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Date: Fri, 21 Jul 2017 10:34:49 +0800
From: <honghui.zhang@...iatek.com>
To: <bhelgaas@...gle.com>, <robh@...enl.org>, <matthias.bgg@...il.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>, <linux-pci@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<yingjoe.chen@...iatek.com>, <eddie.huang@...iatek.com>,
<ryder.lee@...iatek.com>
CC: <honghui.zhang@...iatek.com>, <hongkun.cao@...iatek.com>,
<youlin.pei@...iatek.com>, <yong.wu@...iatek.com>,
<yt.shen@...iatek.com>, <sean.wang@...iatek.com>,
<xinping.qian@...iatek.com>
Subject: [PATCH 5/5] dt-bindings: PCI: add support for new generation controller
From: Ryder Lee <ryder.lee@...iatek.com>
Add support for MediaTek new generation controller and update related
properities.
Signed-off-by: Ryder Lee <ryder.lee@...iatek.com>
Signed-off-by: Honghui Zhang <honghui.zhang@...iatek.com>
---
.../devicetree/bindings/pci/mediatek-pcie.txt | 84 ++++++++++++++++++++--
1 file changed, 79 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie.txt b/Documentation/devicetree/bindings/pci/mediatek-pcie.txt
index 294f4a3..a1f3767 100644
--- a/Documentation/devicetree/bindings/pci/mediatek-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/mediatek-pcie.txt
@@ -4,17 +4,27 @@ Required properties:
- compatible: Should contain one of the following string:
"mediatek,mt7623-pcie"
"mediatek,mt2701-pcie"
+ "mediatek,generic-pcie-v2"
- device_type: Must be "pci"
-- reg: Base addresses and lengths of the PCIe controller.
+- reg: Base addresses and lengths of the PICe subsys and root ports.
+- reg-names: Names of the above areas to use during resource look-up.
- #address-cells: Address representation for root ports (must be 3)
- #size-cells: Size representation for root ports (must be 2)
- clocks: Must contain an entry for each entry in clock-names.
See ../clocks/clock-bindings.txt for details.
- clock-names: Must include the following entries:
- free_ck :for reference clock of PCIe subsys
- - sys_ck0 :for clock of Port0
- - sys_ck1 :for clock of Port1
- - sys_ck2 :for clock of Port2
+ - sys_ckN :transaction layer and data link layer clock
+ The "sys_ck" might be divided into the following parts in some v2 chips:
+ - ahb_ckN :AHB slave interface operating clock for CSR access and RC
+ initiated MMIO access
+ - axi_ckN :application layer MMIO channel operating clock
+ - aux_ckN :pe2_mac_bridge and pe2_mac_core operating clock when
+ pcie_mac_ck/pcie_pipe_ck is turned off
+ - obff_ckN :OBFF functional block operating clock
+ - pipe_ckN :pe2_mac_bridge and pe2_mac_core operating clock when
+ pcie_mac_ck/pcie_pipe_ck is turned off
+ where N starting from 0 to the maximum number of root ports.
- phys: List of PHY specifiers (used by generic PHY framework).
- phy-names : Must be "pcie-phy0", "pcie-phy1", "pcie-phyN".. based on the
number of PHYs as specified in *phys* property.
@@ -33,6 +43,9 @@ Required properties for MT7623/MT2701:
- reset-names: Must be "pcie-rst0", "pcie-rst1", "pcie-rstN".. based on the
number of root ports.
+Required properties for mediatek generic-pcie-v2:
+-interrupts: A list of interrupt outputs of the controller.
+
In addition, the device tree node must have sub-nodes describing each
PCIe port interface, having the following mandatory properties:
@@ -50,7 +63,7 @@ Required properties:
property is sufficient.
- num-lanes: Number of lanes to use for this port.
-Examples:
+Examples for mt7623:
hifsys: syscon@...00000 {
compatible = "mediatek,mt7623-hifsys",
@@ -68,6 +81,7 @@ Examples:
<0 0x1a142000 0 0x1000>, /* Port0 registers */
<0 0x1a143000 0 0x1000>, /* Port1 registers */
<0 0x1a144000 0 0x1000>; /* Port2 registers */
+ reg-names = "subsys", "port0", "port1", "port2";
#address-cells = <3>;
#size-cells = <2>;
#interrupt-cells = <1>;
@@ -127,3 +141,63 @@ Examples:
num-lanes = <1>;
};
};
+
+Examples for mt2712:
+ pcie: pcie@...1700000 {
+ compatible = "mediatek,generic-pcie-v2";
+ device_type = "pci";
+ reg = <0 0x11700000 0 0x1000>,
+ <0 0x112FF000 0 0x1000>;
+ reg-names = "port0", "port1";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&pericfg CLK_PERI_PCIE0>,
+ <&pericfg CLK_PERI_PCIE1>,
+ <&topckgen CLK_TOP_PE2_MAC_P0_SEL>,
+ <&topckgen CLK_TOP_PE2_MAC_P1_SEL>;
+ clock-names = "sys_ck0", "sys_ck1", "ahb0", "ahb1";
+ bus-range = <0x00 0xff>;
+ ranges = <0x82000000 0 0x20000000 0x0 0x20000000 0 0x10000000>;
+
+ pcie0: pcie@0,0 {
+ device_type = "pci";
+ reg = <0x0000 0 0 0 0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ ranges;
+ num-lanes = <1>;
+ interrupt-map-mask = <0 0 0 7>;
+ interrupt-map = <0 0 0 1 &pcie_intc0 0>,
+ <0 0 0 2 &pcie_intc0 1>,
+ <0 0 0 3 &pcie_intc0 2>,
+ <0 0 0 4 &pcie_intc0 3>;
+ pcie_intc0: interrupt-controller {
+ interrupt-controller;
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ };
+ };
+
+ pcie1: pcie@1,0 {
+ device_type = "pci";
+ reg = <0x0800 0 0 0 0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <1>;
+ ranges;
+ num-lanes = <1>;
+ interrupt-map-mask = <0 0 0 7>;
+ interrupt-map = <0 0 0 1 &pcie_intc1 0>,
+ <0 0 0 2 &pcie_intc1 1>,
+ <0 0 0 3 &pcie_intc1 2>,
+ <0 0 0 4 &pcie_intc1 3>;
+ pcie_intc1: interrupt-controller {
+ interrupt-controller;
+ #address-cells = <0>;
+ #interrupt-cells = <1>;
+ };
+ };
+ };
--
2.6.4
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