[ARM] OMAP: Fix sparse, checkpatch warnings in OMAP2/3 PRCM/PM code

Fix sparse & checkpatch warnings in OMAP2/3 PRCM & PM code.  This mostly
consists of:

- converting pointer comparisons to integers in form similar to
  (ptr == 0) to the standard idiom (!ptr)

- labeling a few non-static private functions as static

- adding prototypes for *_init() functions in the appropriate header
  files, and getting rid of the corresponding open-coded extern
  prototypes in other C files

- renaming the variable 'sclk' in mach-omap2/clock.c:omap2_get_apll_clkin
  to avoid shadowing an earlier declaration

Clean up checkpatch issues.  This mostly involves:

- converting some asm/ includes to linux/ includes

- cleaning up some whitespace

- getting rid of braces for conditionals with single following statements

Also take care of a few odds and ends, including:

- getting rid of unlikely() and likely() - none of this code is particularly
  fast-path code, so the performance impact seems slim; and some of those
  likely() and unlikely() indicators are probably not as accurate as the
  ARM's branch predictor

- removing some superfluous casts

linux-omap source commit is 347df59f5d20fdf905afbc26b1328b0e28a8a01b.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 36 insertions, 35 deletions

diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c
index 53fda9977d55..886f73f3933a 100644
--- a/arch/arm/mach-omap2/clock.c
+++ b/arch/arm/mach-omap2/clock.c
@@ -26,7 +26,6 @@
 
 #include <mach/clock.h>
 #include <mach/clockdomain.h>
-#include <mach/sram.h>
 #include <mach/cpu.h>
 #include <asm/div64.h>
 
@@ -187,11 +186,10 @@ int omap2_wait_clock_ready(void __iomem *reg, u32 mask, const char *name)
          * 24xx uses 0 to indicate not ready, and 1 to indicate ready.
          * 34xx reverses this, just to keep us on our toes
          */
-        if (cpu_mask & (RATE_IN_242X | RATE_IN_243X)) {
+        if (cpu_mask & (RATE_IN_242X | RATE_IN_243X))
                 ena = mask;
-        } else if (cpu_mask & RATE_IN_343X) {
+        else if (cpu_mask & RATE_IN_343X)
                 ena = 0;
-        }
 
         /* Wait for lock */
         while (((__raw_readl(reg) & mask) != ena) &&
@@ -267,7 +265,7 @@ static int omap2_dflt_clk_enable_wait(struct clk *clk)
 {
         int ret;
 
-        if (unlikely(clk->enable_reg == NULL)) {
+        if (!clk->enable_reg) {
                 printk(KERN_ERR "clock.c: Enable for %s without enable code\n",
                        clk->name);
                 return 0; /* REVISIT: -EINVAL */
@@ -283,7 +281,7 @@ static void omap2_dflt_clk_disable(struct clk *clk)
 {
         u32 regval32;
 
-        if (clk->enable_reg == NULL) {
+        if (!clk->enable_reg) {
                 /*
                  * 'Independent' here refers to a clock which is not
                  * controlled by its parent.
@@ -330,7 +328,7 @@ void omap2_clk_disable(struct clk *clk)
 {
         if (clk->usecount > 0 && !(--clk->usecount)) {
                 _omap2_clk_disable(clk);
-                if (likely((u32)clk->parent))
+                if (clk->parent)
                         omap2_clk_disable(clk->parent);
                 if (clk->clkdm)
                         omap2_clkdm_clk_disable(clk->clkdm, clk);
@@ -343,10 +341,10 @@ int omap2_clk_enable(struct clk *clk)
         int ret = 0;
 
         if (clk->usecount++ == 0) {
-                if (likely((u32)clk->parent))
+                if (clk->parent)
                         ret = omap2_clk_enable(clk->parent);
 
-                if (unlikely(ret != 0)) {
+                if (ret != 0) {
                         clk->usecount--;
                         return ret;
                 }
@@ -356,7 +354,7 @@ int omap2_clk_enable(struct clk *clk)
 
                 ret = _omap2_clk_enable(clk);
 
-                if (unlikely(ret != 0)) {
+                if (ret != 0) {
                         if (clk->clkdm)
                                 omap2_clkdm_clk_disable(clk->clkdm, clk);
 
@@ -384,7 +382,7 @@ void omap2_clksel_recalc(struct clk *clk)
         if (div == 0)
                 return;
 
