[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@xxxxxxxxxxxxxxxxxxxx>
---
drivers/pcmcia/ds.c | 37 +++++++++++++++++++++++++++++++++++--
drivers/pcmcia/socket_sysfs.c | 25 +++++++++++++++++++++++++
2 files changed, 60 insertions(+), 2 deletions(-)
88605b085b020bfcf08313331f50e754b46866d9
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_
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_i
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_i
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 7a77446..5ab1cde 100644
--- a/drivers/pcmcia/socket_sysfs.c
+++ b/drivers/pcmcia/socket_sysfs.c
@@ -98,6 +98,30 @@ static ssize_t pccard_store_insert(struc
}
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 *pc
&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,
--
1.0.GIT
