x86: tsc: Rename X86_TSC_TIMER_EARLY_FREQ to X86_TSC_TIMER_FREQ

Currently there are two places to specify the x86 TSC timer frequency
with one in Kconfig used for early timer and the other one in device
tree used when the frequency cannot be determined from hardware.

This may potentially create an inconsistent config where the 2 values
do not match. Let's use the one specified in Kconfig in the device
tree as well.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/cpu/quark/Kconfig b/arch/x86/cpu/quark/Kconfig
index 430cce1..61bb579 100644 (file)
--- a/arch/x86/cpu/quark/Kconfig
+++ b/arch/x86/cpu/quark/Kconfig
@@ -130,8 +130,8 @@ config SYS_CAR_SIZE
          Space in bytes in eSRAM used as Cache-As-ARM (CAR).
          Note this size must not exceed eSRAM's total size.
 
-config X86_TSC_TIMER_EARLY_FREQ
+config X86_TSC_TIMER_FREQ
        int
-       default 400
+       default 400000000
 
 endif

diff --git a/arch/x86/dts/galileo.dts b/arch/x86/dts/galileo.dts
index 5010471..b5ba118 100644 (file)
--- a/arch/x86/dts/galileo.dts
+++ b/arch/x86/dts/galileo.dts
@@ -42,7 +42,7 @@
        };
 
        tsc-timer {
-               clock-frequency = <400000000>;
+               clock-frequency = <CONFIG_X86_TSC_TIMER_FREQ>;
        };
 
        mrc {

diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index ee81dfa..8913142 100644 (file)
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -124,12 +124,12 @@ config RENESAS_OSTM_TIMER
          Enables support for the Renesas OSTM Timer driver.
          This timer is present on Renesas RZ/A1 R7S72100 SoCs.
 
-config X86_TSC_TIMER_EARLY_FREQ
-       int "x86 TSC timer frequency in MHz when used as the early timer"
+config X86_TSC_TIMER_FREQ
+       int "x86 TSC timer frequency in Hz"
        depends on X86_TSC_TIMER
-       default 1000
+       default 1000000000
        help
-         Sets the estimated CPU frequency in MHz when TSC is used as the
+         Sets the estimated CPU frequency in Hz when TSC is used as the
          early timer and the frequency can neither be calibrated via some
          hardware ways, nor got from device tree at the time when device
          tree is not available yet.

diff --git a/drivers/timer/tsc_timer.c b/drivers/timer/tsc_timer.c
index 7d19a99..adef50c 100644 (file)
--- a/drivers/timer/tsc_timer.c
+++ b/drivers/timer/tsc_timer.c
@@ -425,12 +425,13 @@ static void tsc_timer_ensure_setup(bool early)
                        goto done;
 
                if (early)
-                       fast_calibrate = CONFIG_X86_TSC_TIMER_EARLY_FREQ;
+                       gd->arch.clock_rate = CONFIG_X86_TSC_TIMER_FREQ;
                else
                        return;
 
 done:
-               gd->arch.clock_rate = fast_calibrate * 1000000;
+               if (!gd->arch.clock_rate)
+                       gd->arch.clock_rate = fast_calibrate * 1000000;
        }
        gd->arch.tsc_inited = true;
 }