-        if (unlikely(clk->rate == clk->parent->rate / div))
+        if (clk->rate == (clk->parent->rate / div))
                 return;
         clk->rate = clk->parent->rate / div;
 
@@ -400,8 +398,8 @@ void omap2_clksel_recalc(struct clk *clk)
  * the element associated with the supplied parent clock address.
  * Returns a pointer to the struct clksel on success or NULL on error.
  */
-const struct clksel *omap2_get_clksel_by_parent(struct clk *clk,
-                                                struct clk *src_clk)
+static const struct clksel *omap2_get_clksel_by_parent(struct clk *clk,
+                                                       struct clk *src_clk)
 {
         const struct clksel *clks;
 
@@ -450,7 +448,7 @@ u32 omap2_clksel_round_rate_div(struct clk *clk, unsigned long target_rate,
         *new_div = 1;
 
         clks = omap2_get_clksel_by_parent(clk, clk->parent);
-        if (clks == NULL)
+        if (!clks)
                 return ~0;
 
         for (clkr = clks->rates; clkr->div; clkr++) {
@@ -509,7 +507,7 @@ long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate)
 /* Given a clock and a rate apply a clock specific rounding function */
 long omap2_clk_round_rate(struct clk *clk, unsigned long rate)
 {
-        if (clk->round_rate != NULL)
+        if (clk->round_rate)
                 return clk->round_rate(clk, rate);
 
         if (clk->flags & RATE_FIXED)
@@ -535,7 +533,7 @@ u32 omap2_clksel_to_divisor(struct clk *clk, u32 field_val)
         const struct clksel_rate *clkr;
 
         clks = omap2_get_clksel_by_parent(clk, clk->parent);
-        if (clks == NULL)
+        if (!clks)
                 return 0;
 
         for (clkr = clks->rates; clkr->div; clkr++) {
@@ -571,7 +569,7 @@ u32 omap2_divisor_to_clksel(struct clk *clk, u32 div)
         WARN_ON(div == 0);
 
         clks = omap2_get_clksel_by_parent(clk, clk->parent);
-        if (clks == NULL)
+        if (!clks)
                 return 0;
 
         for (clkr = clks->rates; clkr->div; clkr++) {
@@ -596,9 +594,9 @@ u32 omap2_divisor_to_clksel(struct clk *clk, u32 div)
  *
  * Returns the address of the clksel register upon success or NULL on error.
  */
-void __iomem *omap2_get_clksel(struct clk *clk, u32 *field_mask)
+static void __iomem *omap2_get_clksel(struct clk *clk, u32 *field_mask)
 {
-        if (unlikely((clk->clksel_reg == NULL) || (clk->clksel_mask == NULL)))
+        if (!clk->clksel_reg || (clk->clksel_mask == 0))
                 return NULL;
 
         *field_mask = clk->clksel_mask;
@@ -618,7 +616,7 @@ u32 omap2_clksel_get_divisor(struct clk *clk)
         void __iomem *div_addr;
 
         div_addr = omap2_get_clksel(clk, &field_mask);
-        if (div_addr == NULL)
+        if (!div_addr)
                 return 0;
 
         field_val = __raw_readl(div_addr) & field_mask;
@@ -637,7 +635,7 @@ int omap2_clksel_set_rate(struct clk *clk, unsigned long rate)
                 return -EINVAL;
 
         div_addr = omap2_get_clksel(clk, &field_mask);
-        if (div_addr == NULL)
+        if (!div_addr)
                 return -EINVAL;
 
         field_val = omap2_divisor_to_clksel(clk, new_div);
@@ -675,7 +673,7 @@ int omap2_clk_set_rate(struct clk *clk, unsigned long rate)
                 return -EINVAL;
 
         /* dpll_ck, core_ck, virt_prcm_set; plus all clksel clocks */
-        if (clk->set_rate != NULL)
+        if (clk->set_rate)
                 ret = clk->set_rate(clk, rate);
 
         return ret;
@@ -696,7 +694,7 @@ static u32 omap2_clksel_get_src_field(void __iomem **src_addr,
         *src_addr = NULL;
 
         clks = omap2_get_clksel_by_parent(clk, src_clk);
-        if (clks == NULL)
+        if (!clks)
                 return 0;
 
         for (clkr = clks->rates; clkr->div; clkr++) {
@@ -726,7 +724,7 @@ int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent)
         void __iomem *src_addr;
         u32 field_val, field_mask, reg_val, parent_div;
 
