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-rw-r--r--arch/arm/kernel/bios32.c12
-rw-r--r--drivers/edac/i82875p_edac.c8
-rw-r--r--drivers/pci/bus.c10
-rw-r--r--drivers/pci/host/pci-exynos.c7
-rw-r--r--drivers/pci/host/pci-imx6.c147
-rw-r--r--drivers/pci/host/pcie-designware.c6
-rw-r--r--drivers/pci/host/pcie-designware.h2
-rw-r--r--drivers/pci/iov.c2
-rw-r--r--drivers/platform/x86/asus-wmi.c3
-rw-r--r--drivers/platform/x86/eeepc-laptop.c3
-rw-r--r--include/linux/pci.h2
11 files changed, 83 insertions, 119 deletions
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 16d43cd45619..17a26c17f7f5 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -545,6 +545,18 @@ void pci_common_init_dev(struct device *parent, struct hw_pci *hw)
*/
pci_bus_add_devices(bus);
}
+
+ list_for_each_entry(sys, &head, node) {
+ struct pci_bus *bus = sys->bus;
+
+ /* Configure PCI Express settings */
+ if (bus && !pci_has_flag(PCI_PROBE_ONLY)) {
+ struct pci_bus *child;
+
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+ }
+ }
}
#ifndef CONFIG_PCI_HOST_ITE8152
diff --git a/drivers/edac/i82875p_edac.c b/drivers/edac/i82875p_edac.c
index 8d0450b9b9af..64b68320249f 100644
--- a/drivers/edac/i82875p_edac.c
+++ b/drivers/edac/i82875p_edac.c
@@ -275,7 +275,6 @@ static int i82875p_setup_overfl_dev(struct pci_dev *pdev,
{
struct pci_dev *dev;
void __iomem *window;
- int err;
*ovrfl_pdev = NULL;
*ovrfl_window = NULL;
@@ -293,13 +292,8 @@ static int i82875p_setup_overfl_dev(struct pci_dev *pdev,
if (dev == NULL)
return 1;
- err = pci_bus_add_device(dev);
- if (err) {
- i82875p_printk(KERN_ERR,
- "%s(): pci_bus_add_device() Failed\n",
- __func__);
- }
pci_bus_assign_resources(dev->bus);
+ pci_bus_add_device(dev);
}
*ovrfl_pdev = dev;
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index ba2bf55a38df..447d393725e1 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -235,7 +235,7 @@ void __weak pcibios_resource_survey_bus(struct pci_bus *bus) { }
*
* This adds add sysfs entries and start device drivers
*/
-int pci_bus_add_device(struct pci_dev *dev)
+void pci_bus_add_device(struct pci_dev *dev)
{
int retval;
@@ -252,8 +252,6 @@ int pci_bus_add_device(struct pci_dev *dev)
WARN_ON(retval < 0);
dev->is_added = 1;
-
- return 0;
}
/**
@@ -266,16 +264,12 @@ void pci_bus_add_devices(const struct pci_bus *bus)
{
struct pci_dev *dev;
struct pci_bus *child;
- int retval;
list_for_each_entry(dev, &bus->devices, bus_list) {
/* Skip already-added devices */
if (dev->is_added)
continue;
- retval = pci_bus_add_device(dev);
- if (retval)
- dev_err(&dev->dev, "Error adding device (%d)\n",
- retval);
+ pci_bus_add_device(dev);
}
list_for_each_entry(dev, &bus->devices, bus_list) {
diff --git a/drivers/pci/host/pci-exynos.c b/drivers/pci/host/pci-exynos.c
index 81aa700a8ada..1632661c5b7f 100644
--- a/drivers/pci/host/pci-exynos.c
+++ b/drivers/pci/host/pci-exynos.c
@@ -415,9 +415,7 @@ static irqreturn_t exynos_pcie_msi_irq_handler(int irq, void *arg)
{
struct pcie_port *pp = arg;
- dw_handle_msi_irq(pp);
-
- return IRQ_HANDLED;
+ return dw_handle_msi_irq(pp);
}
static void exynos_pcie_msi_init(struct pcie_port *pp)
@@ -511,7 +509,8 @@ static struct pcie_host_ops exynos_pcie_host_ops = {
.host_init = exynos_pcie_host_init,
};
-static int add_pcie_port(struct pcie_port *pp, struct platform_device *pdev)
