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Commit 4a8355c4 authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Arnd Bergmann
Browse files

ARM: clps711x: convert to clockevents 



This patch converts CLPS711X-platform to use modern clockevent API.

Signed-off-by: default avatarAlexander Shiyan <shc_work@mail.ru>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent ddffeb8c

arch/arm/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -364,10 +364,10 @@ config ARCH_CNS3XXX 


config ARCH_CLPS711X

	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"

	select ARCH_USES_GETTIMEOFFSET

	select CLKDEV_LOOKUP

	select COMMON_CLK

	select CPU_ARM720T

	select GENERIC_CLOCKEVENTS

	select NEED_MACH_MEMORY_H

	help

	  Support for Cirrus Logic 711x/721x/731x based boards.

arch/arm/mach-clps711x/common.c

+17 −21
Original line number Diff line number Diff line
@@ -21,13 +21,14 @@ 
 */

#include <linux/io.h>

#include <linux/init.h>

#include <linux/sizes.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/clk.h>

#include <linux/clkdev.h>

#include <linux/clockchips.h>

#include <linux/clk-provider.h>



#include <asm/sizes.h>

#include <asm/mach/map.h>

#include <asm/mach/time.h>

#include <asm/system_misc.h>
@@ -36,7 +37,6 @@ 


static struct clk *clk_pll, *clk_bus, *clk_uart, *clk_timerl, *clk_timerh,

		  *clk_tint, *clk_spi;

static unsigned long latch;



/*

 * This maps the generic CLPS711x registers
@@ -158,32 +158,29 @@ void __init clps711x_init_irq(void) 
	clps_writel(0, KBDEOI);

}



/*

 * gettimeoffset() returns time since last timer tick, in usecs.

 *

 * 'LATCH' is hwclock ticks (see CLOCK_TICK_RATE in timex.h) per jiffy.

 * 'tick' is usecs per jiffy.

 */

static unsigned long clps711x_gettimeoffset(void)

static void clps711x_clockevent_set_mode(enum clock_event_mode mode,

					 struct clock_event_device *evt)

{

	unsigned long hwticks;

	hwticks = latch - (clps_readl(TC2D) & 0xffff);

	return (hwticks * (tick_nsec / 1000)) / latch;

}



/*

 * IRQ handler for the timer

 */

static irqreturn_t p720t_timer_interrupt(int irq, void *dev_id)

static struct clock_event_device clockevent_clps711x = {

	.name		= "CLPS711x Clockevents",

	.rating		= 300,

	.features	= CLOCK_EVT_FEAT_PERIODIC,

	.set_mode	= clps711x_clockevent_set_mode,

};



static irqreturn_t clps711x_timer_interrupt(int irq, void *dev_id)

{

	timer_tick();

	clockevent_clps711x.event_handler(&clockevent_clps711x);



	return IRQ_HANDLED;

}



static struct irqaction clps711x_timer_irq = {

	.name		= "CLPS711x Timer Tick",

	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,

	.handler	= p720t_timer_interrupt,

	.handler	= clps711x_timer_interrupt,

};



static void add_fixed_clk(struct clk *clk, const char *name, int rate)
@@ -244,20 +241,19 @@ static void __init clps711x_timer_init(void) 


	pr_info("CPU frequency set at %i Hz.\n", cpu);



	latch = (timh + HZ / 2) / HZ;

	clps_writew(DIV_ROUND_CLOSEST(timh, HZ), TC2D);



	tmp = clps_readl(SYSCON1);

	tmp |= SYSCON1_TC2S | SYSCON1_TC2M;

	clps_writel(tmp, SYSCON1);



	clps_writel(latch - 1, TC2D);

	clockevents_config_and_register(&clockevent_clps711x, timh, 1, 0xffff);



	setup_irq(IRQ_TC2OI, &clps711x_timer_irq);

}



struct sys_timer clps711x_timer = {

	.init		= clps711x_timer_init,

	.offset		= clps711x_gettimeoffset,

};



void clps711x_restart(char mode, const char *cmd)