serial: stm32x7: add clk_get_rate() support
Replace proprietary clock_get() by clk_get_rate()
The stm32x7 serial driver is now "generic" and can be used
by other STM32 SoCs.
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Vikas MANOCHA <vikas.manocha@st.com>
diff --git a/drivers/serial/serial_stm32x7.c b/drivers/serial/serial_stm32x7.c
index 05c73da..bf118a7 100644
--- a/drivers/serial/serial_stm32x7.c
+++ b/drivers/serial/serial_stm32x7.c
@@ -19,16 +19,9 @@
{
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 @@
}
#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);