On Fri, 2025-03-14 at 15:55 -0700, Bao D. Nguyen wrote: > > External email : Please do not click links or open attachments until > you have verified the sender or the content. > > > The ufs device JEDEC specification version 4.1 adds support for the > device level exception events. To support this new device level > exception feature, expose two new sysfs nodes below to provide > the user space access to the device level exception information. > /sys/bus/platform/drivers/ufshcd/*/device_lvl_exception_count > /sys/bus/platform/drivers/ufshcd/*/device_lvl_exception_id > > The device_lvl_exception_count sysfs node reports the number of > device level exceptions that have occurred since the last time > this variable is reset. Writing a value of 0 will reset it. > The device_lvl_exception_id reports the exception ID which is the > qDeviceLevelExceptionID attribute of the device JEDEC specifications > version 4.1 and later. The user space application can query these > sysfs nodes to get more information about the device level exception. > > Signed-off-by: Bao D. Nguyen <quic_nguyenb@xxxxxxxxxxx> > --- > Changes in v2: > 1. Addressed Mani's comments: > - Update the documentation of dev_lvl_exception_count to > read/write. > - Rephrase the description of the Documentation and commit text. > - Remove the export of ufshcd_read_device_lvl_exception_id(). > 2. Addressed Bart's comments: > - Rename dev_lvl_exception sysfs node to dev_lvl_exception_count. > - Update the documentation of the sysfs nodes. > - Skip comment about sysfs_notify() being used in interrupt > context because Avri already addressed it. > --- > > Reviewed-by: Peter Wang <peter.wang@xxxxxxxxxxxx>
