[PATCH 00/04] PM OMAP3: Misc patches

[PATCH 00/04] PM OMAP3: Misc patches

[Tero Kristo]

Some misc PM related patches here. #1 and #3 are more important than others,
#4 introduces the PRCM register dump capability to PM debug, #2 is a sort
of cosmetic change.

--Tero

[PATCH 01/04] Fix cpuidle off-modes to be controlled via sysfs

[Tero Kristo]

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
---
 arch/arm/mach-omap2/cpuidle34xx.c |   21 ++++++++++++++++++---
 arch/arm/mach-omap2/pm.c          |    4 ++--
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 235976e..f97c4d8 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -29,6 +29,8 @@
 #include <mach/control.h>
 #include <mach/common.h>
 
+#include "pm.h"
+
 #ifdef CONFIG_CPU_IDLE
 
 #define OMAP3_MAX_STATES 7
@@ -77,6 +79,8 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
 {
 	struct omap3_processor_cx *cx = cpuidle_get_statedata(state);
 	struct timespec ts_preidle, ts_postidle, ts_idle;
+	int mpu_next_state;
+	int core_next_state;
 
 	current_cx_state = *cx;
 
@@ -89,8 +93,19 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
 	local_irq_disable();
 	local_fiq_disable();
 
-	set_pwrdm_state(mpu_pd, cx->mpu_state);
-	set_pwrdm_state(core_pd, cx->core_state);
+	/* Dirty hack to enable / disable off-mode dynamically */
+	mpu_next_state = cx->mpu_state;
+	core_next_state = cx->core_state;
+
+	if (!enable_off_mode) {
+		if (mpu_next_state == PWRDM_POWER_OFF)
+			mpu_next_state = PWRDM_POWER_RET;
+		if (core_next_state == PWRDM_POWER_OFF)
+			core_next_state = PWRDM_POWER_RET;
+	}
+
+	set_pwrdm_state(mpu_pd, mpu_next_state);
+	set_pwrdm_state(core_pd, core_next_state);
 
 	if (omap_irq_pending())
 		goto return_sleep_time;
@@ -195,7 +210,7 @@ void omap_init_power_states(void)
 				CPUIDLE_FLAG_CHECK_BM;
 
 	/* C6 . MPU OFF + Core OFF */
-	omap3_power_states[OMAP3_STATE_C6].valid = 0;
+	omap3_power_states[OMAP3_STATE_C6].valid = 1;
 	omap3_power_states[OMAP3_STATE_C6].type = OMAP3_STATE_C6;
 	omap3_power_states[OMAP3_STATE_C6].sleep_latency = 10000;
 	omap3_power_states[OMAP3_STATE_C6].wakeup_latency = 30000;
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index 136683b..9dbe7e2 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -87,9 +87,9 @@ static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr,
 	} else if (attr == &clocks_off_while_idle_attr) {
 		clocks_off_while_idle = value;
 	} else if (attr == &enable_off_mode_attr) {
-		int enable = (value > 0) ? 1 : 0;
+		enable_off_mode = (value > 0) ? 1 : 0;
 
-		omap3_pm_off_mode_enable(enable);
+		omap3_pm_off_mode_enable(enable_off_mode);
 	} else if (attr == &voltage_off_while_idle_attr) {
 		voltage_off_while_idle = value;
 		if (voltage_off_while_idle)
-- 
1.5.4.3

[PATCH 02/04] PM debug: do not print out status for meta powerdomains (dpll*)

[Tero Kristo]

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
---
 arch/arm/mach-omap2/pm-debug.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index c903c55..d21af83 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -197,7 +197,8 @@ static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
 	struct seq_file *s = (struct seq_file *)user;
 
 	if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
-		strcmp(clkdm->name, "wkup_clkdm") == 0)
+		strcmp(clkdm->name, "wkup_clkdm") == 0 ||
+		strncmp(clkdm->name, "dpll", 4) == 0)
 		return 0;
 
 	seq_printf(s, "%s->%s (%d)", clkdm->name,
@@ -214,7 +215,8 @@ static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
 	int i;
 
 	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
-		strcmp(pwrdm->name, "wkup_pwrdm") == 0)
+		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
+		strncmp(pwrdm->name, "dpll", 4) == 0)
 		return 0;
 
 	if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
-- 
1.5.4.3

[PATCH 03/04] PM counters: fix initialization race condition

[Tero Kristo]

