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PM changes via Kevin Hilman <khilman@deeprootsystems.com>:

Browse source 
Add support for full-chip retention in suspend for OMAP4 SoCs
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Merge tag 'omap-for-v3.8/pm-part2-v3-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/pm

From Tony Lindgren <tony@atomide.com>:
PM changes via Kevin Hilman <khilman@deeprootsystems.com>:

Add support for full-chip retention in suspend for OMAP4 SoCs

* tag 'omap-for-v3.8/pm-part2-v3-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: voltage: fixup oscillator handling when CONFIG_PM=n
  ARM: OMAP4: USB: power down MUSB PHY during boot
  ARM: OMAP4: suspend: Program all domains to retention

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2012-11-15 17:39:47 +01:00
parent 6b2aa05548 74d29168e9
commit ef7848683f
5 changed files with 37 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

32
arch/arm/mach-omap2/omap_phy_internal.c
View file

@ -33,6 +33,38 @@
#include "soc.h"
#include "control.h"
#define CONTROL_DEV_CONF 0x300
#define PHY_PD 0x1
/**
* omap4430_phy_power_down: disable MUSB PHY during early init
*
* OMAP4 MUSB PHY module is enabled by default on reset, but this will
* prevent core retention if not disabled by SW. USB driver will
* later on enable this, once and if the driver needs it.
*/
static int __init omap4430_phy_power_down(void)
{
void __iomem *ctrl_base;
if (!cpu_is_omap44xx())
return 0;
ctrl_base = ioremap(OMAP443X_SCM_BASE, SZ_1K);
if (!ctrl_base) {
pr_err("control module ioremap failed\n");
return -ENOMEM;
}
/* Power down the phy */
__raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF);
iounmap(ctrl_base);
return 0;
}
early_initcall(omap4430_phy_power_down);
void am35x_musb_reset(void)
{
u32 regval;

2
arch/arm/mach-omap2/pm.c
View file

@ -39,6 +39,7 @@ static struct omap_device_pm_latency *pm_lats;
*/
int (*omap_pm_suspend)(void);
#ifdef CONFIG_PM
/**
* struct omap2_oscillator - Describe the board main oscillator latencies
* @startup_time: oscillator startup latency
@ -68,6 +69,7 @@ void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
*tstart = oscillator.startup_time;
*tshut = oscillator.shutdown_time;
}
#endif
static int __init _init_omap_device(char *name)
{

2
arch/arm/mach-omap2/pm.h
View file

@ -135,7 +135,7 @@ extern void omap_pm_get_oscillator(u32 *tstart, u32 *tshut);
extern void omap_pm_setup_sr_i2c_pcb_length(u32 mm);
#else
static inline void omap_pm_setup_oscillator(u32 tstart, u32 tshut) { }
static inline void omap_pm_get_oscillator(u32 *tstart, u32 *tshut) { }
static inline void omap_pm_get_oscillator(u32 *tstart, u32 *tshut) { *tstart = *tshut = 0; }
static inline void omap_pm_setup_sr_i2c_pcb_length(u32 mm) { }
#endif

7
arch/arm/mach-omap2/pm44xx.c
View file

@ -100,13 +100,6 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
if (!strncmp(pwrdm->name, "cpu", 3))
return 0;
/*
* FIXME: Remove this check when core retention is supported
* Only MPUSS power domain is added in the list.
*/
if (strcmp(pwrdm->name, "mpu_pwrdm"))
return 0;
pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC);
if (!pwrst)
return -ENOMEM;

2
arch/arm/mach-omap2/vc.c
View file

@ -666,6 +666,7 @@ static u8 omap_vc_calc_vsel(struct voltagedomain *voltdm, u32 uvolt)
return voltdm->pmic->uv_to_vsel(uvolt);
}
#ifdef CONFIG_PM
/**
* omap_pm_setup_sr_i2c_pcb_length - set length of SR I2C traces on PCB
* @mm: length of the PCB trace in millimetres
@ -678,6 +679,7 @@ void __init omap_pm_setup_sr_i2c_pcb_length(u32 mm)
{
sr_i2c_pcb_length = mm;
}
#endif
void __init omap_vc_init_channel(struct voltagedomain *voltdm)
{