Add runtime PM support, similar to how it's done for wl1271.
This allows to power down the card when the driver is loaded but
network is not in use.
CC: Ohad Ben-Cohen <ohad@xxxxxxxxxx>
Signed-off-by: Grazvydas Ignotas <notasas@xxxxxxxxx>
---
drivers/net/wireless/wl1251/sdio.c | 62 ++++++++++++++++++++++++++++++++++--
1 files changed, 59 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/wl1251/sdio.c b/drivers/net/wireless/wl1251/sdio.c
index 0285190..0a5db21 100644
--- a/drivers/net/wireless/wl1251/sdio.c
+++ b/drivers/net/wireless/wl1251/sdio.c
@@ -26,6 +26,7 @@
#include <linux/platform_device.h>
#include <linux/wl12xx.h>
#include <linux/irq.h>
+#include <linux/pm_runtime.h>
#include "wl1251.h"
@@ -173,10 +174,36 @@ static void wl1251_disable_line_irq(struct wl1251 *wl)
static int wl1251_sdio_set_power(struct wl1251 *wl, bool enable)
{
- if (wl->set_power)
- wl->set_power(enable);
+ struct sdio_func *func = wl_to_func(wl);
+ int ret;
- return 0;
+ if (enable) {
+ /* Power up the card */
+ if (wl->set_power)
+ wl->set_power(true);
+
+ ret = pm_runtime_get_sync(&func->dev);
+ if (ret < 0)
+ goto out;
+
+ sdio_claim_host(func);
+ sdio_enable_func(func);
+ sdio_release_host(func);
+ } else {
+ sdio_claim_host(func);
+ sdio_disable_func(func);
+ sdio_release_host(func);
+
+ ret = pm_runtime_put_sync(&func->dev);
+ if (ret < 0)
+ goto out;
+
+ if (wl->set_power)
+ wl->set_power(false);
+ }
+
+out:
+ return ret;
}
static struct wl1251_if_operations wl1251_sdio_ops = {
@@ -277,6 +304,10 @@ static int wl1251_sdio_probe(struct sdio_func *func,
goto out_free_irq;
sdio_set_drvdata(func, wl);
+
+ /* Tell PM core that we don't need the card to be powered now */
+ pm_runtime_put_noidle(&func->dev);
+
return ret;
out_free_irq:
@@ -298,6 +329,9 @@ static void __devexit wl1251_sdio_remove(struct sdio_func *func)
struct wl1251 *wl = sdio_get_drvdata(func);
struct wl1251_sdio *wl_sdio = wl->if_priv;
+ /* Undo decrement done above in wl1271_probe */
+ pm_runtime_get_noresume(&func->dev);
+
if (wl->irq)
free_irq(wl->irq, wl);
kfree(wl_sdio);
@@ -309,11 +343,33 @@ static void __devexit wl1251_sdio_remove(struct sdio_func *func)
sdio_release_host(func);
}
+static int wl1251_suspend(struct device *dev)
+{
+ /*
+ * Tell MMC/SDIO core it's OK to power down the card
+ * (if it isn't already), but not to remove it completely
+ */
+ return 0;
+}
+
+static int wl1251_resume(struct device *dev)
+{
+ return 0;
+}
+
+static const struct dev_pm_ops wl1251_sdio_pm_ops = {
+ .suspend = wl1251_suspend,
+ .resume = wl1251_resume,
+};
+
static struct sdio_driver wl1251_sdio_driver = {
.name = "wl1251_sdio",
.id_table = wl1251_devices,
.probe = wl1251_sdio_probe,
.remove = __devexit_p(wl1251_sdio_remove),
+ .drv = {
+ .pm = &wl1251_sdio_pm_ops,
+ },
};
static int __init wl1251_sdio_init(void)
--
1.6.3.3
--
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