[coreboot-gerrit] Change in coreboot[master]: soc/sifive/fu540: Implement uart_platform_refclk for UART divisor cal...

[Philipp Hug (Code Review)]

Philipp Hug has uploaded this change for review. ( https://review.coreboot.org/28584

Change subject: soc/sifive/fu540: Implement uart_platform_refclk for UART divisor calculation
......................................................................

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
---
M src/soc/sifive/fu540/uart.c
1 file changed, 8 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/84/28584/1

diff --git a/src/soc/sifive/fu540/uart.c b/src/soc/sifive/fu540/uart.c
index c53f42d..b563be1 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 @@
    /*
     * 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;
 }