diff options
Diffstat (limited to 'drivers/usb/serial/f81534.c')
| -rw-r--r-- | drivers/usb/serial/f81534.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/usb/serial/f81534.c b/drivers/usb/serial/f81534.c index 86edec3e8c05..4dfbff20bda4 100644 --- a/drivers/usb/serial/f81534.c +++ b/drivers/usb/serial/f81534.c @@ -131,6 +131,7 @@ #define F81534_CLK_24_MHZ BIT(2) #define F81534_CLK_14_77_MHZ (BIT(1) | BIT(2)) #define F81534_CLK_MASK GENMASK(2, 1) +#define F81534_CLK_TX_DELAY_1BIT BIT(3) #define F81534_CLK_RS485_MODE BIT(4) #define F81534_CLK_RS485_INVERT BIT(5) @@ -1386,7 +1387,11 @@ static int f81534_port_probe(struct usb_serial_port *port) if (!port_priv) return -ENOMEM; - port_priv->shadow_clk = F81534_UART_EN; + /* + * We'll make tx frame error when baud rate from 384~500kps. So we'll + * delay all tx data frame with 1bit. + */ + port_priv->shadow_clk = F81534_UART_EN | F81534_CLK_TX_DELAY_1BIT; spin_lock_init(&port_priv->msr_lock); mutex_init(&port_priv->mcr_mutex); mutex_init(&port_priv->lcr_mutex); |