1 files changed, 46 insertions, 15 deletions

diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
index ba05aa42bd8e..045da923e75b 100644
--- a/arch/arm/mach-omap2/clock34xx.c
+++ b/arch/arm/mach-omap2/clock34xx.c
@@ -129,6 +129,9 @@ static struct omap_clk omap34xx_clks[] = {
         CLK(NULL,       "sgx_fck",      &sgx_fck,       CK_3430ES2),
         CLK(NULL,       "sgx_ick",      &sgx_ick,       CK_3430ES2),
         CLK(NULL,       "d2d_26m_fck",  &d2d_26m_fck,   CK_3430ES1),
+        CLK(NULL,       "modem_fck",    &modem_fck,     CK_343X),
+        CLK(NULL,       "sad2d_ick",    &sad2d_ick,     CK_343X),
+        CLK(NULL,       "mad2d_ick",    &mad2d_ick,     CK_343X),
         CLK(NULL,       "gpt10_fck",    &gpt10_fck,     CK_343X),
         CLK(NULL,       "gpt11_fck",    &gpt11_fck,     CK_343X),
         CLK(NULL,       "cpefuse_fck",  &cpefuse_fck,   CK_3430ES2),
@@ -281,6 +284,22 @@ static struct omap_clk omap34xx_clks[] = {
 
 #define MAX_DPLL_WAIT_TRIES             1000000
 
+#define MIN_SDRC_DLL_LOCK_FREQ          83000000
+
+#define CYCLES_PER_MHZ                  1000000
+
+/* Scale factor for fixed-point arith in omap3_core_dpll_m2_set_rate() */
+#define SDRC_MPURATE_SCALE              8
+
+/* 2^SDRC_MPURATE_BASE_SHIFT: MPU MHz that SDRC_MPURATE_LOOPS is defined for */
+#define SDRC_MPURATE_BASE_SHIFT         9
+
+/*
+ * SDRC_MPURATE_LOOPS: Number of MPU loops to execute at
+ * 2^MPURATE_BASE_SHIFT MHz for SDRC to stabilize
+ */
+#define SDRC_MPURATE_LOOPS              96
+
 /**
  * omap3_dpll_recalc - recalculate DPLL rate
  * @clk: DPLL struct clk
@@ -703,7 +722,9 @@ static int omap3_dpll4_set_rate(struct clk *clk, unsigned long rate)
 static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
 {
         u32 new_div = 0;
-        unsigned long validrate, sdrcrate;
+        u32 unlock_dll = 0;
+        u32 c;
+        unsigned long validrate, sdrcrate, mpurate;
         struct omap_sdrc_params *sp;
 
         if (!clk || !rate)
@@ -712,34 +733,44 @@ static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
         if (clk != &dpll3_m2_ck)
                 return -EINVAL;
 
-        if (rate == clk->rate)
-                return 0;
-
         validrate = omap2_clksel_round_rate_div(clk, rate, &new_div);
         if (validrate != rate)
                 return -EINVAL;
 
         sdrcrate = sdrc_ick.rate;
         if (rate > clk->rate)
-                sdrcrate <<= ((rate / clk->rate) - 1);
+                sdrcrate <<= ((rate / clk->rate) >> 1);
         else
-                sdrcrate >>= ((clk->rate / rate) - 1);
+                sdrcrate >>= ((clk->rate / rate) >> 1);
 
         sp = omap2_sdrc_get_params(sdrcrate);
         if (!sp)
                 return -EINVAL;
 
-        pr_info("clock: changing CORE DPLL rate from %lu to %lu\n", clk->rate,
-                validrate);
-        pr_info("clock: SDRC timing params used: %08x %08x %08x\n",
-                sp->rfr_ctrl, sp->actim_ctrla, sp->actim_ctrlb);
+        if (sdrcrate < MIN_SDRC_DLL_LOCK_FREQ) {
+                pr_debug("clock: will unlock SDRC DLL\n");
+                unlock_dll = 1;
+        }
 
-        /* REVISIT: SRAM code doesn't support other M2 divisors yet */
-        WARN_ON(new_div != 1 && new_div != 2);
+        /*
+         * XXX This only needs to be done when the CPU frequency changes
+         */
+        mpurate = arm_fck.rate / CYCLES_PER_MHZ;
+        c = (mpurate << SDRC_MPURATE_SCALE) >> SDRC_MPURATE_BASE_SHIFT;
+        c += 1;  /* for safety */
+        c *= SDRC_MPURATE_LOOPS;
+        c >>= SDRC_MPURATE_SCALE;
+        if (c == 0)
+                c = 1;
+
+        pr_debug("clock: changing CORE DPLL rate from %lu to %lu\n", clk->rate,
+                 validrate);
+        pr_debug("clock: SDRC timing params used: %08x %08x %08x\n",
+                 sp->rfr_ctrl, sp->actim_ctrla, sp->actim_ctrlb);
 
-        /* REVISIT: Add SDRC_MR changing to this code also */
         omap3_configure_core_dpll(sp->rfr_ctrl, sp->actim_ctrla,
-                                  sp->actim_ctrlb, new_div);
+                                  sp->actim_ctrlb, new_div, unlock_dll, c,
+                                  sp->mr, rate > clk->rate);
 
         return 0;
 }
@@ -956,7 +987,7 @@ int __init omap2_clk_init(void)
         clk_init(&omap2_clk_functions);
 
         for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++)
-                clk_init_one(c->lk.clk);
+                clk_preinit(c->lk.clk);
 
         for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++)
                 if (c->cpu & cpu_clkflg) {