[U-Boot] [PATCH 2/3] mxs: generalize code for print_cpuinfo()

[Otavio Salvador]

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 <ota...@ossystems.com.br>
Cc: Marek Vasut <ma...@denx.de>
Cc: Stefano Babic <sba...@denx.de>
Cc: Fabio Estevam <fabio.este...@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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