ARM: Merge next-samsung-clock2

Merge branch 'next-samsung-clock2' into next-samsung-try7

1 files changed, 17 insertions, 8 deletions

diff --git a/arch/arm/plat-samsung/clock-clksrc.c b/arch/arm/plat-samsung/clock-clksrc.c
index 33c633a8be8d..ae8b8507663f 100644
--- a/arch/arm/plat-samsung/clock-clksrc.c
+++ b/arch/arm/plat-samsung/clock-clksrc.c
@@ -60,7 +60,7 @@ static int s3c_setrate_clksrc(struct clk *clk, unsigned long rate)
 
         rate = clk_round_rate(clk, rate);
         div = clk_get_rate(clk->parent) / rate;
-        if (div > 16)
+        if (div > (1 << sclk->reg_div.size))
                 return -EINVAL;
 
         val = __raw_readl(reg);
@@ -102,7 +102,9 @@ static int s3c_setparent_clksrc(struct clk *clk, struct clk *parent)
 static unsigned long s3c_roundrate_clksrc(struct clk *clk,
                                               unsigned long rate)
 {
+        struct clksrc_clk *sclk = to_clksrc(clk);
         unsigned long parent_rate = clk_get_rate(clk->parent);
+        int max_div = 1 << sclk->reg_div.size;
         int div;
 
         if (rate >= parent_rate)
@@ -114,8 +116,8 @@ static unsigned long s3c_roundrate_clksrc(struct clk *clk,
 
                 if (div == 0)
                         div = 1;
-                if (div > 16)
-                        div = 16;
+                if (div > max_div)
+                        div = max_div;
 
                 rate = parent_rate / div;
         }
@@ -129,11 +131,16 @@ void __init_or_cpufreq s3c_set_clksrc(struct clksrc_clk *clk, bool announce)
 {
         struct clksrc_sources *srcs = clk->sources;
         u32 mask = bit_mask(clk->reg_src.shift, clk->reg_src.size);
-        u32 clksrc = 0;
+        u32 clksrc;
 
-        if (clk->reg_src.reg)
-                clksrc = __raw_readl(clk->reg_src.reg);
+        if (!clk->reg_src.reg) {
+                if (!clk->clk.parent)
+                        printk(KERN_ERR "%s: no parent clock specified\n",
+                                clk->clk.name);
+                return;
+        }
 
+        clksrc = __raw_readl(clk->reg_src.reg);
         clksrc &= mask;
         clksrc >>= clk->reg_src.shift;
 
@@ -172,9 +179,11 @@ void __init s3c_register_clksrc(struct clksrc_clk *clksrc, int size)
 {
         int ret;
 
-        WARN_ON(!clksrc->reg_div.reg && !clksrc->reg_src.reg);
-
         for (; size > 0; size--, clksrc++) {
+                if (!clksrc->reg_div.reg && !clksrc->reg_src.reg)
+                        printk(KERN_ERR "%s: clock %s has no registers set\n",
+                               __func__, clksrc->clk.name);
+
                 /* fill in the default functions */
 
                 if (!clksrc->clk.ops) {