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Message-Id: <1360932310-30065-5-git-send-email-lee.jones@linaro.org>
Date: Fri, 15 Feb 2013 12:44:34 +0000
From: Lee Jones <lee.jones@...aro.org>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: arnd@...db.de, linus.walleij@...ricsson.com,
cbouatmailru@...il.com, sameo@...ux.intel.com,
Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 04/40] ab8500-fg: Add power cut feature for ab8505 and ab8540
Add support for a power cut feature which allows user to
configure when ab8505 and ab8540 based platforms should shut
down system due to low battery.
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
drivers/mfd/ab8500-core.c | 36 +++
drivers/power/ab8500_bmdata.c | 5 +
drivers/power/ab8500_fg.c | 426 ++++++++++++++++++++++++++++++++++
include/linux/mfd/abx500.h | 10 +
include/linux/mfd/abx500/ab8500-bm.h | 18 ++
5 files changed, 495 insertions(+)
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 4c4aa19..4011d40 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -109,6 +109,7 @@
#define AB8500_SWITCH_OFF_STATUS 0x00
#define AB8500_TURN_ON_STATUS 0x00
+#define AB8505_TURN_ON_STATUS_2 0x04
static bool no_bm; /* No battery management */
module_param(no_bm, bool, S_IRUGO);
@@ -1147,6 +1148,21 @@ static ssize_t show_turn_on_status(struct device *dev,
return sprintf(buf, "%#x\n", value);
}
+static ssize_t show_turn_on_status_2(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int ret;
+ u8 value;
+ struct ab8500 *ab8500;
+
+ ab8500 = dev_get_drvdata(dev);
+ ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
+ AB8505_TURN_ON_STATUS_2, &value);
+ if (ret < 0)
+ return ret;
+ return sprintf(buf, "%#x\n", (value & 0x1));
+}
+
static ssize_t show_ab9540_dbbrstn(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -1203,6 +1219,7 @@ exit:
static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);
+static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL);
static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR,
show_ab9540_dbbrstn, store_ab9540_dbbrstn);
@@ -1213,6 +1230,11 @@ static struct attribute *ab8500_sysfs_entries[] = {
NULL,
};
+static struct attribute *ab8505_sysfs_entries[] = {
+ &dev_attr_turn_on_status_2.attr,
+ NULL,
+};
+
static struct attribute *ab9540_sysfs_entries[] = {
&dev_attr_chip_id.attr,
&dev_attr_switch_off_status.attr,
@@ -1225,6 +1247,10 @@ static struct attribute_group ab8500_attr_group = {
.attrs = ab8500_sysfs_entries,
};
+static struct attribute_group ab8505_attr_group = {
+ .attrs = ab8505_sysfs_entries,
+};
+
static struct attribute_group ab9540_attr_group = {
.attrs = ab9540_sysfs_entries,
};
@@ -1434,6 +1460,12 @@ static int ab8500_probe(struct platform_device *pdev)
else
ret = sysfs_create_group(&ab8500->dev->kobj,
&ab8500_attr_group);
+
+ if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
+ ab8500->chip_id >= AB8500_CUT2P0)
+ ret = sysfs_create_group(&ab8500->dev->kobj,
+ &ab8505_attr_group);
+
if (ret)
dev_err(ab8500->dev, "error creating sysfs entries\n");
@@ -1449,6 +1481,10 @@ static int ab8500_remove(struct platform_device *pdev)
else
sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group);
+ if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
+ ab8500->chip_id >= AB8500_CUT2P0)
+ sysfs_remove_group(&ab8500->dev->kobj, &ab8505_attr_group);
+
mfd_remove_devices(ab8500->dev);
return 0;
diff --git a/drivers/power/ab8500_bmdata.c b/drivers/power/ab8500_bmdata.c
index 20c157b..17744d9 100644
--- a/drivers/power/ab8500_bmdata.c
+++ b/drivers/power/ab8500_bmdata.c
@@ -407,6 +407,11 @@ static const struct abx500_fg_parameters fg = {
