Add support for PCIe controllers that operate in the endpoint mode
in tegra234 chipset.
Signed-off-by: Vidya Sagar <[email protected]>
---
V4:
* Rebased on top of previous patch
V3:
* New patch in this series
.../bindings/pci/nvidia,tegra194-pcie-ep.yaml | 123 +++++++++++++++++-
1 file changed, 117 insertions(+), 6 deletions(-)
diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml
index 98e2d40e876b..cffe8e8bec94 100644
--- a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml
+++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml
@@ -18,6 +18,7 @@ description: |
in root port mode or endpoint mode but one at a time.
On Tegra194, controllers C0, C4 and C5 support endpoint mode.
+ On Tegra234, controllers C5, C6, C7 and C10 support endpoint mode.
Note: On Tegra194's P2972-0000 platform, only C5 controller can be enabled to
operate in the endpoint mode because of the way the platform is designed.
@@ -26,6 +27,7 @@ properties:
compatible:
enum:
- nvidia,tegra194-pcie-ep
+ - nvidia,tegra234-pcie-ep
reg:
items:
@@ -96,7 +98,8 @@ properties:
A phandle to the node that controls power to the respective PCIe
controller and a specifier name for the PCIe controller.
- specifiers are defined in "include/dt-bindings/power/tegra194-powergate.h" file.
+ Tegra194 specifiers are defined in "include/dt-bindings/power/tegra194-powergate.h" file.
+ Tegra234 specifiers are defined in "include/dt-bindings/power/tegra234-powergate.h" file.
interconnects:
items:
@@ -116,17 +119,30 @@ properties:
Must contain a pair of phandle to BPMP controller node followed by
controller ID. Following are the controller IDs for each controller:
+ Tegra194
+
0: C0
1: C1
2: C2
3: C3
4: C4
5: C5
- items:
- - items:
- - description: phandle to BPMP controller node
- - description: PCIe controller ID
- maximum: 5
+
+ Tegra234
+
+ 0 : C0
+ 1 : C1
+ 2 : C2
+ 3 : C3
+ 4 : C4
+ 5 : C5
+ 6 : C6
+ 7 : C7
+ 8 : C8
+ 9 : C9
+ 10: C10
+
+ Platform constraints are described later
nvidia,aspm-cmrt-us:
description: Common Mode Restore Time for proper operation of ASPM to be
@@ -146,9 +162,47 @@ properties:
maxItems: 1
description: GPIO used to enable REFCLK to controller from the host
+ nvidia,enable-srns:
+ description: |
+ This boolean property needs to be present if the controller is configured
+ to operate in SRNS (Separate Reference Clocks with No Spread-Spectrum Clocking).
+ NOTE:- This is applicable only for Tegra234.
+
+ $ref: /schemas/types.yaml#/definitions/flag
+
allOf:
- $ref: /schemas/pci/pci-ep.yaml#
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - nvidia,tegra194-pcie
+ then:
+ properties:
+ nvidia,bpmp:
+ items:
+ - items:
+ - description: phandle to BPMP controller node
+ - description: PCIe controller ID
+ maximum: 5
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - nvidia,tegra234-pcie
+ then:
+ properties:
+ nvidia,bpmp:
+ items:
+ - items:
+ - description: phandle to BPMP controller node
+ - description: PCIe controller ID
+ maximum: 10
+
unevaluatedProperties: false
required:
@@ -226,3 +280,60 @@ examples:
"p2u-5", "p2u-6", "p2u-7";
};
};
+
+ - |
+ #include <dt-bindings/clock/tegra234-clock.h>
+ #include <dt-bindings/gpio/tegra234-gpio.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/power/tegra234-powergate.h>
+ #include <dt-bindings/reset/tegra234-reset.h>
+
+ bus@0 {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges = <0x0 0x0 0x0 0x8 0x0>;
+
+ pcie-ep@141a0000 {
+ compatible = "nvidia,tegra234-pcie-ep";
