From: gregory.clement@free-electrons•com (Gregory CLEMENT)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v4 13/13] ARM: mvebu: register the cpuidle driver for the Armada XP SoCs
Date: Wed, 19 Feb 2014 17:52:31 +0100 [thread overview]
Message-ID: <5304E14F.3020303@free-electrons.com> (raw)
In-Reply-To: <20140219174634.17123478@skate>
On 19/02/2014 17:46, Thomas Petazzoni wrote:
> Dear Gregory CLEMENT,
>
> On Thu, 13 Feb 2014 18:33:36 +0100, Gregory CLEMENT wrote:
>> The cpuidle is a platform driver so we have to register the device
>> during the initialization of the boards.
>>
>> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons•com>
>> ---
>> arch/arm/mach-mvebu/armada-370-xp.c | 12 ++++++++++++
>> 1 file changed, 12 insertions(+)
>>
>> diff --git a/arch/arm/mach-mvebu/armada-370-xp.c b/arch/arm/mach-mvebu/armada-370-xp.c
>> index f6c9d1d85c14..81b42980311c 100644
>> --- a/arch/arm/mach-mvebu/armada-370-xp.c
>> +++ b/arch/arm/mach-mvebu/armada-370-xp.c
>> @@ -30,6 +30,11 @@
>> #include "common.h"
>> #include "coherency.h"
>> #include "mvebu-soc-id.h"
>> +#include "pmsu.h"
>> +
>> +static struct platform_device armada_xp_cpuidle_device = {
>> + .name = "cpuidle-armada-370-xp",
>> +};
>>
>> static void __init armada_370_xp_map_io(void)
>> {
>> @@ -80,6 +85,13 @@ static void __init armada_370_xp_dt_init(void)
>> if (of_machine_is_compatible("plathome,openblocks-ax3-4"))
>> i2c_quirk();
>> of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
>> + if (of_find_compatible_node(NULL, NULL, "marvell,armada-370-xp-pmsu")
>> + && of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric")
>> + && of_machine_is_compatible("marvell,armadaxp")) {
>> + armada_370_xp_pmsu_enable_l2_powerdown_onidle();
>> + armada_370_xp_cpu_pm_init();
>> + platform_device_register(&armada_xp_cpuidle_device);
>> + }
>
> What about putting this in pmsu.c, in an arch_initcall() (or some other
> initcall level) ? The cpuidle feature is really tied to the PMSU, so I
> believe it makes sense to have the cpuidle-armada-370-xp
> platform_device declared and registered in pmsu.c. As an added bonus,
> you don't need to expose
> armada_370_xp_pmsu_enable_l2_powerdown_onidle() and
> armada_370_xp_cpu_pm_init() in a header: they can remain static
> functions private to pmsu.c.
It sounds like a good idea, the tricky part will be to find the accurate
initcall level: not too early and not too late.
Thanks,
Gregory
>
> Thomas
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2014-02-19 16:52 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-13 17:33 [PATCH v4 00/13] CPU idle for Armada XP Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 01/13] ARM: PJ4B: Add cpu_suspend/cpu_resume hooks for PJ4B Gregory CLEMENT
2014-02-14 16:06 ` Lorenzo Pieralisi
2014-03-25 22:57 ` Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 02/13] ARM: mvebu: remove the address parameter for ll_set_cpu_coherent Gregory CLEMENT
2014-02-19 16:06 ` Thomas Petazzoni
2014-02-13 17:33 ` [PATCH v4 03/13] ARM: mvebu: ll_set_cpu_coherent always uses the current CPU Gregory CLEMENT
2014-02-19 16:09 ` Thomas Petazzoni
2014-02-19 16:17 ` Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 04/13] ARM: mvebu: Remove the unused argument of set_cpu_coherent() Gregory CLEMENT
2014-02-19 16:27 ` Thomas Petazzoni
2014-02-13 17:33 ` [PATCH v4 05/13] ARM: mvebu: Low level function to disable HW coherency support Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 06/13] ARM: mvebu: Add a new set of registers for pmsu Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 07/13] ARM: dts: mvebu: Add a new set of registers to the PMSU node Gregory CLEMENT
2014-02-17 2:57 ` Jason Cooper
2014-02-19 16:00 ` Thomas Petazzoni
2014-02-19 17:49 ` Gregory CLEMENT
2014-02-19 18:21 ` Thomas Petazzoni
2014-02-13 17:33 ` [PATCH v4 08/13] ARM: mvebu: Allow to power down L2 cache controller in idle mode Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 09/13] ARM: mvebu: Add the PMSU related part of the cpu idle functions Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 10/13] ARM: mvebu: Set the start address of a CPU in a separate function Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 11/13] ARM: mvebu: Register notifier callback for the cpuidle transition Gregory CLEMENT
2014-02-13 17:33 ` [PATCH v4 12/13] cpuidle: mvebu: Add initial CPU idle support for Armada 370/XP SoC Gregory CLEMENT
2014-02-14 17:00 ` Lorenzo Pieralisi
2014-03-25 22:57 ` Gregory CLEMENT
2014-02-17 8:49 ` Daniel Lezcano
2014-03-25 22:57 ` Gregory CLEMENT
2014-02-19 16:51 ` Thomas Petazzoni
2014-02-19 17:19 ` Gregory CLEMENT
2014-02-19 18:32 ` Thomas Petazzoni
2014-02-13 17:33 ` [PATCH v4 13/13] ARM: mvebu: register the cpuidle driver for the Armada XP SoCs Gregory CLEMENT
2014-02-19 16:46 ` Thomas Petazzoni
2014-02-19 16:52 ` Gregory CLEMENT [this message]
2014-02-19 17:01 ` Thomas Petazzoni
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