[PATCH v4 1/4] sunxi: psci: clean away preprocessor macros

[Sam Edwards]

This patch restructures psci.c to get away from the "many different
function definitions switched by #ifdef" paradigm to the preferred style
of having a single function definition with `if (IS_ENABLED(...))` to
make the optimizer include only the appropriate function bodies instead.

There are no functional changes here.

Signed-off-by: Sam Edwards <CFSworks at gmail.com>
Reviewed-by: Andre Przywara <andre.przywara at arm.com>
---
 arch/arm/cpu/armv7/sunxi/psci.c | 103 +++++++++++++-------------------
 1 file changed, 43 insertions(+), 60 deletions(-)

diff --git a/arch/arm/cpu/armv7/sunxi/psci.c b/arch/arm/cpu/armv7/sunxi/psci.c
index e1d3638b5c..69fa3f3c2e 100644
--- a/arch/arm/cpu/armv7/sunxi/psci.c
+++ b/arch/arm/cpu/armv7/sunxi/psci.c
@@ -76,11 +76,8 @@ static void __secure __mdelay(u32 ms)
 	isb();
 }
 
-static void __secure clamp_release(u32 __maybe_unused *clamp)
+static void __secure clamp_release(u32 *clamp)
 {
-#if defined(CONFIG_MACH_SUN6I) || defined(CONFIG_MACH_SUN7I) || \
-	defined(CONFIG_MACH_SUN8I_H3) || \
-	defined(CONFIG_MACH_SUN8I_R40)
 	u32 tmp = 0x1ff;
 	do {
 		tmp >>= 1;
@@ -88,83 +85,69 @@ static void __secure clamp_release(u32 __maybe_unused *clamp)
 	} while (tmp);
 
 	__mdelay(10);
-#endif
 }
 
-static void __secure clamp_set(u32 __maybe_unused *clamp)
+static void __secure clamp_set(u32 *clamp)
 {
-#if defined(CONFIG_MACH_SUN6I) || defined(CONFIG_MACH_SUN7I) || \
-	defined(CONFIG_MACH_SUN8I_H3) || \
-	defined(CONFIG_MACH_SUN8I_R40)
 	writel(0xff, clamp);
-#endif
 }
 
-static void __secure sunxi_power_switch(u32 *clamp, u32 *pwroff, bool on,
-					int cpu)
+static void __secure sunxi_set_entry_address(void *entry)
 {
-	if (on) {
-		/* Release power clamp */
-		clamp_release(clamp);
-
-		/* Clear power gating */
-		clrbits_le32(pwroff, BIT(cpu));
+	/* secondary core entry address is programmed differently on R40 */
+	if (IS_ENABLED(CONFIG_MACH_SUN8I_R40)) {
+		writel((u32)entry,
+		       SUNXI_SRAMC_BASE + SUN8I_R40_SRAMC_SOFT_ENTRY_REG0);
 	} else {
-		/* Set power gating */
-		setbits_le32(pwroff, BIT(cpu));
+		struct sunxi_cpucfg_reg *cpucfg =
+			(struct sunxi_cpucfg_reg *)SUNXI_CPUCFG_BASE;
 
-		/* Activate power clamp */
-		clamp_set(clamp);
+		writel((u32)entry, &cpucfg->priv0);
 	}
 }
 
-#ifdef CONFIG_MACH_SUN8I_R40
-/* secondary core entry address is programmed differently on R40 */
-static void __secure sunxi_set_entry_address(void *entry)
-{
-	writel((u32)entry,
-	       SUNXI_SRAMC_BASE + SUN8I_R40_SRAMC_SOFT_ENTRY_REG0);
-}
-#else
-static void __secure sunxi_set_entry_address(void *entry)
+static void __secure sunxi_cpu_set_power(int cpu, bool on)
 {
+	u32 *clamp = NULL;
+	u32 *pwroff;
 	struct sunxi_cpucfg_reg *cpucfg =
 		(struct sunxi_cpucfg_reg *)SUNXI_CPUCFG_BASE;
 
-	writel((u32)entry, &cpucfg->priv0);
-}
-#endif
+	/* sun7i (A20) is different from other single cluster SoCs */
+	if (IS_ENABLED(CONFIG_MACH_SUN7I)) {
+		clamp = &cpucfg->cpu1_pwr_clamp;
+		pwroff = &cpucfg->cpu1_pwroff;
+		cpu = 0;
+	} else if (IS_ENABLED(CONFIG_MACH_SUN8I_R40)) {
+		clamp = (void *)cpucfg + SUN8I_R40_PWR_CLAMP(cpu);
+		pwroff = (void *)cpucfg + SUN8I_R40_PWROFF;
+	} else {
+		struct sunxi_prcm_reg *prcm =
+			(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
 
-#ifdef CONFIG_MACH_SUN7I
-/* sun7i (A20) is different from other single cluster SoCs */
-static void __secure sunxi_cpu_set_power(int __always_unused cpu, bool on)
-{
-	struct sunxi_cpucfg_reg *cpucfg =
-		(struct sunxi_cpucfg_reg *)SUNXI_CPUCFG_BASE;
+		if (IS_ENABLED(CONFIG_MACH_SUN6I) ||
+		    IS_ENABLED(CONFIG_MACH_SUN8I_H3))
+			clamp = &prcm->cpu_pwr_clamp[cpu];
 
-	sunxi_power_switch(&cpucfg->cpu1_pwr_clamp, &cpucfg->cpu1_pwroff,
-			   on, 0);
-}
-#elif defined CONFIG_MACH_SUN8I_R40
-static void __secure sunxi_cpu_set_power(int cpu, bool on)
-{
-	struct sunxi_cpucfg_reg *cpucfg =
-		(struct sunxi_cpucfg_reg *)SUNXI_CPUCFG_BASE;
+		pwroff = &prcm->cpu_pwroff;
+	}
 
-	sunxi_power_switch((void *)cpucfg + SUN8I_R40_PWR_CLAMP(cpu),
-			   (void *)cpucfg + SUN8I_R40_PWROFF,
-			   on, cpu);
-}
-#else /* ! CONFIG_MACH_SUN7I && ! CONFIG_MACH_SUN8I_R40 */
-static void __secure sunxi_cpu_set_power(int cpu, bool on)
-{
-	struct sunxi_prcm_reg *prcm =
-		(struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
+	if (on) {
+		/* Release power clamp */
+		if (clamp)
+			clamp_release(clamp);
 
-	sunxi_power_switch(&prcm->cpu_pwr_clamp[cpu], &prcm->cpu_pwroff,
-			   on, cpu);
+		/* Clear power gating */
+		clrbits_le32(pwroff, BIT(cpu));
+	} else {
+		/* Set power gating */
+		setbits_le32(pwroff, BIT(cpu));
+
+		/* Activate power clamp */
+		if (clamp)
+			clamp_set(clamp);
+	}
 }
-#endif /* CONFIG_MACH_SUN7I */
 
 void __secure sunxi_cpu_power_off(u32 cpuid)
 {
-- 
2.41.0