ARM: OMAP2+: clock: Remove all direct dereferencing of struct clk

While we move to Common Clk Framework (CCF), direct deferencing of struct
clk wouldn't be possible anymore. Hence get rid of all such instances
in the current clock code and use macros/helpers similar to the ones that
are provided by CCF.

While here also concatenate some strings split across multiple lines
which seem to be needed anyway.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: simplified some compound expressions; reformatted some
 messages]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Mike Turquette <mturquette@linaro.org>

arch/arm/mach-omap2/clkt_clksel.c

@@ -71,8 +71,8 @@ static const struct clksel *_get_clksel_by_parent(struct clk *clk,
 
 	if (!clks->parent) {
 		/* This indicates a data problem */
-		WARN(1, "clock: Could not find parent clock %s in clksel array "
-		     "of clock %s\n", src_clk->name, clk->name);
+		WARN(1, "clock: %s: could not find parent clock %s in clksel array\n",
+		     __clk_get_name(clk), __clk_get_name(src_clk));
 		return NULL;
 	}
 
@@ -126,8 +126,9 @@ static u8 _get_div_and_fieldval(struct clk *src_clk, struct clk *clk,
 
 	if (max_div == 0) {
 		/* This indicates an error in the clksel data */
-		WARN(1, "clock: Could not find divisor for clock %s parent %s"
-		     "\n", clk->name, src_clk->parent->name);
+		WARN(1, "clock: %s: could not find divisor for parent %s\n",
+		     __clk_get_name(clk),
+		     __clk_get_name(__clk_get_parent(src_clk)));
 		return 0;
 	}
 
@@ -176,8 +177,10 @@ static u32 _clksel_to_divisor(struct clk *clk, u32 field_val)
 {
 	const struct clksel *clks;
 	const struct clksel_rate *clkr;
+	struct clk *parent;
 
-	clks = _get_clksel_by_parent(clk, clk->parent);
+	parent = __clk_get_parent(clk);
+	clks = _get_clksel_by_parent(clk, parent);
 	if (!clks)
 		return 0;
 
@@ -191,8 +194,8 @@ static u32 _clksel_to_divisor(struct clk *clk, u32 field_val)
 
 	if (!clkr->div) {
 		/* This indicates a data error */
-		WARN(1, "clock: Could not find fieldval %d for clock %s parent "
-		     "%s\n", field_val, clk->name, clk->parent->name);
+		WARN(1, "clock: %s: could not find fieldval %d for parent %s\n",
+		     __clk_get_name(clk), field_val, __clk_get_name(parent));
 		return 0;
 	}
 
@@ -213,11 +216,13 @@ static u32 _divisor_to_clksel(struct clk *clk, u32 div)
 {
 	const struct clksel *clks;
 	const struct clksel_rate *clkr;
+	struct clk *parent;
 
 	/* should never happen */
 	WARN_ON(div == 0);
 
-	clks = _get_clksel_by_parent(clk, clk->parent);
+	parent = __clk_get_parent(clk);
+	clks = _get_clksel_by_parent(clk, parent);
 	if (!clks)
 		return ~0;
 
@@ -230,8 +235,8 @@ static u32 _divisor_to_clksel(struct clk *clk, u32 div)
 	}
 
 	if (!clkr->div) {
-		pr_err("clock: Could not find divisor %d for clock %s parent "
-		       "%s\n", div, clk->name, clk->parent->name);
+		pr_err("clock: %s: could not find divisor %d for parent %s\n",
+		       __clk_get_name(clk), div, __clk_get_name(parent));
 		return ~0;
 	}
 
@@ -281,16 +286,23 @@ u32 omap2_clksel_round_rate_div(struct clk *clk, unsigned long target_rate,
 	const struct clksel *clks;
 	const struct clksel_rate *clkr;
 	u32 last_div = 0;
+	struct clk *parent;
+	unsigned long parent_rate;
+	const char *clk_name;
+
+	parent = __clk_get_parent(clk);
+	parent_rate = __clk_get_rate(parent);
+	clk_name = __clk_get_name(clk);
 
 	if (!clk->clksel || !clk->clksel_mask)
 		return ~0;
 
 	pr_debug("clock: clksel_round_rate_div: %s target_rate %ld\n",
-		 clk->name, target_rate);
+		 clk_name, target_rate);
 
 	*new_div = 1;
 
-	clks = _get_clksel_by_parent(clk, clk->parent);
+	clks = _get_clksel_by_parent(clk, parent);
 	if (!clks)
 		return ~0;
 
@@ -300,30 +312,29 @@ u32 omap2_clksel_round_rate_div(struct clk *clk, unsigned long target_rate,
 
