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Commit 908b75e8 authored by Tero Kristo's avatar Tero Kristo Committed by Kevin Hilman
Browse files

ARM: OMAP: add support for oscillator setup 



This contains startup and shutdown times for the oscillator. By default
use ULONG_MAX. Oscillator setup is used for calculating and setting up
latencies for sleep modes that disable oscillator.

Based on a patch from Nishanth Menon <nm@ti.com>.

Signed-off-by: default avatarTero Kristo <t-kristo@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@ti.com>
parent 9a1729cb

arch/arm/mach-omap2/pm.c

+30 −0
Original line number Diff line number Diff line
@@ -39,6 +39,36 @@ static struct omap_device_pm_latency *pm_lats; 
 */

int (*omap_pm_suspend)(void);



/**

 * struct omap2_oscillator - Describe the board main oscillator latencies

 * @startup_time: oscillator startup latency

 * @shutdown_time: oscillator shutdown latency

 */

struct omap2_oscillator {

	u32 startup_time;

	u32 shutdown_time;

};



static struct omap2_oscillator oscillator = {

	.startup_time = ULONG_MAX,

	.shutdown_time = ULONG_MAX,

};



void omap_pm_setup_oscillator(u32 tstart, u32 tshut)

{

	oscillator.startup_time = tstart;

	oscillator.shutdown_time = tshut;

}



void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)

{

	if (!tstart || !tshut)

		return;



	*tstart = oscillator.startup_time;

	*tshut = oscillator.shutdown_time;

}



static int __init _init_omap_device(char *name)

{

	struct omap_hwmod *oh;

arch/arm/mach-omap2/pm.h

+8 −0
Original line number Diff line number Diff line
@@ -129,4 +129,12 @@ static inline int omap4_twl_init(void) 
}

#endif



#ifdef CONFIG_PM

extern void omap_pm_setup_oscillator(u32 tstart, u32 tshut);

extern void omap_pm_get_oscillator(u32 *tstart, u32 *tshut);

#else

static inline void omap_pm_setup_oscillator(u32 tstart, u32 tshut) { }

static inline void omap_pm_get_oscillator(u32 *tstart, u32 *tshut) { }

#endif



#endif