From: Akshay Saraswat <aksha...@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 <rajeshwar...@samsung.com>
Signed-off-by: Akshay Saraswat <aksha...@samsung.com>
---
Changes in V2:
- None
Changes in V3:
- None
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
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