[U-Boot] [PATCH 06/10] Exynos5420: Alter UNCON and UFCON for 5420

[Rajeshwari S Shinde]

From: Akshay Saraswat <akshay.s at samsung.com>

This patch modifies UNCON and UFCON values to make s5p
serial support exynos5420 by doing following changes:
*  Enable Rx time-out interrupts.
*  Make Rx time-out interrupt interval = 32 frame time.
*  Enable DMA mode.
*  Enable FIFO.
*  Make Rx FIFO Trigger level 64, 16 and 4 bytes for channels
   channels 0, 1 and 2/3 respectively.
*  Make Tx FIFO Trigger level 32, 8 and 2 bytes for channels
   channels 0, 1 and 2/3 respectively.

Signed-off-by: Rajeshwari S Shinde <rajeshwari.s at samsung.com>
Signed-off-by: Akshay Saraswat <akshay.s at samsung.com>
---
 drivers/serial/serial_s5p.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c
index f98b422..b939084 100644
--- a/drivers/serial/serial_s5p.c
+++ b/drivers/serial/serial_s5p.c
@@ -107,6 +107,12 @@ int serial_init_dev(const int dev_index)
 	writel(0x3, &uart->ulcon);
 	/* No interrupts, no DMA, pure polling */
 	writel(0x245, &uart->ucon);
+	if (proid_is_exynos5420()) {
+		/* Enable interrupts and Enable DMA mode */
+		writel(0x3045, &uart->ucon);
+		/* enable FIFOs */
+		writel(0x111, &uart->ufcon);
+	}
 
 	serial_setbrg_dev(dev_index);
 
-- 
1.7.12.4