+ power-domains = <&bpmp TEGRA234_POWER_DOMAIN_PCIEX8A>;
+ reg = <0x00 0x141a0000 0x0 0x00020000>, /* appl registers (128K) */
+ <0x00 0x3a040000 0x0 0x00040000>, /* iATU_DMA reg space (256K) */
+ <0x00 0x3a080000 0x0 0x00040000>, /* DBI reg space (256K) */
+ <0x27 0x40000000 0x4 0x00000000>; /* Address Space (16G) */
+ reg-names = "appl", "atu_dma", "dbi", "addr_space";
+
+ interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
+ interrupt-names = "intr";
+
+ clocks = <&bpmp TEGRA234_CLK_PEX1_C5_CORE>;
+ clock-names = "core";
+
+ resets = <&bpmp TEGRA234_RESET_PEX1_CORE_5_APB>,
+ <&bpmp TEGRA234_RESET_PEX1_CORE_5>;
+ reset-names = "apb", "core";
+
+ nvidia,bpmp = <&bpmp 5>;
+
+ nvidia,enable-ext-refclk;
+ nvidia,aspm-cmrt-us = <60>;
+ nvidia,aspm-pwr-on-t-us = <20>;
+ nvidia,aspm-l0s-entrance-latency-us = <3>;
+
+ vddio-pex-ctl-supply = <&p3701_vdd_1v8_ls>;
+
+ reset-gpios = <&gpio TEGRA234_MAIN_GPIO(AF, 1) GPIO_ACTIVE_LOW>;
+
+ nvidia,refclk-select-gpios = <&gpio_aon
+ TEGRA234_AON_GPIO(AA, 4)
+ GPIO_ACTIVE_HIGH>;
+
+ num-lanes = <8>;
+
+ phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>,
+ <&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>,
+ <&p2u_nvhs_6>, <&p2u_nvhs_7>;
+
+ phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4",
+ "p2u-5", "p2u-6", "p2u-7";
+ };
+ };
--
2.17.1
On Thu, 07 Jul 2022 13:42:55 +0530, Vidya Sagar wrote:
> Add support for PCIe controllers that operate in the endpoint mode
> in tegra234 chipset.
>
> Signed-off-by: Vidya Sagar <[email protected]>
> ---
> V4:
> * Rebased on top of previous patch
>
> V3:
> * New patch in this series
>
> .../bindings/pci/nvidia,tegra194-pcie-ep.yaml | 123 +++++++++++++++++-
> 1 file changed, 117 insertions(+), 6 deletions(-)
>
My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):
yamllint warnings/errors:
dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.example.dtb: pcie-ep@141a0000: Unevaluated properties are not allowed ('nvidia,enable-ext-refclk' was unexpected)
From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml
doc reference errors (make refcheckdocs):
See https://patchwork.ozlabs.org/patch/
This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.
If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:
pip3 install dtschema --upgrade
Please check and re-submit.
On 7/7/2022 5:57 PM, Rob Herring wrote:
> External email: Use caution opening links or attachments
>
>
> On Thu, 07 Jul 2022 13:42:55 +0530, Vidya Sagar wrote:
>> Add support for PCIe controllers that operate in the endpoint mode
>> in tegra234 chipset.
>>
>> Signed-off-by: Vidya Sagar <[email protected]>
>> ---
>> V4:
>> * Rebased on top of previous patch
>>
>> V3:
>> * New patch in this series
>>
>> .../bindings/pci/nvidia,tegra194-pcie-ep.yaml | 123 +++++++++++++++++-
>> 1 file changed, 117 insertions(+), 6 deletions(-)
>>
>
> My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
> on your patch (DT_CHECKER_FLAGS is new in v5.13):
>
> yamllint warnings/errors:
>
> dtschema/dtc warnings/errors:
> /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.example.dtb: pcie-ep@141a0000: Unevaluated properties are not allowed ('nvidia,enable-ext-refclk' was unexpected)
> From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml
>
> doc reference errors (make refcheckdocs):
>
> See https://patchwork.ozlabs.org/patch/
>
> This check can fail if there are any dependencies. The base for a patch
> series is generally the most recent rc1.
