Author: adrian
Date: Thu Dec 29 17:31:07 2016
New Revision: 310780
URL: https://svnweb.freebsd.org/changeset/base/310780
Log:
[ar71xx] put in an implicit read-after-write to flush things out.
Note: I may need to revisit this for mips74k.
Modified:
head/sys/mips/atheros/ar71xxreg.h
Modified: head/sys/mips/atheros/ar71xxreg.h
==============================================================================
--- head/sys/mips/atheros/ar71xxreg.h Thu Dec 29 16:35:49 2016
(r310779)
+++ head/sys/mips/atheros/ar71xxreg.h Thu Dec 29 17:31:07 2016
(r310780)
@@ -527,7 +527,10 @@ typedef enum {
*((volatile uint32_t *)MIPS_PHYS_TO_KSEG1((reg)))
#define ATH_WRITE_REG(reg, val) \
- *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1((reg))) = (val)
+ do { \
+ *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1((reg))) = (val); \
+ (void) ATH_READ_REG(reg); \
+ } while (0)
static inline void
ar71xx_ddr_flush(uint32_t reg)
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