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
---
 arch/arm/mach-omap2/clockdomain.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index b0b5885..b27afc0 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -481,6 +481,8 @@ void omap2_clkdm_allow_idle(struct clockdomain *clkdm)
 			    v << __ffs(clkdm->clktrctrl_mask),
 			    clkdm->pwrdm.ptr->prcm_offs,
 			    CM_CLKSTCTRL);
+
+	pwrdm_clkdm_state_switch(clkdm);
 }
 
 /**
-- 
1.5.4.3

[PATCH 04/04] PM debug: Add PRCM register dump support

[Tero Kristo]

Allows dumping out current register contents from the debug filesystem, and
also allows user to add arbitrary register save points into code. Current
register contents are available under debugfs at:

[debugfs]/pm_debug/registers/current

To add a save point, do following:

>From module init (or somewhere before the save call, called only once):
  pm_dbg_init_regset(n); // n=1..4, allocates memory for dump area #n

>From arbitrary code location:
  pm_dbg_regset_save(n); // n=1..4, saves registers to dump area #n

After this, the register dump can be seen under [debugfs]/pm_debug/registers/n

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
---
 arch/arm/mach-omap2/pm-debug.c |  208 ++++++++++++++++++++++++++++++++++++++++
 arch/arm/mach-omap2/pm.h       |    4 +
 2 files changed, 212 insertions(+), 0 deletions(-)
 mode change 100644 => 100755 arch/arm/mach-omap2/pm-debug.c
 mode change 100644 => 100755 arch/arm/mach-omap2/pm.h

diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
old mode 100644
new mode 100755
index d21af83..05f3914
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -159,6 +159,8 @@ void omap2_pm_dump(int mode, int resume, unsigned int us)
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 
+static void pm_dbg_regset_store(u32 *ptr);
+
 struct dentry *pm_dbg_dir;
 
 static int pm_dbg_init_done;
@@ -168,6 +170,159 @@ enum {
 	DEBUG_FILE_TIMERS,
 };
 
