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bsp: cvitek: fix cvitek uart driver can not repeat configure 

After first called from uart open, the dw8250_uart_configure
API cannot be called again. Otherwise, this will mess up the
device, and uart will not act properly to interrupt again.

Analysis: Configure uart device will close recive interrupte,
causing uart device to malfunction.

Solution: After configure uart device, enable the device's
recive interrupte.

Signed-off-by: Shicheng Chu <1468559561@qq.com>
Reviewed-by: Chen Wang <unicorn_wang@outlook.com>
This commit is contained in:
Z8MAN8 2024-08-23 22:23:42 +08:00 committed by Meco Man
parent 3174fcd77b
commit cea7670e7f
1 changed files with 4 additions and 0 deletions
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4
bsp/cvitek/drivers/drv_uart.c
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@ -115,6 +115,7 @@ static rt_err_t dw8250_uart_configure(struct rt_serial_device *serial, struct se
rt_base_t base;
struct hw_uart_device *uart;
int clock_divisor;
int last_ier_state;
RT_ASSERT(serial != RT_NULL);
uart = (struct hw_uart_device *)serial->parent.user_data;
@ -122,6 +123,7 @@ static rt_err_t dw8250_uart_configure(struct rt_serial_device *serial, struct se
while (!(dw8250_read32(base, UART_LSR) & UART_LSR_TEMT));
last_ier_state = dw8250_read32(base, UART_IER);
dw8250_write32(base, UART_IER, 0);
dw8250_write32(base, UART_MCR, UART_MCRVAL);
dw8250_write32(base, UART_FCR, UART_FCR_DEFVAL);
@ -132,6 +134,8 @@ static rt_err_t dw8250_uart_configure(struct rt_serial_device *serial, struct se
clock_divisor = DIV_ROUND_CLOSEST(UART_INPUT_CLK, 16 * serial->config.baud_rate);
dw8250_uart_setbrg(base, clock_divisor);
dw8250_write32(base, UART_IER, last_ier_state);
return RT_EOK;
}