[PATCH v7 6/7] i3c: master: sysfs key for acquire bus

[Parshuram Thombare]

Added support to acquire I3C bus through sysfs interface.

Signed-off-by: Parshuram Thombare <pthom...@cadence.com>
---
 drivers/i3c/master.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index ea53fadeed99..ec27196e987c 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -607,6 +607,23 @@ static ssize_t i2c_scl_frequency_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(i2c_scl_frequency);
 
+static ssize_t i3c_acquire_bus_store(struct device *dev,
+                                    struct device_attribute *attr,
+                                    const char *buf, size_t count)
+{
+       struct i3c_master_controller *master = dev_to_i3cmaster(dev);
+       int ret;
+
+       i3c_bus_normaluse_lock(&master->bus);
+       ret = i3c_master_acquire_bus(master);
+       i3c_bus_normaluse_unlock(&master->bus);
+       if (!ret)
+               i3c_master_enable_mr_events(master);
+
+       return ret ?: count;
+}
+static DEVICE_ATTR_WO(i3c_acquire_bus);
+
 static struct attribute *i3c_masterdev_attrs[] = {
        &dev_attr_mode.attr,
        &dev_attr_current_master.attr,
@@ -617,6 +634,7 @@ static struct attribute *i3c_masterdev_attrs[] = {
        &dev_attr_pid.attr,
        &dev_attr_dynamic_address.attr,
        &dev_attr_hdrcap.attr,
+       &dev_attr_i3c_acquire_bus.attr,
        NULL,
 };
 ATTRIBUTE_GROUPS(i3c_masterdev);
-- 
2.17.1