dm: x86: Allow TSC timer to be used before DM is ready
With bootstage we need access to the timer before driver model is set up.
To handle this, put the required state in global_data and provide a new
function to set up the device, separate from the driver's probe() method.
This will be used by the 'early' timer also.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h
index 93a80fe..fcb6853 100644
--- a/arch/x86/include/asm/global_data.h
+++ b/arch/x86/include/asm/global_data.h
@@ -77,6 +77,7 @@
uint8_t x86_mask;
uint32_t x86_device;
uint64_t tsc_base; /* Initial value returned by rdtsc() */
+ unsigned long clock_rate; /* Clock rate of timer in Hz */
void *new_fdt; /* Relocated FDT */
uint32_t bist; /* Built-in self test value */
enum pei_boot_mode_t pei_boot_mode;