+static int __init add_pcie_port(struct pcie_port *pp,
+ struct platform_device *pdev)
{
int ret;
diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c
index ee082509b0ba..a5645ae4aef0 100644
--- a/drivers/pci/host/pci-imx6.c
+++ b/drivers/pci/host/pci-imx6.c
@@ -25,6 +25,7 @@
#include <linux/resource.h>
#include <linux/signal.h>
#include <linux/types.h>
+#include <linux/interrupt.h>
#include "pcie-designware.h"
@@ -32,13 +33,9 @@
struct imx6_pcie {
int reset_gpio;
- int power_on_gpio;
- int wake_up_gpio;
- int disable_gpio;
- struct clk *lvds_gate;
- struct clk *sata_ref_100m;
- struct clk *pcie_ref_125m;
- struct clk *pcie_axi;
+ struct clk *pcie_bus;
+ struct clk *pcie_phy;
+ struct clk *pcie;
struct pcie_port pp;
struct regmap *iomuxc_gpr;
void __iomem *mem_base;
@@ -231,36 +228,27 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp)
struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp);
int ret;
- if (gpio_is_valid(imx6_pcie->power_on_gpio))
- gpio_set_value(imx6_pcie->power_on_gpio, 1);
-
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
IMX6Q_GPR1_PCIE_TEST_PD, 0 << 18);
regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
IMX6Q_GPR1_PCIE_REF_CLK_EN, 1 << 16);
- ret = clk_prepare_enable(imx6_pcie->sata_ref_100m);
- if (ret) {
- dev_err(pp->dev, "unable to enable sata_ref_100m\n");
- goto err_sata_ref;
- }
-
- ret = clk_prepare_enable(imx6_pcie->pcie_ref_125m);
+ ret = clk_prepare_enable(imx6_pcie->pcie_phy);
if (ret) {
- dev_err(pp->dev, "unable to enable pcie_ref_125m\n");
- goto err_pcie_ref;
+ dev_err(pp->dev, "unable to enable pcie_phy clock\n");
+ goto err_pcie_phy;
}
- ret = clk_prepare_enable(imx6_pcie->lvds_gate);
+ ret = clk_prepare_enable(imx6_pcie->pcie_bus);
if (ret) {
- dev_err(pp->dev, "unable to enable lvds_gate\n");
- goto err_lvds_gate;
+ dev_err(pp->dev, "unable to enable pcie_bus clock\n");
+ goto err_pcie_bus;
}
- ret = clk_prepare_enable(imx6_pcie->pcie_axi);
+ ret = clk_prepare_enable(imx6_pcie->pcie);
if (ret) {
- dev_err(pp->dev, "unable to enable pcie_axi\n");
- goto err_pcie_axi;
+ dev_err(pp->dev, "unable to enable pcie clock\n");
+ goto err_pcie;
}
/* allow the clocks to stabilize */
@@ -274,13 +262,11 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp)
}
return 0;
-err_pcie_axi:
- clk_disable_unprepare(imx6_pcie->lvds_gate);
-err_lvds_gate:
- clk_disable_unprepare(imx6_pcie->pcie_ref_125m);
-err_pcie_ref:
- clk_disable_unprepare(imx6_pcie->sata_ref_100m);
-err_sata_ref:
+err_pcie:
+ clk_disable_unprepare(imx6_pcie->pcie_bus);
+err_pcie_bus:
+ clk_disable_unprepare(imx6_pcie->pcie_phy);
+err_pcie_phy:
return ret;
}
@@ -329,6 +315,13 @@ static int imx6_pcie_wait_for_link(struct pcie_port *pp)
return 0;
}
+static irqreturn_t imx6_pcie_msi_handler(int irq, void *arg)
+{
+ struct pcie_port *pp = arg;
+
+ return dw_handle_msi_irq(pp);
+}
+
static int imx6_pcie_start_link(struct pcie_port *pp)
{
struct imx6_pcie *imx6_pcie = to_imx6_pcie(pp);
@@ -403,6 +396,9 @@ static void imx6_pcie_host_init(struct pcie_port *pp)
dw_pcie_setup_rc(pp);
imx6_pcie_start_link(pp);
+
+ if (IS_ENABLED(CONFIG_PCI_MSI))
+ dw_pcie_msi_init(pp);
}
static void imx6_pcie_reset_phy(struct pcie_port *pp)
@@ -487,15 +483,25 @@ static struct pcie_host_ops imx6_pcie_host_ops = {
