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Subject[PATCH 1/90] ARM: OMAP: Place SMS and SDRC into smart idle mode
Date
From: Juha Yrjola <juha.yrjola@solidboot.com>

Place SMS and SDRC into smart idle mode

Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
arch/arm/mach-omap2/io.c | 2 +
arch/arm/mach-omap2/memory.c | 48 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index a0728c3..748920f 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -26,6 +26,7 @@
extern void omap_sram_init(void);
extern int omap2_clk_init(void);
extern void omap2_check_revision(void);
+extern void omap2_init_memory(void);
extern void gpmc_init(void);

/*
@@ -67,5 +68,6 @@ void __init omap2_init_common_hw(void)
{
omap2_mux_init();
omap2_clk_init();
+ omap2_init_memory();
gpmc_init();
}
diff --git a/arch/arm/mach-omap2/memory.c b/arch/arm/mach-omap2/memory.c
index 85cbc2a..f173aa8 100644
--- a/arch/arm/mach-omap2/memory.c
+++ b/arch/arm/mach-omap2/memory.c
@@ -30,6 +30,38 @@
#include "prcm-regs.h"
#include "memory.h"

+#define SMS_BASE 0x68008000
+#define SMS_SYSCONFIG 0x010
+
+#define SDRC_BASE 0x68009000
+#define SDRC_SYSCONFIG 0x010
+#define SDRC_SYSSTATUS 0x014
+
+static const u32 sms_base = IO_ADDRESS(SMS_BASE);
+static const u32 sdrc_base = IO_ADDRESS(SDRC_BASE);
+
+
+static inline void sms_write_reg(int idx, u32 val)
+{
+ __raw_writel(val, sms_base + idx);
+}
+
+static inline u32 sms_read_reg(int idx)
+{
+ return __raw_readl(sms_base + idx);
+}
+
+static inline void sdrc_write_reg(int idx, u32 val)
+{
+ __raw_writel(val, sdrc_base + idx);
+}
+
+static inline u32 sdrc_read_reg(int idx)
+{
+ return __raw_readl(sdrc_base + idx);
+}
+
+
static struct memory_timings mem_timings;

u32 omap2_memory_get_slow_dll_ctrl(void)
@@ -99,3 +131,19 @@ void omap2_init_memory_params(u32 force_lock_to_unlock_mode)
/* 90 degree phase for anything below 133Mhz + disable DLL filter */
mem_timings.slow_dll_ctrl |= ((1 << 1) | (3 << 8));
}
+
+void __init omap2_init_memory(void)
+{
+ u32 l;
+
+ l = sms_read_reg(SMS_SYSCONFIG);
+ l &= ~(0x3 << 3);
+ l |= (0x2 << 3);
+ sms_write_reg(SMS_SYSCONFIG, l);
+
+ l = sdrc_read_reg(SDRC_SYSCONFIG);
+ l &= ~(0x3 << 3);
+ l |= (0x2 << 3);
+ sdrc_write_reg(SDRC_SYSCONFIG, l);
+
+}
--
1.4.4.2
-
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