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charset="utf-8" This adds support for driving the chip into sleep or wakeup with a GPIO. If the device tree property h2c-ps-gpio is defined, the driver utilizes this GPIO for controlling the chip's power save state, else it uses the default UART-break method. Signed-off-by: Neeraj Sanjay Kale --- drivers/bluetooth/btnxpuart.c | 36 +++++++++++++++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c index 2b8a07c745c9..327c86a0329c 100644 --- a/drivers/bluetooth/btnxpuart.c +++ b/drivers/bluetooth/btnxpuart.c @@ -16,6 +16,7 @@ #include #include #include +#include =20 #include #include @@ -82,6 +83,7 @@ #define WAKEUP_METHOD_BREAK 1 #define WAKEUP_METHOD_EXT_BREAK 2 #define WAKEUP_METHOD_RTS 3 +#define WAKEUP_METHOD_GPIO 4 #define WAKEUP_METHOD_INVALID 0xff =20 /* power save mode status */ @@ -135,6 +137,7 @@ struct ps_data { bool driver_sent_cmd; u16 h2c_ps_interval; u16 c2h_ps_interval; + struct gpio_desc *h2c_ps_gpio; struct hci_dev *hdev; struct work_struct work; struct timer_list ps_timer; @@ -365,7 +368,7 @@ static void ps_control(struct hci_dev *hdev, u8 ps_stat= e) { struct btnxpuart_dev *nxpdev =3D hci_get_drvdata(hdev); struct ps_data *psdata =3D &nxpdev->psdata; - int status; + int status =3D 0; =20 if (psdata->ps_state =3D=3D ps_state || !test_bit(BTNXPUART_SERDEV_OPEN, &nxpdev->tx_state)) @@ -373,6 +376,12 @@ static void ps_control(struct hci_dev *hdev, u8 ps_sta= te) =20 mutex_lock(&psdata->ps_lock); switch (psdata->cur_h2c_wakeupmode) { + case WAKEUP_METHOD_GPIO: + if (ps_state =3D=3D PS_STATE_AWAKE) + gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 0); + else + gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 1); + break; case WAKEUP_METHOD_DTR: if (ps_state =3D=3D PS_STATE_AWAKE) status =3D serdev_device_set_tiocm(nxpdev->serdev, TIOCM_DTR, 0); @@ -425,8 +434,13 @@ static void ps_timeout_func(struct timer_list *t) static void ps_setup(struct hci_dev *hdev) { struct btnxpuart_dev *nxpdev =3D hci_get_drvdata(hdev); + struct serdev_device *serdev =3D nxpdev->serdev; struct ps_data *psdata =3D &nxpdev->psdata; =20 + psdata->h2c_ps_gpio =3D devm_gpiod_get(&serdev->dev, "h2c-ps", GPIOD_OUT_= LOW); + if (IS_ERR(psdata->h2c_ps_gpio)) + psdata->h2c_wakeup_gpio =3D 0xff; + psdata->hdev =3D hdev; INIT_WORK(&psdata->work, ps_work_func); mutex_init(&psdata->ps_lock); @@ -516,6 +530,9 @@ static int send_wakeup_method_cmd(struct hci_dev *hdev,= void *data) pcmd.c2h_wakeupmode =3D psdata->c2h_wakeupmode; pcmd.c2h_wakeup_gpio =3D psdata->c2h_wakeup_gpio; switch (psdata->h2c_wakeupmode) { + case WAKEUP_METHOD_GPIO: + pcmd.h2c_wakeupmode =3D BT_CTRL_WAKEUP_METHOD_GPIO; + break; case WAKEUP_METHOD_DTR: pcmd.h2c_wakeupmode =3D BT_CTRL_WAKEUP_METHOD_DSR; break; @@ -550,6 +567,7 @@ static void ps_init(struct hci_dev *hdev) { struct btnxpuart_dev *nxpdev =3D hci_get_drvdata(hdev); struct ps_data *psdata =3D &nxpdev->psdata; + u8 default_h2c_wakeup_mode =3D DEFAULT_H2C_WAKEUP_MODE; =20 serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_RTS); usleep_range(5000, 10000); @@ -561,8 +579,19 @@ static void ps_init(struct hci_dev *hdev) psdata->c2h_wakeup_gpio =3D 0xff; =20 psdata->cur_h2c_wakeupmode =3D WAKEUP_METHOD_INVALID; + if (!IS_ERR(psdata->h2c_ps_gpio)) + default_h2c_wakeup_mode =3D WAKEUP_METHOD_GPIO; + psdata->h2c_ps_interval =3D PS_DEFAULT_TIMEOUT_PERIOD_MS; - switch (DEFAULT_H2C_WAKEUP_MODE) { + + switch (default_h2c_wakeup_mode) { + case WAKEUP_METHOD_GPIO: + psdata->h2c_wakeupmode =3D WAKEUP_METHOD_GPIO; + gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 1); + usleep_range(5000, 10000); + gpiod_set_value_cansleep(psdata->h2c_ps_gpio, 0); + usleep_range(5000, 10000); + break; case WAKEUP_METHOD_DTR: psdata->h2c_wakeupmode =3D WAKEUP_METHOD_DTR; serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_DTR); @@ -1279,6 +1308,9 @@ static int nxp_enqueue(struct hci_dev *hdev, struct s= k_buff *skb) psdata->c2h_wakeup_gpio =3D wakeup_parm.c2h_wakeup_gpio; psdata->h2c_wakeup_gpio =3D wakeup_parm.h2c_wakeup_gpio; switch (wakeup_parm.h2c_wakeupmode) { + case BT_CTRL_WAKEUP_METHOD_GPIO: + psdata->h2c_wakeupmode =3D WAKEUP_METHOD_GPIO; + break; case BT_CTRL_WAKEUP_METHOD_DSR: psdata->h2c_wakeupmode =3D WAKEUP_METHOD_DTR; break; --=20 2.25.1