target/linux/ramips/patches-3.10/0017-USB-MIPS-ralink-fix-usb-issue-on-mt7620.patch

   1 From 3f40514a51b44171d274ef6a7d66dce9ae7c349d Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Fri, 24 May 2013 21:28:08 +0200
   4 Subject: [PATCH 17/33] USB: MIPS: ralink: fix usb issue on mt7620
   5
   6 USB fails when frequency scaling is enabled. Increase the idle cpu speed when
   7 scaled.
   8
   9 Signed-off-by: John Crispin <blogic@openwrt.org>
  10 ---
  11  arch/mips/include/asm/mach-ralink/mt7620.h |    1 +
  12  arch/mips/ralink/mt7620.c                  |    8 ++++++++
  13  2 files changed, 9 insertions(+)
  14
  15 --- a/arch/mips/include/asm/mach-ralink/mt7620.h
  16 +++ b/arch/mips/include/asm/mach-ralink/mt7620.h
  17 @@ -20,6 +20,7 @@
  18  #define SYSC_REG_CHIP_REV              0x0c
  19  #define SYSC_REG_SYSTEM_CONFIG0                0x10
  20  #define SYSC_REG_SYSTEM_CONFIG1                0x14
  21 +#define SYSC_REG_CPU_SYS_CLKCFG                0x3c
  22  #define SYSC_REG_CPLL_CONFIG0          0x54
  23  #define SYSC_REG_CPLL_CONFIG1          0x58
  24
  25 --- a/arch/mips/ralink/mt7620.c
  26 +++ b/arch/mips/ralink/mt7620.c
  27 @@ -185,6 +185,14 @@ void __init ralink_clk_init(void)
  28         ralink_clk_add("10000500.uart", 40000000);
  29         ralink_clk_add("10000b00.spi", 40000000);
  30         ralink_clk_add("10000c00.uartlite", 40000000);
  31 +
  32 +#ifdef CONFIG_USB
  33 +       /*
  34 +        * When the CPU goes into sleep mode, the BUS clock will be too low for
  35 +        * USB to function properly
  36 +        */
  37 +       rt_sysc_m32(0x1f1f, 0x303, SYSC_REG_CPU_SYS_CLKCFG);
  38 +#endif
  39  }
  40
  41  void __init ralink_of_remap(void)