linux-kernel - [PATCH 27/57] power: sysfs interface update

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Date:	Tue, 25 Sep 2012 10:12:24 -0600
From:	mathieu.poirier@...aro.org
To:	linux-kernel@...r.kernel.org, cbou@...l.ru, dwmw2@...radead.org
Cc:	mathieu.poirier@...aro.org
Subject: [PATCH 27/57] power: sysfs interface update

From: Michel JAOUEN <michel.jaouen@...ricsson.com>

Add new sysfs interface to get current charge status

Signed-off-by: Michel JAOUEN <michel.jaouen@...ricsson.com>
Signed-off-by: Loic Pallardy <loic.pallardy@...ricsson.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Reviewed-by: Marcus COOPER <marcus.xm.cooper@...ricsson.com>
Reviewed-by: Olivier CLERGEAUD <olivier.clergeaud@...ricsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@...ricsson.com>
---
 drivers/power/ab8500_charger.c  |    3 +++
 drivers/power/abx500_chargalg.c |   24 +++++++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletions(-)

diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index 4129599..0a781a0 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -2759,6 +2759,9 @@ static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
 	enum ab8500_usb_state bm_usb_state;
 	unsigned mA = *((unsigned *)power);
 
+	if (di == NULL)
+		return NOTIFY_DONE;
+
 	if (event != USB_EVENT_VBUS) {
 		dev_dbg(di->dev, "not a standard host, returning\n");
 		return NOTIFY_DONE;
diff --git a/drivers/power/abx500_chargalg.c b/drivers/power/abx500_chargalg.c
index d3efc2a..4e3d20f 100644
--- a/drivers/power/abx500_chargalg.c
+++ b/drivers/power/abx500_chargalg.c
@@ -1679,6 +1679,27 @@ static int abx500_chargalg_get_property(struct power_supply *psy,
 	return 0;
 }
 
+/**
+ * abx500_chargalg_sysfs_show() - sysfs show operations
+ * @kobj:      pointer to the struct kobject
+ * @attr:      pointer to the struct attribute
+ * @buf:       buffer that holds the parameter to send to userspace
+ *
+ * Returns a buffer to be displayed in user space
+ */
+static ssize_t abx500_chargalg_sysfs_show(struct kobject *kobj,
+	struct attribute *attr, char *buf)
+{
+	struct abx500_chargalg *di = container_of(kobj,
+		struct abx500_chargalg, chargalg_kobject);
+
+	if ((di->susp_status.ac_suspended == true) &&
+		(di->susp_status.usb_suspended == true))
+		return sprintf(buf, "0\n");
+	else
+		return sprintf(buf, "1\n");
+}
+
 /* Exposure to the sysfs interface */
 
 /**
@@ -1749,7 +1770,7 @@ static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj,
 static struct attribute abx500_chargalg_en_charger = \
 {
 	.name = "chargalg",
-	.mode = S_IWUGO,
+	.mode = S_IRUGO | S_IWUSR,
 };
 
 static struct attribute *abx500_chargalg_chg[] = {
@@ -1758,6 +1779,7 @@ static struct attribute *abx500_chargalg_chg[] = {
 };
 
 static const struct sysfs_ops abx500_chargalg_sysfs_ops = {
+	.show = abx500_chargalg_sysfs_show,
 	.store = abx500_chargalg_sysfs_charger,
 };
 
-- 
1.7.5.4

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