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SubjectRe: [PATCH V5 2/3] PCI: Create device tree node for selected devices
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On 1/2/23 05:56, Clément Léger wrote:
> Le Thu, 15 Dec 2022 09:30:45 -0800,
> Lizhi Hou <lizhi.hou@amd.com> a écrit :
>
>> +};
>> +
>> +static int of_pci_prop_device_type(struct pci_dev *pdev,
>> + struct of_changeset *ocs,
>> + struct device_node *np)
>> +{
>> + return of_changeset_add_prop_string(ocs, np, "device_type", "pci");
>> +}
>> +
>> +static int of_pci_prop_address_cells(struct pci_dev *pdev,
>> + struct of_changeset *ocs,
>> + struct device_node *np)
>> +{
>> + return of_changeset_add_prop_u32(ocs, np, "#address_cells",
>> + OF_PCI_ADDRESS_CELLS);
>> +}
>> +
>> +static int of_pci_prop_size_cells(struct pci_dev *pdev,
>> + struct of_changeset *ocs,
>> + struct device_node *np)
>> +{
>> + return of_changeset_add_prop_u32(ocs, np, "#size_cells",
>> + OF_PCI_SIZE_CELLS);
>> +}
> Hi Lizhi,
>
> For all these functions, the "pdev" parameter is actually unused.
>
> [snip]
Ok. I will remove unused pdev.
>
>> +
>> +static int of_pci_prop_compatible(struct pci_dev *pdev,
>> + struct of_changeset *ocs,
>> + struct device_node *np)
>> +{
>> + const char *compat_strs[PROP_COMPAT_NUM] = { 0 };
>> + int i, ret;
>> +
>> + compat_strs[PROP_COMPAT_PCI_VVVV_DDDD] =
>> + kasprintf(GFP_KERNEL, "pci%x,%x", pdev->vendor, pdev->device);
> Maybe it should be better to use "pci%04x,%04x" to keep the existing
> naming.

Based on
https://www.devicetree.org/open-firmware/bindings/pci/pci2_1.pdf,
"pci%x,%x" should be used?

"name" Based on the PCI Class Code register, pick a name from Table 1.
If none apply, generate a name of the
form pciVVVV,DDDD as described below under "compatible".

VVVV, DDDD, SSSS, ssss and RR are lower-case ASCII hexadecimal numbers
without leading zeroes.


Thanks,

Lizhi

>

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