From: Alexander Shishkin on
On Mon, Jul 26, 2010 at 12:04:23 +0300, Alexander Shishkin wrote:
> This adds a sysfs file at /sys/power/coresight_save which is used to
> control if the ETM and debug components' states should be saved and
> restored across OFF modes.

Oops, I wanted to resend the previous patch, but it's getting late here.
Sorry for the spam.

Regards,
--
Alex
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From: Shilimkar, Santosh on
> -----Original Message-----
> From: linux-omap-owner(a)vger.kernel.org [mailto:linux-omap-
> owner(a)vger.kernel.org] On Behalf Of Alexander Shishkin
> Sent: Monday, July 26, 2010 2:34 AM
> To: Hari Kanigeri
> Cc: Alexander Shishkin; linux-arm-kernel(a)lists.infradead.org; Tony
> Lindgren; Russell King; Paul Walmsley; Kevin Hilman; linux-
> omap(a)vger.kernel.org; linux-kernel(a)vger.kernel.org
> Subject: [PATCH] omap3: make coresight register save across OFF modes a
> sysfs option
>
> This adds a sysfs file at /sys/power/coresight_save which is used to
> control if the ETM and debug components' states should be saved and
> restored across OFF modes.
>
> Signed-off-by: Alexander Shishkin <virtuoso(a)slind.org>
> Cc: Tony Lindgren <tony(a)atomide.com>
> Cc: Russell King <linux(a)arm.linux.org.uk>
> Cc: Paul Walmsley <paul(a)pwsan.com>
> Cc: Kevin Hilman <khilman(a)deeprootsystems.com>
> Cc: linux-omap(a)vger.kernel.org
> Cc: linux-arm-kernel(a)lists.infradead.org
> Cc: linux-kernel(a)vger.kernel.org
> ---
> arch/arm/mach-omap2/Makefile | 1 +
> arch/arm/mach-omap2/debug34xx.c | 66
> +++++++++++++++++++++++++++++++++++++++
> arch/arm/mach-omap2/pm.h | 6 +++
> arch/arm/mach-omap2/pm34xx.c | 3 ++
> 4 files changed, 76 insertions(+), 0 deletions(-)
> create mode 100644 arch/arm/mach-omap2/debug34xx.c
>
> diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
> index f5b4ff4..3a64ce4 100644
> --- a/arch/arm/mach-omap2/Makefile
> +++ b/arch/arm/mach-omap2/Makefile
> @@ -49,6 +49,7 @@ ifeq ($(CONFIG_PM),y)
> obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
> obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o
> obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o cpuidle34xx.o
> +obj-$(CONFIG_ENABLE_OFF_MODE_JTAG_ETM_DEBUG) += debug34xx.o
> obj-$(CONFIG_PM_DEBUG) += pm-debug.o
>
> AFLAGS_sleep24xx.o :=-Wa,-march=armv6
> diff --git a/arch/arm/mach-omap2/debug34xx.c b/arch/arm/mach-
> omap2/debug34xx.c
> new file mode 100644
> index 0000000..698e83a
> --- /dev/null
> +++ b/arch/arm/mach-omap2/debug34xx.c

> @@ -0,0 +1,66 @@
> +/*
> + * Control saving and restoring of coresight components' state during
> + * OFF mode.
> + *
> + * Copyright (C) 2010 Nokia Corporation
> + * Alexander Shishkin
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/sysfs.h>
> +#include <linux/kobject.h>
> +
> +#include "pm.h"
> +
> +/*
> + * Pointer to a place in sram where the ETM/debug state save
> + * flag is. It can be calculated after the omap_sram_idle is
> + * pushed to sram.
> + */
> +static unsigned int *_etm_save;
> +
> +/*
> + * sysfs file /sys/power/coresight_save controls whether the
> + * state of coresight components should be saved and restored
> + * across OFF modes.