+struct pm_module_def {
+	char name[8]; /* Name of the module */
+	short type; /* CM or PRM */
+	unsigned short offset;
+	int low; /* First register address on this module */
+	int high; /* Last register address on this module */
+};
+
+#define MOD_CM 0
+#define MOD_PRM 1
+
+static const struct pm_module_def pm_dbg_reg_modules[] = {
+	{ "IVA2", MOD_CM, OMAP3430_IVA2_MOD, 0, 0x4c },
+	{ "OCP", MOD_CM, OCP_MOD, 0, 0x10 },
+	{ "MPU", MOD_CM, MPU_MOD, 4, 0x4c },
+	{ "CORE", MOD_CM, CORE_MOD, 0, 0x4c },
+	{ "SGX", MOD_CM, OMAP3430ES2_SGX_MOD, 0, 0x4c },
+	{ "WKUP", MOD_CM, WKUP_MOD, 0, 0x40 },
+	{ "CCR", MOD_CM, PLL_MOD, 0, 0x70 },
+	{ "DSS", MOD_CM, OMAP3430_DSS_MOD, 0, 0x4c },
+	{ "CAM", MOD_CM, OMAP3430_CAM_MOD, 0, 0x4c },
+	{ "PER", MOD_CM, OMAP3430_PER_MOD, 0, 0x4c },
+	{ "EMU", MOD_CM, OMAP3430_EMU_MOD, 0x40, 0x54 },
+	{ "NEON", MOD_CM, OMAP3430_NEON_MOD, 0x20, 0x48 },
+	{ "USB", MOD_CM, OMAP3430ES2_USBHOST_MOD, 0, 0x4c },
+
+	{ "IVA2", MOD_PRM, OMAP3430_IVA2_MOD, 0x50, 0xfc },
+	{ "OCP", MOD_PRM, OCP_MOD, 4, 0x1c },
+	{ "MPU", MOD_PRM, MPU_MOD, 0x58, 0xe8 },
+	{ "CORE", MOD_PRM, CORE_MOD, 0x58, 0xf8 },
+	{ "SGX", MOD_PRM, OMAP3430ES2_SGX_MOD, 0x58, 0xe8 },
+	{ "WKUP", MOD_PRM, WKUP_MOD, 0xa0, 0xb0 },
+	{ "CCR", MOD_PRM, PLL_MOD, 0x40, 0x70 },
+	{ "DSS", MOD_PRM, OMAP3430_DSS_MOD, 0x58, 0xe8 },
+	{ "CAM", MOD_PRM, OMAP3430_CAM_MOD, 0x58, 0xe8 },
+	{ "PER", MOD_PRM, OMAP3430_PER_MOD, 0x58, 0xe8 },
+	{ "EMU", MOD_PRM, OMAP3430_EMU_MOD, 0x58, 0xe4 },
+	{ "GLBL", MOD_PRM, OMAP3430_GR_MOD, 0x20, 0xe4 },
+	{ "NEON", MOD_PRM, OMAP3430_NEON_MOD, 0x58, 0xe8 },
+	{ "USB", MOD_PRM, OMAP3430ES2_USBHOST_MOD, 0x58, 0xe8 },
+	{ "", 0, 0, 0, 0 },
+};
+
+#define PM_DBG_MAX_REG_SETS 4
+
+static void *pm_dbg_reg_set[PM_DBG_MAX_REG_SETS];
+
+static int pm_dbg_get_regset_size(void)
+{
+	static int regset_size;
+
+	if (regset_size == 0) {
+		int i = 0;
+
+		while (pm_dbg_reg_modules[i].name[0] != 0) {
+			regset_size += pm_dbg_reg_modules[i].high +
+				4 - pm_dbg_reg_modules[i].low;
+			i++;
+		}
+	}
+	return regset_size;
+}
+
+static int pm_dbg_show_regs(struct seq_file *s, void *unused)
+{
+	int i, j;
+	unsigned long val;
+	int reg_set = (int)s->private;
+	u32 *ptr;
+	void *store = NULL;
+	int regs;
+	int linefeed;
+
+	if (reg_set == 0) {
+		store = kmalloc(pm_dbg_get_regset_size(), GFP_KERNEL);
+		ptr = store;
+		pm_dbg_regset_store(ptr);
+	} else {
+		ptr = pm_dbg_reg_set[reg_set - 1];
+	}
+
+	i = 0;
+
+	while (pm_dbg_reg_modules[i].name[0] != 0) {
+		regs = 0;
+		linefeed = 0;
+		if (pm_dbg_reg_modules[i].type == MOD_CM)
+			seq_printf(s, "MOD: CM_%s (%08x)\n",
+				pm_dbg_reg_modules[i].name,
+				(u32)(OMAP2_CM_BASE +
+				pm_dbg_reg_modules[i].offset));
+		else
+			seq_printf(s, "MOD: PRM_%s (%08x)\n",
+				pm_dbg_reg_modules[i].name,
+				(u32)(OMAP2_PRM_BASE +
+				pm_dbg_reg_modules[i].offset));
+
+		for (j = pm_dbg_reg_modules[i].low;
+			j <= pm_dbg_reg_modules[i].high; j += 4) {
+			val = *(ptr++);
+			if (val != 0) {
+				regs++;
+				if (linefeed) {
+					seq_printf(s, "\n");
+					linefeed = 0;
+				}
+				seq_printf(s, "  %02x => %08lx", j, val);
+				if (regs % 4 == 0)
+					linefeed = 1;
+			}
+		}
+		seq_printf(s, "\n");
+		i++;
+	}
+
+	if (store != NULL)
+		kfree(store);
+
+	return 0;
+}
+
+static void pm_dbg_regset_store(u32 *ptr)
+{
+	int i, j;
+	u32 val;
+
+	i = 0;
+
+	while (pm_dbg_reg_modules[i].name[0] != 0) {
+		for (j = pm_dbg_reg_modules[i].low;
+			j <= pm_dbg_reg_modules[i].high; j += 4) {
+			if (pm_dbg_reg_modules[i].type == MOD_CM)
+				val = cm_read_mod_reg(
+					pm_dbg_reg_modules[i].offset, j);
+			else
+				val = prm_read_mod_reg(
+					pm_dbg_reg_modules[i].offset, j);
+			*(ptr++) = val;
+		}
+		i++;
+	}
+}
+
+int pm_dbg_regset_save(int reg_set)
+{
+	if (pm_dbg_reg_set[reg_set-1] == NULL)
+		return -EINVAL;
+
+	pm_dbg_regset_store(pm_dbg_reg_set[reg_set-1]);
+
+	return 0;
+}
+
 static const char pwrdm_state_names[][4] = {
 	"OFF",
 	"RET",
@@ -281,6 +436,11 @@ static int pm_dbg_open(struct inode *inode, struct file *file)
 	};
 }
 
+static int pm_dbg_reg_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, pm_dbg_show_regs, inode->i_private);
+}
+
 static const struct file_operations debug_fops = {
 	.open           = pm_dbg_open,
 	.read           = seq_read,
@@ -288,6 +448,37 @@ static const struct file_operations debug_fops = {
 	.release        = single_release,
 };
 
