From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754755AbcHBWHo (ORCPT ); Tue, 2 Aug 2016 18:07:44 -0400 Received: from mail-cys01nam02on0077.outbound.protection.outlook.com ([104.47.37.77]:30310 "EHLO NAM02-CY1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753247AbcHBWHg (ORCPT ); Tue, 2 Aug 2016 18:07:36 -0400 X-Greylist: delayed 990 seconds by postgrey-1.27 at vger.kernel.org; Tue, 02 Aug 2016 18:07:11 EDT Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=David.Daney@cavium.com; Message-ID: <57A11575.2070000@caviumnetworks.com> Date: Tue, 2 Aug 2016 14:49:41 -0700 From: David Daney User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 MIME-Version: 1.0 To: Mark Brown CC: Jan Glauber , , , David Daney , "Steven J . 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But does it matter? We are not currently using ACPI on systems >> where this driver is used. > >> In the future, if we ever need ACPI support, we will add support for it. > > Oh, that's surprising - I thought these were server systems. There are two broad classes of systems targeted by Cavium's arm64 based SoCs: 1) 2-node NUMA servers with 96 CPUs running UEFI firmware and ACPI. For these, any SPI buses are managed by the firmware and we don't need Kernel support. 2) Embedded controllers with 4 - 32 CPUs, typically running u-boot and OF device tree firmware descriptions. For these configurations, SPI buses managed by the kernel must be supported. > With ACPI > you need to use DMI data or something to instantiate the clock. In any > case if you've got it working that should be OK. >