 		/* Sanity check */
 		if (clkr->div <= last_div)
-			pr_err("clock: clksel_rate table not sorted "
-			       "for clock %s", clk->name);
+			pr_err("clock: %s: clksel_rate table not sorted\n",
+			       clk_name);
 
 		last_div = clkr->div;
 
-		test_rate = clk->parent->rate / clkr->div;
+		test_rate = parent_rate / clkr->div;
 
 		if (test_rate <= target_rate)
 			break; /* found it */
 	}
 
 	if (!clkr->div) {
-		pr_err("clock: Could not find divisor for target "
-		       "rate %ld for clock %s parent %s\n", target_rate,
-		       clk->name, clk->parent->name);
+		pr_err("clock: %s: could not find divisor for target rate %ld for parent %s\n",
+		       clk_name, target_rate, __clk_get_name(parent));
 		return ~0;
 	}
 
 	*new_div = clkr->div;
 
 	pr_debug("clock: new_div = %d, new_rate = %ld\n", *new_div,
-		 (clk->parent->rate / clkr->div));
+		 (parent_rate / clkr->div));
 
-	return clk->parent->rate / clkr->div;
+	return parent_rate / clkr->div;
 }
 
 /*
@@ -345,10 +356,15 @@ void omap2_init_clksel_parent(struct clk *clk)
 	const struct clksel *clks;
 	const struct clksel_rate *clkr;
 	u32 r, found = 0;
+	struct clk *parent;
+	const char *clk_name;
 
 	if (!clk->clksel || !clk->clksel_mask)
 		return;
 
+	parent = __clk_get_parent(clk);
+	clk_name = __clk_get_name(clk);
+
 	r = __raw_readl(clk->clksel_reg) & clk->clksel_mask;
 	r >>= __ffs(clk->clksel_mask);
 
@@ -358,12 +374,14 @@ void omap2_init_clksel_parent(struct clk *clk)
 				continue;
 
 			if (clkr->val == r) {
-				if (clk->parent != clks->parent) {
+				if (parent != clks->parent) {
 					pr_debug("clock: inited %s parent "
 						 "to %s (was %s)\n",
-						 clk->name, clks->parent->name,
-						 ((clk->parent) ?
-						  clk->parent->name : "NULL"));
+						 clk_name,
+						 __clk_get_name(clks->parent),
+						 ((parent) ?
+						  __clk_get_name(parent) :
+						 "NULL"));
 					clk_reparent(clk, clks->parent);
 				};
 				found = 1;
@@ -373,7 +391,7 @@ void omap2_init_clksel_parent(struct clk *clk)
 
 	/* This indicates a data error */
 	WARN(!found, "clock: %s: init parent: could not find regval %0x\n",
-	     clk->name, r);
+	     clk_name, r);
 
 	return;
 }
@@ -391,15 +409,17 @@ unsigned long omap2_clksel_recalc(struct clk *clk)
 {
 	unsigned long rate;
 	u32 div = 0;
+	struct clk *parent;
 
 	div = _read_divisor(clk);
 	if (div == 0)
-		return clk->rate;
+		return __clk_get_rate(clk);
 
-	rate = clk->parent->rate / div;
+	parent = __clk_get_parent(clk);
+	rate = __clk_get_rate(parent) / div;
 
-	pr_debug("clock: %s: recalc'd rate is %ld (div %d)\n", clk->name,
-		 rate, div);
+	pr_debug("clock: %s: recalc'd rate is %ld (div %d)\n",
+		 __clk_get_name(clk), rate, div);
 
 	return rate;
 }
@@ -454,9 +474,10 @@ int omap2_clksel_set_rate(struct clk *clk, unsigned long rate)
 
 	_write_clksel_reg(clk, field_val);
 
-	clk->rate = clk->parent->rate / new_div;
+	clk->rate = __clk_get_rate(__clk_get_parent(clk)) / new_div;
 
-	pr_debug("clock: %s: set rate to %ld\n", clk->name, clk->rate);
+	pr_debug("clock: %s: set rate to %ld\n", __clk_get_name(clk),
+		 __clk_get_rate(clk));
 
 	return 0;
 }
@@ -498,13 +519,15 @@ int omap2_clksel_set_parent(struct clk *clk, struct clk *new_parent)
 	clk_reparent(clk, new_parent);
 
 	/* CLKSEL clocks follow their parents' rates, divided by a divisor */
-	clk->rate = new_parent->rate;
+	clk->rate = __clk_get_rate(new_parent);
 
 	if (parent_div > 0)
-		clk->rate /= parent_div;
+		__clk_get_rate(clk) /= parent_div;
 
 	pr_debug("clock: %s: set parent to %s (new rate %ld)\n",
-		 clk->name, clk->parent->name, clk->rate);
+		 __clk_get_name(clk),
+		 __clk_get_name(__clk_get_parent(clk)),
+		 __clk_get_rate(clk));
 
 	return 0;
 }