> + */
> +static ssize_t coresight_save_show(struct kobject *kobj,
> + struct kobj_attribute *attr,
> + char *buf)
> +{
> + return sprintf(buf, "%u\n", *_etm_save);
> +}
> +
> +static ssize_t coresight_save_store(struct kobject *kobj,
> + struct kobj_attribute *attr,
> + const char *buf, size_t n)
> +{
> + unsigned int value;
> +
> + if (sscanf(buf, "%u", &value) != 1)
> + return -EINVAL;
> +
> + *_etm_save = !!value;
> +
> + return n;
> +}
> +
> +static struct kobj_attribute coresight_save_attr =
> + __ATTR(coresight_save, 0644, coresight_save_show,
> coresight_save_store);
> +
> +int omap3_coresight_pm_init(void *sram_addr)
> +{
> + int ret;
> +
> + /* the last word from the top of omap_sram_idle */
> + _etm_save = (unsigned *)((u8 *)sram_addr + omap34xx_cpu_suspend_sz -
> 4);
> +
> + ret = sysfs_create_file(power_kobj, &coresight_save_attr.attr);
> +
> + return ret;
> +}

Looking at content of this file, I think you can keep this under common
pm-debug.c file.
Any problems with that ?
> +
> diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
> index 3de6ece..0321834 100644
> --- a/arch/arm/mach-omap2/pm.h
> +++ b/arch/arm/mach-omap2/pm.h
> @@ -76,6 +76,12 @@ extern void omap34xx_cpu_suspend(u32 *addr, int
> save_state);
> extern void save_secure_ram_context(u32 *addr);
> extern void omap3_save_scratchpad_contents(void);
>
> +#ifdef CONFIG_ENABLE_OFF_MODE_JTAG_ETM_DEBUG
> +int omap3_coresight_pm_init(void *sram_addr);
> +#else
> +#define omap3_coresight_pm_init(x) do {} while (0)
> +#endif
> +
> extern unsigned int omap24xx_idle_loop_suspend_sz;
> extern unsigned int omap34xx_suspend_sz;
> extern unsigned int save_secure_ram_context_sz;
> diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
> index fb4994a..c389e65 100644
> --- a/arch/arm/mach-omap2/pm34xx.c
> +++ b/arch/arm/mach-omap2/pm34xx.c
> @@ -1096,6 +1096,9 @@ static int __init omap3_pm_init(void)
> core_clkdm = clkdm_lookup("core_clkdm");
>
> omap_push_sram_idle();
> +
> + omap3_coresight_pm_init(_omap_sram_idle);
> +
> #ifdef CONFIG_SUSPEND
> suspend_set_ops(&omap_pm_ops);
> #endif /* CONFIG_SUSPEND */
> --
> 1.7.1
>
> --
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From: Alexander Shishkin on
On Mon, Jul 26, 2010 at 12:28:38 +0530, Shilimkar, Santosh wrote:
> > -----Original Message-----
> > From: linux-omap-owner(a)vger.kernel.org [mailto:linux-omap-
> > owner(a)vger.kernel.org] On Behalf Of Alexander Shishkin
> > Sent: Monday, July 26, 2010 2:34 AM
> > To: Hari Kanigeri
> > Cc: Alexander Shishkin; linux-arm-kernel(a)lists.infradead.org; Tony
> > Lindgren; Russell King; Paul Walmsley; Kevin Hilman; linux-
> > omap(a)vger.kernel.org; linux-kernel(a)vger.kernel.org
> > Subject: [PATCH] omap3: make coresight register save across OFF modes a
> > sysfs option
> >
> > This adds a sysfs file at /sys/power/coresight_save which is used to
> > control if the ETM and debug components' states should be saved and
> > restored across OFF modes.