.host_init = imx6_pcie_host_init,
};
-static int imx6_add_pcie_port(struct pcie_port *pp,
+static int __init imx6_add_pcie_port(struct pcie_port *pp,
struct platform_device *pdev)
{
int ret;
- pp->irq = platform_get_irq(pdev, 0);
- if (!pp->irq) {
- dev_err(&pdev->dev, "failed to get irq\n");
- return -ENODEV;
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ pp->msi_irq = platform_get_irq_byname(pdev, "msi");
+ if (pp->msi_irq <= 0) {
+ dev_err(&pdev->dev, "failed to get MSI irq\n");
+ return -ENODEV;
+ }
+
+ ret = devm_request_irq(&pdev->dev, pp->msi_irq,
+ imx6_pcie_msi_handler,
+ IRQF_SHARED, "mx6-pcie-msi", pp);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request MSI irq\n");
+ return -ENODEV;
+ }
}
pp->root_bus_nr = -1;
@@ -546,69 +552,26 @@ static int __init imx6_pcie_probe(struct platform_device *pdev)
}
}
- imx6_pcie->power_on_gpio = of_get_named_gpio(np, "power-on-gpio", 0);
- if (gpio_is_valid(imx6_pcie->power_on_gpio)) {
- ret = devm_gpio_request_one(&pdev->dev,
- imx6_pcie->power_on_gpio,
- GPIOF_OUT_INIT_LOW,
- "PCIe power enable");
- if (ret) {
- dev_err(&pdev->dev, "unable to get power-on gpio\n");
- return ret;
- }
- }
-
- imx6_pcie->wake_up_gpio = of_get_named_gpio(np, "wake-up-gpio", 0);
- if (gpio_is_valid(imx6_pcie->wake_up_gpio)) {
- ret = devm_gpio_request_one(&pdev->dev,
- imx6_pcie->wake_up_gpio,
- GPIOF_IN,
- "PCIe wake up");
- if (ret) {
- dev_err(&pdev->dev, "unable to get wake-up gpio\n");
- return ret;
- }
- }
-
- imx6_pcie->disable_gpio = of_get_named_gpio(np, "disable-gpio", 0);
- if (gpio_is_valid(imx6_pcie->disable_gpio)) {
- ret = devm_gpio_request_one(&pdev->dev,
- imx6_pcie->disable_gpio,
- GPIOF_OUT_INIT_HIGH,
- "PCIe disable endpoint");
- if (ret) {
- dev_err(&pdev->dev, "unable to get disable-ep gpio\n");
- return ret;
- }
- }
-
/* Fetch clocks */
- imx6_pcie->lvds_gate = devm_clk_get(&pdev->dev, "lvds_gate");
- if (IS_ERR(imx6_pcie->lvds_gate)) {
- dev_err(&pdev->dev,
- "lvds_gate clock select missing or invalid\n");
- return PTR_ERR(imx6_pcie->lvds_gate);
- }
-
- imx6_pcie->sata_ref_100m = devm_clk_get(&pdev->dev, "sata_ref_100m");
- if (IS_ERR(imx6_pcie->sata_ref_100m)) {
+ imx6_pcie->pcie_phy = devm_clk_get(&pdev->dev, "pcie_phy");
+ if (IS_ERR(imx6_pcie->pcie_phy)) {
dev_err(&pdev->dev,
- "sata_ref_100m clock source missing or invalid\n");
- return PTR_ERR(imx6_pcie->sata_ref_100m);
+ "pcie_phy clock source missing or invalid\n");
+ return PTR_ERR(imx6_pcie->pcie_phy);
}
- imx6_pcie->pcie_ref_125m = devm_clk_get(&pdev->dev, "pcie_ref_125m");
- if (IS_ERR(imx6_pcie->pcie_ref_125m)) {
+ imx6_pcie->pcie_bus = devm_clk_get(&pdev->dev, "pcie_bus");
+ if (IS_ERR(imx6_pcie->pcie_bus)) {
dev_err(&pdev->dev,
- "pcie_ref_125m clock source missing or invalid\n");
- return PTR_ERR(imx6_pcie->pcie_ref_125m);
+ "pcie_bus clock source missing or invalid\n");
+ return PTR_ERR(imx6_pcie->pcie_bus);
}
- imx6_pcie->pcie_axi = devm_clk_get(&pdev->dev, "pcie_axi");
- if (IS_ERR(imx6_pcie->pcie_axi)) {
+ imx6_pcie->pcie = devm_clk_get(&pdev->dev, "pcie");
+ if (IS_ERR(imx6_pcie->pcie)) {
dev_err(&pdev->dev,
- "pcie_axi clock source missing or invalid\n");
- return PTR_ERR(imx6_pcie->pcie_axi);
+ "pcie clock source missing or invalid\n");
+ return PTR_ERR(imx6_pcie->pcie);
}
/* Grab GPR config register range */
