linux-kernel - [PATCH V3 2/6] dt-bindings: PCI: tegra: Add PCIe slot supplies regulator entries

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Date:   Wed, 28 Aug 2019 22:58:46 +0530
From:   Vidya Sagar <vidyas@...dia.com>
To:     <lorenzo.pieralisi@....com>, <bhelgaas@...gle.com>,
        <robh+dt@...nel.org>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <andrew.murray@....com>
CC:     <kishon@...com>, <gustavo.pimentel@...opsys.com>,
        <digetx@...il.com>, <mperttunen@...dia.com>,
        <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <kthota@...dia.com>,
        <mmaddireddy@...dia.com>, <vidyas@...dia.com>, <sagar.tv@...il.com>
Subject: [PATCH V3 2/6] dt-bindings: PCI: tegra: Add PCIe slot supplies regulator entries

Add optional bindings "vpcie3v3-supply" and "vpcie12v-supply" to describe
regulators of a PCIe slot's supplies 3.3V and 12V provided the platform
is designed to have regulator controlled slot supplies.

Signed-off-by: Vidya Sagar <vidyas@...dia.com>
---
V3:
* None

V2:
* None

 .../devicetree/bindings/pci/nvidia,tegra194-pcie.txt      | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt
index 0ac1b867ac24..b739f92da58e 100644
--- a/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt
@@ -104,6 +104,12 @@ Optional properties:
    specified in microseconds
 - nvidia,aspm-l0s-entrance-latency-us: ASPM L0s entrance latency to be
    specified in microseconds
+- vpcie3v3-supply: A phandle to the regulator node that supplies 3.3V to the slot
+  if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
+  in p2972-0000 platform).
+- vpcie12v-supply: A phandle to the regulator node that supplies 12V to the slot
+  if the platform has one such slot. (Ex:- x16 slot owned by C5 controller
+  in p2972-0000 platform).
 
 Examples:
 =========
@@ -156,6 +162,8 @@ Tegra194:
 			  0xc2000000 0x18 0x00000000 0x18 0x00000000 0x4 0x00000000>;  /* prefetchable memory (16GB) */
 
 		vddio-pex-ctl-supply = <&vdd_1v8ao>;
+		vpcie3v3-supply = <&vdd_3v3_pcie>;
+		vpcie12v-supply = <&vdd_12v_pcie>;
 
 		phys = <&p2u_hsio_2>, <&p2u_hsio_3>, <&p2u_hsio_4>,
 		       <&p2u_hsio_5>;
-- 
2.17.1