> >
> > Signed-off-by: Alexander Shishkin <virtuoso(a)slind.org>
> > Cc: Tony Lindgren <tony(a)atomide.com>
> > Cc: Russell King <linux(a)arm.linux.org.uk>
> > Cc: Paul Walmsley <paul(a)pwsan.com>
> > Cc: Kevin Hilman <khilman(a)deeprootsystems.com>
> > Cc: linux-omap(a)vger.kernel.org
> > Cc: linux-arm-kernel(a)lists.infradead.org
> > Cc: linux-kernel(a)vger.kernel.org
> > ---
> > arch/arm/mach-omap2/Makefile | 1 +
> > arch/arm/mach-omap2/debug34xx.c | 66
> > +++++++++++++++++++++++++++++++++++++++
> > arch/arm/mach-omap2/pm.h | 6 +++
> > arch/arm/mach-omap2/pm34xx.c | 3 ++
> > 4 files changed, 76 insertions(+), 0 deletions(-)
> > create mode 100644 arch/arm/mach-omap2/debug34xx.c
> >
> > diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
> > index f5b4ff4..3a64ce4 100644
> > --- a/arch/arm/mach-omap2/Makefile
> > +++ b/arch/arm/mach-omap2/Makefile
> > @@ -49,6 +49,7 @@ ifeq ($(CONFIG_PM),y)
> > obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
> > obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o
> > obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o cpuidle34xx.o
> > +obj-$(CONFIG_ENABLE_OFF_MODE_JTAG_ETM_DEBUG) += debug34xx.o
> > obj-$(CONFIG_PM_DEBUG) += pm-debug.o
> >
> > AFLAGS_sleep24xx.o :=-Wa,-march=armv6
> > diff --git a/arch/arm/mach-omap2/debug34xx.c b/arch/arm/mach-
> > omap2/debug34xx.c
> > new file mode 100644
> > index 0000000..698e83a
> > --- /dev/null
> > +++ b/arch/arm/mach-omap2/debug34xx.c
>
> > @@ -0,0 +1,66 @@
> > +/*
> > + * Control saving and restoring of coresight components' state during
> > + * OFF mode.
> > + *
> > + * Copyright (C) 2010 Nokia Corporation
> > + * Alexander Shishkin
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License version 2 as
> > + * published by the Free Software Foundation.
> > + */
> > +
> > +#include <linux/kernel.h>
> > +#include <linux/sysfs.h>
> > +#include <linux/kobject.h>
> > +
> > +#include "pm.h"
> > +
> > +/*
> > + * Pointer to a place in sram where the ETM/debug state save
> > + * flag is. It can be calculated after the omap_sram_idle is
> > + * pushed to sram.
> > + */
> > +static unsigned int *_etm_save;
> > +
> > +/*
> > + * sysfs file /sys/power/coresight_save controls whether the
> > + * state of coresight components should be saved and restored
> > + * across OFF modes.
> > + */
> > +static ssize_t coresight_save_show(struct kobject *kobj,
> > + struct kobj_attribute *attr,
> > + char *buf)
> > +{
> > + return sprintf(buf, "%u\n", *_etm_save);
> > +}
> > +
> > +static ssize_t coresight_save_store(struct kobject *kobj,
> > + struct kobj_attribute *attr,
> > + const char *buf, size_t n)
> > +{
> > + unsigned int value;
> > +
> > + if (sscanf(buf, "%u", &value) != 1)
> > + return -EINVAL;
> > +
> > + *_etm_save = !!value;
> > +
> > + return n;
> > +}
> > +
> > +static struct kobj_attribute coresight_save_attr =
> > + __ATTR(coresight_save, 0644, coresight_save_show,
> > coresight_save_store);
> > +
> > +int omap3_coresight_pm_init(void *sram_addr)
> > +{
> > + int ret;
> > +
> > + /* the last word from the top of omap_sram_idle */
> > + _etm_save = (unsigned *)((u8 *)sram_addr + omap34xx_cpu_suspend_sz -
> > 4);
> > +
> > + ret = sysfs_create_file(power_kobj, &coresight_save_attr.attr);
> > +
> > + return ret;
> > +}
>
> Looking at content of this file, I think you can keep this under common
> pm-debug.c file.
> Any problems with that ?

I was trying to avoid #ifdeffing too much and I didn't want this code to
compile at all when CONFIG_ENABLE_OFF_MODE_JTAG_ETM_DEBUG is not set.
Otherwise, no problems.