+static const struct file_operations debug_reg_fops = {
+	.open           = pm_dbg_reg_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release        = single_release,
+};
+
+int pm_dbg_regset_init(int reg_set)
+{
+	char name[2];
+
+	if (reg_set < 1 || reg_set > PM_DBG_MAX_REG_SETS ||
+		pm_dbg_reg_set[reg_set-1] != NULL)
+		return -EINVAL;
+
+	pm_dbg_reg_set[reg_set-1] =
+		kmalloc(pm_dbg_get_regset_size(), GFP_KERNEL);
+
+	if (pm_dbg_reg_set[reg_set-1] == NULL)
+		return -ENOMEM;
+
+	if (pm_dbg_dir != NULL) {
+		sprintf(name, "%d", reg_set);
+
+		(void) debugfs_create_file(name, S_IRUGO,
+			pm_dbg_dir, (void *)reg_set, &debug_reg_fops);
+	}
+
+	return 0;
+}
+
 static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
 {
 	int i;
@@ -307,7 +498,9 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
 
 static int __init pm_dbg_init(void)
 {
+	int i;
 	struct dentry *d;
+	char name[2];
 
 	printk(KERN_INFO "pm_dbg_init()\n");
 
@@ -322,6 +515,21 @@ static int __init pm_dbg_init(void)
 
 	pwrdm_for_each(pwrdms_setup, NULL);
 
+	pm_dbg_dir = debugfs_create_dir("registers", d);
+	if (IS_ERR(pm_dbg_dir))
+		return PTR_ERR(pm_dbg_dir);
+
+	(void) debugfs_create_file("current", S_IRUGO,
+		pm_dbg_dir, (void *)0, &debug_reg_fops);
+
+	for (i = 0; i < PM_DBG_MAX_REG_SETS; i++)
+		if (pm_dbg_reg_set[i] != NULL) {
+			sprintf(name, "%d", i+1);
+			(void) debugfs_create_file(name, S_IRUGO,
+				pm_dbg_dir, (void *)(i+1), &debug_reg_fops);
+
+		}
+
 	pm_dbg_init_done = 1;
 
 	return 0;
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
old mode 100644
new mode 100755
index b7d66be..8f1ebea
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -34,9 +34,13 @@ extern void omap3_pm_off_mode_enable(int);
 extern void omap2_pm_dump(int mode, int resume, unsigned int us);
 extern int omap2_pm_debug;
 extern void pm_dbg_update_time(struct powerdomain *pwrdm, int prev);
+extern int pm_dbg_regset_save(int reg_set);
+extern int pm_dbg_regset_init(int reg_set);
 #else
 #define omap2_pm_dump(mode, resume, us)		do {} while (0);
 #define omap2_pm_debug				0
 #define pm_dbg_update_time(pwrdm, prev) do {} while (0);
+#define pm_dbg_regset_save(reg_set) do {} while (0);
+#define pm_dbg_regset_init(reg_set) do {} while (0);
 #endif /* CONFIG_PM_DEBUG */
 #endif
-- 
1.5.4.3

Re: [PATCH 04/04] PM debug: Add PRCM register dump support

[Kevin Hilman]

Tero Kristo <tero.kristo@nokia.com> writes:

> Allows dumping out current register contents from the debug filesystem, and
> also allows user to add arbitrary register save points into code. Current
> register contents are available under debugfs at:
>
> [debugfs]/pm_debug/registers/current
>
> To add a save point, do following:
>
> From module init (or somewhere before the save call, called only once):
>   pm_dbg_init_regset(n); // n=1..4, allocates memory for dump area #n
>
> From arbitrary code location:
>   pm_dbg_regset_save(n); // n=1..4, saves registers to dump area #n
>
> After this, the register dump can be seen under [debugfs]/pm_debug/registers/n
>
> Signed-off-by: Tero Kristo <tero.kristo@nokia.com>


Excellent, I was hoping this feature would be coming along.

Pulling into next PM branch.

