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Merge branch 'remotes/lorenzo/pci/cadence'

Browse source 
- Make "cdns,max-outbound-regions" optional (Kishon Vijay Abraham I)

- Fix "ti,syscon-pcie-ctrl" DT property to take argument (Kishon Vijay
  Abraham I)

- Add TI J7200 host and endpoint mode DT bindings (Kishon Vijay Abraham I)

* remotes/lorenzo/pci/cadence:
  PCI: j721e: Get offset within "syscon" from "ti,syscon-pcie-ctrl" phandle arg
  dt-bindings: PCI: Add EP mode dt-bindings for TI's J7200 SoC
  dt-bindings: PCI: Add host mode dt-bindings for TI's J7200 SoC
  dt-bindings: pci: ti,j721e: Fix "ti,syscon-pcie-ctrl" to take argument
  PCI: cadence: Do not error if "cdns,max-outbound-regions" is not found
  dt-bindings: PCI: Make "cdns,max-outbound-regions" optional property
This commit is contained in:
Bjorn Helgaas 2020-12-15 15:11:11 -06:00
commit ee4871d010
6 changed files with 58 additions and 33 deletions
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3
Documentation/devicetree/bindings/pci/cdns-pcie-ep.yaml
View file

@ -20,7 +20,4 @@ properties:
maximum: 32
default: 32
required:
- cdns,max-outbound-regions
additionalProperties: true

23
Documentation/devicetree/bindings/pci/ti,j721e-pci-ep.yaml
View file

@ -15,8 +15,14 @@ allOf:
properties:
compatible:
enum:
- ti,j721e-pcie-ep
oneOf:
- description: PCIe EP controller in J7200
items:
- const: ti,j7200-pcie-ep
- const: ti,j721e-pcie-ep
- description: PCIe EP controller in J721E
items:
- const: ti,j721e-pcie-ep
reg:
maxItems: 4
@ -29,9 +35,12 @@ properties:
- const: mem
ti,syscon-pcie-ctrl:
description: Phandle to the SYSCON entry required for configuring PCIe mode
and link speed.
$ref: /schemas/types.yaml#/definitions/phandle
$ref: /schemas/types.yaml#/definitions/phandle-array
items:
- items:
- description: Phandle to the SYSCON entry
- description: pcie_ctrl register offset within SYSCON
description: Specifier for configuring PCIe mode and link speed.
power-domains:
maxItems: 1
@ -57,7 +66,6 @@ required:
- power-domains
- clocks
- clock-names
- cdns,max-outbound-regions
- dma-coherent
- max-functions
- phys
@ -80,13 +88,12 @@ examples:
<0x00 0x0d000000 0x00 0x00800000>,
<0x00 0x10000000 0x00 0x08000000>;
reg-names = "intd_cfg", "user_cfg", "reg", "mem";
ti,syscon-pcie-ctrl = <&pcie0_ctrl>;
ti,syscon-pcie-ctrl = <&pcie0_ctrl 0x4070>;
max-link-speed = <3>;
num-lanes = <2>;
power-domains = <&k3_pds 239 TI_SCI_PD_EXCLUSIVE>;
clocks = <&k3_clks 239 1>;
clock-names = "fck";
cdns,max-outbound-regions = <16>;
max-functions = /bits/ 8 <6>;
dma-coherent;
phys = <&serdes0_pcie_link>;

27
Documentation/devicetree/bindings/pci/ti,j721e-pci-host.yaml
View file

@ -15,8 +15,14 @@ allOf:
properties:
compatible:
enum:
- ti,j721e-pcie-host
oneOf:
- description: PCIe controller in J7200
items:
- const: ti,j7200-pcie-host
- const: ti,j721e-pcie-host
- description: PCIe controller in J721E
items:
- const: ti,j721e-pcie-host
reg:
maxItems: 4
@ -29,9 +35,12 @@ properties:
- const: cfg
ti,syscon-pcie-ctrl:
description: Phandle to the SYSCON entry required for configuring PCIe mode
and link speed.
$ref: /schemas/types.yaml#/definitions/phandle
$ref: /schemas/types.yaml#/definitions/phandle-array
items:
- items:
- description: Phandle to the SYSCON entry
- description: pcie_ctrl register offset within SYSCON
description: Specifier for configuring PCIe mode and link speed.
power-domains:
maxItems: 1
@ -48,7 +57,11 @@ properties:
const: 0x104c
device-id:
const: 0xb00d
oneOf:
- items:
- const: 0xb00d
- items:
- const: 0xb00f
msi-map: true
@ -90,7 +103,7 @@ examples:
<0x00 0x0d000000 0x00 0x00800000>,
<0x00 0x10000000 0x00 0x00001000>;
reg-names = "intd_cfg", "user_cfg", "reg", "cfg";
ti,syscon-pcie-ctrl = <&pcie0_ctrl>;
ti,syscon-pcie-ctrl = <&pcie0_ctrl 0x4070>;
max-link-speed = <3>;
num-lanes = <2>;
power-domains = <&k3_pds 239 TI_SCI_PD_EXCLUSIVE>;

