From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [PATCH v23 09/11] acpi/arm64: Add memory-mapped timer support in GTDT driver Date: Mon, 3 Apr 2017 10:49:45 +0100 Message-ID: <20170403094944.GC5706@arm.com> References: <20170331175105.8370-1-fu.wei@linaro.org> <20170331175105.8370-10-fu.wei@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from foss.arm.com ([217.140.101.70]:56414 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751845AbdDCJt2 (ORCPT ); Mon, 3 Apr 2017 05:49:28 -0400 Content-Disposition: inline In-Reply-To: <20170331175105.8370-10-fu.wei@linaro.org> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: fu.wei@linaro.org Cc: rjw@rjwysocki.net, lenb@kernel.org, daniel.lezcano@linaro.org, tglx@linutronix.de, marc.zyngier@arm.com, mark.rutland@arm.com, lorenzo.pieralisi@arm.com, sudeep.holla@arm.com, hanjun.guo@linaro.org, linux-arm-kernel@lists.infradead.org, linaro-acpi@lists.linaro.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, rruigrok@codeaurora.org, harba@codeaurora.org, cov@codeaurora.org, timur@codeaurora.org, graeme.gregory@linaro.org, al.stone@linaro.org, jcm@redhat.com, wei@redhat.com, arnd@arndb.de, catalin.marinas@arm.com, Suravee.Suthikulpanit@amd.com, leo.duran@amd.com, wim@iguana.be, linux@roeck-us.net, linux-watchdog@vger.kernel.org, tn@semihalf.com, christoffer.dall@linaro.org, julien.grall@arm.com On Sat, Apr 01, 2017 at 01:51:03AM +0800, fu.wei@linaro.org wrote: > From: Fu Wei > > On platforms booting with ACPI, architected memory-mapped timers' > configuration data is provided by firmware through the ACPI GTDT > static table. > > The clocksource architected timer kernel driver requires a firmware > interface to collect timer configuration and configure its driver. > this infrastructure is present for device tree systems, but it is > missing on systems booting with ACPI. > > Implement the kernel infrastructure required to parse the static > ACPI GTDT table so that the architected timer clocksource driver can > make use of it on systems booting with ACPI, therefore enabling > the corresponding timers configuration. > > Signed-off-by: Fu Wei > Signed-off-by: Hanjun Guo > --- > drivers/acpi/arm64/gtdt.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++ > include/linux/acpi.h | 1 + > 2 files changed, 147 insertions(+) We need Lorenzo's ack on this. Will From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Mon, 3 Apr 2017 10:49:45 +0100 Subject: [PATCH v23 09/11] acpi/arm64: Add memory-mapped timer support in GTDT driver In-Reply-To: <20170331175105.8370-10-fu.wei@linaro.org> References: <20170331175105.8370-1-fu.wei@linaro.org> <20170331175105.8370-10-fu.wei@linaro.org> Message-ID: <20170403094944.GC5706@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sat, Apr 01, 2017 at 01:51:03AM +0800, fu.wei at linaro.org wrote: > From: Fu Wei > > On platforms booting with ACPI, architected memory-mapped timers' > configuration data is provided by firmware through the ACPI GTDT > static table. > > The clocksource architected timer kernel driver requires a firmware > interface to collect timer configuration and configure its driver. > this infrastructure is present for device tree systems, but it is > missing on systems booting with ACPI. > > Implement the kernel infrastructure required to parse the static > ACPI GTDT table so that the architected timer clocksource driver can > make use of it on systems booting with ACPI, therefore enabling > the corresponding timers configuration. > > Signed-off-by: Fu Wei > Signed-off-by: Hanjun Guo > --- > drivers/acpi/arm64/gtdt.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++ > include/linux/acpi.h | 1 + > 2 files changed, 147 insertions(+) We need Lorenzo's ack on this. Will