scsi: ufs: Add sysfs node to dynamically control clock scaling
Provide an option to enable/disable clock scaling during runtime.
Write 1/0 to "clkscale_enable" sysfs node to enable/disable clock
scaling.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 0882ba6..bdd2284 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -342,6 +342,8 @@ struct ufs_clk_scaling {
bool is_busy_started;
unsigned long tot_busy_t;
unsigned long window_start_t;
+ struct device_attribute enable_attr;
+ bool is_allowed;
};
/**
@@ -580,7 +582,7 @@ static inline bool ufshcd_can_hibern8_during_gating(struct ufs_hba *hba)
{
return hba->caps & UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
}
-static inline int ufshcd_is_clkscaling_enabled(struct ufs_hba *hba)
+static inline int ufshcd_is_clkscaling_supported(struct ufs_hba *hba)
{
return hba->caps & UFSHCD_CAP_CLK_SCALING;
}