux/usb/typec_altmode.h | 9 +++++++++ 5 files changed, 37 insertions(+), 1 deletion(-) create mode 100644 drivers/usb/typec/notify.c diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile index 7a368fea61bc..20d09c5314d7 100644 --- a/drivers/usb/typec/Makefile +++ b/drivers/usb/typec/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_TYPEC) += typec.o -typec-y := class.o mux.o bus.o pd.o retimer.o +typec-y := class.o mux.o notify.o bus.o pd.o retimer.o typec-$(CONFIG_ACPI) += port-mapper.o obj-$(CONFIG_TYPEC) += altmodes/ obj-$(CONFIG_TYPEC_TCPM) += tcpm/ diff --git a/drivers/usb/typec/bus.h b/drivers/usb/typec/bus.h index 643b8c81786d..820b59b6d434 100644 --- a/drivers/usb/typec/bus.h +++ b/drivers/usb/typec/bus.h @@ -26,6 +26,8 @@ struct altmode { struct altmode *plug[2]; }; +void typec_notify_event(unsigned long event, void *data); + #define to_altmode(d) container_of(d, struct altmode, adev) extern const struct bus_type typec_bus; diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index 9b2647cb199b..9d2aa3dd3f56 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -600,6 +600,8 @@ typec_register_altmode(struct device *parent, return ERR_PTR(ret); } + typec_notify_event(TYPEC_ALTMODE_REGISTERED, &alt->adev); + return &alt->adev; } diff --git a/drivers/usb/typec/notify.c b/drivers/usb/typec/notify.c new file mode 100644 index 000000000000..9e50b54da359 --- /dev/null +++ b/drivers/usb/typec/notify.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0 +#include + +#include "bus.h" + +static BLOCKING_NOTIFIER_HEAD(typec_notifier_list); + +int typec_altmode_register_notify(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&typec_notifier_list, nb); +} +EXPORT_SYMBOL_GPL(typec_altmode_register_notify); + +int typec_altmode_unregister_notify(struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&typec_notifier_list, nb); +} +EXPORT_SYMBOL_GPL(typec_altmode_unregister_notify); + +void typec_notify_event(unsigned long event, void *data) +{ + blocking_notifier_call_chain(&typec_notifier_list, event, data); +} diff --git a/include/linux/usb/typec_altmode.h b/include/linux/usb/typec_altmode.h index f7db3bd4c90e..59e20702504b 100644 --- a/include/linux/usb/typec_altmode.h +++ b/include/linux/usb/typec_altmode.h @@ -10,6 +10,7 @@ #define MODE_DISCOVERY_MAX 6 struct typec_altmode_ops; +struct notifier_block; /** * struct typec_altmode - USB Type-C alternate mode device @@ -77,6 +78,14 @@ int typec_altmode_notify(struct typec_altmode *altmode, unsigned long conf, const struct typec_altmode * typec_altmode_get_partner(struct typec_altmode *altmode); +enum usb_typec_event { + TYPEC_ALTMODE_REGISTERED, + TYPEC_ALTMODE_UNREGISTERED, +}; + +int typec_altmode_register_notify(struct notifier_block *nb); +int typec_altmode_unregister_notify(struct notifier_block *nb); + /** * struct typec_cable_ops - Cable alternate mode operations vector * @enter: Operations to be executed with Enter Mode Command -- 2.51.1