Merge branch 'pci/host/mt7621'

- Add MediaTek MT7621 SoC PCIe host controller (moved from staging) (Sergio
  Paracuellos)

* pci/host/mt7621:
  MAINTAINERS: Add Sergio Paracuellos as MT7621 PCIe maintainer
  PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver
  dt-bindings: PCI: Add MT7621 SoC PCIe host controller

# Conflicts:
#	drivers/pci/controller/Kconfig
#	drivers/pci/controller/Makefile

12 files changed, 172 insertions, 134 deletions

diff --git a/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml b/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
new file mode 100644
index 000000000000..044fa967bc8b
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
@@ -0,0 +1,142 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/mediatek,mt7621-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT7621 PCIe controller
+
+maintainers:
+  - Sergio Paracuellos <sergio.paracuellos@gmail.com>
+
+description: |+
+  MediaTek MT7621 PCIe subsys supports a single Root Complex (RC)
+  with 3 Root Ports. Each Root Port supports a Gen1 1-lane Link
+
+allOf:
+  - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+  compatible:
+    const: mediatek,mt7621-pci
+
+  reg:
+    items:
+      - description: host-pci bridge registers
+      - description: pcie port 0 RC control registers
+      - description: pcie port 1 RC control registers
+      - description: pcie port 2 RC control registers
+
+  ranges:
+    maxItems: 2
+
+patternProperties:
+  'pcie@[0-2],0':
+    type: object
+    $ref: /schemas/pci/pci-bus.yaml#
+
+    properties:
+      resets:
+        maxItems: 1
+
+      clocks:
+        maxItems: 1
+
+      phys:
+        maxItems: 1
+
+    required:
+      - "#interrupt-cells"
+      - interrupt-map-mask
+      - interrupt-map
+      - resets
+      - clocks
+      - phys
+      - phy-names
+      - ranges
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - ranges
+  - "#interrupt-cells"
+  - interrupt-map-mask
+  - interrupt-map
+  - reset-gpios
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/mips-gic.h>
+
+    pcie: pcie@1e140000 {
+        compatible = "mediatek,mt7621-pci";
+        reg = <0x1e140000 0x100>,
+              <0x1e142000 0x100>,
+              <0x1e143000 0x100>,
+              <0x1e144000 0x100>;
+
+        #address-cells = <3>;
+        #size-cells = <2>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&pcie_pins>;
+        device_type = "pci";
+        ranges = <0x02000000 0 0x60000000 0x60000000 0 0x10000000>,  /* pci memory */
+                 <0x01000000 0 0x1e160000 0x1e160000 0 0x00010000>;  /* io space */
+        #interrupt-cells = <1>;
+        interrupt-map-mask = <0xF800 0 0 0>;
+        interrupt-map = <0x0000 0 0 0 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>,
+                        <0x0800 0 0 0 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>,
+                        <0x1000 0 0 0 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>;
+        reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>;
+
+        pcie@0,0 {
+            reg = <0x0000 0 0 0 0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            device_type = "pci";
+            #interrupt-cells = <1>;
+            interrupt-map-mask = <0 0 0 0>;
+            interrupt-map = <0 0 0 0 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>;
+            resets = <&rstctrl 24>;
+            clocks = <&clkctrl 24>;
+            phys = <&pcie0_phy 1>;
+            phy-names = "pcie-phy0";
+            ranges;
+        };
+
+        pcie@1,0 {
+            reg = <0x0800 0 0 0 0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            device_type = "pci";
+            #interrupt-cells = <1>;
+            interrupt-map-mask = <0 0 0 0>;
+            interrupt-map = <0 0 0 0 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>;
+            resets = <&rstctrl 25>;
+            clocks = <&clkctrl 25>;
+            phys = <&pcie0_phy 1>;
+            phy-names = "pcie-phy1";
+            ranges;
+        };
+
+        pcie@2,0 {
+            reg = <0x1000 0 0 0 0>;
+            #address-cells = <3>;
+            #size-cells = <2>;
+            device_type = "pci";
+            #interrupt-cells = <1>;
+            interrupt-map-mask = <0 0 0 0>;
+            interrupt-map = <0 0 0 0 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>;
+            resets = <&rstctrl 26>;
+            clocks = <&clkctrl 26>;
+            phys = <&pcie2_phy 0>;
+            phy-names = "pcie-phy2";
+            ranges;
+        };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 9ceee03723eb..ed1236ab2720 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11849,6 +11849,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/i2c/i2c-mt7621.txt
 F:	drivers/i2c/busses/i2c-mt7621.c
 
