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Bluetooth: hci_h5: Add runtime suspend

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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>
This commit is contained in:
Archie Pusaka 2021-07-23 19:31:57 +08:00 committed by Marcel Holtmann
parent 30f11dda2d
commit d9dd833cf6
1 changed files with 20 additions and 0 deletions
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20
drivers/bluetooth/hci_h5.c
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@ -12,6 +12,7 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/mod_devicetable.h> #include <linux/mod_devicetable.h>
#include <linux/of_device.h> #include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/serdev.h> #include <linux/serdev.h>
#include <linux/skbuff.h> #include <linux/skbuff.h>
@ -21,6 +22,8 @@
#include "btrtl.h" #include "btrtl.h"
#include "hci_uart.h" #include "hci_uart.h"
#define SUSPEND_TIMEOUT_MS 6000
#define HCI_3WIRE_ACK_PKT 0 #define HCI_3WIRE_ACK_PKT 0
#define HCI_3WIRE_LINK_PKT 15 #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; 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; return 0;
} }
@ -620,6 +627,10 @@ static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb)
break; 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; 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_parity(h5->hu->serdev, SERDEV_PARITY_EVEN);
serdev_device_set_baudrate(h5->hu->serdev, 115200); 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 */ /* The controller needs up to 500ms to wakeup */
gpiod_set_value_cansleep(h5->enable_gpio, 1); gpiod_set_value_cansleep(h5->enable_gpio, 1);
gpiod_set_value_cansleep(h5->device_wake_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) 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->device_wake_gpio, 0);
gpiod_set_value_cansleep(h5->enable_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 = { static const struct dev_pm_ops h5_serdev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(h5_serdev_suspend, h5_serdev_resume) 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[] = { static const struct of_device_id rtl_bluetooth_of_match[] = {