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/clkt2xxx_apll.c

@@ -59,7 +59,7 @@ static int omap2_clk_apll_enable(struct clk *clk, u32 status_mask)
 	omap2_cm_write_mod_reg(cval, PLL_MOD, CM_CLKEN);
 
 	omap2_cm_wait_idlest(cm_idlest_pll, status_mask,
-			     OMAP24XX_CM_IDLEST_VAL, clk->name);
+			     OMAP24XX_CM_IDLEST_VAL, __clk_get_name(clk));
 
 	/*
 	 * REVISIT: Should we return an error code if omap2_wait_clock_ready()

arch/arm/mach-omap2/clkt2xxx_virt_prcm_set.c

@@ -68,14 +68,15 @@ unsigned long omap2_table_mpu_recalc(struct clk *clk)
 long omap2_round_to_table_rate(struct clk *clk, unsigned long rate)
 {
 	const struct prcm_config *ptr;
-	long highest_rate;
+	long highest_rate, sys_clk_rate;
 
 	highest_rate = -EINVAL;
+	sys_clk_rate = __clk_get_rate(sclk);
 
 	for (ptr = rate_table; ptr->mpu_speed; ptr++) {
 		if (!(ptr->flags & cpu_mask))
 			continue;
-		if (ptr->xtal_speed != sclk->rate)
+		if (ptr->xtal_speed != sys_clk_rate)
 			continue;
 
 		highest_rate = ptr->mpu_speed;
@@ -94,12 +95,15 @@ int omap2_select_table_rate(struct clk *clk, unsigned long rate)
 	const struct prcm_config *prcm;
 	unsigned long found_speed = 0;
 	unsigned long flags;
+	long sys_clk_rate;
+
+	sys_clk_rate = __clk_get_rate(sclk);
 
 	for (prcm = rate_table; prcm->mpu_speed; prcm++) {
 		if (!(prcm->flags & cpu_mask))
 			continue;
 
-		if (prcm->xtal_speed != sclk->rate)
+		if (prcm->xtal_speed != sys_clk_rate)
 			continue;
 
 		if (prcm->mpu_speed <= rate) {

arch/arm/mach-omap2/clkt34xx_dpll3m2.c

@@ -56,6 +56,7 @@ int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
 	struct omap_sdrc_params *sdrc_cs0;
 	struct omap_sdrc_params *sdrc_cs1;
 	int ret;
+	unsigned long clkrate;
 
 	if (!clk || !rate)
 		return -EINVAL;
@@ -64,11 +65,12 @@ int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
 	if (validrate != rate)
 		return -EINVAL;
 
-	sdrcrate = sdrc_ick_p->rate;
-	if (rate > clk->rate)
-		sdrcrate <<= ((rate / clk->rate) >> 1);
+	sdrcrate = __clk_get_rate(sdrc_ick_p);
+	clkrate = __clk_get_rate(clk);
+	if (rate > clkrate)
+		sdrcrate <<= ((rate / clkrate) >> 1);
 	else
-		sdrcrate >>= ((clk->rate / rate) >> 1);
+		sdrcrate >>= ((clkrate / rate) >> 1);
 
 	ret = omap2_sdrc_get_params(sdrcrate, &sdrc_cs0, &sdrc_cs1);
 	if (ret)
@@ -82,16 +84,16 @@ int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
 	/*
 	 * XXX This only needs to be done when the CPU frequency changes
 	 */
-	_mpurate = arm_fck_p->rate / CYCLES_PER_MHZ;
+	_mpurate = __clk_get_rate(arm_fck_p) / 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: changing CORE DPLL rate from %lu to %lu\n",
+		 clkrate, validrate);
 	pr_debug("clock: SDRC CS0 timing params used:"
 		 " RFR %08x CTRLA %08x CTRLB %08x MR %08x\n",
 		 sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
@@ -104,14 +106,14 @@ int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate)
 
 	if (sdrc_cs1)
 		omap3_configure_core_dpll(
-				  new_div, unlock_dll, c, rate > clk->rate,
+				  new_div, unlock_dll, c, rate > clkrate,
 				  sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
 				  sdrc_cs0->actim_ctrlb, sdrc_cs0->mr,
 				  sdrc_cs1->rfr_ctrl, sdrc_cs1->actim_ctrla,
 				  sdrc_cs1->actim_ctrlb, sdrc_cs1->mr);
 	else
 		omap3_configure_core_dpll(
-				  new_div, unlock_dll, c, rate > clk->rate,
+				  new_div, unlock_dll, c, rate > clkrate,
 				  sdrc_cs0->rfr_ctrl, sdrc_cs0->actim_ctrla,
 				  sdrc_cs0->actim_ctrlb, sdrc_cs0->mr,
 				  0, 0, 0, 0);

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;
 }