Commit 48d55441 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'timer' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc 



Pull "ARM: timer cleanup work" from Arnd Bergmann:
 "These are split out from the generic soc and driver updates because
  there was a lot of conflicting work by multiple people.  Marc Zyngier
  worked on simplifying the "localtimer" interfaces, and some of the
  platforms are touching the same code as they move to device tree based
  booting.

  Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de&gt;">

* tag 'timer' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (61 commits)
  ARM: tegra: select USB_ULPI if USB is selected
  arm/tegra: pcie: fix return value of function
  ARM: ux500: fix compilation after local timer rework
  ARM: shmobile: remove additional __io() macro use
  ARM: local timers: make the runtime registration interface mandatory
  ARM: local timers: convert MSM to runtime registration interface
  ARM: local timers: convert exynos to runtime registration interface
  ARM: smp_twd: remove old local timer interface
  ARM: imx6q: convert to twd_local_timer_register() interface
  ARM: highbank: convert to twd_local_timer_register() interface
  ARM: ux500: convert to twd_local_timer_register() interface
  ARM: shmobile: convert to twd_local_timer_register() interface
  ARM: tegra: convert to twd_local_timer_register() interface
  ARM: plat-versatile: convert to twd_local_timer_register() interface
  ARM: OMAP4: convert to twd_local_timer_register() interface
  ARM: smp_twd: add device tree support
  ARM: smp_twd: add runtime registration support
  ARM: local timers: introduce a new registration interface
  ARM: smp_twd: make local_timer_stop a symbol instead of a #define
  ARM: mach-shmobile: default to no earlytimer
  ...
parents d61b7a57 2cbe23e3

Documentation/devicetree/bindings/arm/twd.txt

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+48 −0
Original line number Diff line number Diff line 
* ARM Timer Watchdog



ARM 11MP, Cortex-A5 and Cortex-A9 are often associated with a per-core

Timer-Watchdog (aka TWD), which provides both a per-cpu local timer

and watchdog.



The TWD is usually attached to a GIC to deliver its two per-processor

interrupts.



** Timer node required properties:



- compatible : Should be one of:

	"arm,cortex-a9-twd-timer"

	"arm,cortex-a5-twd-timer"

	"arm,arm11mp-twd-timer"



- interrupts : One interrupt to each core



- reg : Specify the base address and the size of the TWD timer

	register window.



Example:



	twd-timer@2c000600 {

		compatible = "arm,arm11mp-twd-timer"";

		reg = <0x2c000600 0x20>;

		interrupts = <1 13 0xf01>;

	};



** Watchdog node properties:



- compatible : Should be one of:

	"arm,cortex-a9-twd-wdt"

	"arm,cortex-a5-twd-wdt"

	"arm,arm11mp-twd-wdt"



- interrupts : One interrupt to each core



- reg : Specify the base address and the size of the TWD watchdog

	register window.



Example:



	twd-watchdog@2c000620 {

		compatible = "arm,arm11mp-twd-wdt";

		reg = <0x2c000620 0x20>;

		interrupts = <1 14 0xf01>;

	};

arch/arm/boot/dts/highbank.dts

+4 −4
Original line number Diff line number Diff line
@@ -72,15 +72,15 @@ 
		ranges;



		timer@fff10600 {

			compatible = "arm,smp-twd";

			compatible = "arm,cortex-a9-twd-timer";

			reg = <0xfff10600 0x20>;

			interrupts = <1 13 0xf04>;

			interrupts = <1 13 0xf01>;

		};



		watchdog@fff10620 {

			compatible = "arm,cortex-a9-wdt";

			compatible = "arm,cortex-a9-twd-wdt";

			reg = <0xfff10620 0x20>;

			interrupts = <1 14 0xf04>;

			interrupts = <1 14 0xf01>;

		};



		intc: interrupt-controller@fff11000 {

arch/arm/boot/dts/imx6q.dtsi

+3 −3
Original line number Diff line number Diff line
@@ -88,9 +88,9 @@ 
		ranges;



		timer@00a00600 {

			compatible = "arm,smp-twd";

			reg = <0x00a00600 0x100>;

			interrupts = <1 13 0xf4>;

			compatible = "arm,cortex-a9-twd-timer";

			reg = <0x00a00600 0x20>;

			interrupts = <1 13 0xf01>;

		};



		L2: l2-cache@00a02000 {

arch/arm/include/asm/hardware/arm_timer.h

+5 −0
Original line number Diff line number Diff line
@@ -9,7 +9,12 @@ 
 *

 * Integrator AP has 16-bit timers, Integrator CP, Versatile and Realview

 * can have 16-bit or 32-bit selectable via a bit in the control register.

 *

 * Every SP804 contains two identical timers.

 */

#define TIMER_1_BASE	0x00

#define TIMER_2_BASE	0x20



#define TIMER_LOAD	0x00			/* ACVR rw */

#define TIMER_VALUE	0x04			/* ACVR ro */

#define TIMER_CTRL	0x08			/* ACVR rw */

arch/arm/include/asm/localtimer.h

+7 −30
Original line number Diff line number Diff line
@@ -11,47 +11,24 @@ 
#define __ASM_ARM_LOCALTIMER_H



#include <linux/errno.h>

#include <linux/interrupt.h>



struct clock_event_device;



/*

 * Setup a per-cpu timer, whether it be a local timer or dummy broadcast

 */

void percpu_timer_setup(void);

struct local_timer_ops {

	int  (*setup)(struct clock_event_device *);

	void (*stop)(struct clock_event_device *);

};



#ifdef CONFIG_LOCAL_TIMERS



#ifdef CONFIG_HAVE_ARM_TWD



#include "smp_twd.h"



#define local_timer_stop(c)	twd_timer_stop((c))



#else



/*

 * Stop the local timer

 */

void local_timer_stop(struct clock_event_device *);



#endif



/*

 * Setup a local timer interrupt for a CPU.

 * Register a local timer driver

 */

int local_timer_setup(struct clock_event_device *);



int local_timer_register(struct local_timer_ops *);

#else



static inline int local_timer_setup(struct clock_event_device *evt)

static inline int local_timer_register(struct local_timer_ops *ops)

{

	return -ENXIO;

}



static inline void local_timer_stop(struct clock_event_device *evt)

{

}

#endif



#endif

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