powerpc/mpic: remove unused functions

Drop unused fsl_mpic_primary_get_version(), mpic_set_clk_ratio(),
mpic_set_serial_int().

+ fsl_mpic_primary_get_version() is just a safe wrapper around
fsl_mpic_get_version() for SMP configurations. While the latter is
called explicitly for handling PIC initialization and setting up error
interrupt vector depending on PIC hardware version, the former isn't
used for anything.

+ As for mpic_set_clk_ratio() and mpic_set_serial_int(), they both are
almost nine years old[1] but still have no chance to be called even from
out-of-tree modules because they both are __init and of course aren't
exported.

[1] https://lists.ozlabs.org/pipermail/linuxppc-dev/2006-June/023867.html

Signed-off-by: Arseny Solokha <[e-mail]>
Cc: [e-mail]
Signed-off-by: Michael Ellerman <[e-mail]>

arch/powerpc/include/asm/mpic.h

···
 #define		MPIC_GREG_GCONF_BASE_MASK		0x000fffff
 #define		MPIC_GREG_GCONF_MCK			0x08000000
 #define MPIC_GREG_GLOBAL_CONF_1		0x00030
-#define		MPIC_GREG_GLOBAL_CONF_1_SIE		0x08000000
-#define		MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK	0x70000000
-#define		MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(r)	\
-			(((r) << 28) & MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK)
 #define MPIC_GREG_VENDOR_0		0x00040
 #define MPIC_GREG_VENDOR_1		0x00050
 #define MPIC_GREG_VENDOR_2		0x00060
···
 #define	MPIC_REGSET_STANDARD		MPIC_REGSET(0)	/* Original MPIC */
 #define	MPIC_REGSET_TSI108		MPIC_REGSET(1)	/* Tsi108/109 PIC */
 
-/* Get the version of primary MPIC */
-#ifdef CONFIG_MPIC
-extern u32 fsl_mpic_primary_get_version(void);
-#else
-static inline u32 fsl_mpic_primary_get_version(void)
-{
-	return 0;
-}
-#endif
-
 /* Allocate the controller structure and setup the linux irq descs
  * for the range if interrupts passed in. No HW initialization is
  * actually performed.
···
 extern unsigned int mpic_get_coreint_irq(void);
 /* Fetch Machine Check interrupt from primary mpic */
 extern unsigned int mpic_get_mcirq(void);
-
-/* Set the EPIC clock ratio */
-void mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio);
-
-/* Enable/Disable EPIC serial interrupt mode */
-void mpic_set_serial_int(struct mpic *mpic, int enable);
 
 #endif /* __KERNEL__ */
 #endif	/* _ASM_POWERPC_MPIC_H */

arch/powerpc/sysdev/mpic.c

···
  * Exported functions
  */
 
-u32 fsl_mpic_primary_get_version(void)
-{
-	struct mpic *mpic = mpic_primary;
-
-	if (mpic)
-		return fsl_mpic_get_version(mpic);
-
-	return 0;
-}
-
 struct mpic * __init mpic_alloc(struct device_node *node,
 				phys_addr_t phys_addr,
 				unsigned int flags,
···
 	/* FSL mpic error interrupt intialization */
 	if (mpic->flags & MPIC_FSL_HAS_EIMR)
 		mpic_err_int_init(mpic, MPIC_FSL_ERR_INT);
-}
-
-void __init mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio)
-{
-	u32 v;
-
-	v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
-	v &= ~MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK;
-	v |= MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(clock_ratio);
-	mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
-}
-
-void __init mpic_set_serial_int(struct mpic *mpic, int enable)
-{
-	unsigned long flags;
-	u32 v;
-
-	raw_spin_lock_irqsave(&mpic_lock, flags);
-	v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
-	if (enable)
-		v |= MPIC_GREG_GLOBAL_CONF_1_SIE;
-	else
-		v &= ~MPIC_GREG_GLOBAL_CONF_1_SIE;
-	mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
-	raw_spin_unlock_irqrestore(&mpic_lock, flags);
 }
 
 void mpic_irq_set_priority(unsigned int irq, unsigned int pri)