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Message-Id: <201111272153.53008.rjw@sisk.pl>
Date: Sun, 27 Nov 2011 21:53:52 +0100
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Linux PM list <linux-pm@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
"Linux-sh list" <linux-sh@...r.kernel.org>,
Magnus Damm <magnus.damm@...il.com>
Subject: [PATCH] PM / Domains: Make it possible to assign names to generic PM domains
From: Rafael J. Wysocki <rjw@...k.pl>
Add a name member pointer to struct generic_pm_domain and use it in
diagnostic messages regarding the domain power-off and power-on
latencies. Update the ARM shmobile SH7372 code to assign names to
the PM domains used by it.
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
Hi,
This patch is on top of linux-pm/linux-next.
Thanks,
Rafael
---
arch/arm/mach-shmobile/include/mach/sh7372.h | 1 +
arch/arm/mach-shmobile/pm-sh7372.c | 17 +++++++++++++----
drivers/base/power/domain.c | 14 ++++++++++++--
include/linux/pm_domain.h | 1 +
4 files changed, 27 insertions(+), 6 deletions(-)
Index: linux/drivers/base/power/domain.c
===================================================================
--- linux.orig/drivers/base/power/domain.c
+++ linux/drivers/base/power/domain.c
@@ -209,8 +209,13 @@ int __pm_genpd_poweron(struct generic_pm
goto err;
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
- if (elapsed_ns > genpd->power_on_latency_ns)
+ if (elapsed_ns > genpd->power_on_latency_ns) {
genpd->power_on_latency_ns = elapsed_ns;
+ if (genpd->name)
+ pr_warning("%s: Power-on latency exceeded, "
+ "new value %lld ns\n", genpd->name,
+ elapsed_ns);
+ }
}
genpd_set_active(genpd);
@@ -428,8 +433,13 @@ static int pm_genpd_poweroff(struct gene
}
elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
- if (elapsed_ns > genpd->power_off_latency_ns)
+ if (elapsed_ns > genpd->power_off_latency_ns) {
genpd->power_off_latency_ns = elapsed_ns;
+ if (genpd->name)
+ pr_warning("%s: Power-off latency exceeded, "
+ "new value %lld ns\n", genpd->name,
+ elapsed_ns);
+ }
}
genpd->status = GPD_STATE_POWER_OFF;
Index: linux/include/linux/pm_domain.h
===================================================================
--- linux.orig/include/linux/pm_domain.h
+++ linux/include/linux/pm_domain.h
@@ -49,6 +49,7 @@ struct generic_pm_domain {
struct mutex lock;
struct dev_power_governor *gov;
struct work_struct power_off_work;
+ char *name;
unsigned int in_progress; /* Number of devices being suspended now */
atomic_t sd_count; /* Number of subdomains with power "on" */
enum gpd_status status; /* Current state of the domain */
Index: linux/arch/arm/mach-shmobile/pm-sh7372.c
===================================================================
--- linux.orig/arch/arm/mach-shmobile/pm-sh7372.c
+++ linux/arch/arm/mach-shmobile/pm-sh7372.c
@@ -101,8 +101,8 @@ static int pd_power_down(struct generic_
}
if (!sh7372_pd->no_debug)
- pr_debug("sh7372 power domain down 0x%08x -> PSTR = 0x%08x\n",
- mask, __raw_readl(PSTR));
+ pr_debug("%s: Power off, 0x%08x -> PSTR = 0x%08x\n",
+ sh7372_pd->name, mask, __raw_readl(PSTR));
return 0;
}
@@ -133,8 +133,8 @@ static int __pd_power_up(struct sh7372_p
ret = -EIO;
if (!sh7372_pd->no_debug)
- pr_debug("sh7372 power domain up 0x%08x -> PSTR = 0x%08x\n",
- mask, __raw_readl(PSTR));
+ pr_debug("%s: Power on, 0x%08x -> PSTR = 0x%08x\n",
+ sh7372_pd->name, mask, __raw_readl(PSTR));
out:
if (ret == 0 && sh7372_pd->resume && do_resume)
@@ -207,6 +207,7 @@ void sh7372_init_pm_domain(struct sh7372
struct dev_power_governor *gov = sh7372_pd->gov;
pm_genpd_init(genpd, gov ? : &simple_qos_governor, false);
+ genpd->name = sh7372_pd->name;
genpd->dev_ops.stop = sh7372_stop_dev;
genpd->dev_ops.start = sh7372_start_dev;
genpd->dev_ops.active_wakeup = pd_active_wakeup;
@@ -233,18 +234,22 @@ void sh7372_pm_add_subdomain(struct sh73
}
struct sh7372_pm_domain sh7372_a4lc = {
+ .name = "A4LC",
.bit_shift = 1,
};
struct sh7372_pm_domain sh7372_a4mp = {
+ .name = "A4MP",
.bit_shift = 2,
};
struct sh7372_pm_domain sh7372_d4 = {
+ .name = "D4",
.bit_shift = 3,
};
struct sh7372_pm_domain sh7372_a4r = {
+ .name = "A4R",
.bit_shift = 5,
.gov = &sh7372_always_on_gov,
.suspend = sh7372_a4r_suspend,
@@ -253,14 +258,17 @@ struct sh7372_pm_domain sh7372_a4r = {
};
struct sh7372_pm_domain sh7372_a3rv = {
+ .name = "A3RV",
.bit_shift = 6,
};
struct sh7372_pm_domain sh7372_a3ri = {
+ .name = "A3RI",
.bit_shift = 8,
};
struct sh7372_pm_domain sh7372_a3sp = {
+ .name = "A3SP",
.bit_shift = 11,
.gov = &sh7372_always_on_gov,
.no_debug = true,
@@ -275,6 +283,7 @@ static void sh7372_a3sp_init(void)
}
struct sh7372_pm_domain sh7372_a3sg = {
+ .name = "A3SG",
.bit_shift = 13,
};
Index: linux/arch/arm/mach-shmobile/include/mach/sh7372.h
===================================================================
--- linux.orig/arch/arm/mach-shmobile/include/mach/sh7372.h
+++ linux/arch/arm/mach-shmobile/include/mach/sh7372.h
@@ -480,6 +480,7 @@ struct platform_device;
struct sh7372_pm_domain {
struct generic_pm_domain genpd;
struct dev_power_governor *gov;
+ char *name;
void (*suspend)(void);
void (*resume)(void);
unsigned int bit_shift;
--
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