+MEDIATEK MT7621 PCIE CONTROLLER DRIVER
+M:	Sergio Paracuellos <sergio.paracuellos@gmail.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/pci/mediatek,mt7621-pcie.yaml
+F:	drivers/pci/controller/pcie-mt7621.c
+
 MEDIATEK MT7621 PHY PCI DRIVER
 M:	Sergio Paracuellos <sergio.paracuellos@gmail.com>
 S:	Maintained
diff --git a/arch/mips/ralink/Kconfig b/arch/mips/ralink/Kconfig
index c800bf5559b5..120adad51d6a 100644
--- a/arch/mips/ralink/Kconfig
+++ b/arch/mips/ralink/Kconfig
@@ -51,7 +51,8 @@ choice
 		select SYS_SUPPORTS_HIGHMEM
 		select MIPS_GIC
 		select CLKSRC_MIPS_GIC
-		select HAVE_PCI if PCI_MT7621
+		select HAVE_PCI
+		select PCI_DRIVERS_GENERIC
 		select SOC_BUS
 endchoice
 
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
index 5661d4a84832..18f1fa4bdf06 100644
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -330,6 +330,14 @@ config PCIE_APPLE
 
 	  If unsure, say Y if you have an Apple Silicon system.
 
+config PCIE_MT7621
+	tristate "MediaTek MT7621 PCIe Controller"
+	depends on (RALINK && SOC_MT7621) || (MIPS && COMPILE_TEST)
+	select PHY_MT7621_PCI
+	default SOC_MT7621
+	help
+	  This selects a driver for the MediaTek MT7621 PCIe Controller.
+
 source "drivers/pci/controller/dwc/Kconfig"
 source "drivers/pci/controller/mobiveil/Kconfig"
 source "drivers/pci/controller/cadence/Kconfig"
diff --git a/drivers/pci/controller/Makefile b/drivers/pci/controller/Makefile
index f9d40bad932c..37c8663de7fe 100644
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -38,6 +38,8 @@ obj-$(CONFIG_PCIE_BRCMSTB) += pcie-brcmstb.o
 obj-$(CONFIG_PCI_LOONGSON) += pci-loongson.o
 obj-$(CONFIG_PCIE_HISI_ERR) += pcie-hisi-error.o
 obj-$(CONFIG_PCIE_APPLE) += pcie-apple.o
+obj-$(CONFIG_PCIE_MT7621) += pcie-mt7621.o
+
 # pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
 obj-y				+= dwc/
 obj-y				+= mobiveil/
diff --git a/drivers/staging/mt7621-pci/pci-mt7621.c b/drivers/pci/controller/pcie-mt7621.c
index 6acfc94a16e7..f76dbca0ab32 100644
--- a/drivers/staging/mt7621-pci/pci-mt7621.c
+++ b/drivers/pci/controller/pcie-mt7621.c
@@ -30,18 +30,18 @@
 #include <linux/reset.h>
 #include <linux/sys_soc.h>
 
-/* MediaTek specific configuration registers */
+/* MediaTek-specific configuration registers */
 #define PCIE_FTS_NUM			0x70c
 #define PCIE_FTS_NUM_MASK		GENMASK(15, 8)
 #define PCIE_FTS_NUM_L0(x)		(((x) & 0xff) << 8)
 
 /* Host-PCI bridge registers */
 #define RALINK_PCI_PCICFG_ADDR		0x0000
-#define RALINK_PCI_PCIMSK_ADDR		0x000C
+#define RALINK_PCI_PCIMSK_ADDR		0x000c
 #define RALINK_PCI_CONFIG_ADDR		0x0020
 #define RALINK_PCI_CONFIG_DATA		0x0024
 #define RALINK_PCI_MEMBASE		0x0028
-#define RALINK_PCI_IOBASE		0x002C
+#define RALINK_PCI_IOBASE		0x002c
 
 /* PCIe RC control registers */
 #define RALINK_PCI_ID			0x0030
@@ -132,7 +132,7 @@ static inline void pcie_port_write(struct mt7621_pcie_port *port,
 static inline u32 mt7621_pci_get_cfgaddr(unsigned int bus, unsigned int slot,
 					 unsigned int func, unsigned int where)
 {
-	return (((where & 0xF00) >> 8) << 24) | (bus << 16) | (slot << 11) |
+	return (((where & 0xf00) >> 8) << 24) | (bus << 16) | (slot << 11) |
 		(func << 8) | (where & 0xfc) | 0x80000000;
 }
 
@@ -217,7 +217,7 @@ static int setup_cm_memory_region(struct pci_host_bridge *host)
 
 	entry = resource_list_first_type(&host->windows, IORESOURCE_MEM);
 	if (!entry) {
-		dev_err(dev, "Cannot get memory resource\n");
+		dev_err(dev, "cannot get memory resource\n");
 		return -EINVAL;
 	}
 
