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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-02-19 08:58:12 +0200 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-03-04 15:24:32 +0100 |
| commit | 65ba20e17bd91e4b92e34b495f64a51a0313f6a9 (patch) | |
| tree | 4365d0fcd3548c03d5895df7b4114e77c6d5d1dd /src/cpu/allwinner/a10/uart.c | |
| parent | c5332e30da4c314c1d44d6d3f9df6d2ae6417e0f (diff) | |
allwinner/a10: Fix baudrate calculation
UART input clock is platform dependent. Also account for possible
use of get_option() where baudrate is not compile-time constant.
Change-Id: Ie1c8789ef72430e43fc33bfa9ffb9f5346762439
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5289
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/cpu/allwinner/a10/uart.c')
| -rw-r--r-- | src/cpu/allwinner/a10/uart.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/cpu/allwinner/a10/uart.c b/src/cpu/allwinner/a10/uart.c index 97ac302ddc..990026be26 100644 --- a/src/cpu/allwinner/a10/uart.c +++ b/src/cpu/allwinner/a10/uart.c @@ -7,6 +7,7 @@ #include "uart.h" #include <arch/io.h> +#include <uart.h> #include <uart8250.h> /** @@ -19,11 +20,11 @@ void a10_uart_configure(void *uart_base, u32 baud_rate, u8 data_bits, u16 div; struct a10_uart *uart = uart_base; + div = (u16) uart_baudrate_divisor(baud_rate, + uart_platform_refclk(), 16); /* Enable access to Divisor Latch register */ write32(UART_LCR_DLAB, &uart->lcr); /* Set baudrate */ - /* FIXME: We assume clock is 24MHz, which may not be the case */ - div = 24000000 / 16 / baud_rate; write32((div >> 8) & 0xff, &uart->dlh); write32(div & 0xff, &uart->dll); /* Set line control */ |