MIPS: BCM63xx: Remove !RUNTIME_DETECT code for bcmcpu_get_id

Use the same pattern as with get_*_cpu_type() to allow the compiler
to remove code for non enabled SoC types.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: John Crispin <blogic@openwrt.org>
Cc: Maxime Bizon <mbizon@freebox.fr>
Cc: Florian Fainelli <florian@openwrt.org>
Cc: Kevin Cernekee <cernekee@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/7273/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/bcm63xx/cpu.c

@@ -24,7 +24,9 @@ EXPORT_SYMBOL(bcm63xx_regs_base);
 const int *bcm63xx_irqs;
 EXPORT_SYMBOL(bcm63xx_irqs);
 
-static u16 bcm63xx_cpu_id;
+u16 bcm63xx_cpu_id __read_mostly;
+EXPORT_SYMBOL(bcm63xx_cpu_id);
+
 static u8 bcm63xx_cpu_rev;
 static unsigned int bcm63xx_cpu_freq;
 static unsigned int bcm63xx_memory_size;
@@ -97,13 +99,6 @@ static const int bcm6368_irqs[] = {
 
 };
 
-u16 __bcm63xx_get_cpu_id(void)
-{
-	return bcm63xx_cpu_id;
-}
-
-EXPORT_SYMBOL(__bcm63xx_get_cpu_id);
-
 u8 bcm63xx_get_cpu_rev(void)
 {
 	return bcm63xx_cpu_rev;

arch/mips/include/asm/mach-bcm63xx/bcm63xx_cpu.h

@@ -19,118 +19,68 @@
 #define BCM6368_CPU_ID		0x6368
 
 void __init bcm63xx_cpu_init(void);
-u16 __bcm63xx_get_cpu_id(void);
 u8 bcm63xx_get_cpu_rev(void);
 unsigned int bcm63xx_get_cpu_freq(void);
 
+static inline u16 __pure __bcm63xx_get_cpu_id(const u16 cpu_id)
+{
+	switch (cpu_id) {
 #ifdef CONFIG_BCM63XX_CPU_3368
-# ifdef bcm63xx_get_cpu_id
-#  undef bcm63xx_get_cpu_id
-#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
-#  define BCMCPU_RUNTIME_DETECT
-# else
-#  define bcm63xx_get_cpu_id()	BCM3368_CPU_ID
-# endif
-# define BCMCPU_IS_3368()	(bcm63xx_get_cpu_id() == BCM3368_CPU_ID)
-#else
-# define BCMCPU_IS_3368()	(0)
+		case BCM3368_CPU_ID:
 #endif
 
 #ifdef CONFIG_BCM63XX_CPU_6328
-# ifdef bcm63xx_get_cpu_id
-#  undef bcm63xx_get_cpu_id
-#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
-#  define BCMCPU_RUNTIME_DETECT
-# else
-#  define bcm63xx_get_cpu_id()	BCM6328_CPU_ID
-# endif
-# define BCMCPU_IS_6328()	(bcm63xx_get_cpu_id() == BCM6328_CPU_ID)
-#else
-# define BCMCPU_IS_6328()	(0)
+		case BCM6328_CPU_ID:
 #endif
 
 #ifdef CONFIG_BCM63XX_CPU_6338
-# ifdef bcm63xx_get_cpu_id
-#  undef bcm63xx_get_cpu_id
-#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
-#  define BCMCPU_RUNTIME_DETECT
-# else
-#  define bcm63xx_get_cpu_id()	BCM6338_CPU_ID
-# endif
-# define BCMCPU_IS_6338()	(bcm63xx_get_cpu_id() == BCM6338_CPU_ID)
-#else
-# define BCMCPU_IS_6338()	(0)
+		case BCM6338_CPU_ID:
 #endif
 
 #ifdef CONFIG_BCM63XX_CPU_6345
-# ifdef bcm63xx_get_cpu_id
-#  undef bcm63xx_get_cpu_id
-#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
-#  define BCMCPU_RUNTIME_DETECT
-# else
-#  define bcm63xx_get_cpu_id()	BCM6345_CPU_ID
-# endif
-# define BCMCPU_IS_6345()	(bcm63xx_get_cpu_id() == BCM6345_CPU_ID)
-#else
-# define BCMCPU_IS_6345()	(0)
+		case BCM6345_CPU_ID:
 #endif
 