@@ -280,7 +280,7 @@ static int mt7621_pcie_parse_port(struct mt7621_pcie *pcie,
 	port->gpio_rst = devm_gpiod_get_index_optional(dev, "reset", slot,
 						       GPIOD_OUT_LOW);
 	if (IS_ERR(port->gpio_rst)) {
-		dev_err(dev, "Failed to get GPIO for PCIe%d\n", slot);
+		dev_err(dev, "failed to get GPIO for PCIe%d\n", slot);
 		err = PTR_ERR(port->gpio_rst);
 		goto remove_reset;
 	}
@@ -409,7 +409,7 @@ static int mt7621_pcie_init_ports(struct mt7621_pcie *pcie)
 
 		err = mt7621_pcie_init_port(port);
 		if (err) {
-			dev_err(dev, "Initiating port %d failed\n", slot);
+			dev_err(dev, "initializing port %d failed\n", slot);
 			list_del(&port->list);
 		}
 	}
@@ -476,7 +476,7 @@ static int mt7621_pcie_enable_ports(struct pci_host_bridge *host)
 
 	entry = resource_list_first_type(&host->windows, IORESOURCE_IO);
 	if (!entry) {
-		dev_err(dev, "Cannot get io resource\n");
+		dev_err(dev, "cannot get io resource\n");
 		return -EINVAL;
 	}
 
@@ -541,25 +541,25 @@ static int mt7621_pci_probe(struct platform_device *pdev)
 
 	err = mt7621_pcie_parse_dt(pcie);
 	if (err) {
-		dev_err(dev, "Parsing DT failed\n");
+		dev_err(dev, "parsing DT failed\n");
 		return err;
 	}
 
 	err = mt7621_pcie_init_ports(pcie);
 	if (err) {
-		dev_err(dev, "Nothing connected in virtual bridges\n");
+		dev_err(dev, "nothing connected in virtual bridges\n");
 		return 0;
 	}
 
 	err = mt7621_pcie_enable_ports(bridge);
 	if (err) {
-		dev_err(dev, "Error enabling pcie ports\n");
+		dev_err(dev, "error enabling pcie ports\n");
 		goto remove_resets;
 	}
 
 	err = setup_cm_memory_region(bridge);
 	if (err) {
-		dev_err(dev, "Error setting up iocu mem regions\n");
+		dev_err(dev, "error setting up iocu mem regions\n");
 		goto remove_resets;
 	}
 
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index e03627ad4460..59af251e7576 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -86,8 +86,6 @@ source "drivers/staging/vc04_services/Kconfig"
 
 source "drivers/staging/pi433/Kconfig"
 
-source "drivers/staging/mt7621-pci/Kconfig"
-
 source "drivers/staging/mt7621-dma/Kconfig"
 
