Re: [PATCH v6 02/12] i3c: master: Use unified device property interface

[Akhil R <akhilrajeev@nvidia.com>]

Hi Adrian,

On Wed, 22 Jul 2026 13:38:43 +0300 Adrian Hunter wrote:
> On 21/07/2026 07:07, Akhil R wrote:
>> Replace all OF-specific functions with unified device property functions
>> as a prerequisite to support both ACPI and device tree.
>> 
>> Reviewed-by: Frank Li <Frank.Li@nxp.com>
>> Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
>> ---
>>  drivers/i3c/master.c       | 77 +++++++++++++++++++++-----------------
>>  include/linux/i3c/master.h |  5 ++-
>>  2 files changed, 46 insertions(+), 36 deletions(-)
>> 
>> diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
>> index f1be38a640ca..4b3d9628bc39 100644
>> --- a/drivers/i3c/master.c
>> +++ b/drivers/i3c/master.c
>> @@ -13,10 +13,12 @@
>>  #include <linux/dma-mapping.h>
>>  #include <linux/err.h>
>>  #include <linux/export.h>
>> +#include <linux/i2c.h>
>>  #include <linux/kernel.h>
>>  #include <linux/list.h>
>>  #include <linux/of.h>
>>  #include <linux/pm_runtime.h>
>> +#include <linux/property.h>
>>  #include <linux/slab.h>
>>  #include <linux/spinlock.h>
>>  #include <linux/workqueue.h>
>> @@ -491,7 +493,7 @@ static void i3c_bus_cleanup(struct i3c_bus *i3cbus)
>>  	mutex_unlock(&i3c_core_lock);
>>  }
>>  
>> -static int i3c_bus_init(struct i3c_bus *i3cbus, struct device_node *np)
>> +static int i3c_bus_init(struct i3c_bus *i3cbus, struct fwnode_handle *fwnode)
>>  {
>>  	int ret, start, end, id = -1;
>>  
>> @@ -501,8 +503,8 @@ static int i3c_bus_init(struct i3c_bus *i3cbus, struct device_node *np)
>>  	i3c_bus_init_addrslots(i3cbus);
>>  	i3cbus->mode = I3C_BUS_MODE_PURE;
>>  
>> -	if (np)
>> -		id = of_alias_get_id(np, "i3c");
>> +	if (fwnode && is_of_node(fwnode))
>> +		id = of_alias_get_id(to_of_node(fwnode), "i3c");
>>  
>>  	mutex_lock(&i3c_core_lock);
>>  	if (id >= 0) {
>> @@ -837,7 +839,7 @@ static void i3c_masterdev_release(struct device *dev)
>>  	WARN_ON(!list_empty(&bus->devs.i2c) || !list_empty(&bus->devs.i3c));
>>  	i3c_bus_cleanup(bus);
>>  
>> -	of_node_put(dev->of_node);
>> +	fwnode_handle_put(dev->fwnode);
>>  }
>>  
>>  static const struct device_type i3c_masterdev_type = {
>> @@ -1044,7 +1046,7 @@ static void i3c_device_release(struct device *dev)
>>  
>>  	WARN_ON(i3cdev->desc);
>>  
>> -	of_node_put(i3cdev->dev.of_node);
>> +	fwnode_handle_put(dev->fwnode);
>>  	kfree(i3cdev);
>>  }
>>  
>> @@ -1928,7 +1930,7 @@ i3c_master_register_new_i3c_devs(struct i3c_master_controller *master)
>>  			     desc->info.pid);
>>  
>>  		if (desc->boardinfo)
>> -			desc->dev->dev.of_node = desc->boardinfo->of_node;
>> +			device_set_node(&desc->dev->dev, desc->boardinfo->fwnode);
>
> i3c_device_release() "puts" the node so there should be a "get" here.
> Should probably fix that before switching to device properties.
>
> Also seems like the of_node_get() for boardinfo for both i3c and i2c
> has no balancing put.  Again, it would be good to get that sorted out
> before switching to device properties.

Thanks for the review.

I understand the issue of unbalanced get/put, but given the size and
spread of this series, mixing it up with fixes may make it difficult
to review and may dilute its intent. This patch is a 1:1 of_node ->
fwnode conversion and keeps the exact same get/put balance, so it
should not regress anything.

If you agree, the fixes and pre-existing issues can be taken up
separately.

Best Regards,
Akhil

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