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

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On 4 September 2014 04:56, Arnd Bergmann <arnd@xxxxxxxx> 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
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