diff options
author | Abhishek Pandit-Subedi <abhishekpandit@chromium.org> | 2019-11-26 10:17:29 +0300 |
---|---|---|
committer | Johan Hedberg <johan.hedberg@intel.com> | 2019-11-27 10:09:49 +0300 |
commit | 5d6f391073d5c1c903ac12be72c66b96b2ae93f4 (patch) | |
tree | 544b2ccb59451acf4fa1b347bee3b49e1b63e754 /drivers/bluetooth | |
parent | 34682110abc50ffea7e002b0c2fd7ea9e0000ccc (diff) | |
download | linux-5d6f391073d5c1c903ac12be72c66b96b2ae93f4.tar.xz |
Bluetooth: hci_bcm: Disallow set_baudrate for BCM4354
Without updating the patchram, the BCM4354 does not support a higher
operating speed. The normal bcm_setup follows the correct order
(init_speed, patchram and then oper_speed) but the serdev driver will
set the operating speed before calling the hu->setup function. Thus,
for the BCM4354, don't set the operating speed before patchram.
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r-- | drivers/bluetooth/hci_bcm.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index d2a6a4afdbbb..0200eff12bc9 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -48,6 +48,14 @@ #define BCM_NUM_SUPPLIES 2 /** + * struct bcm_device_data - device specific data + * @no_early_set_baudrate: Disallow set baudrate before driver setup() + */ +struct bcm_device_data { + bool no_early_set_baudrate; +}; + +/** * struct bcm_device - device driver resources * @serdev_hu: HCI UART controller struct * @list: bcm_device_list node @@ -79,6 +87,7 @@ * @hu: pointer to HCI UART controller struct, * used to disable flow control during runtime suspend and system sleep * @is_suspended: whether flow control is currently disabled + * @no_early_set_baudrate: don't set_baudrate before setup() */ struct bcm_device { /* Must be the first member, hci_serdev.c expects this. */ @@ -112,6 +121,7 @@ struct bcm_device { struct hci_uart *hu; bool is_suspended; #endif + bool no_early_set_baudrate; }; /* generic bcm uart resources */ @@ -447,7 +457,13 @@ out: if (bcm->dev) { hci_uart_set_flow_control(hu, true); hu->init_speed = bcm->dev->init_speed; - hu->oper_speed = bcm->dev->oper_speed; + + /* If oper_speed is set, ldisc/serdev will set the baudrate + * before calling setup() + */ + if (!bcm->dev->no_early_set_baudrate) + hu->oper_speed = bcm->dev->oper_speed; + err = bcm_gpio_set_power(bcm->dev, true); hci_uart_set_flow_control(hu, false); if (err) @@ -565,6 +581,8 @@ static int bcm_setup(struct hci_uart *hu) /* Operational speed if any */ if (hu->oper_speed) speed = hu->oper_speed; + else if (bcm->dev && bcm->dev->oper_speed) + speed = bcm->dev->oper_speed; else if (hu->proto->oper_speed) speed = hu->proto->oper_speed; else @@ -1374,6 +1392,7 @@ static struct platform_driver bcm_driver = { static int bcm_serdev_probe(struct serdev_device *serdev) { struct bcm_device *bcmdev; + const struct bcm_device_data *data; int err; bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); @@ -1408,6 +1427,10 @@ static int bcm_serdev_probe(struct serdev_device *serdev) if (err) dev_err(&serdev->dev, "Failed to power down\n"); + data = device_get_match_data(bcmdev->dev); + if (data) + bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; + return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); } @@ -1419,12 +1442,16 @@ static void bcm_serdev_remove(struct serdev_device *serdev) } #ifdef CONFIG_OF +static struct bcm_device_data bcm4354_device_data = { + .no_early_set_baudrate = true, +}; + static const struct of_device_id bcm_bluetooth_of_match[] = { { .compatible = "brcm,bcm20702a1" }, { .compatible = "brcm,bcm4345c5" }, { .compatible = "brcm,bcm4330-bt" }, { .compatible = "brcm,bcm43438-bt" }, - { .compatible = "brcm,bcm43540-bt" }, + { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, { .compatible = "brcm,bcm4335a0" }, { }, }; |