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MX28: extend print_cpuinfo() to use chip information

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The information now is gathered from HW_DIGCTL_CHIPID register and
includes the chip modem and revision on the output.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
This commit is contained in:
Otavio Salvador 2012-07-28 11:43:47 +00:00 committed by Albert ARIBAUD
parent 7c5e6f7a5d
commit b0261b1212
2 changed files with 40 additions and 2 deletions
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38
arch/arm/cpu/arm926ejs/mx28/mx28.c
View File

@ -188,13 +188,47 @@ int arch_cpu_init(void)
}
#if defined(CONFIG_DISPLAY_CPUINFO)
static const char *get_cpu_type(void)
{
struct mx28_digctl_regs *digctl_regs =
(struct mx28_digctl_regs *)MXS_DIGCTL_BASE;
switch (readl(&digctl_regs->hw_digctl_chipid) & HW_DIGCTL_CHIPID_MASK) {
case HW_DIGCTL_CHIPID_MX28:
return "28";
default:
return "??";
}
}
static const char *get_cpu_rev(void)
{
struct mx28_digctl_regs *digctl_regs =
(struct mx28_digctl_regs *)MXS_DIGCTL_BASE;
uint8_t rev = readl(&digctl_regs->hw_digctl_chipid) & 0x000000FF;
switch (readl(&digctl_regs->hw_digctl_chipid) & HW_DIGCTL_CHIPID_MASK) {
case HW_DIGCTL_CHIPID_MX28:
switch (rev) {
case 0x1:
return "1.2";
default:
return "??";
}
default:
return "??";
}
}
int print_cpuinfo(void)
{
struct mx28_spl_data *data = (struct mx28_spl_data *)
((CONFIG_SYS_TEXT_BASE - sizeof(struct mx28_spl_data)) & ~0xf);
printf("Freescale i.MX28 family at %d MHz\n",
mxc_get_clock(MXC_ARM_CLK) / 1000000);
printf("CPU: Freescale i.MX%s rev%s at %d MHz\n",
get_cpu_type(),
get_cpu_rev(),
mxc_get_clock(MXC_ARM_CLK) / 1000000);
printf("BOOT: %s\n", mx28_boot_modes[data->boot_mode_idx].mode);
return 0;
}

4
arch/arm/include/asm/arch-mx28/regs-digctl.h
View File

@ -152,4 +152,8 @@ struct mx28_digctl_regs {
};
#endif
/* Product code identification */
#define HW_DIGCTL_CHIPID_MASK (0xffff << 16)
#define HW_DIGCTL_CHIPID_MX28 (0x2800 << 16)
#endif /* __MX28_REGS_DIGCTL_H__ */