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drivers: serial: rpi_pico: check if baudrate was set by the API function

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if peripheral clock is not configured, uart init API function returns 0,
so we need to check the return value of this function

Signed-off-by: Andrei-Edward Popa <andrei_edward.popa@upb.ro>
This commit is contained in:
Andrei-Edward Popa 2022-02-03 14:44:41 +02:00 • committed by Anas Nashif
commit 2fc2928fa5
1 changed files with 9 additions and 2 deletions
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11
drivers/serial/uart_rpi_pico.c
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@ -40,14 +40,21 @@ static void uart_rpi_poll_out(const struct device *dev, unsigned char c)
static int uart_rpi_init(const struct device *dev)
{
const struct uart_rpi_config *config = dev->config;
int ret;
uart_inst_t * const uart_inst = config->uart_dev;
uart_hw_t * const uart_hw = config->uart_regs;
struct uart_rpi_data * const data = dev->data;
int ret, baudrate;
ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);
if (ret < 0) {
return ret;
}
uart_init(config->uart_dev, config->baudrate);
baudrate = uart_init(uart_inst, data->baudrate);
/* Check if baudrate adjustment returned by 'uart_init' function is a positive value */
if (baudrate <= 0) {
return -EINVAL;
}
return 0;
}