From: Akshay Saraswat akshay.s@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@samsung.com Signed-off-by: Akshay Saraswat akshay.s@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);