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authorSimon Glass <sjg@chromium.org>2015-07-02 18:15:53 -0600
committerSimon Glass <sjg@chromium.org>2015-08-05 21:06:11 -0600
commit89ca9351cf85ed0843a1a82d626560e0dadb3fe5 (patch)
tree7818172827e779b426728c13ed1252f897092012 /drivers/serial
parentf48eaf01b2f7212987166aae970b895c7e215466 (diff)
exynos: serial: Refactor init code for debug UART
The debug UART code needs to perform the same init as the normal UART driver. In preparation for this, move the init code into two functions, one for the basic init and one for setting the baud rate. This will make adding debug UART support easier. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/serial_s5p.c36
1 files changed, 24 insertions, 12 deletions
diff --git a/drivers/serial/serial_s5p.c b/drivers/serial/serial_s5p.c
index 8469afdaae..7abec53f80 100644
--- a/drivers/serial/serial_s5p.c
+++ b/drivers/serial/serial_s5p.c
@@ -14,8 +14,8 @@
#include <fdtdec.h>
#include <linux/compiler.h>
#include <asm/io.h>
-#include <asm/arch/uart.h>
#include <asm/arch/clk.h>
+#include <asm/arch/uart.h>
#include <serial.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -59,11 +59,20 @@ static const int udivslot[] = {
0xffdf,
};
-int s5p_serial_setbrg(struct udevice *dev, int baudrate)
+static void __maybe_unused s5p_serial_init(struct s5p_uart *uart)
+{
+ /* enable FIFOs, auto clear Rx FIFO */
+ writel(0x3, &uart->ufcon);
+ writel(0, &uart->umcon);
+ /* 8N1 */
+ writel(0x3, &uart->ulcon);
+ /* No interrupts, no DMA, pure polling */
+ writel(0x245, &uart->ucon);
+}
+
+static void __maybe_unused s5p_serial_baud(struct s5p_uart *uart, uint uclk,
+ int baudrate)
{
- struct s5p_serial_platdata *plat = dev->platdata;
- struct s5p_uart *const uart = plat->reg;
- u32 uclk = get_uart_clk(plat->port_id);
u32 val;
val = uclk / baudrate;
@@ -74,6 +83,15 @@ int s5p_serial_setbrg(struct udevice *dev, int baudrate)
writew(udivslot[val % 16], &uart->rest.slot);
else
writeb(val % 16, &uart->rest.value);
+}
+
+int s5p_serial_setbrg(struct udevice *dev, int baudrate)
+{
+ struct s5p_serial_platdata *plat = dev->platdata;
+ struct s5p_uart *const uart = plat->reg;
+ u32 uclk = get_uart_clk(plat->port_id);
+
+ s5p_serial_baud(uart, uclk, baudrate);
return 0;
}
@@ -83,13 +101,7 @@ static int s5p_serial_probe(struct udevice *dev)
struct s5p_serial_platdata *plat = dev->platdata;
struct s5p_uart *const uart = plat->reg;
- /* enable FIFOs, auto clear Rx FIFO */
- writel(0x3, &uart->ufcon);
- writel(0, &uart->umcon);
- /* 8N1 */
- writel(0x3, &uart->ulcon);
- /* No interrupts, no DMA, pure polling */
- writel(0x245, &uart->ucon);
+ s5p_serial_init(uart);
return 0;
}