8 files changed, 45 insertions, 9 deletions
diff --git a/arch/arm/mach-omap2/board-2430sdp.c b/arch/arm/mach-omap2/board-2430sdp.c
index 83fa37211d77..7b29e1d00f23 100644
--- a/arch/arm/mach-omap2/board-2430sdp.c
+++ b/arch/arm/mach-omap2/board-2430sdp.c
@@ -185,7 +185,7 @@ out:
 
 static void __init omap_2430sdp_init_irq(void)
 {
-	omap2_init_common_hw();
+	omap2_init_common_hw(NULL);
 	omap_init_irq();
 	omap_gpio_init();
 	sdp2430_init_smc91x();
diff --git a/arch/arm/mach-omap2/board-apollon.c b/arch/arm/mach-omap2/board-apollon.c
index 0a7b24ba1652..0c911f414d8d 100644
--- a/arch/arm/mach-omap2/board-apollon.c
+++ b/arch/arm/mach-omap2/board-apollon.c
@@ -249,7 +249,7 @@ out:
 
 static void __init omap_apollon_init_irq(void)
 {
-	omap2_init_common_hw();
+	omap2_init_common_hw(NULL);
 	omap_init_irq();
 	omap_gpio_init();
 	apollon_init_smc91x();
diff --git a/arch/arm/mach-omap2/board-generic.c b/arch/arm/mach-omap2/board-generic.c
index 3b34c20d1df4..3492162a65c3 100644
--- a/arch/arm/mach-omap2/board-generic.c
+++ b/arch/arm/mach-omap2/board-generic.c
@@ -33,7 +33,7 @@
 
 static void __init omap_generic_init_irq(void)
 {
-	omap2_init_common_hw();
+	omap2_init_common_hw(NULL);
 	omap_init_irq();
 }
 
diff --git a/arch/arm/mach-omap2/board-h4.c b/arch/arm/mach-omap2/board-h4.c
index 5e9b14675b1e..ef55b45ab769 100644
--- a/arch/arm/mach-omap2/board-h4.c
+++ b/arch/arm/mach-omap2/board-h4.c
@@ -363,7 +363,7 @@ static void __init h4_init_flash(void)
 
 static void __init omap_h4_init_irq(void)
 {
-	omap2_init_common_hw();
+	omap2_init_common_hw(NULL);
 	omap_init_irq();
 	omap_gpio_init();
 	h4_init_flash();
diff --git a/arch/arm/mach-omap2/board-ldp.c b/arch/arm/mach-omap2/board-ldp.c
index f6a13451d1fd..61f7c365a28c 100644
--- a/arch/arm/mach-omap2/board-ldp.c
+++ b/arch/arm/mach-omap2/board-ldp.c
@@ -98,7 +98,7 @@ static inline void __init ldp_init_smc911x(void)
 
 static void __init omap_ldp_init_irq(void)
 {
-	omap2_init_common_hw();
+	omap2_init_common_hw(NULL);
 	omap_init_irq();
 	omap_gpio_init();
 	ldp_init_smc911x();
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 38c88fbe658d..ad312ccf2ec5 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -184,7 +184,7 @@ static int __init omap3_beagle_i2c_init(void)
 
 static void __init omap3_beagle_init_irq(void)
 {
-	omap2_init_common_hw();
+	omap2_init_common_hw(NULL);
 	omap_init_irq();
 	omap_gpio_init();
 }
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 3c1de3615eb8..916fcd3a2328 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -195,12 +195,12 @@ void __init omap2_map_common_io(void)
 	omapfb_reserve_sdram();
 }
 
-void __init omap2_init_common_hw(void)
+void __init omap2_init_common_hw(struct omap_sdrc_params *sp)
 {
 	omap2_mux_init();
 	pwrdm_init(powerdomains_omap);
 	clkdm_init(clockdomains_omap, clkdm_pwrdm_autodeps);
 	omap2_clk_init();
-	omap2_sdrc_init();
+	omap2_sdrc_init(sp);
 	gpmc_init();
 }
diff --git a/arch/arm/mach-omap2/sdrc.c b/arch/arm/mach-omap2/sdrc.c
index 24b54d50b893..2a30060cb4b7 100644
--- a/arch/arm/mach-omap2/sdrc.c
+++ b/arch/arm/mach-omap2/sdrc.c
@@ -12,6 +12,7 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
+#undef DEBUG
 
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -31,9 +32,42 @@
 #include <mach/sdrc.h>
 #include "sdrc.h"
 
+static struct omap_sdrc_params *sdrc_init_params;
+
 void __iomem *omap2_sdrc_base;
 void __iomem *omap2_sms_base;
 
+
+/**
+ * omap2_sdrc_get_params - return SDRC register values for a given clock rate
+ * @r: SDRC clock rate (in Hz)
+ *
+ * Return pre-calculated values for the SDRC_ACTIM_CTRLA,
+ * SDRC_ACTIM_CTRLB, SDRC_RFR_CTRL, and SDRC_MR registers, for a given
+ * SDRC clock rate 'r'.  These parameters control various timing
+ * delays in the SDRAM controller that are expressed in terms of the
+ * number of SDRC clock cycles to wait; hence the clock rate
+ * dependency. Note that sdrc_init_params must be sorted rate
+ * descending.  Also assumes that both chip-selects use the same
+ * timing parameters.  Returns a struct omap_sdrc_params * upon
+ * success, or NULL upon failure.
+ */
+struct omap_sdrc_params *omap2_sdrc_get_params(unsigned long r)
+{
+	struct omap_sdrc_params *sp;
+
+	sp = sdrc_init_params;
+
+	while (sp->rate != r)
+		sp++;
+
+	if (!sp->rate)
+		return NULL;
+
+	return sp;
+}
+
+
 void __init omap2_set_globals_sdrc(struct omap_globals *omap2_globals)
 {
 	omap2_sdrc_base = omap2_globals->sdrc;
@@ -41,7 +75,7 @@ void __init omap2_set_globals_sdrc(struct omap_globals *omap2_globals)
 }
 
 /* turn on smart idle modes for SDRAM scheduler and controller */
-void __init omap2_sdrc_init(void)
+void __init omap2_sdrc_init(struct omap_sdrc_params *sp)
 {
 	u32 l;
 
@@ -54,4 +88,6 @@ void __init omap2_sdrc_init(void)
 	l &= ~(0x3 << 3);
 	l |= (0x2 << 3);
 	sdrc_write_reg(l, SDRC_SYSCONFIG);
+
+	sdrc_init_params = sp;
 }