Kevin

> ---
>  arch/arm/mach-omap2/pm-debug.c |  208 ++++++++++++++++++++++++++++++++++++++++
>  arch/arm/mach-omap2/pm.h       |    4 +
>  2 files changed, 212 insertions(+), 0 deletions(-)
>  mode change 100644 => 100755 arch/arm/mach-omap2/pm-debug.c
>  mode change 100644 => 100755 arch/arm/mach-omap2/pm.h
>
> diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
> old mode 100644
> new mode 100755
> index d21af83..05f3914
> --- a/arch/arm/mach-omap2/pm-debug.c
> +++ b/arch/arm/mach-omap2/pm-debug.c
> @@ -159,6 +159,8 @@ void omap2_pm_dump(int mode, int resume, unsigned int us)
>  #include <linux/debugfs.h>
>  #include <linux/seq_file.h>
>  
> +static void pm_dbg_regset_store(u32 *ptr);
> +
>  struct dentry *pm_dbg_dir;
>  
>  static int pm_dbg_init_done;
> @@ -168,6 +170,159 @@ enum {
>  	DEBUG_FILE_TIMERS,
>  };
>  
> +struct pm_module_def {
> +	char name[8]; /* Name of the module */
> +	short type; /* CM or PRM */
> +	unsigned short offset;
> +	int low; /* First register address on this module */
> +	int high; /* Last register address on this module */
> +};
> +
> +#define MOD_CM 0
> +#define MOD_PRM 1
> +
> +static const struct pm_module_def pm_dbg_reg_modules[] = {
> +	{ "IVA2", MOD_CM, OMAP3430_IVA2_MOD, 0, 0x4c },
> +	{ "OCP", MOD_CM, OCP_MOD, 0, 0x10 },
> +	{ "MPU", MOD_CM, MPU_MOD, 4, 0x4c },
> +	{ "CORE", MOD_CM, CORE_MOD, 0, 0x4c },
> +	{ "SGX", MOD_CM, OMAP3430ES2_SGX_MOD, 0, 0x4c },
> +	{ "WKUP", MOD_CM, WKUP_MOD, 0, 0x40 },
> +	{ "CCR", MOD_CM, PLL_MOD, 0, 0x70 },
> +	{ "DSS", MOD_CM, OMAP3430_DSS_MOD, 0, 0x4c },
> +	{ "CAM", MOD_CM, OMAP3430_CAM_MOD, 0, 0x4c },
> +	{ "PER", MOD_CM, OMAP3430_PER_MOD, 0, 0x4c },
> +	{ "EMU", MOD_CM, OMAP3430_EMU_MOD, 0x40, 0x54 },
> +	{ "NEON", MOD_CM, OMAP3430_NEON_MOD, 0x20, 0x48 },
> +	{ "USB", MOD_CM, OMAP3430ES2_USBHOST_MOD, 0, 0x4c },
> +
> +	{ "IVA2", MOD_PRM, OMAP3430_IVA2_MOD, 0x50, 0xfc },
> +	{ "OCP", MOD_PRM, OCP_MOD, 4, 0x1c },
> +	{ "MPU", MOD_PRM, MPU_MOD, 0x58, 0xe8 },
> +	{ "CORE", MOD_PRM, CORE_MOD, 0x58, 0xf8 },
> +	{ "SGX", MOD_PRM, OMAP3430ES2_SGX_MOD, 0x58, 0xe8 },
> +	{ "WKUP", MOD_PRM, WKUP_MOD, 0xa0, 0xb0 },
> +	{ "CCR", MOD_PRM, PLL_MOD, 0x40, 0x70 },
> +	{ "DSS", MOD_PRM, OMAP3430_DSS_MOD, 0x58, 0xe8 },
> +	{ "CAM", MOD_PRM, OMAP3430_CAM_MOD, 0x58, 0xe8 },
> +	{ "PER", MOD_PRM, OMAP3430_PER_MOD, 0x58, 0xe8 },
> +	{ "EMU", MOD_PRM, OMAP3430_EMU_MOD, 0x58, 0xe4 },
> +	{ "GLBL", MOD_PRM, OMAP3430_GR_MOD, 0x20, 0xe4 },
> +	{ "NEON", MOD_PRM, OMAP3430_NEON_MOD, 0x58, 0xe8 },
> +	{ "USB", MOD_PRM, OMAP3430ES2_USBHOST_MOD, 0x58, 0xe8 },
> +	{ "", 0, 0, 0, 0 },
> +};
> +
> +#define PM_DBG_MAX_REG_SETS 4
> +
> +static void *pm_dbg_reg_set[PM_DBG_MAX_REG_SETS];
> +
> +static int pm_dbg_get_regset_size(void)
> +{
> +	static int regset_size;
> +
> +	if (regset_size == 0) {
> +		int i = 0;
> +
> +		while (pm_dbg_reg_modules[i].name[0] != 0) {
> +			regset_size += pm_dbg_reg_modules[i].high +
> +				4 - pm_dbg_reg_modules[i].low;
> +			i++;
> +		}
> +	}
> +	return regset_size;
> +}
> +
> +static int pm_dbg_show_regs(struct seq_file *s, void *unused)
> +{
> +	int i, j;
> +	unsigned long val;
> +	int reg_set = (int)s->private;
> +	u32 *ptr;
> +	void *store = NULL;
> +	int regs;
> +	int linefeed;
> +
> +	if (reg_set == 0) {
> +		store = kmalloc(pm_dbg_get_regset_size(), GFP_KERNEL);
> +		ptr = store;
> +		pm_dbg_regset_store(ptr);
> +	} else {
> +		ptr = pm_dbg_reg_set[reg_set - 1];
> +	}
> +
> +	i = 0;
> +
> +	while (pm_dbg_reg_modules[i].name[0] != 0) {
> +		regs = 0;
> +		linefeed = 0;
> +		if (pm_dbg_reg_modules[i].type == MOD_CM)
> +			seq_printf(s, "MOD: CM_%s (%08x)\n",
> +				pm_dbg_reg_modules[i].name,
> +				(u32)(OMAP2_CM_BASE +
> +				pm_dbg_reg_modules[i].offset));
> +		else
> +			seq_printf(s, "MOD: PRM_%s (%08x)\n",
> +				pm_dbg_reg_modules[i].name,
> +				(u32)(OMAP2_PRM_BASE +
> +				pm_dbg_reg_modules[i].offset));
> +
> +		for (j = pm_dbg_reg_modules[i].low;
> +			j <= pm_dbg_reg_modules[i].high; j += 4) {
> +			val = *(ptr++);
> +			if (val != 0) {
> +				regs++;
> +				if (linefeed) {
> +					seq_printf(s, "\n");
> +					linefeed = 0;
> +				}
