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Date: Sun, 31 May 2020 09:15:46 +0200 From: Parshuram Thombare <pthombar@...ence.com> To: <bbrezillon@...nel.org>, <vitor.soares@...opsys.com> CC: <pgaj@...ence.com>, <linux-i3c@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <mparab@...ence.com>, <praneeth@...com>, Parshuram Thombare <pthombar@...ence.com> Subject: [PATCH v8 6/7] i3c: master: sysfs key for acquire bus Added support to acquire I3C bus through sysfs interface. Signed-off-by: Parshuram Thombare <pthombar@...ence.com> --- drivers/i3c/master.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index de3cb39df9ff..17c0c9a6099d 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -596,6 +596,23 @@ 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, @@ -606,6 +623,7 @@ 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
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