From: Frank Li <Frank.Li@nxp.com> To: miquel.raynal@bootlin.com Cc: Frank.li@nxp.com, alexandre.belloni@bootlin.com, conor.culhane@silvaco.com, imx@lists.linux.dev, joe@perches.com, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, zbigniew.lukwinski@linux.intel.com Subject: [v5 resend 1/6] i3c: master: add enable(disable) hot join in sys entry Date: Fri, 1 Dec 2023 17:25:27 -0500 [thread overview] Message-ID: <20231201222532.2431484-2-Frank.Li@nxp.com> (raw) In-Reply-To: <20231201222532.2431484-1-Frank.Li@nxp.com> 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 <Frank.Li@nxp.com> --- Notes: Change from v4 to v5 - using kstrtobool() > + if (!master || > + !master->ops || > + !master->ops->enable_hotjoin || > + !master->ops->disable_hotjoin > + ) break into two if, which will be more clear. and one line is 101 chars. Change from v3 to v4 -none Change from v1 to v2. - Hotjoin control by sys entry, default enable hotjoin, which standard i3c feature, user can disable by echo 0 > /sys/bus/i3c/i3c-0/hotjoin 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 08aeb69a78003..d3b56c9f601e2 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 -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Frank Li <Frank.Li@nxp.com> To: miquel.raynal@bootlin.com Cc: Frank.li@nxp.com, alexandre.belloni@bootlin.com, conor.culhane@silvaco.com, imx@lists.linux.dev, joe@perches.com, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, zbigniew.lukwinski@linux.intel.com Subject: [v5 resend 1/6] i3c: master: add enable(disable) hot join in sys entry Date: Fri, 1 Dec 2023 17:25:27 -0500 [thread overview] Message-ID: <20231201222532.2431484-2-Frank.Li@nxp.com> (raw) In-Reply-To: <20231201222532.2431484-1-Frank.Li@nxp.com> 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 <Frank.Li@nxp.com> --- Notes: Change from v4 to v5 - using kstrtobool() > + if (!master || > + !master->ops || > + !master->ops->enable_hotjoin || > + !master->ops->disable_hotjoin > + ) break into two if, which will be more clear. and one line is 101 chars. Change from v3 to v4 -none Change from v1 to v2. - Hotjoin control by sys entry, default enable hotjoin, which standard i3c feature, user can disable by echo 0 > /sys/bus/i3c/i3c-0/hotjoin 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 08aeb69a78003..d3b56c9f601e2 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 -- 2.34.1 -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c
next prev parent reply other threads:[~2023-12-01 22:26 UTC|newest] Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-12-01 22:25 [v5 resend 0/6] i3c: master: some improvment for i3c master Frank Li 2023-12-01 22:25 ` Frank Li 2023-12-01 22:25 ` Frank Li [this message] 2023-12-01 22:25 ` [v5 resend 1/6] i3c: master: add enable(disable) hot join in sys entry Frank Li 2023-12-01 22:25 ` [v5 resend 2/6] i3c: master: svc: add hot join support Frank Li 2023-12-01 22:25 ` Frank Li 2023-12-01 22:25 ` [v5 resend 3/6] i3c: add actual_len in i3c_priv_xfer Frank Li 2023-12-01 22:25 ` Frank Li 2023-12-20 1:51 ` Joshua Yeong 2023-12-20 1:55 ` Joshua Yeong 2023-12-20 1:55 ` Joshua Yeong 2023-12-20 20:55 ` Frank Li 2023-12-20 20:55 ` Frank Li 2023-12-01 22:25 ` [v5 resend 4/6] i3c: master: svc: rename read_len as actual_len Frank Li 2023-12-01 22:25 ` Frank Li 2023-12-01 22:25 ` [v5 resend 5/6] i3c: master: svc: return actual transfer data len Frank Li 2023-12-01 22:25 ` Frank Li 2023-12-01 22:25 ` [v5 resend 6/6] i3c: add API i3c_dev_gettstatus_format1() to get target device status Frank Li 2023-12-01 22:25 ` Frank Li 2023-12-19 16:29 ` [v5 resend 0/6] i3c: master: some improvment for i3c master Frank Li 2023-12-19 16:29 ` Frank Li 2024-01-08 0:03 ` (subset) " Alexandre Belloni 2024-01-08 0:03 ` Alexandre Belloni 2024-01-09 1:19 ` Frank Li 2024-01-09 1:19 ` Frank Li 2024-01-09 7:35 ` Alexandre Belloni 2024-01-09 7:35 ` Alexandre Belloni
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20231201222532.2431484-2-Frank.Li@nxp.com \ --to=frank.li@nxp.com \ --cc=alexandre.belloni@bootlin.com \ --cc=conor.culhane@silvaco.com \ --cc=imx@lists.linux.dev \ --cc=joe@perches.com \ --cc=linux-i3c@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=miquel.raynal@bootlin.com \ --cc=zbigniew.lukwinski@linux.intel.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.