>
> If you already ran 'make dt_binding_check' and didn't see the above
> error(s), then make sure 'yamllint' is installed and dt-schema is up to
> date:
>
> pip3 install dtschema --upgrade
>
> Please check and re-submit.
I did run 'make dt_binding_check' before sending the patches for review
and didn't observe any issue. Just to make sure that I observe the same
issue locally, I updated dtschema and gave DT_CHECKER_FLAGS=-m and yet
didn't observe the tool reporting any issue.
FWIW, I think I missed adding the documentation for
'nvidia,enable-ext-refclk' property. I'll add it and send again, but
before that, I would like to see if my change addresses the issue
correctly and also there are no other issues. Could you please help me
with why I'm not observing the issue locally?
FWIW, Here is the output I get with V4 patch.
vidya@vidya-virtual-machine:~/x/linux-next$ make DT_CHECKER_FLAGS=-m
dt_binding_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml
LINT Documentation/devicetree/bindings
CHKDT Documentation/devicetree/bindings/processed-schema.json
SCHEMA Documentation/devicetree/bindings/processed-schema.json
/home/vidya/x/linux-next/Documentation/devicetree/bindings/display/tegra/nvidia,tegra124-sor.yaml:
ignoring, error in schema: allOf: 1: if: not: properties
DTEX
Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.example.dts
DTC
Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.example.dtb
CHECK
Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.example.dtb
vidya@vidya-virtual-machine:~/x/linux-next$
Thanks,
Vidya Sagar
>
On Sat, Jul 09, 2022 at 08:03:45AM +0530, Vidya Sagar wrote:
>
>
> On 7/7/2022 5:57 PM, Rob Herring wrote:
> > External email: Use caution opening links or attachments
> >
> >
> > On Thu, 07 Jul 2022 13:42:55 +0530, Vidya Sagar wrote:
> > > Add support for PCIe controllers that operate in the endpoint mode
> > > in tegra234 chipset.
> > >
> > > Signed-off-by: Vidya Sagar <[email protected]>
> > > ---
> > > V4:
> > > * Rebased on top of previous patch
> > >
> > > V3:
> > > * New patch in this series
> > >
> > > .../bindings/pci/nvidia,tegra194-pcie-ep.yaml | 123 +++++++++++++++++-
> > > 1 file changed, 117 insertions(+), 6 deletions(-)
> > >
> >
> > My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
> > on your patch (DT_CHECKER_FLAGS is new in v5.13):
> >
> > yamllint warnings/errors:
> >
> > dtschema/dtc warnings/errors:
> > /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.example.dtb: pcie-ep@141a0000: Unevaluated properties are not allowed ('nvidia,enable-ext-refclk' was unexpected)
> > From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml
> >
> > doc reference errors (make refcheckdocs):
> >
> > See https://patchwork.ozlabs.org/patch/
> >
> > This check can fail if there are any dependencies. The base for a patch
> > series is generally the most recent rc1.
> >
> > If you already ran 'make dt_binding_check' and didn't see the above
> > error(s), then make sure 'yamllint' is installed and dt-schema is up to
> > date:
> >
> > pip3 install dtschema --upgrade
> >
> > Please check and re-submit.
>
> I did run 'make dt_binding_check' before sending the patches for review and
> didn't observe any issue. Just to make sure that I observe the same issue
> locally, I updated dtschema and gave DT_CHECKER_FLAGS=-m and yet didn't
> observe the tool reporting any issue.
> FWIW, I think I missed adding the documentation for
> 'nvidia,enable-ext-refclk' property. I'll add it and send again, but before
> that, I would like to see if my change addresses the issue correctly and
> also there are no other issues. Could you please help me with why I'm not
> observing the issue locally?
There's a fix for unevaluatedProperties that's only in the dtschema main
branch and not yet in a release.
Rob