[PATCH 1/2] serial: a37xx: Use CONFIG_BAUDRATE for initializing early debug UART

Pali Rohár
2021-07-26T12:59:22Z

CONFIG_BAUDRATE should be used for setting the baudrate for the early debug
UART. This replaces current hardcoded 115200 value.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
drivers/serial/serial_mvebu_a3700.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/serial/serial_mvebu_a3700.c b/drivers/serial/serial_mvebu_a3700.c
index c7e66fef8768..52dc3fdad7b4 100644
--- a/drivers/serial/serial_mvebu_a3700.c
+++ b/drivers/serial/serial_mvebu_a3700.c
@@ -309,7 +309,7 @@ U_BOOT_DRIVER(serial_mvebu) = {
static inline void _debug_uart_init(void)
{
void __iomem *base = (void __iomem *)CONFIG_DEBUG_UART_BASE;
- u32 baudrate, parent_rate, divider;
+ u32 parent_rate, divider;

/* reset FIFOs */
writel(UART_CTRL_RXFIFO_RESET | UART_CTRL_TXFIFO_RESET,
@@ -322,9 +322,8 @@ static inline void _debug_uart_init(void)
* Calculate divider
* baudrate = clock / 16 / divider
*/
- baudrate = 115200;
parent_rate = get_ref_clk() * 1000000;
- divider = DIV_ROUND_CLOSEST(parent_rate, baudrate * 16);
+ divider = DIV_ROUND_CLOSEST(parent_rate, CONFIG_BAUDRATE * 16);
writel(divider, base + UART_BAUD_REG);

/*
--
2.20.1