wl1251: add power callback to wl1251_if_operations

Call interface specific power callback before calling board specific
one. Also allow that callback to fail. This is how it's done for
wl1271 and will be used for runtime_pm support.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl1251/main.c

@@ -52,14 +52,14 @@ void wl1251_disable_interrupts(struct wl1251 *wl)
 	wl->if_ops->disable_irq(wl);
 }
 
-static void wl1251_power_off(struct wl1251 *wl)
+static int wl1251_power_off(struct wl1251 *wl)
 {
-	wl->set_power(false);
+	return wl->if_ops->power(wl, false);
 }
 
-static void wl1251_power_on(struct wl1251 *wl)
+static int wl1251_power_on(struct wl1251 *wl)
 {
-	wl->set_power(true);
+	return wl->if_ops->power(wl, true);
 }
 
 static int wl1251_fetch_firmware(struct wl1251 *wl)
@@ -152,9 +152,12 @@ static void wl1251_fw_wakeup(struct wl1251 *wl)
 
 static int wl1251_chip_wakeup(struct wl1251 *wl)
 {
-	int ret = 0;
+	int ret;
+
+	ret = wl1251_power_on(wl);
+	if (ret < 0)
+		return ret;
 
-	wl1251_power_on(wl);
 	msleep(WL1251_POWER_ON_SLEEP);
 	wl->if_ops->reset(wl);
 

drivers/net/wireless/wl1251/sdio.c

@@ -171,8 +171,12 @@ static void wl1251_disable_line_irq(struct wl1251 *wl)
 	return disable_irq(wl->irq);
 }
 
-static void wl1251_sdio_set_power(bool enable)
+static int wl1251_sdio_set_power(struct wl1251 *wl, bool enable)
 {
+	if (wl->set_power)
+		wl->set_power(enable);
+
+	return 0;
 }
 
 static struct wl1251_if_operations wl1251_sdio_ops = {
@@ -181,6 +185,7 @@ static struct wl1251_if_operations wl1251_sdio_ops = {
 	.write_elp = wl1251_sdio_write_elp,
 	.read_elp = wl1251_sdio_read_elp,
 	.reset = wl1251_sdio_reset,
+	.power = wl1251_sdio_set_power,
 };
 
 static int wl1251_platform_probe(struct platform_device *pdev)
@@ -239,7 +244,6 @@ static int wl1251_sdio_probe(struct sdio_func *func,
 	wl_sdio->func = func;
 	wl->if_priv = wl_sdio;
 	wl->if_ops = &wl1251_sdio_ops;
-	wl->set_power = wl1251_sdio_set_power;
 
 	if (wl12xx_board_data != NULL) {
 		wl->set_power = wl12xx_board_data->set_power;

drivers/net/wireless/wl1251/spi.c

@@ -215,12 +215,21 @@ static void wl1251_spi_disable_irq(struct wl1251 *wl)
 	return disable_irq(wl->irq);
 }
 
+static int wl1251_spi_set_power(struct wl1251 *wl, bool enable)
+{
+	if (wl->set_power)
+		wl->set_power(enable);
+
+	return 0;
+}
+
 static const struct wl1251_if_operations wl1251_spi_ops = {
 	.read = wl1251_spi_read,
 	.write = wl1251_spi_write,
 	.reset = wl1251_spi_reset_wake,
 	.enable_irq = wl1251_spi_enable_irq,
 	.disable_irq = wl1251_spi_disable_irq,
+	.power = wl1251_spi_set_power,
 };
 
 static int __devinit wl1251_spi_probe(struct spi_device *spi)

drivers/net/wireless/wl1251/wl1251.h

@@ -256,6 +256,7 @@ struct wl1251_if_operations {
 	void (*write)(struct wl1251 *wl, int addr, void *buf, size_t len);
 	void (*read_elp)(struct wl1251 *wl, int addr, u32 *val);
 	void (*write_elp)(struct wl1251 *wl, int addr, u32 val);
+	int  (*power)(struct wl1251 *wl, bool enable);
 	void (*reset)(struct wl1251 *wl);
 	void (*enable_irq)(struct wl1251 *wl);
 	void (*disable_irq)(struct wl1251 *wl);