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ARM: OMAP2: Place SMS and SDRC into smart idle mode

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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>
This commit is contained in:
Juha Yrjola 2006-12-06 17:13:46 -08:00 committed by Tony Lindgren
parent 81cfe79b9c
commit 33c9907535
2 changed files with 50 additions and 0 deletions
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2
arch/arm/mach-omap2/io.c
View File

@ -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);
extern void omapfb_reserve_sdram(void);
@ -80,5 +81,6 @@ void __init omap2_init_common_hw(void)
{
omap2_mux_init();
omap2_clk_init();
omap2_init_memory();
gpmc_init();
}

48
arch/arm/mach-omap2/memory.c
View File

@ -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);
}