> +				seq_printf(s, "  %02x => %08lx", j, val);
> +				if (regs % 4 == 0)
> +					linefeed = 1;
> +			}
> +		}
> +		seq_printf(s, "\n");
> +		i++;
> +	}
> +
> +	if (store != NULL)
> +		kfree(store);
> +
> +	return 0;
> +}
> +
> +static void pm_dbg_regset_store(u32 *ptr)
> +{
> +	int i, j;
> +	u32 val;
> +
> +	i = 0;
> +
> +	while (pm_dbg_reg_modules[i].name[0] != 0) {
> +		for (j = pm_dbg_reg_modules[i].low;
> +			j <= pm_dbg_reg_modules[i].high; j += 4) {
> +			if (pm_dbg_reg_modules[i].type == MOD_CM)
> +				val = cm_read_mod_reg(
> +					pm_dbg_reg_modules[i].offset, j);
> +			else
> +				val = prm_read_mod_reg(
> +					pm_dbg_reg_modules[i].offset, j);
> +			*(ptr++) = val;
> +		}
> +		i++;
> +	}
> +}
> +
> +int pm_dbg_regset_save(int reg_set)
> +{
> +	if (pm_dbg_reg_set[reg_set-1] == NULL)
> +		return -EINVAL;
> +
> +	pm_dbg_regset_store(pm_dbg_reg_set[reg_set-1]);
> +
> +	return 0;
> +}
> +
>  static const char pwrdm_state_names[][4] = {
>  	"OFF",
>  	"RET",
> @@ -281,6 +436,11 @@ static int pm_dbg_open(struct inode *inode, struct file *file)
>  	};
>  }
>  
> +static int pm_dbg_reg_open(struct inode *inode, struct file *file)
> +{
> +	return single_open(file, pm_dbg_show_regs, inode->i_private);
> +}
> +
>  static const struct file_operations debug_fops = {
>  	.open           = pm_dbg_open,
>  	.read           = seq_read,
> @@ -288,6 +448,37 @@ static const struct file_operations debug_fops = {
>  	.release        = single_release,
>  };
>  
> +static const struct file_operations debug_reg_fops = {
> +	.open           = pm_dbg_reg_open,
> +	.read           = seq_read,
> +	.llseek         = seq_lseek,
> +	.release        = single_release,
> +};
> +
> +int pm_dbg_regset_init(int reg_set)
> +{
> +	char name[2];
> +
> +	if (reg_set < 1 || reg_set > PM_DBG_MAX_REG_SETS ||
> +		pm_dbg_reg_set[reg_set-1] != NULL)
> +		return -EINVAL;
> +
> +	pm_dbg_reg_set[reg_set-1] =
> +		kmalloc(pm_dbg_get_regset_size(), GFP_KERNEL);
> +
> +	if (pm_dbg_reg_set[reg_set-1] == NULL)
> +		return -ENOMEM;
> +
> +	if (pm_dbg_dir != NULL) {
> +		sprintf(name, "%d", reg_set);
> +
> +		(void) debugfs_create_file(name, S_IRUGO,
> +			pm_dbg_dir, (void *)reg_set, &debug_reg_fops);
> +	}
> +
> +	return 0;
> +}
> +
>  static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
>  {
>  	int i;
> @@ -307,7 +498,9 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
>  
>  static int __init pm_dbg_init(void)
>  {
> +	int i;
>  	struct dentry *d;
> +	char name[2];
>  
>  	printk(KERN_INFO "pm_dbg_init()\n");
>  
> @@ -322,6 +515,21 @@ static int __init pm_dbg_init(void)
>  
>  	pwrdm_for_each(pwrdms_setup, NULL);
>  
> +	pm_dbg_dir = debugfs_create_dir("registers", d);
> +	if (IS_ERR(pm_dbg_dir))
> +		return PTR_ERR(pm_dbg_dir);
> +
> +	(void) debugfs_create_file("current", S_IRUGO,
> +		pm_dbg_dir, (void *)0, &debug_reg_fops);
> +
> +	for (i = 0; i < PM_DBG_MAX_REG_SETS; i++)
> +		if (pm_dbg_reg_set[i] != NULL) {
> +			sprintf(name, "%d", i+1);
> +			(void) debugfs_create_file(name, S_IRUGO,
> +				pm_dbg_dir, (void *)(i+1), &debug_reg_fops);
> +
> +		}
> +
>  	pm_dbg_init_done = 1;
>  
>  	return 0;
> diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
> old mode 100644
> new mode 100755
> index b7d66be..8f1ebea
> --- a/arch/arm/mach-omap2/pm.h
> +++ b/arch/arm/mach-omap2/pm.h
> @@ -34,9 +34,13 @@ extern void omap3_pm_off_mode_enable(int);
>  extern void omap2_pm_dump(int mode, int resume, unsigned int us);
>  extern int omap2_pm_debug;
>  extern void pm_dbg_update_time(struct powerdomain *pwrdm, int prev);
> +extern int pm_dbg_regset_save(int reg_set);
> +extern int pm_dbg_regset_init(int reg_set);
>  #else
>  #define omap2_pm_dump(mode, resume, us)		do {} while (0);
>  #define omap2_pm_debug				0
>  #define pm_dbg_update_time(pwrdm, prev) do {} while (0);
> +#define pm_dbg_regset_save(reg_set) do {} while (0);
> +#define pm_dbg_regset_init(reg_set) do {} while (0);
>  #endif /* CONFIG_PM_DEBUG */
>  #endif
> -- 
> 1.5.4.3
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-omap" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 03/04] PM counters: fix initialization race condition

