[PATCH v5 3/5] PCI: designware: enhance dw_pcie_host_init() to support v3.65 DW hardware

Pratyush Anand pratyush.anand at st.com
Wed Jul 16 20:36:38 PDT 2014

On Thu, Jul 17, 2014 at 12:38:04AM +0800, Murali Karicheri wrote:
> keystone PCI controller is based on v3.65 designware hardware. This
> version differs from newer versions of the hardware in few functional
> areas discussed below that makes it necessary to change dw_pcie_host_init()
> to support v3.65 based PCI controller.
>  1. No support for ATU port. So any ATU specific resource handling code
>     is to be bypassed for v3.65 h/w.
>  2. MSI controller uses Application space to implement MSI and 32 MSI
>     interrupts are multiplexed over 8 IRQs to the host. Hence the code
>     to process MSI IRQ needs to be different. This patch allows platform
>     driver to provide its own irq_domain_ops ptr to irq_domain_add_linear()
>     through an API callback from the designware core driver.
>  3. MSI interrupt generation requires EP to write to the RC's application
>     register. So enhance the driver to allow setup of inbound access to
>     MSI irq register as a post scan bus API callback.
> Signed-off-by: Murali Karicheri <m-karicheri2 at ti.com>

Looks almost ok to me.

Reviewed-by: Pratyush Anand <pratyush.anand at st.com>

>  int __init dw_pcie_host_init(struct pcie_port *pp)
>  {
>  	struct device_node *np = pp->dev->of_node;
> -	struct of_pci_range range;
>  	struct of_pci_range_parser parser;
> +	struct of_pci_range range;

You may avoid moving the above line.


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