linux-kernel - Re: [PATCH 2/3] PCI: dwc: Add common iATU register support

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Message-ID: <a7cbceee-aaee-e770-85a8-99ee2eab0466@socionext.com>
Date:   Mon, 28 Sep 2020 09:55:51 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     Rob Herring <robh@...nel.org>
Cc:     devicetree@...r.kernel.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        linux-kernel@...r.kernel.org,
        Murali Karicheri <m-karicheri2@...com>,
        linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/3] PCI: dwc: Add common iATU register support

On 2020/09/25 18:10, Kunihiko Hayashi wrote:
> Hi Rob,
> 
> On 2020/09/24 0:57, Rob Herring wrote:
>> On Fri, Sep 11, 2020 at 05:50:02PM +0900, Kunihiko Hayashi wrote:
>>> This gets iATU register area from reg property that has reg-names "atu".
>>> In Synopsys DWC version 4.80 or later, since iATU register area is
>>> separated from core register area, this area is necessary to get from
>>> DT independently.
>>>
>>> Cc: Murali Karicheri <m-karicheri2@...com>
>>> Cc: Jingoo Han <jingoohan1@...il.com>
>>> Cc: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
>>> Suggested-by: Rob Herring <robh@...nel.org>
>>> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
>>> ---
>>>   drivers/pci/controller/dwc/pcie-designware.c | 8 +++++++-
>>>   1 file changed, 7 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
>>> index 4d105ef..4a360bc 100644
>>> --- a/drivers/pci/controller/dwc/pcie-designware.c
>>> +++ b/drivers/pci/controller/dwc/pcie-designware.c
>>> @@ -10,6 +10,7 @@
>>>   #include <linux/delay.h>
>>>   #include <linux/of.h>
>>> +#include <linux/of_platform.h>
>>>   #include <linux/types.h>
>>>   #include "../../pci.h"
>>> @@ -526,11 +527,16 @@ void dw_pcie_setup(struct dw_pcie *pci)
>>>       u32 val;
>>>       struct device *dev = pci->dev;
>>>       struct device_node *np = dev->of_node;
>>> +    struct platform_device *pdev;
>>>       if (pci->version >= 0x480A || (!pci->version &&
>>>                          dw_pcie_iatu_unroll_enabled(pci))) {
>>>           pci->iatu_unroll_enabled = true;
>>> -        if (!pci->atu_base)
>>> +        pdev = of_find_device_by_node(np);
>>
>> Use to_platform_device(dev) instead. Put that at the beginning as I'm
>> going to move 'dbi' in here too.
> 
> Okay, I'll rewrite it with to_platform_device(dev).
> Should I refer somewhere to rebase to your change?
It seems there is no dbi patch yet, so I'm going to send v2 in advance
for now. I can rebase it if necessary.

Thank you,

---
Best Regards
Kunihiko Hayashi