Regards,
--
Alex
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From: Shilimkar, Santosh on


> -----Original Message-----
> From: Alexander Shishkin [mailto:virtuoso(a)slind.org]
> Sent: Monday, July 26, 2010 1:02 PM
> To: Shilimkar, Santosh
> Cc: Hari Kanigeri; linux-arm-kernel(a)lists.infradead.org; Tony Lindgren;
> Russell King; Paul Walmsley; Kevin Hilman; linux-omap(a)vger.kernel.org;
> linux-kernel(a)vger.kernel.org
> Subject: Re: [PATCH] omap3: make coresight register save across OFF modes
> a sysfs option
>
> On Mon, Jul 26, 2010 at 12:28:38 +0530, Shilimkar, Santosh wrote:
> > > -----Original Message-----
> > > From: linux-omap-owner(a)vger.kernel.org [mailto:linux-omap-
> > > owner(a)vger.kernel.org] On Behalf Of Alexander Shishkin
> > > Sent: Monday, July 26, 2010 2:34 AM
> > > To: Hari Kanigeri
> > > Cc: Alexander Shishkin; linux-arm-kernel(a)lists.infradead.org; Tony
> > > Lindgren; Russell King; Paul Walmsley; Kevin Hilman; linux-
> > > omap(a)vger.kernel.org; linux-kernel(a)vger.kernel.org
> > > Subject: [PATCH] omap3: make coresight register save across OFF modes
> a
> > > sysfs option
> > >
> > > This adds a sysfs file at /sys/power/coresight_save which is used to
> > > control if the ETM and debug components' states should be saved and
> > > restored across OFF modes.
> > >
> > > Signed-off-by: Alexander Shishkin <virtuoso(a)slind.org>
> > > Cc: Tony Lindgren <tony(a)atomide.com>
> > > Cc: Russell King <linux(a)arm.linux.org.uk>
> > > Cc: Paul Walmsley <paul(a)pwsan.com>
> > > Cc: Kevin Hilman <khilman(a)deeprootsystems.com>
> > > Cc: linux-omap(a)vger.kernel.org
> > > Cc: linux-arm-kernel(a)lists.infradead.org
> > > Cc: linux-kernel(a)vger.kernel.org
> > > ---
> > > arch/arm/mach-omap2/Makefile | 1 +
> > > arch/arm/mach-omap2/debug34xx.c | 66
> > > +++++++++++++++++++++++++++++++++++++++
> > > arch/arm/mach-omap2/pm.h | 6 +++
> > > arch/arm/mach-omap2/pm34xx.c | 3 ++
> > > 4 files changed, 76 insertions(+), 0 deletions(-)
> > > create mode 100644 arch/arm/mach-omap2/debug34xx.c
> > >
> > > diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-
> omap2/Makefile
> > > index f5b4ff4..3a64ce4 100644
> > > --- a/arch/arm/mach-omap2/Makefile
> > > +++ b/arch/arm/mach-omap2/Makefile
> > > @@ -49,6 +49,7 @@ ifeq ($(CONFIG_PM),y)
> > > obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
> > > obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o
> > > obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o cpuidle34xx.o
> > > +obj-$(CONFIG_ENABLE_OFF_MODE_JTAG_ETM_DEBUG) += debug34xx.o
> > > obj-$(CONFIG_PM_DEBUG) += pm-debug.o
> > >
> > > AFLAGS_sleep24xx.o :=-Wa,-march=armv6
> > > diff --git a/arch/arm/mach-omap2/debug34xx.c b/arch/arm/mach-
> > > omap2/debug34xx.c
> > > new file mode 100644
> > > index 0000000..698e83a
> > > --- /dev/null
> > > +++ b/arch/arm/mach-omap2/debug34xx.c
> >
> > > @@ -0,0 +1,66 @@
> > > +/*
> > > + * Control saving and restoring of coresight components' state during
> > > + * OFF mode.
> > > + *
> > > + * Copyright (C) 2010 Nokia Corporation
> > > + * Alexander Shishkin
> > > + *
> > > + * This program is free software; you can redistribute it and/or
> modify
> > > + * it under the terms of the GNU General Public License version 2 as
> > > + * published by the Free Software Foundation.
> > > + */
> > > +
> > > +#include <linux/kernel.h>
> > > +#include <linux/sysfs.h>
> > > +#include <linux/kobject.h>
> > > +
> > > +#include "pm.h"
> > > +
> > > +/*
> > > + * Pointer to a place in sram where the ETM/debug state save
> > > + * flag is. It can be calculated after the omap_sram_idle is
> > > + * pushed to sram.
> > > + */
> > > +static unsigned int *_etm_save;
> > > +
> > > +/*
> > > + * sysfs file /sys/power/coresight_save controls whether the
> > > + * state of coresight components should be saved and restored
> > > + * across OFF modes.
