Re: [Linaro-acpi] [PATCH v5 1/2] Mailbox: Add support for Platform Communication Channel

On 4 September 2014 04:56, Arnd Bergmann arnd@arndb.de wrote:

...

• /* Write to the shared comm region. */
  

• iowrite16(cmd, &generic_comm_base->command);
  

• /* Write Subspace MAGIC value so platform can identify destination. */
  

• iowrite32((PCCS_SS_SIG_MAGIC | ss_idx), &generic_comm_base->signature);
  

• /* Flip CMD COMPLETE bit */
  

• iowrite16(0, &generic_comm_base->status);
  

using writel_relaxed/writew_relaxed should be more efficient here.

x86 doesn't seem to have the write*_relaxed variants? They seem to have read*_relaxed though.

Ashwin