Re: [PATCH 2/5] PCI: st: Add Device Tree bindings for sti pcie
From: Pratyush Anand
Date: Sun Dec 21 2014 - 23:47:37 EST
On Wednesday 17 December 2014 04:04 PM, Gabriel FERNANDEZ wrote:
sti pcie is built around a Synopsis Designware PCIe IP.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@xxxxxxxxxx>
---
Documentation/devicetree/bindings/pci/st-pcie.txt | 53 +++++++++++++++++++++++
1 file changed, 53 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/st-pcie.txt
diff --git a/Documentation/devicetree/bindings/pci/st-pcie.txt b/Documentation/devicetree/bindings/pci/st-pcie.txt
new file mode 100644
index 0000000..bd3488f
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/st-pcie.txt
@@ -0,0 +1,53 @@
+STMicroelectronics STi PCIe controller
+
+This PCIe host controller is based on the Synopsis Designware PCIe IP
+and thus inherits all the common properties defined in designware-pcie.txt.
+
+Required properties:
+ - compatible: "st,stih407-pcie"
+ - reg: base address and length of the pcie controller, mem-window address
+ and length available to the controller.
+ - interrupts: A list of interrupt outputs of the controller.
+ - interrupt-names: Must include the following entries:
+ "msi": STi interrupt that is asserted when an MSI is received
+ - st,syscfg : should be a phandle of the syscfg node. Also contains syscfg
+ offset for IP configuration.
+ - resets, reset-names: the power-down and soft-reset lines of PCIe IP.
+ Associated names must be "powerdown" and "softreset".
+ - phys, phy-names: the phandle for the PHY device.
+ Associated name must be "pcie_phy"
+
+Optional properties:
+ - reset-gpio: a GPIO spec to define which pin is connected to the bus reset.
+
+Example:
+
+pcie0: pcie@9b00000 {
+ compatible = "st,stih407-pcie", "snps,dw-pcie";
+ device_type = "pci";
+ reg = <0x09b00000 0x4000>, /* dbi cntrl registers */
+ <0x2fff0000 0x00010000>, /* configuration space */
+ <0x40000000 0x80000000>; /* lmi mem window */
+ reg-names = "dbi", "config", "mem-window";
+ st,syscfg = <&syscfg_core 0xd8 0xe0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ ranges = <0x00000800 0 0x2fff0000 0x2fff0000 0 0x00010000 /* configuration space */
Pass it through reg property.
See: arch/arm/boot/dts/spear1310.dtsi or any other dw pcie's dtsi.
@Jingoo, Mohit: I would suggest following changes so that no upcoming
platform can add it through ranges.
diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
index 4fc03b7f1cee..f21570847d08 100644
--- a/arch/arm/boot/dts/imx6qdl.dtsi
+++ b/arch/arm/boot/dts/imx6qdl.dtsi
@@ -143,8 +143,7 @@
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
- ranges = <0x00000800 0 0x01f00000 0x01f00000 0
0x00080000 /* configuration space */
- 0x81000000 0 0 0x01f80000 0
0x00010000 /* downstream I/O */
+ ranges = 0x81000000 0 0 0x01f80000 0
0x00010000 /* downstream I/O */
0x82000000 0 0x01000000 0x01000000 0
0x00f00000>; /* non-prefetchable memory */
num-lanes = <1>;
interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
index 7a24fee1e7ae..72593a77455e 100644
--- a/arch/arm/boot/dts/imx6sx.dtsi
+++ b/arch/arm/boot/dts/imx6sx.dtsi
@@ -1197,14 +1197,14 @@
pcie: pcie@0x08000000 {
compatible = "fsl,imx6sx-pcie", "snps,dw-pcie";
- reg = <0x08ffc000 0x4000>; /* DBI */
+ reg = <0x08ffc000 0x4000>, /* DBI */
+ <0x08f00000 0x80000>;
+ reg-names = "dbi", "config";
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
- /* configuration space */
- ranges = <0x00000800 0 0x08f00000 0x08f00000 0
0x00080000
/* downstream I/O */
- 0x81000000 0 0 0x08f80000 0
0x00010000
+ ranges = 0x81000000 0 0 0x08f80000 0
0x00010000
/* non-prefetchable memory */
0x82000000 0 0x08000000 0x08000000 0
0x00f00000>;
num-lanes = <1>;
diff --git a/drivers/pci/host/pcie-designware.c
b/drivers/pci/host/pcie-designware.c
index df781cdf13c1..0b22b42e1ff9 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -409,19 +409,6 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
pp->mem_mod_base = of_read_number(parser.range -
parser.np +
na, ns);
}
- if (restype == 0) {
- of_pci_range_to_resource(&range, np, &pp->cfg);
- pp->cfg0_size = resource_size(&pp->cfg)/2;
- pp->cfg1_size = resource_size(&pp->cfg)/2;
- pp->cfg0_base = pp->cfg.start;
- pp->cfg1_base = pp->cfg.start + pp->cfg0_size;
-
- /* Find the untranslated configuration space
address */
- pp->cfg0_mod_base = of_read_number(parser.range -
- parser.np +
na, ns);
- pp->cfg1_mod_base = pp->cfg0_mod_base +
- pp->cfg0_size;
- }
}
ret = of_pci_parse_bus_range(np, &pp->busn);
Regards
Pratyush
+ 0x82000000 0 0x20000000 0x20000000 0 0x0FFF0000>; /* non-prefetchable memory */
+ num-lanes = <1>;
+ interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "msi";
+ #interrupt-cells = <1>;
+ interrupt-map-mask = <0 0 0 7>;
+ interrupt-map = <0 0 0 1 &intc GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>, /* INT A */
+ <0 0 0 2 &intc GIC_SPI 161 IRQ_TYPE_LEVEL_HIGH>, /* INT B */
+ <0 0 0 3 &intc GIC_SPI 162 IRQ_TYPE_LEVEL_HIGH>, /* INT C */
+ <0 0 0 4 &intc GIC_SPI 163 IRQ_TYPE_LEVEL_HIGH>; /* INT D */
+
+ resets = <&powerdown STIH407_PCIE0_POWERDOWN>,
+ <&softreset STIH407_PCIE0_SOFTRESET>;
+ reset-names = "powerdown",
+ "softreset";
+ phys = <&phy_port0 PHY_TYPE_PCIE>;
+ phy-names = "pcie_phy";
+};
--
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