> > > + */
> > > +static ssize_t coresight_save_show(struct kobject *kobj,
> > > + struct kobj_attribute *attr,
> > > + char *buf)
> > > +{
> > > + return sprintf(buf, "%u\n", *_etm_save);
> > > +}
> > > +
> > > +static ssize_t coresight_save_store(struct kobject *kobj,
> > > + struct kobj_attribute *attr,
> > > + const char *buf, size_t n)
> > > +{
> > > + unsigned int value;
> > > +
> > > + if (sscanf(buf, "%u", &value) != 1)
> > > + return -EINVAL;
> > > +
> > > + *_etm_save = !!value;
> > > +
> > > + return n;
> > > +}
> > > +
> > > +static struct kobj_attribute coresight_save_attr =
> > > + __ATTR(coresight_save, 0644, coresight_save_show,
> > > coresight_save_store);
> > > +
> > > +int omap3_coresight_pm_init(void *sram_addr)
> > > +{
> > > + int ret;
> > > +
> > > + /* the last word from the top of omap_sram_idle */
> > > + _etm_save = (unsigned *)((u8 *)sram_addr + omap34xx_cpu_suspend_sz -
> > > 4);
> > > +
> > > + ret = sysfs_create_file(power_kobj, &coresight_save_attr.attr);
> > > +
> > > + return ret;
> > > +}
> >
> > Looking at content of this file, I think you can keep this under common
> > pm-debug.c file.
> > Any problems with that ?
>
> I was trying to avoid #ifdeffing too much and I didn't want this code to
> compile at all when CONFIG_ENABLE_OFF_MODE_JTAG_ETM_DEBUG is not set.
> Otherwise, no problems.
>
Ok.
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From: Alexander Shishkin on
On Mon, Jul 26, 2010 at 02:01:14 +0530, Shilimkar, Santosh wrote:
>
>
> > -----Original Message-----
> > From: Alexander Shishkin [mailto:virtuoso(a)slind.org]
> > Sent: Monday, July 26, 2010 1:02 PM
> > To: Shilimkar, Santosh
> > Cc: Hari Kanigeri; linux-arm-kernel(a)lists.infradead.org; Tony Lindgren;
> > Russell King; Paul Walmsley; Kevin Hilman; linux-omap(a)vger.kernel.org;
> > linux-kernel(a)vger.kernel.org
> > Subject: Re: [PATCH] omap3: make coresight register save across OFF modes
> > a sysfs option
> >
> > On Mon, Jul 26, 2010 at 12:28:38 +0530, Shilimkar, Santosh wrote:
> > > > -----Original Message-----
> > > > From: linux-omap-owner(a)vger.kernel.org [mailto:linux-omap-
> > > > owner(a)vger.kernel.org] On Behalf Of Alexander Shishkin
> > > > Sent: Monday, July 26, 2010 2:34 AM
> > > > To: Hari Kanigeri
> > > > Cc: Alexander Shishkin; linux-arm-kernel(a)lists.infradead.org; Tony
> > > > Lindgren; Russell King; Paul Walmsley; Kevin Hilman; linux-
> > > > omap(a)vger.kernel.org; linux-kernel(a)vger.kernel.org
> > > > Subject: [PATCH] omap3: make coresight register save across OFF modes
> > a
> > > > sysfs option
> > > >
> > > > This adds a sysfs file at /sys/power/coresight_save which is used to
> > > > control if the ETM and debug components' states should be saved and
> > > > restored across OFF modes.
