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[v3,2/4] omap-serial: Use default clock speed (48Mhz) if not specified

Message ID 1323863746-18145-3-git-send-email-rnayak@ti.com
State Accepted
Commit 8fe789dc375a1929bf64a9b982140cf394c8bce5
Headers show

Commit Message

Rajendra Nayak Dec. 14, 2011, 11:55 a.m. UTC 
Use a default clock speed of 48Mhz, instead of ending up with 0,
if platforms fail to specify a valid clock speed.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
---
 drivers/tty/serial/omap-serial.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
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Patch

diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index a02cc9f..f14b9c5 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -43,6 +43,8 @@ 
 #include <plat/dmtimer.h>
 #include <plat/omap-serial.h>
 
+#define DEFAULT_CLK_SPEED 48000000 /* 48Mhz*/
+
 static struct uart_omap_port *ui[OMAP_MAX_HSUART_PORTS];
 
 /* Forward declaration of functions */
@@ -1386,6 +1388,11 @@  static int serial_omap_probe(struct platform_device *pdev)
 
 	up->port.flags = omap_up_info->flags;
 	up->port.uartclk = omap_up_info->uartclk;
+	if (!up->port.uartclk) {
+		up->port.uartclk = DEFAULT_CLK_SPEED;
+		dev_warn(&pdev->dev, "No clock speed specified: using default:"
+						"%d\n", DEFAULT_CLK_SPEED);
+	}
 	up->uart_dma.uart_base = mem->start;
 	up->errata = omap_up_info->errata;