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 509a29d84509..77a649dd1473 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -155,15 +155,17 @@ static struct irq_chip dw_msi_irq_chip = {
};
/* MSI int handler */
-void dw_handle_msi_irq(struct pcie_port *pp)
+irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
{
unsigned long val;
int i, pos, irq;
+ irqreturn_t ret = IRQ_NONE;
for (i = 0; i < MAX_MSI_CTRLS; i++) {
dw_pcie_rd_own_conf(pp, PCIE_MSI_INTR0_STATUS + i * 12, 4,
(u32 *)&val);
if (val) {
+ ret = IRQ_HANDLED;
pos = 0;
while ((pos = find_next_bit(&val, 32, pos)) != 32) {
irq = irq_find_mapping(pp->irq_domain,
@@ -176,6 +178,8 @@ void dw_handle_msi_irq(struct pcie_port *pp)
}
}
}
+
+ return ret;
}
void dw_pcie_msi_init(struct pcie_port *pp)
diff --git a/drivers/pci/host/pcie-designware.h b/drivers/pci/host/pcie-designware.h
index 3063b3594d88..a169d22d517e 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -68,7 +68,7 @@ struct pcie_host_ops {
int dw_pcie_cfg_read(void __iomem *addr, int where, int size, u32 *val);
int dw_pcie_cfg_write(void __iomem *addr, int where, int size, u32 val);
-void dw_handle_msi_irq(struct pcie_port *pp);
+irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
void dw_pcie_msi_init(struct pcie_port *pp);
int dw_pcie_link_up(struct pcie_port *pp);
void dw_pcie_setup_rc(struct pcie_port *pp);
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index de7a74782f92..cb6f24740ee3 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -106,7 +106,7 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset)
pci_device_add(virtfn, virtfn->bus);
mutex_unlock(&iov->dev->sriov->lock);
- rc = pci_bus_add_device(virtfn);
+ pci_bus_add_device(virtfn);
sprintf(buf, "virtfn%u", id);
rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
if (rc)
diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index c5e082fb82fa..91ef69a52263 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -642,8 +642,7 @@ static void asus_rfkill_hotplug(struct asus_wmi *asus)
dev = pci_scan_single_device(bus, 0);
if (dev) {
pci_bus_assign_resources(bus);
- if (pci_bus_add_device(dev))
- pr_err("Unable to hotplug wifi\n");
+ pci_bus_add_device(dev);
}
} else {
dev = pci_get_slot(bus, 0);
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 399e8c562192..9b0c57cd1d4a 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -633,8 +633,7 @@ static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
dev = pci_scan_single_device(bus, 0);
if (dev) {
pci_bus_assign_resources(bus);
- if (pci_bus_add_device(dev))
- pr_err("Unable to hotplug wifi\n");
+ pci_bus_add_device(dev);
}
} else {
dev = pci_get_slot(bus, 0);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 65f22e85612d..71d9673c1b2c 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -781,7 +781,7 @@ int pci_scan_slot(struct pci_bus *bus, int devfn);
struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
unsigned int pci_scan_child_bus(struct pci_bus *bus);
-int __must_check pci_bus_add_device(struct pci_dev *dev);
+void pci_bus_add_device(struct pci_dev *dev);
void pci_read_bridge_bases(struct pci_bus *child);
struct resource *pci_find_parent_resource(const struct pci_dev *dev,
struct resource *res);
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