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authorArchie Pusaka <apusaka@chromium.org>2021-07-23 14:31:57 +0300
committerMarcel Holtmann <marcel@holtmann.org>2021-07-23 15:10:23 +0300
commitd9dd833cf6d29695682ec7e7924c0d0992b906bc (patch)
tree448423d585fb793495aaf965707a6f8224a1c766 /drivers/bluetooth
parent30f11dda2d25edcaae5ad34c4b953df4b2ba4faf (diff)
downloadlinux-d9dd833cf6d29695682ec7e7924c0d0992b906bc.tar.xz
Bluetooth: hci_h5: Add runtime suspend
This patch allows the controller to suspend after a short period of inactivity. Signed-off-by: Archie Pusaka <apusaka@chromium.org> Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> Reviewed-by: Hilda Wu <hildawu@realtek.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/hci_h5.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index cbc63b057f33..0c0dedece59c 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -12,6 +12,7 @@
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
#include <linux/serdev.h>
#include <linux/skbuff.h>
@@ -21,6 +22,8 @@
#include "btrtl.h"
#include "hci_uart.h"
+#define SUSPEND_TIMEOUT_MS 6000
+
#define HCI_3WIRE_ACK_PKT 0
#define HCI_3WIRE_LINK_PKT 15
@@ -584,6 +587,10 @@ static int h5_recv(struct hci_uart *hu, const void *data, int count)
count -= processed;
}
+ pm_runtime_get(&hu->serdev->dev);
+ pm_runtime_mark_last_busy(&hu->serdev->dev);
+ pm_runtime_put_autosuspend(&hu->serdev->dev);
+
return 0;
}
@@ -620,6 +627,10 @@ static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb)
break;
}
+ pm_runtime_get_sync(&hu->serdev->dev);
+ pm_runtime_mark_last_busy(&hu->serdev->dev);
+ pm_runtime_put_autosuspend(&hu->serdev->dev);
+
return 0;
}
@@ -951,6 +962,12 @@ static void h5_btrtl_open(struct h5 *h5)
serdev_device_set_parity(h5->hu->serdev, SERDEV_PARITY_EVEN);
serdev_device_set_baudrate(h5->hu->serdev, 115200);
+ pm_runtime_set_active(&h5->hu->serdev->dev);
+ pm_runtime_use_autosuspend(&h5->hu->serdev->dev);
+ pm_runtime_set_autosuspend_delay(&h5->hu->serdev->dev,
+ SUSPEND_TIMEOUT_MS);
+ pm_runtime_enable(&h5->hu->serdev->dev);
+
/* The controller needs up to 500ms to wakeup */
gpiod_set_value_cansleep(h5->enable_gpio, 1);
gpiod_set_value_cansleep(h5->device_wake_gpio, 1);
@@ -959,6 +976,8 @@ static void h5_btrtl_open(struct h5 *h5)
static void h5_btrtl_close(struct h5 *h5)
{
+ pm_runtime_disable(&h5->hu->serdev->dev);
+
gpiod_set_value_cansleep(h5->device_wake_gpio, 0);
gpiod_set_value_cansleep(h5->enable_gpio, 0);
}
@@ -1066,6 +1085,7 @@ MODULE_DEVICE_TABLE(acpi, h5_acpi_match);
static const struct dev_pm_ops h5_serdev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(h5_serdev_suspend, h5_serdev_resume)
+ SET_RUNTIME_PM_OPS(h5_serdev_suspend, h5_serdev_resume, NULL)
};
static const struct of_device_id rtl_bluetooth_of_match[] = {