Make sure the USB PHY is disabled after use. Patch by Mihail Zenkov who has

measured several milliamps power reduction from having the PHY disabled.

Change-Id: I29e55222eb50acf2023ac1113a90612029c580af
Reviewed-on: http://gerrit.rockbox.org/988
Reviewed-by: Michael Giacomelli <giac2000@hotmail.com>
Tested: Michael Giacomelli <giac2000@hotmail.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/docs/CREDITS b/docs/CREDITS
index 4b3b5907fd..96a5b784bd 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -643,6 +643,7 @@ Yifu Huang
 Jonathan Bettencourt
 Ilia Sergachev
 Nial Shui
+Mihail Zenkov
 
 The libmad team
 The wavpack team
diff --git a/firmware/target/arm/usb-s3c6400x.c b/firmware/target/arm/usb-s3c6400x.c
index 48521aa622..af4e564442 100644
--- a/firmware/target/arm/usb-s3c6400x.c
+++ b/firmware/target/arm/usb-s3c6400x.c
@@ -354,6 +354,12 @@ void usb_drv_exit(void)
 
     CGU_USB = 0;
     bitclr32(&CGU_PERI, CGU_USB_CLOCK_ENABLE);
+
+    /* reset USB_PHY to prevent power consumption */
+    CCU_SRC = CCU_SRC_USB_PHY_EN;
+    CCU_SRL = CCU_SRL_MAGIC_NUMBER;
+    CCU_SRL = 0;
+
 }
 #elif CONFIG_CPU == S5L8701 || CONFIG_CPU == S5L8702
 static void usb_reset(void)