Allows userspace to check supported by the controller/device functionality, e.g. write booster. Signed-off-by: Daniil Lunev <dlunev@xxxxxxxxxxxx> --- drivers/ufs/core/ufs-sysfs.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c index 0a088b47d5570..b0c294c367519 100644 --- a/drivers/ufs/core/ufs-sysfs.c +++ b/drivers/ufs/core/ufs-sysfs.c @@ -254,6 +254,14 @@ static ssize_t wb_on_store(struct device *dev, struct device_attribute *attr, return res < 0 ? res : count; } +static ssize_t caps_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct ufs_hba *hba = dev_get_drvdata(dev); + + return sysfs_emit(buf, "0x%08llx\n", hba->caps); +} + static DEVICE_ATTR_RW(rpm_lvl); static DEVICE_ATTR_RO(rpm_target_dev_state); static DEVICE_ATTR_RO(rpm_target_link_state); @@ -262,6 +270,7 @@ static DEVICE_ATTR_RO(spm_target_dev_state); static DEVICE_ATTR_RO(spm_target_link_state); static DEVICE_ATTR_RW(auto_hibern8); static DEVICE_ATTR_RW(wb_on); +static DEVICE_ATTR_RO(caps); static struct attribute *ufs_sysfs_ufshcd_attrs[] = { &dev_attr_rpm_lvl.attr, @@ -272,6 +281,7 @@ static struct attribute *ufs_sysfs_ufshcd_attrs[] = { &dev_attr_spm_target_link_state.attr, &dev_attr_auto_hibern8.attr, &dev_attr_wb_on.attr, + &dev_attr_caps.attr, NULL }; -- 2.31.0