 #ifdef CONFIG_BCM63XX_CPU_6348
-# ifdef bcm63xx_get_cpu_id
-#  undef bcm63xx_get_cpu_id
-#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
-#  define BCMCPU_RUNTIME_DETECT
-# else
-#  define bcm63xx_get_cpu_id()	BCM6348_CPU_ID
-# endif
-# define BCMCPU_IS_6348()	(bcm63xx_get_cpu_id() == BCM6348_CPU_ID)
-#else
-# define BCMCPU_IS_6348()	(0)
+		case BCM6348_CPU_ID:
 #endif
 
 #ifdef CONFIG_BCM63XX_CPU_6358
-# ifdef bcm63xx_get_cpu_id
-#  undef bcm63xx_get_cpu_id
-#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
-#  define BCMCPU_RUNTIME_DETECT
-# else
-#  define bcm63xx_get_cpu_id()	BCM6358_CPU_ID
-# endif
-# define BCMCPU_IS_6358()	(bcm63xx_get_cpu_id() == BCM6358_CPU_ID)
-#else
-# define BCMCPU_IS_6358()	(0)
+		case BCM6358_CPU_ID:
 #endif
 
 #ifdef CONFIG_BCM63XX_CPU_6362
-# ifdef bcm63xx_get_cpu_id
-#  undef bcm63xx_get_cpu_id
-#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
-#  define BCMCPU_RUNTIME_DETECT
-# else
-#  define bcm63xx_get_cpu_id()	BCM6362_CPU_ID
-# endif
-# define BCMCPU_IS_6362()	(bcm63xx_get_cpu_id() == BCM6362_CPU_ID)
-#else
-# define BCMCPU_IS_6362()	(0)
+		case BCM6362_CPU_ID:
 #endif
 
-
 #ifdef CONFIG_BCM63XX_CPU_6368
-# ifdef bcm63xx_get_cpu_id
-#  undef bcm63xx_get_cpu_id
-#  define bcm63xx_get_cpu_id()	__bcm63xx_get_cpu_id()
-#  define BCMCPU_RUNTIME_DETECT
-# else
-#  define bcm63xx_get_cpu_id()	BCM6368_CPU_ID
-# endif
-# define BCMCPU_IS_6368()	(bcm63xx_get_cpu_id() == BCM6368_CPU_ID)
-#else
-# define BCMCPU_IS_6368()	(0)
+		case BCM6368_CPU_ID:
 #endif
+		break;
+	default:
+		unreachable();
+	}
 
-#ifndef bcm63xx_get_cpu_id
-#error "No CPU support configured"
-#endif
+	return cpu_id;
+}
+
+extern u16 bcm63xx_cpu_id;
+
+static inline u16 __pure bcm63xx_get_cpu_id(void)
+{
+	const u16 cpu_id = bcm63xx_cpu_id;
+
+	return __bcm63xx_get_cpu_id(cpu_id);
+}
+
+#define BCMCPU_IS_3368()	(bcm63xx_get_cpu_id() == BCM3368_CPU_ID)
+#define BCMCPU_IS_6328()	(bcm63xx_get_cpu_id() == BCM6328_CPU_ID)
+#define BCMCPU_IS_6338()	(bcm63xx_get_cpu_id() == BCM6338_CPU_ID)
+#define BCMCPU_IS_6345()	(bcm63xx_get_cpu_id() == BCM6345_CPU_ID)
+#define BCMCPU_IS_6348()	(bcm63xx_get_cpu_id() == BCM6348_CPU_ID)
+#define BCMCPU_IS_6358()	(bcm63xx_get_cpu_id() == BCM6358_CPU_ID)
+#define BCMCPU_IS_6362()	(bcm63xx_get_cpu_id() == BCM6362_CPU_ID)
+#define BCMCPU_IS_6368()	(bcm63xx_get_cpu_id() == BCM6368_CPU_ID)
 
 /*
  * While registers sets are (mostly) the same across 63xx CPU, base