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pxa: Add code to examine cpu model and revision

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Add function which return CPU model and revision which can be used for
cpu detection.

Signed-off-by: Lukasz Dalek <luk0104@gmail.com>
This commit is contained in:
Lukasz Dalek 2012-10-03 00:51:06 +02:00 committed by Tom Rini
parent c0720afbb5
commit 539e9ffd92
2 changed files with 22 additions and 2 deletions
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11
arch/arm/cpu/pxa/cpuinfo.c
View file

@ -24,9 +24,11 @@
#include <errno.h>
#include <linux/compiler.h>
#define CPU_MASK_PXA_REVID 0x00f
#define CPU_MASK_PXA_PRODID 0x000003f0
#define CPU_MASK_PXA_REVID 0x0000000f
#define CPU_MASK_PRODREV (CPU_MASK_PXA_PRODID | CPU_MASK_PXA_REVID)
#define CPU_MASK_PXA_PRODID 0x3f0
#define CPU_VALUE_PXA25X 0x100
#define CPU_VALUE_PXA27X 0x110
@ -51,6 +53,11 @@ int cpu_is_pxa27x(void)
return id == CPU_VALUE_PXA27X;
}
uint32_t pxa_get_cpu_revision(void)
{
return pxa_get_cpuid() & CPU_MASK_PRODREV;
}
#ifdef CONFIG_DISPLAY_CPUINFO
static const char *pxa25x_get_revision(void)
{

13
arch/arm/include/asm/arch-pxa/pxa.h
View file

@ -22,8 +22,21 @@
#ifndef __PXA_H__
#define __PXA_H__
#define PXA255_A0 0x00000106
#define PXA250_C0 0x00000105
#define PXA250_B2 0x00000104
#define PXA250_B1 0x00000103
#define PXA250_B0 0x00000102
#define PXA250_A1 0x00000101
#define PXA250_A0 0x00000100
#define PXA210_C0 0x00000125
#define PXA210_B2 0x00000124
#define PXA210_B1 0x00000123
#define PXA210_B0 0x00000122
int cpu_is_pxa25x(void);
int cpu_is_pxa27x(void);
uint32_t pxa_get_cpu_revision(void);
void pxa2xx_dram_init(void);
#endif /* __PXA_H__ */