From: Alexey Pelykh <alexey.pel...@gmail.com>
Partially reverts 1776fd059c40907297d6c26c51876575d63fd9e2
that introduced regression reported by Paul Walmsley.
This commit restores setting granularity in SCR register
and adds note about comments below being inconsistent with
actual code.
Signed-off-by: Alexey Pelykh <alexey.pel...@gmail.com>
Cc: Paul Walmsley <p...@pwsan.com>
Cc: Kevin Hilman <khil...@linaro.org>
Cc: Felipe Balbi <ba...@ti.com>
Cc: linux-ser...@vger.kernel.org
Cc: linux-arm-ker...@lists.infradead.org
Cc: linux-omap@vger.kernel.org
---
Paul, please confirm that this patch solves the regression.
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 4dc4140..30d4f7a 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -886,6 +886,17 @@ serial_omap_set_termios(struct uart_port *port, struct
ktermios *termios,
serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR);
/* FIFO ENABLE, DMA MODE */
+ up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK;
+ /*
+ * NOTE: Setting OMAP_UART_SCR_RX_TRIG_GRANU1_MASK
+ * sets Enables the granularity of 1 for TRIGGER RX
+ * level. Along with setting RX FIFO trigger level
+ * to 1 (as noted below, 16 characters) and TLR[3:0]
+ * to zero this will result RX FIFO threshold level
+ * to 1 character, instead of 16 as noted in comment
+ * below.
+ */
+
/* Set receive FIFO threshold to 16 characters and
* transmit FIFO threshold to 16 spaces
*/
--
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