From 02414bf286e4ff6a08d19e951bff1e0905d330b4 Mon Sep 17 00:00:00 2001 From: Mihail Zenkov Date: Sat, 27 Sep 2014 23:58:51 +0200 Subject: 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 Tested: Michael Giacomelli --- docs/CREDITS | 1 + firmware/target/arm/usb-s3c6400x.c | 6 ++++++ 2 files changed, 7 insertions(+) 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) -- cgit v1.2.3