28
drivers/pci/controller/cadence/pci-j721e.c
View file

@ -12,6 +12,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pci.h>
@ -153,7 +154,8 @@ static const struct cdns_pcie_ops j721e_pcie_ops = {
.link_up = j721e_pcie_link_up,
};
static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon)
static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon,
unsigned int offset)
{
struct device *dev = pcie->dev;
u32 mask = J721E_MODE_RC;
@ -164,7 +166,7 @@ static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon)
if (mode == PCI_MODE_RC)
val = J721E_MODE_RC;
ret = regmap_update_bits(syscon, 0, mask, val);
ret = regmap_update_bits(syscon, offset, mask, val);
if (ret)
dev_err(dev, "failed to set pcie mode\n");
@ -172,7 +174,7 @@ static int j721e_pcie_set_mode(struct j721e_pcie *pcie, struct regmap *syscon)
}
static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
struct regmap *syscon)
struct regmap *syscon, unsigned int offset)
{
struct device *dev = pcie->dev;
struct device_node *np = dev->of_node;
@ -185,7 +187,7 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
link_speed = 2;
val = link_speed - 1;
ret = regmap_update_bits(syscon, 0, GENERATION_SEL_MASK, val);
ret = regmap_update_bits(syscon, offset, GENERATION_SEL_MASK, val);
if (ret)
dev_err(dev, "failed to set link speed\n");
@ -193,7 +195,7 @@ static int j721e_pcie_set_link_speed(struct j721e_pcie *pcie,
}
static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie,
struct regmap *syscon)
struct regmap *syscon, unsigned int offset)
{
struct device *dev = pcie->dev;
u32 lanes = pcie->num_lanes;
@ -201,7 +203,7 @@ static int j721e_pcie_set_lane_count(struct j721e_pcie *pcie,
int ret;
val = LANE_COUNT(lanes - 1);
ret = regmap_update_bits(syscon, 0, LANE_COUNT_MASK, val);
ret = regmap_update_bits(syscon, offset, LANE_COUNT_MASK, val);
if (ret)
dev_err(dev, "failed to set link count\n");
@ -212,6 +214,8 @@ static int j721e_pcie_ctrl_init(struct j721e_pcie *pcie)
{
struct device *dev = pcie->dev;
struct device_node *node = dev->of_node;
struct of_phandle_args args;
unsigned int offset = 0;
struct regmap *syscon;
int ret;
@ -221,19 +225,25 @@ static int j721e_pcie_ctrl_init(struct j721e_pcie *pcie)
return PTR_ERR(syscon);
}
ret = j721e_pcie_set_mode(pcie, syscon);
/* Do not error out to maintain old DT compatibility */
ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-pcie-ctrl", 1,
0, &args);
if (!ret)
offset = args.args[0];
ret = j721e_pcie_set_mode(pcie, syscon, offset);
if (ret < 0) {
dev_err(dev, "Failed to set pci mode\n");
return ret;
}
ret = j721e_pcie_set_link_speed(pcie, syscon);
ret = j721e_pcie_set_link_speed(pcie, syscon, offset);
if (ret < 0) {
dev_err(dev, "Failed to set link speed\n");
return ret;
}
ret = j721e_pcie_set_lane_count(pcie, syscon);
ret = j721e_pcie_set_lane_count(pcie, syscon, offset);
if (ret < 0) {
dev_err(dev, "Failed to set num-lanes\n");
return ret;

9
drivers/pci/controller/cadence/pcie-cadence-ep.c
View file

@ -530,12 +530,9 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
}
pcie->mem_res = res;
ret = of_property_read_u32(np, "cdns,max-outbound-regions",
&ep->max_regions);
if (ret < 0) {
dev_err(dev, "missing \"cdns,max-outbound-regions\"\n");
return ret;
}
ep->max_regions = CDNS_PCIE_MAX_OB;
of_property_read_u32(np, "cdns,max-outbound-regions", &ep->max_regions);
ep->ob_addr = devm_kcalloc(dev,
ep->max_regions, sizeof(*ep->ob_addr),
GFP_KERNEL);

1
drivers/pci/controller/cadence/pcie-cadence.h
View file

@ -197,6 +197,7 @@ enum cdns_pcie_rp_bar {
};
#define CDNS_PCIE_RP_MAX_IB 0x3
#define CDNS_PCIE_MAX_OB 32
struct cdns_pcie_rp_ib_bar {
u64 size;