[PATCH 2/6] usb: chipidea: usb2: add optional reset support

[Junzhong Pan]

On 8/13/2026 5:55 PM, Peter Chen wrote:
> On 26-08-12 17:26:13, Junzhong Pan wrote:
>> The USB2 controller of SpacemiT K1 SoC requires reset support, to keep
>> compatibility, add optional reset support.
>>
>> Signed-off-by: Junzhong Pan <panjunzhong at linux.spacemit.com>
>> ---
>>  drivers/usb/chipidea/ci_hdrc_usb2.c | 8 ++++++++
>>  1 file changed, 8 insertions(+)
>>
>> diff --git a/drivers/usb/chipidea/ci_hdrc_usb2.c b/drivers/usb/chipidea/ci_hdrc_usb2.c
>> index 8ffa1e95d8e8..00d575cd2955 100644
>> --- a/drivers/usb/chipidea/ci_hdrc_usb2.c
>> +++ b/drivers/usb/chipidea/ci_hdrc_usb2.c
>> @@ -12,6 +12,7 @@
>>  #include <linux/phy/phy.h>
>>  #include <linux/platform_device.h>
>>  #include <linux/property.h>
>> +#include <linux/reset.h>
>>  #include <linux/usb/chipidea.h>
>>  #include <linux/usb/hcd.h>
>>  #include <linux/usb/ulpi.h>
>> @@ -21,6 +22,7 @@
>>  struct ci_hdrc_usb2_priv {
>>  	struct platform_device	*ci_pdev;
>>  	struct clk		*clk;
>> +	struct reset_control	*reset;
>>  };
>>  
>>  static const struct ci_hdrc_platform_data ci_default_pdata = {
>> @@ -80,6 +82,12 @@ static int ci_hdrc_usb2_probe(struct platform_device *pdev)
>>  		return ret;
>>  	}
>>  
>> +	priv->reset = devm_reset_control_get_optional_exclusive_deasserted(dev, NULL);
>> +	if (IS_ERR(priv->reset)) {
>> +		ret = PTR_ERR(priv->reset);
>> +		goto clk_err;
>> +	}
>> +
> 
> You may update binding doc?
> 

Sure, I forgot it, will do in v2.

Thanks.

> Acked-by: Peter Chen <peter.chen at kernel.com>
> 
> Peter
>>  	ci_pdata->name = dev_name(dev);
>>  
>>  	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,
>>
>> -- 
>> 2.34.1
>>
>