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From: sebastian.hesselbarth@gmail.com (Sebastian Hesselbarth)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 4/5] PCI: mvebu: add support for reset on GPIO
Date: Wed, 14 Aug 2013 11:25:02 +0200	[thread overview]
Message-ID: <520B4CEE.2050508@gmail.com> (raw)
In-Reply-To: <20130814090715.GA2084@ulmo>

On 08/14/2013 11:07 AM, Thierry Reding wrote:
> On Tue, Aug 13, 2013 at 02:25:23PM +0200, Sebastian Hesselbarth wrote:
> [...]
>> diff --git a/drivers/pci/host/pci-mvebu.c b/drivers/pci/host/pci-mvebu.c
> [...]
>> @@ -897,6 +904,30 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
> [...]
>> +			u32 reset_udelay = 20000;
> [...]
>> +			udelay(reset_udelay);
>
> udelay(20000) is probably not a good idea. You should probably use
> something like usleep_range() or msleep() here. Also see:
>
> 	Documentation/timers/timers-howto.txt

Thierry,

thanks for mentioning this. I clearly got distracted from ms to us
switch due to the different reset API convention. As the delay will
be most likely 10ms+, we should change the above to
msleep(reset_udelay/1000) instead.

Sebastian

  reply	other threads:[~2013-08-14  9:25 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-13 12:25 [PATCH v2 0/5] ARM: dove: DT PCIe support Sebastian Hesselbarth
2013-08-13 12:25 ` [PATCH v2 1/5] PCI: mvebu: move clock enable before register access Sebastian Hesselbarth
2013-08-13 12:25 ` [PATCH v2 2/5] PCI: mvebu: increment nports only for registered ports Sebastian Hesselbarth
2013-08-13 12:25 ` [PATCH v2 3/5] PCI: mvebu: remove subsys_initcall Sebastian Hesselbarth
2013-08-13 12:25 ` [PATCH v2 4/5] PCI: mvebu: add support for reset on GPIO Sebastian Hesselbarth
2013-08-13 20:29   ` Thomas Petazzoni
2013-08-13 21:26     ` Jason Cooper
2013-08-14  9:07   ` Thierry Reding
2013-08-14  9:25     ` Sebastian Hesselbarth [this message]
2013-08-14 11:53       ` Jason Cooper
2013-08-13 12:25 ` [PATCH v2 5/5] PCI: mvebu: add support for Marvell Dove SoCs Sebastian Hesselbarth
2013-08-13 14:01 ` [PATCH v2 0/5] ARM: dove: DT PCIe support Jason Cooper
2013-08-13 15:11   ` Jason Cooper
2013-08-13 17:19   ` Bjorn Helgaas
2013-08-13 18:49 ` Jason Cooper
2013-08-15 16:16 ` Thomas Petazzoni

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