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Diffstat (limited to 'arch/arm/mach-shmobile/timer.c')
-rw-r--r--arch/arm/mach-shmobile/timer.c52
1 files changed, 20 insertions, 32 deletions
diff --git a/arch/arm/mach-shmobile/timer.c b/arch/arm/mach-shmobile/timer.c
index 67d79f9c6..6196a6380 100644
--- a/arch/arm/mach-shmobile/timer.c
+++ b/arch/arm/mach-shmobile/timer.c
@@ -20,28 +20,9 @@
#include "common.h"
-static void __init shmobile_setup_delay_hz(unsigned int max_cpu_core_hz,
- unsigned int mult, unsigned int div)
-{
- /* calculate a worst-case loops-per-jiffy value
- * based on maximum cpu core hz setting and the
- * __delay() implementation in arch/arm/lib/delay.S
- *
- * this will result in a longer delay than expected
- * when the cpu core runs on lower frequencies.
- */
-
- unsigned int value = HZ * div / mult;
-
- if (!preset_lpj)
- preset_lpj = max_cpu_core_hz / value;
-}
-
void __init shmobile_init_delay(void)
{
struct device_node *np, *cpus;
- unsigned int div = 0;
- bool has_arch_timer = false;
u32 max_freq = 0;
cpus = of_find_node_by_path("/cpus");
@@ -51,25 +32,32 @@ void __init shmobile_init_delay(void)
for_each_child_of_node(cpus, np) {
u32 freq;
+ if (IS_ENABLED(CONFIG_ARM_ARCH_TIMER) &&
+ (of_device_is_compatible(np, "arm,cortex-a7") ||
+ of_device_is_compatible(np, "arm,cortex-a15"))) {
+ of_node_put(np);
+ of_node_put(cpus);
+ return;
+ }
+
if (!of_property_read_u32(np, "clock-frequency", &freq))
max_freq = max(max_freq, freq);
-
- if (of_device_is_compatible(np, "arm,cortex-a8")) {
- div = 2;
- } else if (of_device_is_compatible(np, "arm,cortex-a9")) {
- div = 1;
- } else if (of_device_is_compatible(np, "arm,cortex-a7") ||
- of_device_is_compatible(np, "arm,cortex-a15")) {
- div = 1;
- has_arch_timer = true;
- }
}
of_node_put(cpus);
- if (!max_freq || !div)
+ if (!max_freq)
return;
- if (!has_arch_timer || !IS_ENABLED(CONFIG_ARM_ARCH_TIMER))
- shmobile_setup_delay_hz(max_freq, 1, div);
+ /*
+ * Calculate a worst-case loops-per-jiffy value
+ * based on maximum cpu core hz setting and the
+ * __delay() implementation in arch/arm/lib/delay.S.
+ *
+ * This will result in a longer delay than expected
+ * when the cpu core runs on lower frequencies.
+ */
+
+ if (!preset_lpj)
+ preset_lpj = max_freq / HZ;
}