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Commit 93e9cd84 authored by Manuel Lauss's avatar Manuel Lauss Committed by Ralf Baechle
Browse files

MIPS: Alchemy: Simple cpu subtype detector 



Extract the alchemy chip variant from c0_prid register.

Signed-off-by: default avatarManuel Lauss <manuel.lauss@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/14/
Patchwork: http://patchwork.linux-mips.org/patch/707/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 0a0b1295

arch/mips/include/asm/mach-au1x00/au1000.h

+31 −0
Original line number Diff line number Diff line
@@ -130,6 +130,37 @@ static inline int au1xxx_cpu_needs_config_od(void) 
	return 0;

}



#define ALCHEMY_CPU_UNKNOWN	-1

#define ALCHEMY_CPU_AU1000	0

#define ALCHEMY_CPU_AU1500	1

#define ALCHEMY_CPU_AU1100	2

#define ALCHEMY_CPU_AU1550	3

#define ALCHEMY_CPU_AU1200	4



static inline int alchemy_get_cputype(void)

{

	switch (read_c0_prid() & 0xffff0000) {

	case 0x00030000:

		return ALCHEMY_CPU_AU1000;

		break;

	case 0x01030000:

		return ALCHEMY_CPU_AU1500;

		break;

	case 0x02030000:

		return ALCHEMY_CPU_AU1100;

		break;

	case 0x03030000:

		return ALCHEMY_CPU_AU1550;

		break;

	case 0x04030000:

	case 0x05030000:

		return ALCHEMY_CPU_AU1200;

		break;

	}



	return ALCHEMY_CPU_UNKNOWN;

}



/* arch/mips/au1000/common/clocks.c */

extern void set_au1x00_speed(unsigned int new_freq);

extern unsigned int get_au1x00_speed(void);