On Wed, Oct 16, 2019 at 03:06:28PM -0500, Rob Herring wrote:
> Convert the Faraday host bridge to use the common
> pci_parse_request_of_pci_ranges().
>
> There's no need to assign the resources to a temporary list first. Just
> use bridge->windows directly and remove all the temporary list handling.
>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> Cc: Andrew Murray <andrew.murray@xxxxxxx>
> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
> ---
> v2:
> - New patch
>
Reviewed-by: Andrew Murray <andrew.murray@xxxxxxx>
> drivers/pci/controller/pci-ftpci100.c | 51 ++++++---------------------
> 1 file changed, 11 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/pci/controller/pci-ftpci100.c b/drivers/pci/controller/pci-ftpci100.c
> index bf5ece5d9291..12bc7daef5b5 100644
> --- a/drivers/pci/controller/pci-ftpci100.c
> +++ b/drivers/pci/controller/pci-ftpci100.c
> @@ -430,10 +430,8 @@ static int faraday_pci_probe(struct platform_device *pdev)
> const struct faraday_pci_variant *variant =
> of_device_get_match_data(dev);
> struct resource *regs;
> - resource_size_t io_base;
> struct resource_entry *win;
> struct faraday_pci *p;
> - struct resource *mem;
> struct resource *io;
> struct pci_host_bridge *host;
> struct clk *clk;
> @@ -441,7 +439,6 @@ static int faraday_pci_probe(struct platform_device *pdev)
> unsigned char cur_bus_speed = PCI_SPEED_33MHz;
> int ret;
> u32 val;
> - LIST_HEAD(res);
>
> host = devm_pci_alloc_host_bridge(dev, sizeof(*p));
> if (!host)
> @@ -480,44 +477,20 @@ static int faraday_pci_probe(struct platform_device *pdev)
> if (IS_ERR(p->base))
> return PTR_ERR(p->base);
>
> - ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
> - &res, &io_base);
> + ret = pci_parse_request_of_pci_ranges(dev, &host->windows, NULL);
> if (ret)
> return ret;
>
> - ret = devm_request_pci_bus_resources(dev, &res);
> - if (ret)
> - return ret;
> -
> - /* Get the I/O and memory ranges from DT */
> - resource_list_for_each_entry(win, &res) {
> - switch (resource_type(win->res)) {
> - case IORESOURCE_IO:
> - io = win->res;
> - io->name = "Gemini PCI I/O";
> - if (!faraday_res_to_memcfg(io->start - win->offset,
> - resource_size(io), &val)) {
> - /* setup I/O space size */
> - writel(val, p->base + PCI_IOSIZE);
> - } else {
> - dev_err(dev, "illegal IO mem size\n");
> - return -EINVAL;
> - }
> - ret = devm_pci_remap_iospace(dev, io, io_base);
> - if (ret) {
> - dev_warn(dev, "error %d: failed to map resource %pR\n",
> - ret, io);
> - continue;
> - }
> - break;
> - case IORESOURCE_MEM:
> - mem = win->res;
> - mem->name = "Gemini PCI MEM";
> - break;
> - case IORESOURCE_BUS:
> - break;
> - default:
> - break;
> + win = resource_list_get_entry_of_type(&host->windows, IORESOURCE_IO);
> + if (win) {
> + io = win->res;
> + if (!faraday_res_to_memcfg(io->start - win->offset,
> + resource_size(io), &val)) {
> + /* setup I/O space size */
> + writel(val, p->base + PCI_IOSIZE);
> + } else {
> + dev_err(dev, "illegal IO mem size\n");
> + return -EINVAL;
> }
> }
>
> @@ -569,7 +542,6 @@ static int faraday_pci_probe(struct platform_device *pdev)
> if (ret)
> return ret;
>
> - list_splice_init(&res, &host->windows);
> ret = pci_scan_root_bus_bridge(host);
> if (ret) {
> dev_err(dev, "failed to scan host: %d\n", ret);
> @@ -581,7 +553,6 @@ static int faraday_pci_probe(struct platform_device *pdev)
>
> pci_bus_assign_resources(p->bus);
> pci_bus_add_devices(p->bus);
> - pci_free_resource_list(&res);
>
> return 0;
> }
> --
> 2.20.1
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