Merging upstream version 6.9.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/drivers/ufs/core/ufs-sysfs.c b/drivers/ufs/core/ufs-sysfs.c
index e6d12289e0..3d049967f6 100644
--- a/drivers/ufs/core/ufs-sysfs.c
+++ b/drivers/ufs/core/ufs-sysfs.c
@@ -405,6 +405,53 @@ static ssize_t wb_flush_threshold_store(struct device *dev,
 	return count;
 }
 
+/**
+ * pm_qos_enable_show - sysfs handler to show pm qos enable value
+ * @dev: device associated with the UFS controller
+ * @attr: sysfs attribute handle
+ * @buf: buffer for sysfs file
+ *
+ * Print 1 if PM QoS feature is enabled, 0 if disabled.
+ *
+ * Returns number of characters written to @buf.
+ */
+static ssize_t pm_qos_enable_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct ufs_hba *hba = dev_get_drvdata(dev);
+
+	return sysfs_emit(buf, "%d\n", hba->pm_qos_enabled);
+}
+
+/**
+ * pm_qos_enable_store - sysfs handler to store value
+ * @dev: device associated with the UFS controller
+ * @attr: sysfs attribute handle
+ * @buf: buffer for sysfs file
+ * @count: stores buffer characters count
+ *
+ * Input 0 to disable PM QoS and 1 value to enable.
+ * Default state: 1
+ *
+ * Return: number of characters written to @buf on success, < 0 upon failure.
+ */
+static ssize_t pm_qos_enable_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct ufs_hba *hba = dev_get_drvdata(dev);
+	bool value;
+
+	if (kstrtobool(buf, &value))
+		return -EINVAL;
+
+	if (value)
+		ufshcd_pm_qos_init(hba);
+	else
+		ufshcd_pm_qos_exit(hba);
+
+	return count;
+}
+
 static DEVICE_ATTR_RW(rpm_lvl);
 static DEVICE_ATTR_RO(rpm_target_dev_state);
 static DEVICE_ATTR_RO(rpm_target_link_state);
@@ -416,6 +463,7 @@ static DEVICE_ATTR_RW(wb_on);
 static DEVICE_ATTR_RW(enable_wb_buf_flush);
 static DEVICE_ATTR_RW(wb_flush_threshold);
 static DEVICE_ATTR_RW(rtc_update_ms);
+static DEVICE_ATTR_RW(pm_qos_enable);
 
 static struct attribute *ufs_sysfs_ufshcd_attrs[] = {
 	&dev_attr_rpm_lvl.attr,
@@ -429,6 +477,7 @@ static struct attribute *ufs_sysfs_ufshcd_attrs[] = {
 	&dev_attr_enable_wb_buf_flush.attr,
 	&dev_attr_wb_flush_threshold.attr,
 	&dev_attr_rtc_update_ms.attr,
+	&dev_attr_pm_qos_enable.attr,
 	NULL
 };