[PATCH] pcmcia: runtime powermanagement interface

With the "power/state" sysfs interface being deprecated, make another
one available which is compatible to what was discussed on the linux
PM mailinglist.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 35 insertions, 2 deletions

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 0252582..621ec45 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -920,6 +920,37 @@ pcmcia_device_stringattr(prod_id2, prod_id[1]);
 pcmcia_device_stringattr(prod_id3, prod_id[2]);
 pcmcia_device_stringattr(prod_id4, prod_id[3]);
 
+
+static ssize_t pcmcia_show_pm_state(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+
+	if (p_dev->dev.power.power_state.event != PM_EVENT_ON)
+		return sprintf(buf, "off\n");
+	else
+		return sprintf(buf, "on\n");
+}
+
+static ssize_t pcmcia_store_pm_state(struct device *dev, struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
+	int ret = 0;
+
+        if (!count)
+                return -EINVAL;
+
+	if ((p_dev->dev.power.power_state.event == PM_EVENT_ON) &&
+	    (!strncmp(buf, "off", 3)))
+		ret = dpm_runtime_suspend(dev, PMSG_SUSPEND);
+	else if ((p_dev->dev.power.power_state.event != PM_EVENT_ON) &&
+		 (!strncmp(buf, "on", 2)))
+		dpm_runtime_resume(dev);
+
+	return ret ? ret : count;
+}
+
+
 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
@@ -945,8 +976,9 @@ static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 		struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct pcmcia_device *p_dev = to_pcmcia_dev(dev);
-        if (!count)
-                return -EINVAL;
+
+	if (!count)
+		return -EINVAL;
 
 	down(&p_dev->socket->skt_sem);
 	p_dev->allow_func_id_match = 1;
@@ -959,6 +991,7 @@ static ssize_t pcmcia_store_allow_func_id_match(struct device *dev,
 
 static struct device_attribute pcmcia_dev_attrs[] = {
 	__ATTR(function, 0444, func_show, NULL),
+	__ATTR(pm_state, 0644, pcmcia_show_pm_state, pcmcia_store_pm_state),
 	__ATTR_RO(func_id),
 	__ATTR_RO(manf_id),
 	__ATTR_RO(card_id),