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authorStanislav Nijnikov2018-02-15 14:14:10 +0200
committerMartin K. Petersen2018-02-15 18:35:04 -0500
commitd10b2a8ea8fd0d6c8a667dc1950c8c061bfbbcdd (patch)
treebf15871d46ba1a8fc4ace3844512a4308848420e /drivers/scsi/ufs/ufs-sysfs.c
parentd829fc8a1058851f1058b4a29ea02da125c1684a (diff)
scsi: ufs: sysfs: flags
This patch introduces a sysfs group entry for the UFS flags. The group adds "flags" folder under the UFS driver sysfs entry (/sys/bus/platform/drivers/ufshcd/*). The flags are shown as boolean value ("true" or "false"). The full information about the UFS flags could be found at UFS specifications 2.1. Signed-off-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ufs/ufs-sysfs.c')
-rw-r--r--drivers/scsi/ufs/ufs-sysfs.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufs-sysfs.c b/drivers/scsi/ufs/ufs-sysfs.c
index cd4d9d039ee9..a09a8a2ed46c 100644
--- a/drivers/scsi/ufs/ufs-sysfs.c
+++ b/drivers/scsi/ufs/ufs-sysfs.c
@@ -538,6 +538,44 @@ static const struct attribute_group ufs_sysfs_string_descriptors_group = {
.attrs = ufs_sysfs_string_descriptors,
};
+#define UFS_FLAG(_name, _uname) \
+static ssize_t _name##_show(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ bool flag; \
+ struct ufs_hba *hba = dev_get_drvdata(dev); \
+ if (ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_READ_FLAG, \
+ QUERY_FLAG_IDN##_uname, &flag)) \
+ return -EINVAL; \
+ return sprintf(buf, "%s\n", flag ? "true" : "false"); \
+} \
+static DEVICE_ATTR_RO(_name)
+
+UFS_FLAG(device_init, _FDEVICEINIT);
+UFS_FLAG(permanent_wpe, _PERMANENT_WPE);
+UFS_FLAG(power_on_wpe, _PWR_ON_WPE);
+UFS_FLAG(bkops_enable, _BKOPS_EN);
+UFS_FLAG(life_span_mode_enable, _LIFE_SPAN_MODE_ENABLE);
+UFS_FLAG(phy_resource_removal, _FPHYRESOURCEREMOVAL);
+UFS_FLAG(busy_rtc, _BUSY_RTC);
+UFS_FLAG(disable_fw_update, _PERMANENTLY_DISABLE_FW_UPDATE);
+
+static struct attribute *ufs_sysfs_device_flags[] = {
+ &dev_attr_device_init.attr,
+ &dev_attr_permanent_wpe.attr,
+ &dev_attr_power_on_wpe.attr,
+ &dev_attr_bkops_enable.attr,
+ &dev_attr_life_span_mode_enable.attr,
+ &dev_attr_phy_resource_removal.attr,
+ &dev_attr_busy_rtc.attr,
+ &dev_attr_disable_fw_update.attr,
+ NULL,
+};
+
+static const struct attribute_group ufs_sysfs_flags_group = {
+ .name = "flags",
+ .attrs = ufs_sysfs_device_flags,
+};
static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_default_group,
@@ -547,6 +585,7 @@ static const struct attribute_group *ufs_sysfs_groups[] = {
&ufs_sysfs_health_descriptor_group,
&ufs_sysfs_power_descriptor_group,
&ufs_sysfs_string_descriptors_group,
+ &ufs_sysfs_flags_group,
NULL,
};