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Message-Id: <1215703653.13431.70.camel@odin>
Date: Thu, 10 Jul 2008 16:27:33 +0100
From: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel <linux-kernel@...r.kernel.org>,
arm kernel <linux-arm-kernel@...ts.arm.linux.org.uk>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH 14/15] regulator: core - added system suspend state sysfs
entries. (new for V5)
Allow regulator suspend state and voltage to be published to
userspace via sysfs. Note: suspend state config API for consumers
has still to be added.
Signed-off-by: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
---
Documentation/ABI/testing/sysfs-class-regulator | 128 +++++++++++++++++++++
drivers/regulator/core.c | 140 ++++++++++++++++++++++-
include/linux/regulator/driver.h | 13 ++
3 files changed, 280 insertions(+), 1 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-class-regulator b/Documentation/ABI/testing/sysfs-class-regulator
index 4655927..79a4a75 100644
--- a/Documentation/ABI/testing/sysfs-class-regulator
+++ b/Documentation/ABI/testing/sysfs-class-regulator
@@ -185,3 +185,131 @@ Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
Description:
Some regulator directories will contain a link called parent.
This points to the parent or supply regulator if one exists.
+
+What: /sys/class/regulator/.../suspend_mem_microvolts
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_mem_microvolts. This holds the regulator output
+ voltage setting for this domain measured in microvolts when
+ the system is suspended to memory.
+
+ NOTE: this will return the string 'not defined' if
+ the power domain has no suspend to memory voltage defined by
+ platform code.
+
+What: /sys/class/regulator/.../suspend_disk_microvolts
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_disk_microvolts. This holds the regulator output
+ voltage setting for this domain measured in microvolts when
+ the system is suspended to disk.
+
+ NOTE: this will return the string 'not defined' if
+ the power domain has no suspend to disk voltage defined by
+ platform code.
+
+What: /sys/class/regulator/.../suspend_standby_microvolts
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_standby_microvolts. This holds the regulator output
+ voltage setting for this domain measured in microvolts when
+ the system is suspended to standby.
+
+ NOTE: this will return the string 'not defined' if
+ the power domain has no suspend to standby voltage defined by
+ platform code.
+
+What: /sys/class/regulator/.../suspend_mem_mode
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_mem_mode. This holds the regulator operating mode
+ setting for this domain when the system is suspended to
+ memory.
+
+ NOTE: this will return the string 'not defined' if
+ the power domain has no suspend to memory mode defined by
+ platform code.
+
+What: /sys/class/regulator/.../suspend_disk_mode
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_disk_mode. This holds the regulator operating mode
+ setting for this domain when the system is suspended to disk.
+
+ NOTE: this will return the string 'not defined' if
+ the power domain has no suspend to disk mode defined by
+ platform code.
+
+What: /sys/class/regulator/.../suspend_standby_mode
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_standby_mode. This holds the regulator operating mode
+ setting for this domain when the system is suspended to
+ standby.
+
+ NOTE: this will return the string 'not defined' if
+ the power domain has no suspend to standby mode defined by
+ platform code.
+
+What: /sys/class/regulator/.../suspend_mem_state
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_mem_state. This holds the regulator operating state
+ when suspended to memory.
+
+ This will be one of the following strings:
+
+ 'enabled'
+ 'disabled'
+ 'not defined'
+
+What: /sys/class/regulator/.../suspend_disk_state
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_disk_state. This holds the regulator operating state
+ when suspended to disk.
+
+ This will be one of the following strings:
+
+ 'enabled'
+ 'disabled'
+ 'not defined'
+
+What: /sys/class/regulator/.../suspend_standby_state
+Date: May 2008
+KernelVersion: 2.6.26
+Contact: Liam Girdwood <lg@...nsource.wolfsonmicro.com>
+Description:
+ Each regulator directory will contain a field called
+ suspend_standby_state. This holds the regulator operating
+ state when suspended to standby.
