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Commit c39dae38 authored by Magnus Damm's avatar Magnus Damm Committed by Simon Horman
Browse files

ARM: shmobile: Add shared shmobile_init_delay() 



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: default avatarMagnus Damm <damm@opensource.se>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent ce4b6a04

arch/arm/mach-shmobile/include/mach/common.h

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
extern void shmobile_earlytimer_init(void);

extern void shmobile_setup_delay(unsigned int max_cpu_core_mhz,

			 unsigned int mult, unsigned int div);

extern void shmobile_init_delay(void);

struct twd_local_timer;

extern void shmobile_setup_console(void);

extern void shmobile_boot_vector(void);

arch/arm/mach-shmobile/timer.c

+28 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/platform_device.h>

#include <linux/clocksource.h>

#include <linux/delay.h>

#include <linux/of_address.h>



void __init shmobile_setup_delay(unsigned int max_cpu_core_mhz,

				 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;

}



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)

{

	/*