svn commit: r345405 - head/sys/dev/uart

[Colin Percival]

Author: cperciva
Date: Fri Mar 22 06:21:03 2019
New Revision: 345405
URL: https://svnweb.freebsd.org/changeset/base/345405

Log:
  Obey SPCR AccessWidth parameter.
  
  The "access width" value was hard-coded as 2, indicating 32-bit accesses;
  instead, use the value specified in the SPCR table.
  
  This unbreaks the console on EC2 "A1" family instances.
  
  Submitted by:	Greg V

Modified:
  head/sys/dev/uart/uart_cpu_arm64.c

Modified: head/sys/dev/uart/uart_cpu_arm64.c
==============================================================================
--- head/sys/dev/uart/uart_cpu_arm64.c	Fri Mar 22 06:02:06 2019	(r345404)
+++ head/sys/dev/uart/uart_cpu_arm64.c	Fri Mar 22 06:21:03 2019	(r345405)
@@ -149,7 +149,7 @@ uart_cpu_acpi_probe(struct uart_class **classp, bus_sp
 
 	*classp = cd->cd_class;
 	*rclk = 0;
-	*shiftp = 2;
+	*shiftp = spcr->SerialPort.AccessWidth - 1;
 	*iowidthp = spcr->SerialPort.BitWidth / 8;
 
 out: