Commit d9dd833c authored by Archie Pusaka's avatar Archie Pusaka Committed by Marcel Holtmann
Browse files

Bluetooth: hci_h5: Add runtime suspend 



This patch allows the controller to suspend after a short period of
inactivity.

Signed-off-by: default avatarArchie Pusaka <apusaka@chromium.org>
Reviewed-by: default avatarAbhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: default avatarHilda Wu <hildawu@realtek.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 30f11dda

drivers/bluetooth/hci_h5.c

+20 −0
Original line number Diff line number Diff line
@@ -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[] = {