From: Juha Yrjola <[email protected]>
Place SMS and SDRC into smart idle mode
Signed-off-by: Juha Yrjola <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
---
arch/arm/mach-omap2/io.c | 2 +
arch/arm/mach-omap2/memory.c | 48 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+), 0 deletions(-)
Index: linux-2.6/arch/arm/mach-omap2/io.c
===================================================================
--- linux-2.6.orig/arch/arm/mach-omap2/io.c 2007-04-09 15:12:08.000000000 -0400
+++ linux-2.6/arch/arm/mach-omap2/io.c 2007-04-09 15:26:32.000000000 -0400
@@ -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();
}
Index: linux-2.6/arch/arm/mach-omap2/memory.c
===================================================================
--- linux-2.6.orig/arch/arm/mach-omap2/memory.c 2007-04-06 09:00:28.000000000 -0400
+++ linux-2.6/arch/arm/mach-omap2/memory.c 2007-04-09 15:26:32.000000000 -0400
@@ -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_
/* 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);
+
+}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
