linux-kernel - Re: [PATCH v2] PCI: keystone: Fix ks_pcie_v3_65_add

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Message-ID: <bd9f3512-3db2-47a7-ba88-b8b935ae6af7@ti.com>
Date:   Thu, 19 Oct 2023 13:52:27 +0530
From:   Siddharth Vadapalli <s-vadapalli@...com>
To:     Bjorn Helgaas <helgaas@...nel.org>
CC:     <lpieralisi@...nel.org>, <robh@...nel.org>, <kw@...ux.com>,
        <bhelgaas@...gle.com>, <linux-pci@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <r-gunasekaran@...com>,
        <srk@...com>, Serge Semin <fancer.lancer@...il.com>,
        <s-vadapalli@...com>
Subject: Re: [PATCH v2] PCI: keystone: Fix ks_pcie_v3_65_add_bus() for AM654x
 SoC



On 19/10/23 10:14, Siddharth Vadapalli wrote:
> Hello Bjorn,
> 
> On 18/10/23 22:06, Bjorn Helgaas wrote:
>> [+cc Serge (please cc people who have commented on previous revisions)]
> 
> Sure, I will do so.
> 

...

> 
> Yes, I will follow Serge's suggestion of adding a new pci_ops structure for the
> AM654x SoC which uses the new 4.90a controller. I have described it at:
> https://lore.kernel.org/r/ba217723-1501-4e72-b143-e0047266ea9a@ti.com/
> and am summarizing it below:
> 
> I will add the following:
> static struct pci_ops ks_pcie_am6_ops = {
> 	.map_bus = dw_pcie_own_conf_map_bus,
> 	.read = pci_generic_config_read,
> 	.write = pci_generic_config_write,
> };
> which shall be used for AM654x SoC
> 
> I will also modify the contents of ks_pcie_host_init() as follows:
> if(ks_pcie->is_am6)
> 	pp->bridge->ops = &ks_pcie_am6_ops;
> else
> 	pp->bridge->ops = &ks_pcie_ops;
> 
> which will ensure that the .add_bus() method is no longer applicable to the
> AM654x SoC, which was the case prior to commit 6ab15b5e7057.
> 
> I shall post the v3 patch with the above changes and also Cc Serge.

I have posted the v3 patch at:
https://lore.kernel.org/r/20231019081330.2975470-1-s-vadapalli@ti.com/
and have copied Serge in the mail.

> 

-- 
Regards,
Siddharth.