[target/xburst] level up target xburst to linux kernel version 3.2.1

[openwrt.git] / target / linux / xburst / patches-3.2 / 0014-MIPS-JZ4740-reset-Initialize-hibernate-wakeup-counte.patch

diff --git a/target/linux/xburst/patches-3.2/0014-MIPS-JZ4740-reset-Initialize-hibernate-wakeup-counte.patch b/target/linux/xburst/patches-3.2/0014-MIPS-JZ4740-reset-Initialize-hibernate-wakeup-counte.patch
new file mode 100644 (file)
index 0000000..6a49e35
--- /dev/null
+++ b/target/linux/xburst/patches-3.2/0014-MIPS-JZ4740-reset-Initialize-hibernate-wakeup-counte.patch
@@ -0,0 +1,95 @@
+From 2dcb0ca66d0bffc23d5f001fad81fb1a7a2c371b Mon Sep 17 00:00:00 2001
+From: Maarten ter Huurne <maarten@treewalker.org>
+Date: Tue, 28 Jun 2011 22:28:59 +0200
+Subject: [PATCH 14/21] MIPS: JZ4740: reset: Initialize hibernate wakeup
+ counters.
+
+In hibernation mode only the wakeup logic and the RTC are left running,
+so this is what users perceive as power down.
+
+If the counters are not initialized, the corresponding pin (typically
+connected to the power button) has to be asserted for two seconds
+before the device wakes up. Most users expect a shorter wakeup time.
+
+I took the timing values of 100 ms and 60 ms from BouKiCHi's patch for
+the Dingoo A320 kernel.
+---
+ arch/mips/jz4740/reset.c |   46 ++++++++++++++++++++++++++++++++++++++++------
+ 1 files changed, 40 insertions(+), 6 deletions(-)
+
+diff --git a/arch/mips/jz4740/reset.c b/arch/mips/jz4740/reset.c
+index 5f1fb95..e6d1d7b 100644
+--- a/arch/mips/jz4740/reset.c
++++ b/arch/mips/jz4740/reset.c
+@@ -21,6 +21,9 @@
+ #include <asm/mach-jz4740/base.h>
+ #include <asm/mach-jz4740/timer.h>
+ 
++#include "reset.h"
++#include "clock.h"
++
+ static void jz4740_halt(void)
+ {
+       while (1) {
+@@ -53,21 +56,52 @@ static void jz4740_restart(char *command)
+       jz4740_halt();
+ }
+ 
+-#define JZ_REG_RTC_CTRL               0x00
+-#define JZ_REG_RTC_HIBERNATE  0x20
++#define JZ_REG_RTC_CTRL                       0x00
++#define JZ_REG_RTC_HIBERNATE          0x20
++#define JZ_REG_RTC_WAKEUP_FILTER      0x24
++#define JZ_REG_RTC_RESET_COUNTER      0x28
+ 
+-#define JZ_RTC_CTRL_WRDY      BIT(7)
++#define JZ_RTC_CTRL_WRDY              BIT(7)
++#define JZ_RTC_WAKEUP_FILTER_MASK     0x0000FFE0
++#define JZ_RTC_RESET_COUNTER_MASK     0x00000FE0
+ 
+-static void jz4740_power_off(void)
++static inline void jz4740_rtc_wait_ready(void __iomem *rtc_base)
+ {
+-      void __iomem *rtc_base = ioremap(JZ4740_RTC_BASE_ADDR, 0x24);
+       uint32_t ctrl;
+-
+       do {
+               ctrl = readl(rtc_base + JZ_REG_RTC_CTRL);
+       } while (!(ctrl & JZ_RTC_CTRL_WRDY));
++}
+ 
++static void jz4740_power_off(void)
++{
++      void __iomem *rtc_base = ioremap(JZ4740_RTC_BASE_ADDR, 0x38);
++      unsigned long long wakeup_filter_ticks;
++      unsigned long long reset_counter_ticks;
++
++      /* Set minimum wakeup pin assertion time: 100 ms.
++         Range is 0 to 2 sec if RTC is clocked at 32 kHz. */
++      wakeup_filter_ticks = (100 * jz4740_clock_bdata.rtc_rate) / 1000;
++      if (wakeup_filter_ticks < JZ_RTC_WAKEUP_FILTER_MASK)
++              wakeup_filter_ticks &= JZ_RTC_WAKEUP_FILTER_MASK;
++      else
++              wakeup_filter_ticks = JZ_RTC_WAKEUP_FILTER_MASK;
++      jz4740_rtc_wait_ready(rtc_base);
++      writel(wakeup_filter_ticks, rtc_base + JZ_REG_RTC_WAKEUP_FILTER);
++
++      /* Set reset pin low-level assertion time after wakeup: 60 ms.
++         Range is 0 to 125 ms if RTC is clocked at 32 kHz. */
++      reset_counter_ticks = (60 * jz4740_clock_bdata.rtc_rate) / 1000;
++      if (reset_counter_ticks < JZ_RTC_RESET_COUNTER_MASK)
++              reset_counter_ticks &= JZ_RTC_RESET_COUNTER_MASK;
++      else
++              reset_counter_ticks = JZ_RTC_RESET_COUNTER_MASK;
++      jz4740_rtc_wait_ready(rtc_base);
++      writel(reset_counter_ticks, rtc_base + JZ_REG_RTC_RESET_COUNTER);
++
++      jz4740_rtc_wait_ready(rtc_base);
+       writel(1, rtc_base + JZ_REG_RTC_HIBERNATE);
++
+       jz4740_halt();
+ }
+ 
+-- 
+1.7.5.4
+