-        if (unlikely(clk->flags & CONFIG_PARTICIPANT))
+        if (clk->flags & CONFIG_PARTICIPANT)
                 return -EINVAL;
 
         if (!clk->clksel)
@@ -734,7 +732,7 @@ int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent)
 
         field_val = omap2_clksel_get_src_field(&src_addr, new_parent,
                                                &field_mask, clk, &parent_div);
-        if (src_addr == NULL)
+        if (!src_addr)
                 return -EINVAL;
 
         if (clk->usecount > 0)
@@ -794,7 +792,8 @@ int omap2_dpll_set_rate_tolerance(struct clk *clk, unsigned int tolerance)
         return 0;
 }
 
-static unsigned long _dpll_compute_new_rate(unsigned long parent_rate, unsigned int m, unsigned int n)
+static unsigned long _dpll_compute_new_rate(unsigned long parent_rate,
+                                            unsigned int m, unsigned int n)
 {
         unsigned long long num;
 
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index b0358b659b43..90077f0df78d 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -27,7 +27,7 @@ void omap2_clk_disable(struct clk *clk);
 long omap2_clk_round_rate(struct clk *clk, unsigned long rate);
 int omap2_clk_set_rate(struct clk *clk, unsigned long rate);
 int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent);
-int omap2_dpll_rate_tolerance_set(struct clk *clk, unsigned int tolerance);
+int omap2_dpll_set_rate_tolerance(struct clk *clk, unsigned int tolerance);
 long omap2_dpll_round_rate(struct clk *clk, unsigned long target_rate);
 
 #ifdef CONFIG_OMAP_RESET_CLOCKS
diff --git a/arch/arm/mach-omap2/clock24xx.c b/arch/arm/mach-omap2/clock24xx.c
index bd77ef2d5ae9..91ad2070264d 100644
--- a/arch/arm/mach-omap2/clock24xx.c
+++ b/arch/arm/mach-omap2/clock24xx.c
@@ -339,7 +339,7 @@ static const struct clkops clkops_fixed = {
  * Uses the current prcm set to tell if a rate is valid.
  * You can go slower, but not faster within a given rate set.
  */
-long omap2_dpllcore_round_rate(unsigned long target_rate)
+static long omap2_dpllcore_round_rate(unsigned long target_rate)
 {
         u32 high, low, core_clk_src;
 
@@ -550,7 +550,9 @@ static int omap2_select_table_rate(struct clk *clk, unsigned long rate)
 
                 /* Major subsystem dividers */
                 tmp = cm_read_mod_reg(CORE_MOD, CM_CLKSEL1) & OMAP24XX_CLKSEL_DSS2_MASK;
-                cm_write_mod_reg(prcm->cm_clksel1_core | tmp, CORE_MOD, CM_CLKSEL1);
+                cm_write_mod_reg(prcm->cm_clksel1_core | tmp, CORE_MOD,
+                                 CM_CLKSEL1);
+
                 if (cpu_is_omap2430())
                         cm_write_mod_reg(prcm->cm_clksel_mdm,
                                          OMAP2430_MDM_MOD, CM_CLKSEL);
@@ -582,20 +584,20 @@ static struct clk_functions omap2_clk_functions = {
 
 static u32 omap2_get_apll_clkin(void)
 {
-        u32 aplls, sclk = 0;
+        u32 aplls, srate = 0;
 
         aplls = cm_read_mod_reg(PLL_MOD, CM_CLKSEL1);
         aplls &= OMAP24XX_APLLS_CLKIN_MASK;
         aplls >>= OMAP24XX_APLLS_CLKIN_SHIFT;
 
         if (aplls == APLLS_CLKIN_19_2MHZ)
-                sclk = 19200000;
+                srate = 19200000;
         else if (aplls == APLLS_CLKIN_13MHZ)
-                sclk = 13000000;
+                srate = 13000000;
         else if (aplls == APLLS_CLKIN_12MHZ)
-                sclk = 12000000;
+                srate = 12000000;
 
-        return sclk;
+        return srate;
 }
 
 static u32 omap2_get_sysclkdiv(void)
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index 55361c16c9d9..ea8ceaed09cb 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -103,7 +103,7 @@ static struct platform_suspend_ops omap_pm_ops = {
         .valid          = suspend_valid_only_mem,
 };
 
-int __init omap2_pm_init(void)
+static int __init omap2_pm_init(void)
 {
         return 0;
 }