> > > >
> > > > Signed-off-by: Alexander Shishkin <virtuoso(a)slind.org>
> > > > Cc: Tony Lindgren <tony(a)atomide.com>
> > > > Cc: Russell King <linux(a)arm.linux.org.uk>
> > > > Cc: Paul Walmsley <paul(a)pwsan.com>
> > > > Cc: Kevin Hilman <khilman(a)deeprootsystems.com>
> > > > Cc: linux-omap(a)vger.kernel.org
> > > > Cc: linux-arm-kernel(a)lists.infradead.org
> > > > Cc: linux-kernel(a)vger.kernel.org
> > > > ---
> > > > arch/arm/mach-omap2/Makefile | 1 +
> > > > arch/arm/mach-omap2/debug34xx.c | 66
> > > > +++++++++++++++++++++++++++++++++++++++
> > > > arch/arm/mach-omap2/pm.h | 6 +++
> > > > arch/arm/mach-omap2/pm34xx.c | 3 ++
> > > > 4 files changed, 76 insertions(+), 0 deletions(-)
> > > > create mode 100644 arch/arm/mach-omap2/debug34xx.c
> > > >
> > > > diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-
> > omap2/Makefile
> > > > index f5b4ff4..3a64ce4 100644
> > > > --- a/arch/arm/mach-omap2/Makefile
> > > > +++ b/arch/arm/mach-omap2/Makefile
> > > > @@ -49,6 +49,7 @@ ifeq ($(CONFIG_PM),y)
> > > > obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
> > > > obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o
> > > > obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o cpuidle34xx.o
> > > > +obj-$(CONFIG_ENABLE_OFF_MODE_JTAG_ETM_DEBUG) += debug34xx.o
> > > > obj-$(CONFIG_PM_DEBUG) += pm-debug.o
> > > >
> > > > AFLAGS_sleep24xx.o :=-Wa,-march=armv6
> > > > diff --git a/arch/arm/mach-omap2/debug34xx.c b/arch/arm/mach-
> > > > omap2/debug34xx.c
> > > > new file mode 100644
> > > > index 0000000..698e83a
> > > > --- /dev/null
> > > > +++ b/arch/arm/mach-omap2/debug34xx.c
> > >
> > > > @@ -0,0 +1,66 @@
> > > > +/*
> > > > + * Control saving and restoring of coresight components' state during
> > > > + * OFF mode.
> > > > + *
> > > > + * Copyright (C) 2010 Nokia Corporation
> > > > + * Alexander Shishkin
> > > > + *
> > > > + * This program is free software; you can redistribute it and/or
> > modify
> > > > + * it under the terms of the GNU General Public License version 2 as
> > > > + * published by the Free Software Foundation.
> > > > + */
> > > > +
> > > > +#include <linux/kernel.h>
> > > > +#include <linux/sysfs.h>
> > > > +#include <linux/kobject.h>
> > > > +
> > > > +#include "pm.h"
> > > > +
> > > > +/*
> > > > + * Pointer to a place in sram where the ETM/debug state save
> > > > + * flag is. It can be calculated after the omap_sram_idle is
> > > > + * pushed to sram.
> > > > + */
> > > > +static unsigned int *_etm_save;
> > > > +
> > > > +/*
> > > > + * sysfs file /sys/power/coresight_save controls whether the
> > > > + * state of coresight components should be saved and restored
> > > > + * across OFF modes.
> > > > + */
> > > > +static ssize_t coresight_save_show(struct kobject *kobj,
> > > > + struct kobj_attribute *attr,
> > > > + char *buf)
> > > > +{
> > > > + return sprintf(buf, "%u\n", *_etm_save);
> > > > +}
> > > > +
> > > > +static ssize_t coresight_save_store(struct kobject *kobj,
> > > > + struct kobj_attribute *attr,
> > > > + const char *buf, size_t n)
> > > > +{
> > > > + unsigned int value;
> > > > +
> > > > + if (sscanf(buf, "%u", &value) != 1)
> > > > + return -EINVAL;
> > > > +
> > > > + *_etm_save = !!value;
> > > > +
> > > > + return n;
> > > > +}
> > > > +
> > > > +static struct kobj_attribute coresight_save_attr =
> > > > + __ATTR(coresight_save, 0644, coresight_save_show,
> > > > coresight_save_store);
> > > > +
> > > > +int omap3_coresight_pm_init(void *sram_addr)
> > > > +{
> > > > + int ret;
> > > > +
> > > > + /* the last word from the top of omap_sram_idle */
> > > > + _etm_save = (unsigned *)((u8 *)sram_addr + omap34xx_cpu_suspend_sz -
> > > > 4);
> > > > +
> > > > + ret = sysfs_create_file(power_kobj, &coresight_save_attr.attr);
> > > > +
> > > > + return ret;
> > > > +}
> > >
> > > Looking at content of this file, I think you can keep this under common
> > > pm-debug.c file.
> > > Any problems with that ?
> >
> > I was trying to avoid #ifdeffing too much and I didn't want this code to
> > compile at all when CONFIG_ENABLE_OFF_MODE_JTAG_ETM_DEBUG is not set.
> > Otherwise, no problems.
> >
> Ok.

But feel free to ack, all the same. :)

Regards,
--
Alex
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