msm_serial: fix clock rate on DMA-based uarts

PATCH New David Brown 1 participant 1 message Sep 7, 2012

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Arm Qualcomm mailing list TTY layer and serial drivers

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David Brown

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2012-09-07 21:45 UTC #0 lore raw

PATCH 1/1 msm_serial: fix clock rate on DMA-based uarts

The driver explicitly requests a clock rate for the UART, but it is off by a factor of four from the dividers that it programs into the UART. Fix this by setting the rate to 1/4 of the current value.

Signed-off-by David Brown <[email protected]>

---
 drivers/tty/serial/msm_serial.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

drivers/tty/serial/msm_serial.c +1 -1

index 8131e2c..033e0bc 100644
@@ -896,7 +896,7 @@ static int __init msm_serial_probe(struct platform_device *pdev)
 			return PTR_ERR(msm_port->clk);
 
 	if (msm_port->is_uartdm)
-		clk_set_rate(msm_port->clk, 7372800);
+		clk_set_rate(msm_port->clk, 1843200);
 
 	port->uartclk = clk_get_rate(msm_port->clk);
 	printk(KERN_INFO "uartclk = %d\n", port->uartclk);

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