[U-Boot] [PATCH 2/3] mxs: generalize code for print_cpuinfo()
Otavio Salvador
otavio at ossystems.com.br
Sun Jun 17 14:58:08 CEST 2012
The information now is gathered from HW_DIGCTL_CHIPID register and
includes the revision of the chip on the output.
Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
Cc: Marek Vasut <marex at denx.de>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Fabio Estevam <fabio.estevam at freescale.com>
---
arch/arm/cpu/arm926ejs/mx28/mx28.c | 29 +++++++++++++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/mx28/mx28.c b/arch/arm/cpu/arm926ejs/mx28/mx28.c
index a82ff25..ac2f2e0 100644
--- a/arch/arm/cpu/arm926ejs/mx28/mx28.c
+++ b/arch/arm/cpu/arm926ejs/mx28/mx28.c
@@ -190,13 +190,38 @@ int arch_cpu_init(void)
#endif
#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) >> 16) {
+ case 0x2800:
+ return "28";
+ case 0x3728:
+ return "23";
+ default:
+ return "<unidentified>";
+ }
+}
+
+static u8 get_cpu_rev(void)
+{
+ struct mx28_digctl_regs *digctl_regs =
+ (struct mx28_digctl_regs *)MXS_DIGCTL_BASE;
+
+ return readl(&digctl_regs->hw_digctl_chipid) & 0x0000F;
+}
+
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%d 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;
}
--
1.7.10
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