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wl1271: sdio: enable runtime PM

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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@wizery.com>
Acked-by: Luciano Coelho <luciano.coelho@nokia.com>
Tested-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
This commit is contained in:
Ohad Ben-Cohen 2010-10-08 16:16:16 +03:00 committed by Luciano Coelho
parent 15a6321d1c
commit 00cbb3c531
1 changed files with 17 additions and 6 deletions
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23
drivers/net/wireless/wl12xx/wl1271_sdio.c
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@ -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"
@ -160,12 +161,19 @@ static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
static int wl1271_sdio_power_on(struct wl1271 *wl)
{
struct sdio_func *func = wl_to_func(wl);
int ret;
/* Power up the card */
ret = pm_runtime_get_sync(&func->dev);
if (ret < 0)
goto out;
sdio_claim_host(func);
sdio_enable_func(func);
sdio_release_host(func);
return 0;
out:
return ret;
}
static int wl1271_sdio_power_off(struct wl1271 *wl)
@ -176,15 +184,12 @@ static int wl1271_sdio_power_off(struct wl1271 *wl)
sdio_disable_func(func);
sdio_release_host(func);
return 0;
/* Power down the card */
return pm_runtime_put_sync(&func->dev);
}
static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
{
/* Let the SDIO stack handle wlan_enable control, so we
* keep host claimed while wlan is in use to keep wl1271
* alive.
*/
if (enable)
return wl1271_sdio_power_on(wl);
else
@ -256,6 +261,9 @@ static int __devinit wl1271_probe(struct sdio_func *func,
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);
wl1271_notice("initialized");
return 0;
@ -274,6 +282,9 @@ static void __devexit wl1271_remove(struct sdio_func *func)
{
struct wl1271 *wl = sdio_get_drvdata(func);
/* Undo decrement done above in wl1271_probe */
pm_runtime_get_noresume(&func->dev);
wl1271_unregister_hw(wl);
free_irq(wl->irq, wl);
wl1271_free_hw(wl);