Author: adrian
Date: Sat Sep 21 19:42:37 2013
New Revision: 255764
URL: http://svnweb.freebsd.org/changeset/base/255764
Log:
Fix the AR933x CPU UART support by using the correct clock when calculating
the UART frequency.
Tested:
* AR933x (carambola 2 board), UART now works again
Approved by: re
Modified:
head/sys/mips/atheros/ar933x_chip.c
Modified: head/sys/mips/atheros/ar933x_chip.c
==============================================================================
--- head/sys/mips/atheros/ar933x_chip.c Sat Sep 21 16:46:34 2013
(r255763)
+++ head/sys/mips/atheros/ar933x_chip.c Sat Sep 21 19:42:37 2013
(r255764)
@@ -115,8 +115,14 @@ ar933x_chip_detect_sys_frequency(void)
u_ar71xx_ahb_freq = freq / t;
}
- /* XXX uart should be the refclk, no? */
- u_ar71xx_uart_freq = u_ar71xx_ahb_freq;
+ /* On the AR933x, the UART frequency is the reference clock,
+ * not the AHB bus clock.
+ */
+ u_ar71xx_uart_freq = u_ar71xx_refclk;
+
+ /*
+ * XXX check what the watchdog frequency should be?
+ */
u_ar71xx_wdt_freq = u_ar71xx_ahb_freq;
}
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