[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>

2 files changed, 60 insertions, 2 deletions

diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 0252582b91cd..621ec459d27a 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),
diff --git a/drivers/pcmcia/socket_sysfs.c b/drivers/pcmcia/socket_sysfs.c
index 7a7744662d54..5ab1cdef7c48 100644
--- a/drivers/pcmcia/socket_sysfs.c
+++ b/drivers/pcmcia/socket_sysfs.c
@@ -98,6 +98,30 @@ static ssize_t pccard_store_insert(struct class_device *dev, const char *buf, si
 }
 static CLASS_DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
 
+
+static ssize_t pccard_show_card_pm_state(struct class_device *dev, char *buf)
+{
+        struct pcmcia_socket *s = to_socket(dev);
+        return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
+}
+
+static ssize_t pccard_store_card_pm_state(struct class_device *dev, const char *buf, size_t count)
+{
+        ssize_t ret = -EINVAL;
+        struct pcmcia_socket *s = to_socket(dev);
+
+        if (!count)
+                return -EINVAL;
+
+        if (!(s->state & SOCKET_SUSPEND) && !strncmp(buf, "off", 3))
+                ret = pcmcia_suspend_card(s);
+        else if ((s->state & SOCKET_SUSPEND) && !strncmp(buf, "on", 2))
+                ret = pcmcia_resume_card(s);
+
+        return ret ? -ENODEV : count;
+}
+static CLASS_DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
+
 static ssize_t pccard_store_eject(struct class_device *dev, const char *buf, size_t count)
 {
         ssize_t ret;
@@ -320,6 +344,7 @@ static struct class_device_attribute *pccard_socket_attributes[] = {
         &class_device_attr_card_vpp,
         &class_device_attr_card_vcc,
         &class_device_attr_card_insert,
+        &class_device_attr_card_pm_state,
         &class_device_attr_card_eject,
         &class_device_attr_card_irq_mask,
         &class_device_attr_available_resources_setup_done,