Enable runtime pm for the wl1271 SDIO device.
We request power whenever the WLAN interface is brought up,
and release it after the WLAN interface is taken down.
As a result, power is released immediately after probe returns,
since at that point power has not been explicitly requested yet
(i.e. the WLAN interface is still down).
Signed-off-by: Ohad Ben-Cohen <ohad@xxxxxxxxxx>
---
drivers/net/wireless/wl12xx/wl1271_sdio.c | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/wl12xx/wl1271_sdio.c b/drivers/net/wireless/wl12xx/wl1271_sdio.c
index 824b9e8..235191e 100644
--- a/drivers/net/wireless/wl12xx/wl1271_sdio.c
+++ b/drivers/net/wireless/wl12xx/wl1271_sdio.c
@@ -30,6 +30,7 @@
#include <linux/mmc/card.h>
#include <linux/gpio.h>
#include <linux/wl12xx.h>
+#include <linux/pm_runtime.h>
#include "wl1271.h"
#include "wl12xx_80211.h"
@@ -153,20 +154,27 @@ static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
{
struct sdio_func *func = wl_to_func(wl);
+ int err;
/* Let the SDIO stack handle wlan_enable control, so we
* keep host claimed while wlan is in use to keep wl1271
* alive.
*/
if (enable) {
+ err = pm_runtime_get_sync(&func->dev);
+ if (err)
+ goto out;
+
sdio_claim_host(func);
sdio_enable_func(func);
} else {
sdio_disable_func(func);
sdio_release_host(func);
+ err = pm_runtime_put_sync(&func->dev);
}
- return 0;
+out:
+ return err;
}
static struct wl1271_if_operations sdio_ops = {
@@ -233,6 +241,8 @@ static int __devinit wl1271_probe(struct sdio_func *func,
sdio_set_drvdata(func, wl);
+ pm_runtime_put_noidle(&func->dev);
+
wl1271_notice("initialized");
return 0;
@@ -255,6 +265,8 @@ static void __devexit wl1271_remove(struct sdio_func *func)
wl1271_unregister_hw(wl);
wl1271_free_hw(wl);
+
+ pm_runtime_get_noresume(&func->dev);
}
static struct sdio_driver wl1271_sdio_driver = {
--
1.7.0.4
--
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