+
+ This will be one of the following strings:
+
+ 'enabled'
+ 'disabled'
+ 'not defined'
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index da77b05..50fc224 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -338,7 +338,7 @@ static ssize_t regulator_total_uA_show(struct device *dev,
}
static ssize_t regulator_num_users_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
struct regulator_dev *rdev = to_rdev(dev);
return sprintf(buf, "%d\n", rdev->use_count);
@@ -358,6 +358,126 @@ static ssize_t regulator_type_show(struct device *dev,
return sprintf(buf, "unknown\n");
}
+static ssize_t regulator_suspend_mem_uV_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+ return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV);
+}
+
+static ssize_t regulator_suspend_disk_uV_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+ return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV);
+}
+
+static ssize_t regulator_suspend_standby_uV_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+ return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV);
+}
+
+static ssize_t suspend_opmode_show(struct regulator_dev *rdev,
+ unsigned int mode, char *buf)
+{
+ switch (mode) {
+ case REGULATOR_MODE_FAST:
+ return sprintf(buf, "fast\n");
+ case REGULATOR_MODE_NORMAL:
+ return sprintf(buf, "normal\n");
+ case REGULATOR_MODE_IDLE:
+ return sprintf(buf, "idle\n");
+ case REGULATOR_MODE_STANDBY:
+ return sprintf(buf, "standby\n");
+ }
+ return sprintf(buf, "unknown\n");
+}
+
+static ssize_t regulator_suspend_mem_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+ return suspend_opmode_show(rdev,
+ rdev->constraints->state_mem.mode, buf);
+}
+
+static ssize_t regulator_suspend_disk_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+ return suspend_opmode_show(rdev,
+ rdev->constraints->state_disk.mode, buf);
+}
+
+static ssize_t regulator_suspend_standby_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+ return suspend_opmode_show(rdev,
+ rdev->constraints->state_standby.mode, buf);
+}
+
+static ssize_t regulator_suspend_mem_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+
+ if (rdev->constraints->state_mem.enabled)
+ return sprintf(buf, "enabled\n");
+ else
+ return sprintf(buf, "disabled\n");
+}
+
+static ssize_t regulator_suspend_disk_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+
+ if (rdev->constraints->state_disk.enabled)
+ return sprintf(buf, "enabled\n");
+ else
+ return sprintf(buf, "disabled\n");
+}
+
+static ssize_t regulator_suspend_standby_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct regulator_dev *rdev = to_rdev(dev);
+
+ if (!rdev->constraints)
+ return sprintf(buf, "not defined\n");
+
+ if (rdev->constraints->state_standby.enabled)
+ return sprintf(buf, "enabled\n");
+ else
+ return sprintf(buf, "disabled\n");
+}
static struct device_attribute regulator_dev_attrs[] = {
__ATTR(microvolts, 0444, regulator_uV_show, NULL),
__ATTR(microamps, 0444, regulator_uA_show, NULL),
@@ -370,6 +490,24 @@ static struct device_attribute regulator_dev_attrs[] = {
__ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL),
__ATTR(num_users, 0444, regulator_num_users_show, NULL),
__ATTR(type, 0444, regulator_type_show, NULL),
+ __ATTR(suspend_mem_microvolts, 0444,
+ regulator_suspend_mem_uV_show, NULL),
+ __ATTR(suspend_disk_microvolts, 0444,
+ regulator_suspend_disk_uV_show, NULL),
+ __ATTR(suspend_standby_microvolts, 0444,
+ regulator_suspend_standby_uV_show, NULL),
+ __ATTR(suspend_mem_mode, 0444,
+ regulator_suspend_mem_mode_show, NULL),
+ __ATTR(suspend_disk_mode, 0444,
+ regulator_suspend_disk_mode_show, NULL),
+ __ATTR(suspend_standby_mode, 0444,
+ regulator_suspend_standby_mode_show, NULL),
+ __ATTR(suspend_mem_state, 0444,
+ regulator_suspend_mem_state_show, NULL),
+ __ATTR(suspend_disk_state, 0444,
+ regulator_suspend_disk_state_show, NULL),
+ __ATTR(suspend_standby_state, 0444,
+ regulator_suspend_standby_state_show, NULL),
__ATTR_NULL,
};
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 1c02362..1d712c7 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -49,6 +49,19 @@ struct regulator_ops {
/* get most efficient regulator operating mode for load */
unsigned int (*get_optimum_mode) (struct regulator_dev *, int input_uV,
int output_uV, int load_uA);
+
+ /* the operations below are for configuration of regulator state when
+ * it's parent PMIC enters a global STANBY/HIBERNATE state */
+
+ /* set regulator suspend voltage */
+ int (*set_suspend_voltage) (struct regulator_dev *, int uV);
+
+ /* enable/disable regulator in suspend state */
+ int (*set_suspend_enable) (struct regulator_dev *);
+ int (*set_suspend_disable) (struct regulator_dev *);
+
+ /* set regulator suspend operating mode (defined in regulator.h) */
+ int (*set_suspend_mode) (struct regulator_dev *, unsigned int mode);
};
/*
--
1.5.4.3
--
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