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pci-v4.9-fixes-3

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Merge tag 'pci-v4.9-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - Update MAINTAINERS for Intel VMD driver filename

 - Update Rockchip rk3399 host bridge driver DTS and resets

 - Fix ROM shadow problem that made some video device initialization
   fail

* tag 'pci-v4.9-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: VMD: Update filename to reflect move
  arm64: dts: rockchip: add three new resets for rk3399 PCIe controller
  PCI: rockchip: Add three new resets as required properties
  PCI: Don't attempt to claim shadow copies of ROM
This commit is contained in:
Linus Torvalds 2016-11-11 16:38:26 -08:00
commit 8233008f5d
5 changed files with 84 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

62
drivers/pci/host/pcie-rockchip.c
View file

@ -190,6 +190,9 @@ struct rockchip_pcie {
struct reset_control *mgmt_rst;
struct reset_control *mgmt_sticky_rst;
struct reset_control *pipe_rst;
struct reset_control *pm_rst;
struct reset_control *aclk_rst;
struct reset_control *pclk_rst;
struct clk *aclk_pcie;
struct clk *aclk_perf_pcie;
struct clk *hclk_pcie;
@ -408,6 +411,44 @@ static int rockchip_pcie_init_port(struct rockchip_pcie *rockchip)
gpiod_set_value(rockchip->ep_gpio, 0);
err = reset_control_assert(rockchip->aclk_rst);
if (err) {
dev_err(dev, "assert aclk_rst err %d\n", err);
return err;
}
err = reset_control_assert(rockchip->pclk_rst);
if (err) {
dev_err(dev, "assert pclk_rst err %d\n", err);
return err;
}
err = reset_control_assert(rockchip->pm_rst);
if (err) {
dev_err(dev, "assert pm_rst err %d\n", err);
return err;
}
udelay(10);
err = reset_control_deassert(rockchip->pm_rst);
if (err) {
dev_err(dev, "deassert pm_rst err %d\n", err);
return err;
}
err = reset_control_deassert(rockchip->aclk_rst);
if (err) {
dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
return err;
}
err = reset_control_deassert(rockchip->pclk_rst);
if (err) {
dev_err(dev, "deassert mgmt_sticky_rst err %d\n", err);
return err;
}
err = phy_init(rockchip->phy);
if (err < 0) {
dev_err(dev, "fail to init phy, err %d\n", err);
@ -781,6 +822,27 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
return PTR_ERR(rockchip->pipe_rst);
}
rockchip->pm_rst = devm_reset_control_get(dev, "pm");
if (IS_ERR(rockchip->pm_rst)) {
if (PTR_ERR(rockchip->pm_rst) != -EPROBE_DEFER)
dev_err(dev, "missing pm reset property in node\n");
return PTR_ERR(rockchip->pm_rst);
}
rockchip->pclk_rst = devm_reset_control_get(dev, "pclk");
if (IS_ERR(rockchip->pclk_rst)) {
if (PTR_ERR(rockchip->pclk_rst) != -EPROBE_DEFER)
dev_err(dev, "missing pclk reset property in node\n");
return PTR_ERR(rockchip->pclk_rst);
}
rockchip->aclk_rst = devm_reset_control_get(dev, "aclk");
if (IS_ERR(rockchip->aclk_rst)) {
if (PTR_ERR(rockchip->aclk_rst) != -EPROBE_DEFER)
dev_err(dev, "missing aclk reset property in node\n");
return PTR_ERR(rockchip->aclk_rst);
}
rockchip->ep_gpio = devm_gpiod_get(dev, "ep", GPIOD_OUT_HIGH);
if (IS_ERR(rockchip->ep_gpio)) {
dev_err(dev, "missing ep-gpios property in node\n");

8
drivers/pci/setup-res.c
View file

@ -121,6 +121,14 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
return -EINVAL;
}
/*
* If we have a shadow copy in RAM, the PCI device doesn't respond
* to the shadow range, so we don't need to claim it, and upstream
* bridges don't need to route the range to the device.
*/
if (res->flags & IORESOURCE_ROM_SHADOW)
return 0;
root = pci_find_parent_resource(dev, res);
if (!root) {
dev_info(&dev->dev, "can't claim BAR %d %pR: no compatible bridge window\n",