.battok_raising_th_sel1 = 2860,
.maint_thres = 95,
.user_cap_limit = 15,
+ .pcut_enable = 1,
+ .pcut_max_time = 127,
+ .pcut_flag_time = 112,
+ .pcut_max_restart = 15,
+ .pcut_debounce_time = 2,
};
static const struct abx500_maxim_parameters maxi_params = {
diff --git a/drivers/power/ab8500_fg.c b/drivers/power/ab8500_fg.c
index 25dae4c..9d33546 100644
--- a/drivers/power/ab8500_fg.c
+++ b/drivers/power/ab8500_fg.c
@@ -2344,6 +2344,50 @@ static int ab8500_fg_init_hw_registers(struct ab8500_fg *di)
dev_err(di->dev, "BattOk init write failed.\n");
goto out;
}
+
+ if (((is_ab8505(di->parent) || is_ab9540(di->parent)) &&
+ abx500_get_chip_id(di->dev) >= AB8500_CUT2P0)
+ || is_ab8540(di->parent)) {
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_MAX_TIME_REG, di->bm->fg_params->pcut_max_time);
+
+ if (ret) {
+ dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_MAX_TIME_REG\n", __func__);
+ goto out;
+ };
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_FLAG_TIME_REG, di->bm->fg_params->pcut_flag_time);
+
+ if (ret) {
+ dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_FLAG_TIME_REG\n", __func__);
+ goto out;
+ };
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_RESTART_REG, di->bm->fg_params->pcut_max_restart);
+
+ if (ret) {
+ dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_RESTART_REG\n", __func__);
+ goto out;
+ };
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_DEBOUNCE_REG, di->bm->fg_params->pcut_debounce_time);
+
+ if (ret) {
+ dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_DEBOUNCE_REG\n", __func__);
+ goto out;
+ };
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_CTL_STATUS_REG, di->bm->fg_params->pcut_enable);
+
+ if (ret) {
+ dev_err(di->dev, "%s write failed AB8505_RTC_PCUT_CTL_STATUS_REG\n", __func__);
+ goto out;
+ };
+ }
out:
return ret;
}
@@ -2546,6 +2590,388 @@ static int ab8500_fg_sysfs_init(struct ab8500_fg *di)
return ret;
}
+
+static ssize_t ab8505_powercut_flagtime_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_FLAG_TIME_REG, ®_value);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to read AB8505_RTC_PCUT_FLAG_TIME_REG\n");
+ goto fail;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F));
+
+fail:
+ return ret;
+}
+
+static ssize_t ab8505_powercut_flagtime_write(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ long unsigned reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ reg_value = simple_strtoul(buf, NULL, 10);
+
+ if (reg_value > 0x7F) {
+ dev_err(dev, "Incorrect parameter, echo 0 (1.98s) - 127 (15.625ms) for flagtime\n");
+ goto fail;
+ }
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_FLAG_TIME_REG, (u8)reg_value);
+
+ if (ret < 0)
+ dev_err(dev, "Failed to set AB8505_RTC_PCUT_FLAG_TIME_REG\n");
+
+fail:
+ return count;
+}
+
+static ssize_t ab8505_powercut_maxtime_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_MAX_TIME_REG, ®_value);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to read AB8505_RTC_PCUT_MAX_TIME_REG\n");
+ goto fail;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F));
+
+fail:
+ return ret;
+
+}
+
+static ssize_t ab8505_powercut_maxtime_write(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ int reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ reg_value = simple_strtoul(buf, NULL, 10);
+ if (reg_value > 0x7F) {
+ dev_err(dev, "Incorrect parameter, echo 0 (0.0s) - 127 (1.98s) for maxtime\n");
+ goto fail;
+ }
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_MAX_TIME_REG, (u8)reg_value);
+
+ if (ret < 0)
+ dev_err(dev, "Failed to set AB8505_RTC_PCUT_MAX_TIME_REG\n");
