[PATCH] edb93xx: Enable UART1

[PATCH] edb93xx: Enable UART1

[Matthias Kaehlcke]

edb93xx: according to the datasheet UART1 needs to be enabled explicitly

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
---
 board/edb93xx/edb93xx.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/board/edb93xx/edb93xx.c b/board/edb93xx/edb93xx.c
index add88e1..6316988 100644
--- a/board/edb93xx/edb93xx.c
+++ b/board/edb93xx/edb93xx.c
@@ -32,6 +32,8 @@
 #include <mach/ep93xx-regs.h>
 #include "edb93xx.h"
 
+#define DEVCFG_U1EN (1 << 18)
+
 /*
  * Up to 32MiB NOR type flash, connected to
  * CS line 6, data width is 16 bit
@@ -164,6 +166,12 @@ static int edb93xx_console_init(void)
 	value |= SYSCON_PWRCNT_UART_BAUD;
 	writel(value, &syscon->pwrcnt);
 
+	/* Enable UART1 */
+	value = readl(&syscon->devicecfg);
+	value |= DEVCFG_U1EN;
+	writel(0xAA, &syscon->sysswlock);
+	writel(value, &syscon->devicecfg);
+
 	register_device(&edb93xx_serial_device);
 
 	return 0;
-- 
1.6.5


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

[PATCH] edb93xx: Avoid stack usage in early_udelay()

[Matthias Kaehlcke]

edb93xx: The purpose of early_udelay() is to provide delay functionality in the
early board setup, when the stack isn't set up yet. With some compiler versions
the current implementation makes use of the stack and ends up crashing. Fix this
by removing an explicit division from early_udelay()

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
---
 board/edb93xx/early_udelay.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/board/edb93xx/early_udelay.h b/board/edb93xx/early_udelay.h
index 3b26b3f..185283d 100644
--- a/board/edb93xx/early_udelay.h
+++ b/board/edb93xx/early_udelay.h
@@ -26,7 +26,7 @@
 static inline void early_udelay(uint32_t usecs)
 {
 	/* loop takes 4 cycles at 5.0ns (fastest case, running at 200MHz) */
-	register uint32_t loops = (usecs * 1000) / 20;
+	register uint32_t loops = usecs * (1000 / 20);
 
 	__asm__ volatile ("1:\n"
 			"subs %0, %1, #1\n"
-- 
1.6.5


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox