When the host is asleep, the device has wake up the host using the
usual SPI IRQ.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx>
---
drivers/net/wireless/silabs/wfx/bus_spi.c | 31 ++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/silabs/wfx/bus_spi.c b/drivers/net/wireless/silabs/wfx/bus_spi.c
index 46278dce7ffc..1d6bf3525f4e 100644
--- a/drivers/net/wireless/silabs/wfx/bus_spi.c
+++ b/drivers/net/wireless/silabs/wfx/bus_spi.c
@@ -13,6 +13,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/of.h>
+#include <linux/pm.h>
#include "bus.h"
#include "wfx.h"
@@ -189,6 +190,26 @@ static const struct wfx_hwbus_ops wfx_spi_hwbus_ops = {
.align_size = wfx_spi_align_size,
};
+static int wfx_spi_suspend(struct device *dev)
+{
+ struct spi_device *func = to_spi_device(dev);
+ struct wfx_spi_priv *bus = spi_get_drvdata(func);
+
+ if (!device_may_wakeup(dev))
+ return 0;
+ flush_work(&bus->core->hif.bh);
+ return enable_irq_wake(func->irq);
+}
+
+static int wfx_spi_resume(struct device *dev)
+{
+ struct spi_device *func = to_spi_device(dev);
+
+ if (!device_may_wakeup(dev))
+ return 0;
+ return disable_irq_wake(func->irq);
+}
+
static int wfx_spi_probe(struct spi_device *func)
{
struct wfx_platform_data *pdata;
@@ -239,7 +260,12 @@ static int wfx_spi_probe(struct spi_device *func)
if (!bus->core)
return -EIO;
- return wfx_probe(bus->core);
+ ret = wfx_probe(bus->core);
+ if (ret)
+ return ret;
+
+ device_set_wakeup_capable(&func->dev, true);
+ return 0;
}
static void wfx_spi_remove(struct spi_device *func)
@@ -273,6 +299,8 @@ static const struct of_device_id wfx_spi_of_match[] = {
MODULE_DEVICE_TABLE(of, wfx_spi_of_match);
#endif
+DEFINE_SIMPLE_DEV_PM_OPS(wfx_spi_pm_ops, wfx_spi_suspend, wfx_spi_resume);
+
struct spi_driver wfx_spi_driver = {
.id_table = wfx_spi_id,
.probe = wfx_spi_probe,
@@ -280,5 +308,6 @@ struct spi_driver wfx_spi_driver = {
.driver = {
.name = "wfx-spi",
.of_match_table = of_match_ptr(wfx_spi_of_match),
+ .pm = &wfx_spi_pm_ops,
},
};
--
2.39.5
