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-rw-r--r--src/soc/amd/picasso/southbridge.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/southbridge.c b/src/soc/amd/picasso/southbridge.c
index a18f5a37bd..d2904d894b 100644
--- a/src/soc/amd/picasso/southbridge.c
+++ b/src/soc/amd/picasso/southbridge.c
@@ -226,6 +226,13 @@ void fch_pre_init(void)
sb_enable_legacy_io();
enable_aoac_devices();
sb_reset_i2c_slaves();
+
+ /*
+ * On reset Range_0 defaults to enabled. We want to start with a clean
+ * slate to not have things unexpectedly enabled.
+ */
+ clear_uart_legacy_config();
+
if (CONFIG(PICASSO_UART))
set_uart_config(CONFIG_UART_FOR_CONSOLE);
}