davinci: rootdir: init.qcom.rc: Tuning UFS clock scaling during boot time

Disabling UFS clock scaling during boot time helps in reducing
IO delays, which helps in reducing the total boot time.
This change will disable UFS clock scaling during early-init and
enable it back after boot completion.

Change-Id: Ib3490a8155610aea399ac2f63aa4a71bee299c6e

rootdir/etc/init.qcom.rc

@@ -44,6 +44,9 @@ on early-init
     # Change ownership of sysfs power control node
     chown system graphics /sys/class/drm/card0/device/power/control
 
+    # Disable UFS clock scaling
+    write /sys/bus/platform/devices/1d84000.ufshc/clkscale_enable 0
+
 on init
     # Create cgroup mount point for memory
     mkdir /sys/fs/cgroup/memory/bg 0750 root system
@@ -221,6 +224,9 @@ on post-fs-data
     setprop vold.post_fs_data_done 1
 
 on property:sys.boot_completed=1
+    # Enable UFS clock scaling back
+    write /sys/bus/platform/devices/1d84000.ufshc/clkscale_enable 1
+
     chown media audio /sys/kernel/wdsp0/boot
 
     start vendor.qcom-post-boot