linux-kernel - [PATCH] PCI: j721e: Add PCIe support for J722S SoC

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Date: Fri, 24 May 2024 14:53:49 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: <bhelgaas@...gle.com>, <lpieralisi@...nel.org>, <kw@...ux.com>,
        <robh@...nel.org>, <vigneshr@...com>
CC: <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <u-kumar1@...com>,
        <danishanwar@...com>, <srk@...com>, <s-vadapalli@...com>
Subject: [PATCH] PCI: j721e: Add PCIe support for J722S SoC

TI's J722S SoC has one instance of PCIe namely PCIe0 which is a Gen3
single lane PCIe controller. Add support for the "ti,j722s-pcie-host"
compatible specific to J722S SoC.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---

Hello,

This patch is based on linux-next tagged next-20240523.
The dt-bindings patch for the compatible at:
https://lore.kernel.org/r/20240124122936.816142-1-s-vadapalli@ti.com/
has been accepted and merged:
https://git.kernel.org/pci/pci/c/01fec70206d4

Regards,
Siddharth.

 drivers/pci/controller/cadence/pci-j721e.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
index 85718246016b..cde6cd77e406 100644
--- a/drivers/pci/controller/cadence/pci-j721e.c
+++ b/drivers/pci/controller/cadence/pci-j721e.c
@@ -344,6 +344,13 @@ static const struct j721e_pcie_data j784s4_pcie_ep_data = {
 	.max_lanes = 4,
 };
 
+static const struct j721e_pcie_data j722s_pcie_rc_data = {
+	.mode = PCI_MODE_RC,
+	.linkdown_irq_regfield = J7200_LINK_DOWN,
+	.byte_access_allowed = true,
+	.max_lanes = 1,
+};
+
 static const struct of_device_id of_j721e_pcie_match[] = {
 	{
 		.compatible = "ti,j721e-pcie-host",
@@ -377,6 +384,10 @@ static const struct of_device_id of_j721e_pcie_match[] = {
 		.compatible = "ti,j784s4-pcie-ep",
 		.data = &j784s4_pcie_ep_data,
 	},
+	{
+		.compatible = "ti,j722s-pcie-host",
+		.data = &j722s_pcie_rc_data,
+	},
 	{},
 };
 
-- 
2.40.1