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pci-v5.0-fixes-3

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Merge tag 'pci-v5.0-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:

 - Revert armada8k GPIO reset change that broke Macchiatobin booting
   (Baruch Siach)

 - Use actual size config reads on ARM cns3xxx (Koen Vandeputte)

 - Fix ARM cns3xxx config write alignment issue (Koen Vandeputte)

 - Fix imx6 PHY device link error checking (Leonard Crestez)

 - Fix imx6 probe failure on chips without separate PCI power domain
   (Leonard Crestez)

* tag 'pci-v5.0-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  Revert "PCI: armada8k: Add support for gpio controlled reset signal"
  ARM: cns3xxx: Use actual size reads for PCIe
  ARM: cns3xxx: Fix writing to wrong PCI config registers after alignment
  PCI: imx: Fix checking pd_pcie_phy device link addition
  PCI: imx: Fix probe failure without power domain
This commit is contained in:
Linus Torvalds 2019-01-31 23:06:17 -08:00
commit 44e56f325b
3 changed files with 9 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/mach-cns3xxx/pcie.c
View File

@ -83,7 +83,7 @@ static void __iomem *cns3xxx_pci_map_bus(struct pci_bus *bus,
} else /* remote PCI bus */
base = cnspci->cfg1_regs + ((busno & 0xf) << 20);
return base + (where & 0xffc) + (devfn << 12);
return base + where + (devfn << 12);
}
static int cns3xxx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
@ -93,7 +93,7 @@ static int cns3xxx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
u32 mask = (0x1ull << (size * 8)) - 1;
int shift = (where % 4) * 8;
ret = pci_generic_config_read32(bus, devfn, where, size, val);
ret = pci_generic_config_read(bus, devfn, where, size, val);
if (ret == PCIBIOS_SUCCESSFUL && !bus->number && !devfn &&
(where & 0xffc) == PCI_CLASS_REVISION)

11
drivers/pci/controller/dwc/pci-imx6.c
View File

@ -310,6 +310,9 @@ static int imx6_pcie_attach_pd(struct device *dev)
imx6_pcie->pd_pcie = dev_pm_domain_attach_by_name(dev, "pcie");
if (IS_ERR(imx6_pcie->pd_pcie))
return PTR_ERR(imx6_pcie->pd_pcie);
/* Do nothing when power domain missing */
if (!imx6_pcie->pd_pcie)
return 0;
link = device_link_add(dev, imx6_pcie->pd_pcie,
DL_FLAG_STATELESS |
DL_FLAG_PM_RUNTIME |
@ -323,13 +326,13 @@ static int imx6_pcie_attach_pd(struct device *dev)
if (IS_ERR(imx6_pcie->pd_pcie_phy))
return PTR_ERR(imx6_pcie->pd_pcie_phy);
device_link_add(dev, imx6_pcie->pd_pcie_phy,
link = device_link_add(dev, imx6_pcie->pd_pcie_phy,
DL_FLAG_STATELESS |
DL_FLAG_PM_RUNTIME |
DL_FLAG_RPM_ACTIVE);
if (IS_ERR(link)) {
dev_err(dev, "Failed to add device_link to pcie_phy pd: %ld\n", PTR_ERR(link));
return PTR_ERR(link);
if (!link) {
dev_err(dev, "Failed to add device_link to pcie_phy pd.\n");
return -EINVAL;
}
return 0;

16
drivers/pci/controller/dwc/pcie-armada8k.c
View File

@ -22,7 +22,6 @@
#include <linux/resource.h>
#include <linux/of_pci.h>
#include <linux/of_irq.h>
#include <linux/gpio/consumer.h>
#include "pcie-designware.h"
@ -30,7 +29,6 @@ struct armada8k_pcie {
struct dw_pcie *pci;
struct clk *clk;
struct clk *clk_reg;
struct gpio_desc *reset_gpio;
};
#define PCIE_VENDOR_REGS_OFFSET 0x8000
@ -139,12 +137,6 @@ static int armada8k_pcie_host_init(struct pcie_port *pp)
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct armada8k_pcie *pcie = to_armada8k_pcie(pci);
if (pcie->reset_gpio) {
/* assert and then deassert the reset signal */
gpiod_set_value_cansleep(pcie->reset_gpio, 1);
msleep(100);
gpiod_set_value_cansleep(pcie->reset_gpio, 0);
}
dw_pcie_setup_rc(pp);
armada8k_pcie_establish_link(pcie);
@ -257,14 +249,6 @@ static int armada8k_pcie_probe(struct platform_device *pdev)
goto fail_clkreg;
}
/* Get reset gpio signal and hold asserted (logically high) */
pcie->reset_gpio = devm_gpiod_get_optional(dev, "reset",
GPIOD_OUT_HIGH);
if (IS_ERR(pcie->reset_gpio)) {
ret = PTR_ERR(pcie->reset_gpio);
goto fail_clkreg;
}
platform_set_drvdata(pdev, pcie);
ret = armada8k_add_pcie_port(pcie, pdev);