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authorBjorn Helgaas <bhelgaas@google.com>2021-09-02 22:56:49 +0300
committerBjorn Helgaas <bhelgaas@google.com>2021-09-02 22:56:49 +0300
commitc501cf9cbeacc4cf2dfb03a20d27c3661ddd9643 (patch)
tree1a2ec43e56bd20664e958e72b6bcea0c08f53f7c /drivers/pci/controller/pcie-mediatek.c
parentaf42a0d4a88b658e848d4c27732203a364788b2d (diff)
parent77216702c8f6288f948ee230772b4612b835c5d6 (diff)
downloadlinux-c501cf9cbeacc4cf2dfb03a20d27c3661ddd9643.tar.xz
Merge branch 'remotes/lorenzo/pci/mediatek'
- Split DT bindings for PCIe controllers with independent MSI domains into separate nodes for MT2712/MT7622 (Chuanjia Liu) - Locate shared registers from "mediatek,generic-pciecfg" property (Chuanjia Liu) - Get IRQ from "pcie_irq" if "interrupt-names" property is present to fix an MSI issue (Chuanjia Liu) - Get PCI domain from "linux,pci-domain" property if present (Chuanjia Liu) * remotes/lorenzo/pci/mediatek: PCI: mediatek: Use PCI domain to handle ports detection PCI: mediatek: Add new method to get irq number PCI: mediatek: Add new method to get shared pcie-cfg base address dt-bindings: PCI: mediatek: Update the Device tree bindings
Diffstat (limited to 'drivers/pci/controller/pcie-mediatek.c')
-rw-r--r--drivers/pci/controller/pcie-mediatek.c52
1 files changed, 39 insertions, 13 deletions
diff --git a/drivers/pci/controller/pcie-mediatek.c b/drivers/pci/controller/pcie-mediatek.c
index 4cb5ea8e1069..2f3f974977a3 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -14,6 +14,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
#include <linux/msi.h>
#include <linux/module.h>
#include <linux/of_address.h>
@@ -23,6 +24,7 @@
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
#include <linux/reset.h>
#include "../pci.h"
@@ -207,6 +209,7 @@ struct mtk_pcie_port {
* struct mtk_pcie - PCIe host information
* @dev: pointer to PCIe device
* @base: IO mapped register base
+ * @cfg: IO mapped register map for PCIe config
* @free_ck: free-run reference clock
* @mem: non-prefetchable memory resource
* @ports: pointer to PCIe port information
@@ -215,6 +218,7 @@ struct mtk_pcie_port {
struct mtk_pcie {
struct device *dev;
void __iomem *base;
+ struct regmap *cfg;
struct clk *free_ck;
struct list_head ports;
@@ -646,7 +650,11 @@ static int mtk_pcie_setup_irq(struct mtk_pcie_port *port,
return err;
}
- port->irq = platform_get_irq(pdev, port->slot);
+ if (of_find_property(dev->of_node, "interrupt-names", NULL))
+ port->irq = platform_get_irq_byname(pdev, "pcie_irq");
+ else
+ port->irq = platform_get_irq(pdev, port->slot);
+
if (port->irq < 0)
return port->irq;
@@ -678,6 +686,10 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port *port)
val |= PCIE_CSR_LTSSM_EN(port->slot) |
PCIE_CSR_ASPM_L1_EN(port->slot);
writel(val, pcie->base + PCIE_SYS_CFG_V2);
+ } else if (pcie->cfg) {
+ val = PCIE_CSR_LTSSM_EN(port->slot) |
+ PCIE_CSR_ASPM_L1_EN(port->slot);
+ regmap_update_bits(pcie->cfg, PCIE_SYS_CFG_V2, val, val);
}
/* Assert all reset signals */
@@ -981,6 +993,7 @@ static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
struct device *dev = pcie->dev;
struct platform_device *pdev = to_platform_device(dev);
struct resource *regs;
+ struct device_node *cfg_node;
int err;
/* get shared registers, which are optional */
@@ -991,6 +1004,14 @@ static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie)
return PTR_ERR(pcie->base);
}
+ cfg_node = of_find_compatible_node(NULL, NULL,
+ "mediatek,generic-pciecfg");
+ if (cfg_node) {
+ pcie->cfg = syscon_node_to_regmap(cfg_node);
+ if (IS_ERR(pcie->cfg))
+ return PTR_ERR(pcie->cfg);
+ }
+
pcie->free_ck = devm_clk_get(dev, "free_ck");
if (IS_ERR(pcie->free_ck)) {
if (PTR_ERR(pcie->free_ck) == -EPROBE_DEFER)
@@ -1023,22 +1044,27 @@ static int mtk_pcie_setup(struct mtk_pcie *pcie)
struct device *dev = pcie->dev;
struct device_node *node = dev->of_node, *child;
struct mtk_pcie_port *port, *tmp;
- int err;
+ int err, slot;
+
+ slot = of_get_pci_domain_nr(dev->of_node);
+ if (slot < 0) {
+ for_each_available_child_of_node(node, child) {
+ err = of_pci_get_devfn(child);
+ if (err < 0) {
+ dev_err(dev, "failed to get devfn: %d\n", err);
+ goto error_put_node;
+ }
- for_each_available_child_of_node(node, child) {
- int slot;
+ slot = PCI_SLOT(err);
- err = of_pci_get_devfn(child);
- if (err < 0) {
- dev_err(dev, "failed to parse devfn: %d\n", err);
- goto error_put_node;
+ err = mtk_pcie_parse_port(pcie, child, slot);
+ if (err)
+ goto error_put_node;
}
-
- slot = PCI_SLOT(err);
-
- err = mtk_pcie_parse_port(pcie, child, slot);
+ } else {
+ err = mtk_pcie_parse_port(pcie, node, slot);
if (err)
- goto error_put_node;
+ return err;
}
err = mtk_pcie_subsys_powerup(pcie);