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| author | Philipp Hug <philipp@hug.cx> | 2018-07-11 13:31:34 +0200 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2018-09-14 10:41:49 +0000 |
| commit | df5e6f64b6dd465cb6253159dc3c7335e763dbde (patch) | |
| tree | 5ddc4dbb2a243ac3d403d13f5af60ba8df866e36 /src/soc/sifive | |
| parent | 91595724e7f302e0a876f0507e307f37f5871a7d (diff) | |
| download | coreboot-df5e6f64b6dd465cb6253159dc3c7335e763dbde.tar.gz coreboot-df5e6f64b6dd465cb6253159dc3c7335e763dbde.tar.bz2 coreboot-df5e6f64b6dd465cb6253159dc3c7335e763dbde.zip | |
soc/sifive/fu540: Implement uart_platform_refclk for UART divisor calculation
After changing clock from 33.33Mhz to 1Ghz the UART divisor needs to be
recalculated. Return correct tlck frequency in uart_platform_refclk.
Change-Id: I2291e4198cf466a8334211c6c46bc3268fc979a9
Signed-off-by: Philipp Hug <philipp@hug.cx>
Reviewed-on: https://review.coreboot.org/28584
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Diffstat (limited to 'src/soc/sifive')
| -rw-r--r-- | src/soc/sifive/fu540/uart.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/soc/sifive/fu540/uart.c b/src/soc/sifive/fu540/uart.c index c53f42d9d885..b563be13b1a0 100644 --- a/src/soc/sifive/fu540/uart.c +++ b/src/soc/sifive/fu540/uart.c @@ -13,8 +13,11 @@ * GNU General Public License for more details. */ +#include <stddef.h> +#include <stdint.h> #include <console/uart.h> #include <soc/addressmap.h> +#include <soc/clock.h> uintptr_t uart_platform_base(int idx) { @@ -29,5 +32,9 @@ unsigned int uart_platform_refclk(void) /* * The SiFive UART uses tlclk, which is coreclk/2 as input */ - return 33330000 / 2; + + if (ENV_BOOTBLOCK) + return 33330000 / 2; + else + return clock_get_coreclk_khz() * KHz / 2; } |