diff options
Diffstat (limited to 'target/linux/xburst/patches-3.2/0014-MIPS-JZ4740-reset-Initialize-hibernate-wakeup-counte.patch')
| -rw-r--r-- | target/linux/xburst/patches-3.2/0014-MIPS-JZ4740-reset-Initialize-hibernate-wakeup-counte.patch | 95 |
1 files changed, 95 insertions, 0 deletions
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 index 0000000000..6a49e35825 --- /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 + |