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authorMihail Zenkov <Mihail_Zenkov@rockbox.org>2014-09-27 23:58:51 +0200
committerMichael Giacomelli <giac2000@hotmail.com>2014-09-28 21:07:45 +0200
commit02414bf286e4ff6a08d19e951bff1e0905d330b4 (patch)
treea0040c236528b0b71616bef6bd713865e338ab94
parent515a3c50fca3f6e623683dc2c4c77c5b84911b12 (diff)
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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>
-rw-r--r--docs/CREDITS1
-rw-r--r--firmware/target/arm/usb-s3c6400x.c6
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)