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From b2e19dbff471eb6b9b39ff8f21c8d38e4fac8fe6 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <wahrenst@gmx.net>
Date: Wed, 1 Jan 2020 15:01:34 +0100
Subject: [PATCH] Bluetooth: hci_bcm: Drive RTS only for BCM43438
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
commit e601daed271e9eb1b923972a0a1af65f8c7bb77b upstream.
The commit 3347a80965b3 ("Bluetooth: hci_bcm: Fix RTS handling during
startup") is causing at least a regression for AP6256 on Orange Pi 3.
So do the RTS line handing during startup only on the necessary platform.
Fixes: 3347a80965b3 ("Bluetooth: hci_bcm: Fix RTS handling during startup")
Reported-by: Ondřej Jirman <megous@megous.com>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
---
drivers/bluetooth/hci_bcm.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
--- a/drivers/bluetooth/hci_bcm.c
+++ b/drivers/bluetooth/hci_bcm.c
@@ -53,6 +53,7 @@
*/
struct bcm_device_data {
bool no_early_set_baudrate;
+ bool drive_rts_on_open;
};
/**
@@ -123,6 +124,7 @@ struct bcm_device {
bool is_suspended;
#endif
bool no_early_set_baudrate;
+ bool drive_rts_on_open;
u8 pcm_int_params[5];
};
@@ -459,7 +461,9 @@ static int bcm_open(struct hci_uart *hu)
out:
if (bcm->dev) {
- hci_uart_set_flow_control(hu, true);
+ if (bcm->dev->drive_rts_on_open)
+ hci_uart_set_flow_control(hu, true);
+
hu->init_speed = bcm->dev->init_speed;
/* If oper_speed is set, ldisc/serdev will set the baudrate
@@ -469,7 +473,10 @@ out:
hu->oper_speed = bcm->dev->oper_speed;
err = bcm_gpio_set_power(bcm->dev, true);
- hci_uart_set_flow_control(hu, false);
+
+ if (bcm->dev->drive_rts_on_open)
+ hci_uart_set_flow_control(hu, false);
+
if (err)
goto err_unset_hu;
}
@@ -1455,8 +1462,10 @@ static int bcm_serdev_probe(struct serde
dev_err(&serdev->dev, "Failed to power down\n");
data = device_get_match_data(bcmdev->dev);
- if (data)
+ if (data) {
bcmdev->no_early_set_baudrate = data->no_early_set_baudrate;
+ bcmdev->drive_rts_on_open = data->drive_rts_on_open;
+ }
return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
}
@@ -1473,11 +1482,15 @@ static struct bcm_device_data bcm4354_de
.no_early_set_baudrate = true,
};
+static struct bcm_device_data bcm43438_device_data = {
+ .drive_rts_on_open = 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,bcm43438-bt", .data = &bcm43438_device_data },
{ .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data },
{ .compatible = "brcm,bcm4335a0" },
{ },
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