OMAP2/3 clock: simplify omap2_clksel_get_src_field()

Get rid of void __iomem * usage in omap2_clksel_get_src_field.
Prepend the function name with an underscore to highlight that it is a
static function.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/clock.c

@@ -803,18 +803,14 @@ int omap2_clk_set_rate(struct clk *clk, unsigned long rate)
 
 /*
  * Converts encoded control register address into a full address
- * On error, *src_addr will be returned as 0.
+ * On error, the return value (parent_div) will be 0.
  */
-static u32 omap2_clksel_get_src_field(void __iomem **src_addr,
-				      struct clk *src_clk, u32 *field_mask,
-				      struct clk *clk, u32 *parent_div)
+static u32 _omap2_clksel_get_src_field(struct clk *src_clk, struct clk *clk,
+				       u32 *field_val)
 {
 	const struct clksel *clks;
 	const struct clksel_rate *clkr;
 
-	*parent_div = 0;
-	*src_addr = NULL;
-
 	clks = omap2_get_clksel_by_parent(clk, src_clk);
 	if (!clks)
 		return 0;
@@ -834,17 +830,14 @@ static u32 omap2_clksel_get_src_field(void __iomem **src_addr,
 	/* Should never happen.  Add a clksel mask to the struct clk. */
 	WARN_ON(clk->clksel_mask == 0);
 
-	*field_mask = clk->clksel_mask;
-	*src_addr = clk->clksel_reg;
-	*parent_div = clkr->div;
+	*field_val = clkr->val;
 
-	return clkr->val;
+	return clkr->div;
 }
 
 int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent)
 {
-	void __iomem *src_addr;
-	u32 field_val, field_mask, v, parent_div;
+	u32 field_val, v, parent_div;
 
 	if (clk->flags & CONFIG_PARTICIPANT)
 		return -EINVAL;
@@ -852,18 +845,18 @@ int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent)
 	if (!clk->clksel)
 		return -EINVAL;
 
-	field_val = omap2_clksel_get_src_field(&src_addr, new_parent,
-					       &field_mask, clk, &parent_div);
-	if (src_addr == NULL)
+	parent_div = _omap2_clksel_get_src_field(new_parent, clk, &field_val);
+	if (!parent_div)
 		return -EINVAL;
 
 	if (clk->usecount > 0)
 		_omap2_clk_disable(clk);
 
 	/* Set new source value (previous dividers if any in effect) */
-	v = __raw_readl(src_addr) & ~field_mask;
-	v |= (field_val << __ffs(field_mask));
-	__raw_writel(v, src_addr);
+	v = __raw_readl(clk->clksel_reg);
+	v &= ~clk->clksel_mask;
+	v |= field_val << __ffs(clk->clksel_mask);
+	__raw_writel(v, clk->clksel_reg);
 	wmb();
 
 	if (clk->flags & DELAYED_APP && cpu_is_omap24xx()) {