From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 E5C2C6F2FE; Thu, 12 Dec 2024 15:37:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734017850; cv=none; b=pND8nayPxuqiX/W/imBjtmVMtCTu78/XIVKDJdSgqfNatngDiLNwQbjPxBfLxmi7XP6CImHyKiBokjQnpAoQMk3pQwTsT3Yy0nL0HHIVes2zGg7+ulDLf0d1MN3RZVuLWy7k96nGUJv2ZGE157H7tz0yhmtoWid/okFRFlpDhcM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734017850; c=relaxed/simple; bh=xVN9IJ7uIdT/29KFG1B4sygXXIgPBPDyXQoa/4L2kH8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aIY4LDnfNs+q1SxXrCu6STAf8ox6LYflQe4oUqjIYEnCw9SLuyR2iSaLFwCVK15e4ej2+xeT2vb6hwyX3oukMs1EJLax1hT5f40yjkPLaMpk8pd0epKuz0G7PN94sHfXLXjLj9swul2+ObtM3UlExLKv8hjOj+FBGq/hTXgI3AE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Gg52GIZG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Gg52GIZG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 636A9C4CECE; Thu, 12 Dec 2024 15:37:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1734017849; bh=xVN9IJ7uIdT/29KFG1B4sygXXIgPBPDyXQoa/4L2kH8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Gg52GIZGuBfHbl8Xgu+xIZoZyegjKb68XxFv1uVMhOIy6WojF/PktZIyoBthlJSq7 kGkQlS0kryCcDMDKsK9BypNcr1iAG9kNFxsI4zN4+81POsC+LgrPHGO82mSvPrywGU 6G7cefQGBgJMEfhkAKzkGhld2AD1Lr48MY/c5olc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Frank Li , Alexandre Belloni , Sasha Levin Subject: [PATCH 6.6 098/356] i3c: master: add enable(disable) hot join in sys entry Date: Thu, 12 Dec 2024 15:56:57 +0100 Message-ID: <20241212144248.490683506@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241212144244.601729511@linuxfoundation.org> References: <20241212144244.601729511@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Frank Li [ Upstream commit 317bacf960a4879af22d12175f47d284930b3273 ] Add hotjoin entry in sys file system allow user enable/disable hotjoin feature. Add (*enable(disable)_hotjoin)() to i3c_master_controller_ops. Add api i3c_master_enable(disable)_hotjoin(); Signed-off-by: Frank Li Link: https://lore.kernel.org/r/20231201222532.2431484-2-Frank.Li@nxp.com Signed-off-by: Alexandre Belloni Stable-dep-of: 25bc99be5fe5 ("i3c: master: svc: Modify enabled_events bit 7:0 to act as IBI enable counter") Signed-off-by: Sasha Levin --- drivers/i3c/master.c | 83 ++++++++++++++++++++++++++++++++++++++ include/linux/i3c/master.h | 5 +++ 2 files changed, 88 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 70d120dfb0908..bbd5dc89be229 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -526,6 +526,88 @@ static ssize_t i2c_scl_frequency_show(struct device *dev, } static DEVICE_ATTR_RO(i2c_scl_frequency); +static int i3c_set_hotjoin(struct i3c_master_controller *master, bool enable) +{ + int ret; + + if (!master || !master->ops) + return -EINVAL; + + if (!master->ops->enable_hotjoin || !master->ops->disable_hotjoin) + return -EINVAL; + + i3c_bus_normaluse_lock(&master->bus); + + if (enable) + ret = master->ops->enable_hotjoin(master); + else + ret = master->ops->disable_hotjoin(master); + + master->hotjoin = enable; + + i3c_bus_normaluse_unlock(&master->bus); + + return ret; +} + +static ssize_t hotjoin_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct i3c_bus *i3cbus = dev_to_i3cbus(dev); + int ret; + bool res; + + if (!i3cbus->cur_master) + return -EINVAL; + + if (kstrtobool(buf, &res)) + return -EINVAL; + + ret = i3c_set_hotjoin(i3cbus->cur_master->common.master, res); + if (ret) + return ret; + + return count; +} + +/* + * i3c_master_enable_hotjoin - Enable hotjoin + * @master: I3C master object + * + * Return: a 0 in case of success, an negative error code otherwise. + */ +int i3c_master_enable_hotjoin(struct i3c_master_controller *master) +{ + return i3c_set_hotjoin(master, true); +} +EXPORT_SYMBOL_GPL(i3c_master_enable_hotjoin); + +/* + * i3c_master_disable_hotjoin - Disable hotjoin + * @master: I3C master object + * + * Return: a 0 in case of success, an negative error code otherwise. + */ +int i3c_master_disable_hotjoin(struct i3c_master_controller *master) +{ + return i3c_set_hotjoin(master, false); +} +EXPORT_SYMBOL_GPL(i3c_master_disable_hotjoin); + +static ssize_t hotjoin_show(struct device *dev, struct device_attribute *da, char *buf) +{ + struct i3c_bus *i3cbus = dev_to_i3cbus(dev); + ssize_t ret; + + i3c_bus_normaluse_lock(i3cbus); + ret = sysfs_emit(buf, "%d\n", i3cbus->cur_master->common.master->hotjoin); + i3c_bus_normaluse_unlock(i3cbus); + + return ret; +} + +static DEVICE_ATTR_RW(hotjoin); + static struct attribute *i3c_masterdev_attrs[] = { &dev_attr_mode.attr, &dev_attr_current_master.attr, @@ -536,6 +618,7 @@ static struct attribute *i3c_masterdev_attrs[] = { &dev_attr_pid.attr, &dev_attr_dynamic_address.attr, &dev_attr_hdrcap.attr, + &dev_attr_hotjoin.attr, NULL, }; ATTRIBUTE_GROUPS(i3c_masterdev); diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index 0b52da4f23467..65b8965968af2 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -452,6 +452,8 @@ struct i3c_master_controller_ops { int (*disable_ibi)(struct i3c_dev_desc *dev); void (*recycle_ibi_slot)(struct i3c_dev_desc *dev, struct i3c_ibi_slot *slot); + int (*enable_hotjoin)(struct i3c_master_controller *master); + int (*disable_hotjoin)(struct i3c_master_controller *master); }; /** @@ -487,6 +489,7 @@ struct i3c_master_controller { const struct i3c_master_controller_ops *ops; unsigned int secondary : 1; unsigned int init_done : 1; + unsigned int hotjoin: 1; struct { struct list_head i3c; struct list_head i2c; @@ -543,6 +546,8 @@ int i3c_master_register(struct i3c_master_controller *master, const struct i3c_master_controller_ops *ops, bool secondary); void i3c_master_unregister(struct i3c_master_controller *master); +int i3c_master_enable_hotjoin(struct i3c_master_controller *master); +int i3c_master_disable_hotjoin(struct i3c_master_controller *master); /** * i3c_dev_get_master_data() - get master private data attached to an I3C -- 2.43.0