mirror of
https://github.com/torvalds/linux.git
synced 2024-11-02 10:11:36 +00:00
ab116a86fa
Update to use generic function for displaying silicon revision Tested on mx31pdk board as print the following information: CPU identified as i.MX31, silicon rev 2.0 Signed-off-by: Jason Liu <jason.hui@linaro.org> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/*
|
|
* MX31 CPU type detection
|
|
*
|
|
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/io.h>
|
|
#include <mach/hardware.h>
|
|
#include <mach/iim.h>
|
|
#include <mach/common.h>
|
|
|
|
static int mx31_cpu_rev = -1;
|
|
|
|
static struct {
|
|
u8 srev;
|
|
const char *name;
|
|
unsigned int rev;
|
|
} mx31_cpu_type[] = {
|
|
{ .srev = 0x00, .name = "i.MX31(L)", .rev = IMX_CHIP_REVISION_1_0 },
|
|
{ .srev = 0x10, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 },
|
|
{ .srev = 0x11, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 },
|
|
{ .srev = 0x12, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_1 },
|
|
{ .srev = 0x13, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_1 },
|
|
{ .srev = 0x14, .name = "i.MX31", .rev = IMX_CHIP_REVISION_1_2 },
|
|
{ .srev = 0x15, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_1_2 },
|
|
{ .srev = 0x28, .name = "i.MX31", .rev = IMX_CHIP_REVISION_2_0 },
|
|
{ .srev = 0x29, .name = "i.MX31L", .rev = IMX_CHIP_REVISION_2_0 },
|
|
};
|
|
|
|
static int mx31_read_cpu_rev(void)
|
|
{
|
|
u32 i, srev;
|
|
|
|
/* read SREV register from IIM module */
|
|
srev = __raw_readl(MX31_IO_ADDRESS(MX31_IIM_BASE_ADDR + MXC_IIMSREV));
|
|
srev &= 0xff;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(mx31_cpu_type); i++)
|
|
if (srev == mx31_cpu_type[i].srev) {
|
|
imx_print_silicon_rev(mx31_cpu_type[i].name,
|
|
mx31_cpu_type[i].rev);
|
|
return mx31_cpu_type[i].rev;
|
|
}
|
|
|
|
imx_print_silicon_rev("i.MX31", IMX_CHIP_REVISION_UNKNOWN);
|
|
return IMX_CHIP_REVISION_UNKNOWN;
|
|
}
|
|
|
|
int mx31_revision(void)
|
|
{
|
|
if (mx31_cpu_rev == -1)
|
|
mx31_cpu_rev = mx31_read_cpu_rev();
|
|
|
|
return mx31_cpu_rev;
|
|
}
|
|
EXPORT_SYMBOL(mx31_revision);
|