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ARM: shmobile: Add shared shmobile_init_delay()

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Introduce shmobile_init_delay() that gets CPU specific
parameters from DT and sets up the early delay from
there. This allows us to both remove frequency information
from the C code and consolidate existing code.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Magnus Damm 2014-03-06 12:28:24 +09:00 committed by Simon Horman
parent ce4b6a04c4
commit c39dae380b
2 changed files with 29 additions and 0 deletions
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1
arch/arm/mach-shmobile/include/mach/common.h
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@ -4,6 +4,7 @@
extern void shmobile_earlytimer_init(void); extern void shmobile_earlytimer_init(void);
extern void shmobile_setup_delay(unsigned int max_cpu_core_mhz, extern void shmobile_setup_delay(unsigned int max_cpu_core_mhz,
unsigned int mult, unsigned int div); unsigned int mult, unsigned int div);
extern void shmobile_init_delay(void);
struct twd_local_timer; struct twd_local_timer;
extern void shmobile_setup_console(void); extern void shmobile_setup_console(void);
extern void shmobile_boot_vector(void); extern void shmobile_boot_vector(void);

28
arch/arm/mach-shmobile/timer.c
View File

@ -21,6 +21,7 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/clocksource.h> #include <linux/clocksource.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/of_address.h>
void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz, void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz,
unsigned int mult, unsigned int div) unsigned int mult, unsigned int div)
@ -39,6 +40,33 @@ void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz,
preset_lpj = max_cpu_core_mhz * value; preset_lpj = max_cpu_core_mhz * value;
} }
void __init shmobile_init_delay(void)
{
struct device_node *np, *parent;
u32 max_freq, freq;
max_freq = 0;
parent = of_find_node_by_path("/cpus");
if (parent) {
for_each_child_of_node(parent, np) {
if (!of_property_read_u32(np, "clock-frequency", &freq))
max_freq = max(max_freq, freq);
}
of_node_put(parent);
}
if (max_freq) {
if (of_find_compatible_node(NULL, NULL, "arm,cortex-a8"))
shmobile_setup_delay(max_freq, 1, 3);
else if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
shmobile_setup_delay(max_freq, 1, 3);
else if (of_find_compatible_node(NULL, NULL, "arm,cortex-a15"))
if (!IS_ENABLED(CONFIG_ARM_ARCH_TIMER))
shmobile_setup_delay(max_freq, 2, 4);
}
}
static void __init shmobile_late_time_init(void) static void __init shmobile_late_time_init(void)
{ {
/* /*