[Kevin Hilman]

Tero Kristo <tero.kristo@nokia.com> writes:

> Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
> ---
>  arch/arm/mach-omap2/clockdomain.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
> index b0b5885..b27afc0 100644
> --- a/arch/arm/mach-omap2/clockdomain.c
> +++ b/arch/arm/mach-omap2/clockdomain.c
> @@ -481,6 +481,8 @@ void omap2_clkdm_allow_idle(struct clockdomain *clkdm)
>  			    v << __ffs(clkdm->clktrctrl_mask),
>  			    clkdm->pwrdm.ptr->prcm_offs,
>  			    CM_CLKSTCTRL);
> +
> +	pwrdm_clkdm_state_switch(clkdm);
>  }
>  
>  /**

Thanks, pulling into next PM branch.

Kevin

Re: [PATCH 02/04] PM debug: do not print out status for meta powerdomains (dpll*)

[Kevin Hilman]

Tero Kristo <tero.kristo@nokia.com> writes:

> Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
> ---
>  arch/arm/mach-omap2/pm-debug.c |    6 ++++--
>  1 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
> index c903c55..d21af83 100644
> --- a/arch/arm/mach-omap2/pm-debug.c
> +++ b/arch/arm/mach-omap2/pm-debug.c
> @@ -197,7 +197,8 @@ static int clkdm_dbg_show_counter(struct clockdomain *clkdm, void *user)
>  	struct seq_file *s = (struct seq_file *)user;
>  
>  	if (strcmp(clkdm->name, "emu_clkdm") == 0 ||
> -		strcmp(clkdm->name, "wkup_clkdm") == 0)
> +		strcmp(clkdm->name, "wkup_clkdm") == 0 ||
> +		strncmp(clkdm->name, "dpll", 4) == 0)
>  		return 0;
>  
>  	seq_printf(s, "%s->%s (%d)", clkdm->name,
> @@ -214,7 +215,8 @@ static int pwrdm_dbg_show_counter(struct powerdomain *pwrdm, void *user)
>  	int i;
>  
>  	if (strcmp(pwrdm->name, "emu_pwrdm") == 0 ||
> -		strcmp(pwrdm->name, "wkup_pwrdm") == 0)
> +		strcmp(pwrdm->name, "wkup_pwrdm") == 0 ||
> +		strncmp(pwrdm->name, "dpll", 4) == 0)
>  		return 0;
>  
>  	if (pwrdm->state != pwrdm_read_pwrst(pwrdm))
> -- 
> 1.5.4.3
>