 source "drivers/staging/ralink-gdma/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index c7f8d8d8dd11..76f413470bc8 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -33,7 +33,6 @@ obj-$(CONFIG_KS7010)		+= ks7010/
 obj-$(CONFIG_GREYBUS)		+= greybus/
 obj-$(CONFIG_BCM2835_VCHIQ)	+= vc04_services/
 obj-$(CONFIG_PI433)		+= pi433/
-obj-$(CONFIG_PCI_MT7621)	+= mt7621-pci/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-dma/
 obj-$(CONFIG_DMA_RALINK)	+= ralink-gdma/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-dts/
diff --git a/drivers/staging/mt7621-pci/Kconfig b/drivers/staging/mt7621-pci/Kconfig
deleted file mode 100644
index ce58042f2f21..000000000000
--- a/drivers/staging/mt7621-pci/Kconfig
+++ /dev/null
@@ -1,8 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-config PCI_MT7621
-	tristate "MediaTek MT7621 PCI Controller"
-	depends on RALINK
-	select PCI_DRIVERS_GENERIC
-	help
-	  This selects a driver for the MediaTek MT7621 PCI Controller.
-
diff --git a/drivers/staging/mt7621-pci/Makefile b/drivers/staging/mt7621-pci/Makefile
deleted file mode 100644
index f4e651cf7ce3..000000000000
--- a/drivers/staging/mt7621-pci/Makefile
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_PCI_MT7621)       += pci-mt7621.o
diff --git a/drivers/staging/mt7621-pci/TODO b/drivers/staging/mt7621-pci/TODO
deleted file mode 100644
index d674a9ac85c1..000000000000
--- a/drivers/staging/mt7621-pci/TODO
+++ /dev/null
@@ -1,4 +0,0 @@
-
-- general code review and cleanup
-
-Cc: NeilBrown <neil@brown.name>
diff --git a/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt b/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt
deleted file mode 100644
index 327a68267309..000000000000
--- a/drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt
+++ /dev/null
@@ -1,104 +0,0 @@
-MediaTek MT7621 PCIe controller
-
-Required properties:
-- compatible: "mediatek,mt7621-pci"
-- device_type: Must be "pci"
-- reg: Base addresses and lengths of the PCIe subsys and root ports.
-- bus-range: Range of bus numbers associated with this controller.
-- #address-cells: Address representation for root ports (must be 3)
-- pinctrl-names : The pin control state names.
-- pinctrl-0: The "default" pinctrl state.
-- #size-cells: Size representation for root ports (must be 2)
-- ranges: Ranges for the PCI memory and I/O regions.
-- #interrupt-cells: Must be 1
-- interrupt-map-mask and interrupt-map: Standard PCI IRQ mapping properties.
-  Please refer to the standard PCI bus binding document for a more detailed
-  explanation.
-- status: either "disabled" or "okay".
-- resets: Must contain an entry for each entry in reset-names.
-  See ../reset/reset.txt for details.
-- reset-names: Must be "pcie0", "pcie1", "pcieN"... based on the number of
-  root ports.
-- clocks: Must contain an entry for each entry in clock-names.
-  See ../clocks/clock-bindings.txt for details.
-- clock-names: Must be "pcie0", "pcie1", "pcieN"... based on the number of
-  root ports.
-- reset-gpios: GPIO specs for the reset pins.
-
-In addition, the device tree node must have sub-nodes describing each PCIe port
-interface, having the following mandatory properties:
-
-Required properties:
-- reg: Only the first four bytes are used to refer to the correct bus number
-      and device number.
-- #address-cells: Must be 3
-- #size-cells: Must be 2
-- ranges: Sub-ranges distributed from the PCIe controller node. An empty
-  property is sufficient.
-- bus-range: Range of bus numbers associated with this port.
-
-Example for MT7621:
-
-	pcie: pcie@1e140000 {
-		compatible = "mediatek,mt7621-pci";
-        reg = <0x1e140000 0x100    /* host-pci bridge registers */
-               0x1e142000 0x100    /* pcie port 0 RC control registers */
-               0x1e143000 0x100    /* pcie port 1 RC control registers */
-               0x1e144000 0x100>;  /* pcie port 2 RC control registers */
-
-		#address-cells = <3>;
-		#size-cells = <2>;
-
-		pinctrl-names = "default";
-		pinctrl-0 = <&pcie_pins>;
-
-		device_type = "pci";
-
-		bus-range = <0 255>;
-		ranges = <
-			0x02000000 0 0x00000000 0x60000000 0 0x10000000 /* pci memory */
-			0x01000000 0 0x00000000 0x1e160000 0 0x00010000 /* io space */
-		>;
-
-		#interrupt-cells = <1>;
-		interrupt-map-mask = <0xF0000 0 0 1>;
-		interrupt-map = <0x10000 0 0 1 &gic GIC_SHARED 4 IRQ_TYPE_LEVEL_HIGH>,
-				<0x20000 0 0 1 &gic GIC_SHARED 24 IRQ_TYPE_LEVEL_HIGH>,
-				<0x30000 0 0 1 &gic GIC_SHARED 25 IRQ_TYPE_LEVEL_HIGH>;
-
-		status = "disabled";
-
-		resets = <&rstctrl 24 &rstctrl 25 &rstctrl 26>;
-		reset-names = "pcie0", "pcie1", "pcie2";
-		clocks = <&clkctrl 24 &clkctrl 25 &clkctrl 26>;
-		clock-names = "pcie0", "pcie1", "pcie2";
-
-		reset-gpios = <&gpio 19 GPIO_ACTIVE_LOW>,
-				<&gpio 8 GPIO_ACTIVE_LOW>,
-				<&gpio 7 GPIO_ACTIVE_LOW>;
-
-		pcie@0,0 {
-			reg = <0x0000 0 0 0 0>;
-			#address-cells = <3>;
-			#size-cells = <2>;
-			ranges;
-			bus-range = <0x00 0xff>;
-		};
-
-		pcie@1,0 {
-			reg = <0x0800 0 0 0 0>;
-			#address-cells = <3>;
-			#size-cells = <2>;
-			ranges;
-			bus-range = <0x00 0xff>;
-		};
-
-		pcie@2,0 {
-			reg = <0x1000 0 0 0 0>;
-			#address-cells = <3>;
-			#size-cells = <2>;
-			ranges;
-			bus-range = <0x00 0xff>;
-		};
-	};
-