+
+fail:
+ return count;
+}
+
+static ssize_t ab8505_powercut_restart_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_RESTART_REG, ®_value);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n");
+ goto fail;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF));
+
+fail:
+ return ret;
+}
+
+static ssize_t ab8505_powercut_restart_write(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ int reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ reg_value = simple_strtoul(buf, NULL, 10);
+ if (reg_value > 0xF) {
+ dev_err(dev, "Incorrect parameter, echo 0 - 15 for number of restart\n");
+ goto fail;
+ }
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_RESTART_REG, (u8)reg_value);
+
+ if (ret < 0)
+ dev_err(dev, "Failed to set AB8505_RTC_PCUT_RESTART_REG\n");
+
+fail:
+ return count;
+
+}
+
+static ssize_t ab8505_powercut_timer_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_TIME_REG, ®_value);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to read AB8505_RTC_PCUT_TIME_REG\n");
+ goto fail;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7F));
+
+fail:
+ return ret;
+}
+
+static ssize_t ab8505_powercut_restart_counter_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_RESTART_REG, ®_value);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to read AB8505_RTC_PCUT_RESTART_REG\n");
+ goto fail;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0xF0) >> 4);
+
+fail:
+ return ret;
+}
+
+static ssize_t ab8505_powercut_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value);
+
+ if (ret < 0)
+ goto fail;
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x1));
+
+fail:
+ return ret;
+}
+
+static ssize_t ab8505_powercut_write(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ int reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ reg_value = simple_strtoul(buf, NULL, 10);
+ if (reg_value > 0x1) {
+ dev_err(dev, "Incorrect parameter, echo 0/1 to disable/enable Pcut feature\n");
+ goto fail;
+ }
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_CTL_STATUS_REG, (u8)reg_value);
+
+ if (ret < 0)
+ dev_err(dev, "Failed to set AB8505_RTC_PCUT_CTL_STATUS_REG\n");
+
+fail:
+ return count;
+}
+
+static ssize_t ab8505_powercut_flag_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n");
+ goto fail;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x10) >> 4));
+
+fail:
+ return ret;
+}
+
+static ssize_t ab8505_powercut_debounce_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_DEBOUNCE_REG, ®_value);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to read AB8505_RTC_PCUT_DEBOUNCE_REG\n");
+ goto fail;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", (reg_value & 0x7));
+
+fail:
+ return ret;
+}
+
+static ssize_t ab8505_powercut_debounce_write(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int ret;
+ int reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ reg_value = simple_strtoul(buf, NULL, 10);
+ if (reg_value > 0x7) {
+ dev_err(dev, "Incorrect parameter, echo 0 to 7 for debounce setting\n");
+ goto fail;
+ }
+
+ ret = abx500_set_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_DEBOUNCE_REG, (u8)reg_value);
+
+ if (ret < 0)
+ dev_err(dev, "Failed to set AB8505_RTC_PCUT_DEBOUNCE_REG\n");
+
+fail:
+ return count;
+}
+
+static ssize_t ab8505_powercut_enable_status_read(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 reg_value;
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct ab8500_fg *di;
+
+ di = to_ab8500_fg_device_info(psy);
+
+ ret = abx500_get_register_interruptible(di->dev, AB8500_RTC,