Thanks, pulling into next PM branch.

Kevin

Re: [PATCH 01/04] Fix cpuidle off-modes to be controlled via sysfs

[Kevin Hilman]

Tero Kristo <tero.kristo@nokia.com> writes:

> Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
> ---
>  arch/arm/mach-omap2/cpuidle34xx.c |   21 ++++++++++++++++++---
>  arch/arm/mach-omap2/pm.c          |    4 ++--
>  2 files changed, 20 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
> index 235976e..f97c4d8 100644
> --- a/arch/arm/mach-omap2/cpuidle34xx.c
> +++ b/arch/arm/mach-omap2/cpuidle34xx.c
> @@ -29,6 +29,8 @@
>  #include <mach/control.h>
>  #include <mach/common.h>
>  
> +#include "pm.h"
> +
>  #ifdef CONFIG_CPU_IDLE
>  
>  #define OMAP3_MAX_STATES 7
> @@ -77,6 +79,8 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
>  {
>  	struct omap3_processor_cx *cx = cpuidle_get_statedata(state);
>  	struct timespec ts_preidle, ts_postidle, ts_idle;
> +	int mpu_next_state;
> +	int core_next_state;
>  
>  	current_cx_state = *cx;
>  
> @@ -89,8 +93,19 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
>  	local_irq_disable();
>  	local_fiq_disable();
>  
> -	set_pwrdm_state(mpu_pd, cx->mpu_state);
> -	set_pwrdm_state(core_pd, cx->core_state);
> +	/* Dirty hack to enable / disable off-mode dynamically */
> +	mpu_next_state = cx->mpu_state;
> +	core_next_state = cx->core_state;
> +
> +	if (!enable_off_mode) {
> +		if (mpu_next_state == PWRDM_POWER_OFF)
> +			mpu_next_state = PWRDM_POWER_RET;
> +		if (core_next_state == PWRDM_POWER_OFF)
> +			core_next_state = PWRDM_POWER_RET;
> +	}
> +
> +	set_pwrdm_state(mpu_pd, mpu_next_state);
> +	set_pwrdm_state(core_pd, core_next_state);
>  
>  	if (omap_irq_pending())
>  		goto return_sleep_time;
> @@ -195,7 +210,7 @@ void omap_init_power_states(void)
>  				CPUIDLE_FLAG_CHECK_BM;
>  
>  	/* C6 . MPU OFF + Core OFF */
> -	omap3_power_states[OMAP3_STATE_C6].valid = 0;
> +	omap3_power_states[OMAP3_STATE_C6].valid = 1;
>  	omap3_power_states[OMAP3_STATE_C6].type = OMAP3_STATE_C6;
>  	omap3_power_states[OMAP3_STATE_C6].sleep_latency = 10000;
>  	omap3_power_states[OMAP3_STATE_C6].wakeup_latency = 30000;
> diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
> index 136683b..9dbe7e2 100644
> --- a/arch/arm/mach-omap2/pm.c
> +++ b/arch/arm/mach-omap2/pm.c
> @@ -87,9 +87,9 @@ static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr,
>  	} else if (attr == &clocks_off_while_idle_attr) {
>  		clocks_off_while_idle = value;
>  	} else if (attr == &enable_off_mode_attr) {
> -		int enable = (value > 0) ? 1 : 0;
> +		enable_off_mode = (value > 0) ? 1 : 0;
>  
> -		omap3_pm_off_mode_enable(enable);
> +		omap3_pm_off_mode_enable(enable_off_mode);
>  	} else if (attr == &voltage_off_while_idle_attr) {
>  		voltage_off_while_idle = value;
>  		if (voltage_off_while_idle)

I already have similar version to this in the staging area for the
next PM branch[1] (which is not quite ready.)

Kevin

[1] http://git.kernel.org/?p=linux/kernel/git/khilman/linux-omap-pm.git;a=shortlog;h=tmp/pm-next