diff options
Diffstat (limited to 'drivers/serial/serial_stm32x7.c')
| -rw-r--r-- | drivers/serial/serial_stm32x7.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/serial/serial_stm32x7.c b/drivers/serial/serial_stm32x7.c index 05c73da230..bf118a78cf 100644 --- a/drivers/serial/serial_stm32x7.c +++ b/drivers/serial/serial_stm32x7.c @@ -19,16 +19,9 @@ static int stm32_serial_setbrg(struct udevice *dev, int baudrate) { struct stm32x7_serial_platdata *plat = dev->platdata; struct stm32_usart *const usart = plat->base; - u32 clock, int_div, mantissa, fraction, oversampling; + u32 int_div, mantissa, fraction, oversampling; - if (((u32)usart & STM32_BUS_MASK) == APB1_PERIPH_BASE) - clock = clock_get(CLOCK_APB1); - else if (((u32)usart & STM32_BUS_MASK) == APB2_PERIPH_BASE) - clock = clock_get(CLOCK_APB2); - else - return -EINVAL; - - int_div = DIV_ROUND_CLOSEST(clock, baudrate); + int_div = DIV_ROUND_CLOSEST(plat->clock_rate, baudrate); if (int_div < 16) { oversampling = 8; @@ -101,6 +94,12 @@ static int stm32_serial_probe(struct udevice *dev) } #endif + plat->clock_rate = clk_get_rate(&clk); + if (plat->clock_rate < 0) { + clk_disable(&clk); + return plat->clock_rate; + }; + /* Disable usart-> disable overrun-> enable usart */ clrbits_le32(&usart->cr1, USART_CR1_RE | USART_CR1_TE | USART_CR1_UE); setbits_le32(&usart->cr3, USART_CR3_OVRDIS); |