[PATCH 4/5] PCI: qcom: Add Qualcomm PCIe controller driver

Arnd Bergmann
2014-12-12T17:30:03Z

On Friday 12 December 2014 19:14:00 Stanimir Varbanov wrote:
> The PCIe driver reuse the Designware common code for host
> and MSI initialization, and also program the Qualcomm
> application specific registers.
>
> Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>

Looks nice!

> +static int
> +qcom_pcie_rd_own_conf(struct pcie_port *pp, int where, int size, u32 *val)
> +{
> + if (where == PCI_CLASS_REVISION && size == 4) {
> + *val = readl(pp->dbi_base + PCI_CLASS_REVISION);
> + *val &= ~(0xffff << 16);
> + *val |= PCI_CLASS_BRIDGE_PCI << 16;
> + return PCIBIOS_SUCCESSFUL;
> + }
> +
> + return dw_pcie_cfg_read(pp->dbi_base + (where & ~0x3), where,
> + size, val);
> +}

Could you add a comment here to explain what this is for?

> +static int __init qcom_pcie_probe(struct platform_device *pdev)
> +{

I think it's a bug to mark this function as __init. It breaks
deferred probing and detaching/reattaching the device trough sysfs.

After you fix that, you can remove the __refdata below.

> +static struct platform_driver __refdata qcom_pcie_driver = {
> + .probe = qcom_pcie_probe,
> + .remove = qcom_pcie_remove,
> + .driver = {
> + .name = "qcom-pcie",
> + .of_match_table = qcom_pcie_match,
> + },
> +};

Arnd