[U-Boot] [PATCH 3/4] board: advantech: dms-ba16: fix AR8033 reset timing issue

Ken Lin yungching0725 at gmail.com
Tue Mar 28 17:51:24 UTC 2017


Add the delay (10ms) to ensure the clock is stable and to meet the clock-to-reset(1ms) requirement recommended in the AR8033 datasheet

Signed-off-by: Ken Lin <yungching0725 at gmail.com>
---
 board/advantech/dms-ba16/dms-ba16.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/board/advantech/dms-ba16/dms-ba16.c b/board/advantech/dms-ba16/dms-ba16.c
index 8aa7ff1659..75b0bbc2cc 100644
--- a/board/advantech/dms-ba16/dms-ba16.c
+++ b/board/advantech/dms-ba16/dms-ba16.c
@@ -103,8 +103,9 @@ static void setup_iomux_enet(void)
 
 	/* Reset AR8033 PHY */
 	gpio_direction_output(IMX_GPIO_NR(1, 28), 0);
-	udelay(500);
+	mdelay(10);
 	gpio_set_value(IMX_GPIO_NR(1, 28), 1);
+	mdelay(1);
 }
 
 static iomux_v3_cfg_t const usdhc2_pads[] = {
-- 
2.11.0



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