+ AB8505_RTC_PCUT_CTL_STATUS_REG, ®_value);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to read AB8505_RTC_PCUT_CTL_STATUS_REG\n");
+ goto fail;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%d\n", ((reg_value & 0x20) >> 5));
+
+fail:
+ return ret;
+}
+
+static struct device_attribute ab8505_fg_sysfs_psy_attrs[] = {
+ __ATTR(powercut_flagtime, (S_IRUGO | S_IWUSR | S_IWGRP),
+ ab8505_powercut_flagtime_read, ab8505_powercut_flagtime_write),
+ __ATTR(powercut_maxtime, (S_IRUGO | S_IWUSR | S_IWGRP),
+ ab8505_powercut_maxtime_read, ab8505_powercut_maxtime_write),
+ __ATTR(powercut_restart_max, (S_IRUGO | S_IWUSR | S_IWGRP),
+ ab8505_powercut_restart_read, ab8505_powercut_restart_write),
+ __ATTR(powercut_timer, S_IRUGO, ab8505_powercut_timer_read, NULL),
+ __ATTR(powercut_restart_counter, S_IRUGO,
+ ab8505_powercut_restart_counter_read, NULL),
+ __ATTR(powercut_enable, (S_IRUGO | S_IWUSR | S_IWGRP),
+ ab8505_powercut_read, ab8505_powercut_write),
+ __ATTR(powercut_flag, S_IRUGO, ab8505_powercut_flag_read, NULL),
+ __ATTR(powercut_debounce_time, (S_IRUGO | S_IWUSR | S_IWGRP),
+ ab8505_powercut_debounce_read, ab8505_powercut_debounce_write),
+ __ATTR(powercut_enable_status, S_IRUGO,
+ ab8505_powercut_enable_status_read, NULL),
+};
+
/* Exposure to the sysfs interface <<END>> */
#if defined(CONFIG_PM)
diff --git a/include/linux/mfd/abx500.h b/include/linux/mfd/abx500.h
index 1beaa05..21b3f67 100644
--- a/include/linux/mfd/abx500.h
+++ b/include/linux/mfd/abx500.h
@@ -89,6 +89,11 @@ struct abx500_fg;
* points.
* @maint_thres This is the threshold where we stop reporting
* battery full while in maintenance, in per cent
+ * @pcut_enable: Enable power cut feature in ab8505
+ * @pcut_max_time: Max time threshold
+ * @pcut_flag_time: Flagtime threshold
+ * @pcut_max_restart: Max number of restarts
+ * @pcut_debounce_time: Sets battery debounce time
*/
struct abx500_fg_parameters {
int recovery_sleep_timer;
@@ -106,6 +111,11 @@ struct abx500_fg_parameters {
int battok_raising_th_sel1;
int user_cap_limit;
int maint_thres;
+ bool pcut_enable;
+ u8 pcut_max_time;
+ u8 pcut_flag_time;
+ u8 pcut_max_restart;
+ u8 pcut_debounce_time;
};
/**
diff --git a/include/linux/mfd/abx500/ab8500-bm.h b/include/linux/mfd/abx500/ab8500-bm.h
index 345bc15..ff2ac0b 100644
--- a/include/linux/mfd/abx500/ab8500-bm.h
+++ b/include/linux/mfd/abx500/ab8500-bm.h
@@ -235,6 +235,14 @@
/* Battery type */
#define BATTERY_UNKNOWN 00
+/* Registers for pcut feature in ab8505 and ab9540 */
+#define AB8505_RTC_PCUT_CTL_STATUS_REG 0x12
+#define AB8505_RTC_PCUT_TIME_REG 0x13
+#define AB8505_RTC_PCUT_MAX_TIME_REG 0x14
+#define AB8505_RTC_PCUT_FLAG_TIME_REG 0x15
+#define AB8505_RTC_PCUT_RESTART_REG 0x16
+#define AB8505_RTC_PCUT_DEBOUNCE_REG 0x17
+
/**
* struct res_to_temp - defines one point in a temp to res curve. To
* be used in battery packs that combines the identification resistor with a
@@ -283,6 +291,11 @@ struct ab8500_fg;
* points.
* @maint_thres This is the threshold where we stop reporting
* battery full while in maintenance, in per cent
+ * @pcut_enable: Enable power cut feature in ab8505
+ * @pcut_max_time: Max time threshold
+ * @pcut_flag_time: Flagtime threshold
+ * @pcut_max_restart: Max number of restarts
+ * @pcut_debunce_time: Sets battery debounce time
*/
struct ab8500_fg_parameters {
int recovery_sleep_timer;
@@ -299,6 +312,11 @@ struct ab8500_fg_parameters {
int battok_raising_th_sel1;
int user_cap_limit;
int maint_thres;
+ bool pcut_enable;
+ u8 pcut_max_time;
+ u8 pcut_flag_time;
+ u8 pcut_max_restart;
+ u8 pcut_debunce_time;
};
/**
--
1.7.10.4
--
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