sh: reset hardware from early printk
Reset the transmitter and receiver when setting up early printk.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/early_printk.c b/arch/sh/kernel/early_printk.c
index 11b4c85..6b7d166 100644
--- a/arch/sh/kernel/early_printk.c
+++ b/arch/sh/kernel/early_printk.c
@@ -167,6 +167,7 @@
} while (!(status & SCxSR_TEND(port)));
sci_out(port, SCSCR, 0); /* TE=0, RE=0 */
+ sci_out(port, SCFCR, SCFCR_RFRST | SCFCR_TFRST);
sci_out(port, SCSMR, 0);
/* Set baud rate */
@@ -174,12 +175,11 @@
(32 * baud) - 1);
udelay((1000000+(baud-1)) / baud); /* Wait one bit interval */
- sci_out(port, SCFCR, 12);
- sci_out(port, SCFCR, 8);
-
sci_out(port, SCSPTR, 0);
sci_out(port, SCxSR, 0x60);
sci_out(port, SCLSR, 0);
+
+ sci_out(port, SCFCR, 0);
sci_out(port, SCSCR, 0x30); /* TE=1, RE=1 */
}
#endif /* defined(CONFIG_CPU_SUBTYPE_SH7720) */