diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0879-Bluetooth-hci_bcm-Disallow-set_baudrate-for-BCM4354.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0879-Bluetooth-hci_bcm-Disallow-set_baudrate-for-BCM4354.patch | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0879-Bluetooth-hci_bcm-Disallow-set_baudrate-for-BCM4354.patch b/target/linux/bcm27xx/patches-5.4/950-0879-Bluetooth-hci_bcm-Disallow-set_baudrate-for-BCM4354.patch new file mode 100644 index 0000000000..da8f37b3dd --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0879-Bluetooth-hci_bcm-Disallow-set_baudrate-for-BCM4354.patch @@ -0,0 +1,115 @@ +From 4c40c6ae0510be0fc9626d1717ff4163358cbfb2 Mon Sep 17 00:00:00 2001 +From: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> +Date: Tue, 26 Nov 2019 08:17:29 +0100 +Subject: [PATCH] Bluetooth: hci_bcm: Disallow set_baudrate for + BCM4354 + +commit 5d6f391073d5c1c903ac12be72c66b96b2ae93f4 upstream. + +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> +--- + drivers/bluetooth/hci_bcm.c | 31 +++++++++++++++++++++++++++++-- + 1 file changed, 29 insertions(+), 2 deletions(-) + +--- 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. */ +@@ -113,6 +122,7 @@ struct bcm_device { + struct hci_uart *hu; + bool is_suspended; + #endif ++ bool no_early_set_baudrate; + }; + + /* generic bcm uart resources */ +@@ -450,7 +460,13 @@ 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) +@@ -568,6 +584,8 @@ 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 +@@ -1377,6 +1395,7 @@ 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); +@@ -1411,6 +1430,10 @@ static int bcm_serdev_probe(struct serde + 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); + } + +@@ -1422,12 +1445,16 @@ static void bcm_serdev_remove(struct ser + } + + #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" }, + { }, + }; |