From: Mark Rutland <mark.rutland@arm.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jonas Bonn <jonas@southpole.se>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Michal Simek <monstr@monstr.eu>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@arm.com>,
Tomasz Figa <tomasz.figa@gmail.com>,
"rob.herring@calxeda.com" <rob.herring@calxeda.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
"grant.likely@linaro.org" <grant.likely@linaro.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [RFC PATCH v2 3/4] powerpc: refactor of_get_cpu_node to support other architectures
Date: Mon, 19 Aug 2013 11:19:22 +0100 [thread overview]
Message-ID: <20130819101922.GI3719@e106331-lin.cambridge.arm.com> (raw)
In-Reply-To: <1376777376.25016.11.camel@pasglop>
On Sat, Aug 17, 2013 at 11:09:36PM +0100, Benjamin Herrenschmidt wrote:
> On Sat, 2013-08-17 at 12:50 +0200, Tomasz Figa wrote:
> > I wonder how would this handle uniprocessor ARM (pre-v7) cores, for
> > which
> > the updated bindings[1] define #address-cells = <0> and so no reg
> > property.
> >
> > [1] - http://thread.gmane.org/gmane.linux.ports.arm.kernel/260795
>
> Why did you do that in the binding ? That sounds like looking to create
> problems ...
>
> Traditionally, UP setups just used "0" as the "reg" property on other
> architectures, why do differently ?
The decision was taken because we defined our reg property to refer to
the MPIDR register's Aff{2,1,0} bitfields, and on UP cores before v7
there's no MPIDR register at all. Given there can only be a single CPU
in that case, describing a register that wasn't present didn't seem
necessary or helpful.
Thanks,
Mark.
next prev parent reply other threads:[~2013-08-19 10:20 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1374492747-13879-1-git-send-email-Sudeep.KarkadaNagesha@arm.com>
2013-08-15 17:09 ` [RFC PATCH 0/4] DT: move of_get_cpu_node from PPC to DT core Sudeep KarkadaNagesha
2013-08-15 17:09 ` [RFC PATCH 1/4] microblaze: remove undefined of_get_cpu_node declaration Sudeep KarkadaNagesha
2013-08-15 17:09 ` [RFC PATCH 2/4] openrisc: " Sudeep KarkadaNagesha
2013-08-16 9:41 ` Sudeep KarkadaNagesha
2013-08-21 5:10 ` Jonas Bonn
2013-08-15 17:09 ` [RFC PATCH 3/4] powerpc: refactor of_get_cpu_node to support other architectures Sudeep KarkadaNagesha
2013-08-16 4:49 ` Benjamin Herrenschmidt
2013-08-16 8:48 ` Sudeep KarkadaNagesha
2013-08-16 12:32 ` Benjamin Herrenschmidt
2013-08-16 12:44 ` Sudeep KarkadaNagesha
2013-08-16 4:50 ` Benjamin Herrenschmidt
2013-08-16 8:43 ` Sudeep KarkadaNagesha
2013-08-15 17:09 ` [RFC PATCH 4/4] of: move of_get_cpu_node implementation to DT core library Sudeep KarkadaNagesha
2013-08-16 17:39 ` [RFC PATCH v2 0/4] DT: move of_get_cpu_node from PPC to DT core Sudeep KarkadaNagesha
2013-08-16 17:39 ` [RFC PATCH v2 3/4] powerpc: refactor of_get_cpu_node to support other architectures Sudeep KarkadaNagesha
2013-08-16 22:13 ` Benjamin Herrenschmidt
2013-08-19 10:13 ` Sudeep KarkadaNagesha
2013-08-17 10:50 ` Tomasz Figa
2013-08-17 22:09 ` Benjamin Herrenschmidt
2013-08-17 22:22 ` Tomasz Figa
2013-08-19 10:19 ` Mark Rutland [this message]
2013-08-19 13:02 ` Rob Herring
2013-08-19 13:56 ` Sudeep KarkadaNagesha
2013-08-22 13:59 ` Mark Rutland
2013-08-22 16:51 ` Sudeep KarkadaNagesha
2013-08-28 19:46 ` Grant Likely
2013-08-29 9:50 ` Lorenzo Pieralisi
2013-08-16 17:39 ` [RFC PATCH v2 4/4] of: move of_get_cpu_node implementation to DT core library Sudeep KarkadaNagesha
2013-08-16 22:14 ` Benjamin Herrenschmidt
2013-08-19 10:21 ` Sudeep KarkadaNagesha
2013-08-19 13:11 ` Rob Herring
2013-08-19 13:24 ` Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 00/19] DT/core: update cpu device of_node Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 01/19] microblaze: remove undefined of_get_cpu_node declaration Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 02/19] openrisc: " Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 03/19] powerpc: refactor of_get_cpu_node to support other architectures Sudeep KarkadaNagesha
2013-08-20 12:27 ` Rafael J. Wysocki
2013-08-20 12:22 ` Sudeep KarkadaNagesha
2013-08-20 21:48 ` Benjamin Herrenschmidt
2013-08-22 6:15 ` Benjamin Herrenschmidt
2013-08-22 13:29 ` Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 04/19] of: move of_get_cpu_node implementation to DT core library Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 05/19] ARM: DT/kernel: define ARM specific arch_match_cpu_phys_id Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 06/19] driver/core: cpu: initialize of_node in cpu's device struture Sudeep KarkadaNagesha
2013-08-20 12:28 ` Rafael J. Wysocki
2013-08-20 15:18 ` Greg Kroah-Hartman
2013-08-20 9:30 ` [PATCH v4 07/19] of/device: add helper to get cpu device node from logical cpu index Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 08/19] ARM: topology: remove hwid/MPIDR dependency from cpu_capacity Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 09/19] ARM: mvebu: remove device tree parsing for cpu nodes Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 10/19] drivers/bus: arm-cci: avoid parsing DT for cpu device nodes Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 11/19] cpufreq: imx6q-cpufreq: remove device tree parsing for cpu nodes Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 12/19] cpufreq: cpufreq-cpu0: " Sudeep KarkadaNagesha
2013-09-06 13:44 ` Guennadi Liakhovetski
2013-09-09 9:24 ` Sudeep KarkadaNagesha
2013-09-09 14:32 ` Shawn Guo
2013-09-09 15:24 ` Sudeep KarkadaNagesha
2013-09-10 2:44 ` Shawn Guo
2013-09-10 10:56 ` Sudeep KarkadaNagesha
2013-09-10 11:19 ` Shawn Guo
2013-08-20 9:30 ` [PATCH v4 13/19] cpufreq: highbank-cpufreq: " Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 14/19] cpufreq: spear-cpufreq: " Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 15/19] cpufreq: kirkwood-cpufreq: " Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 16/19] cpufreq: arm_big_little: " Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 17/19] cpufreq: maple-cpufreq: " Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 18/19] cpufreq: pmac64-cpufreq: " Sudeep KarkadaNagesha
2013-08-20 9:30 ` [PATCH v4 19/19] cpufreq: pmac32-cpufreq: " Sudeep KarkadaNagesha
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