linux-kernel - [PATCH 07/11] PCI: keystone: Add ks_pcie_host

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Message-ID: <20250903124505.365913-8-s-vadapalli@ti.com>
Date: Wed, 3 Sep 2025 18:14:48 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: <lpieralisi@...nel.org>, <kwilczynski@...nel.org>, <mani@...nel.org>,
        <robh@...nel.org>, <bhelgaas@...gle.com>, <jingoohan1@...il.com>,
        <fan.ni@...sung.com>, <quic_wenbyao@...cinc.com>,
        <namcao@...utronix.de>, <mayank.rana@....qualcomm.com>,
        <thippeswamy.havalige@....com>, <quic_schintav@...cinc.com>,
        <shradha.t@...sung.com>, <inochiama@...il.com>, <cassel@...nel.org>,
        <kishon@...nel.org>, <18255117159@....com>, <rongqianfeng@...o.com>,
        <jirislaby@...nel.org>
CC: <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>,
        <s-vadapalli@...com>
Subject: [PATCH 07/11] PCI: keystone: Add ks_pcie_host_deinit() helper for cleanup

Introduce the helper function ks_pcie_host_deinit() to undo the
configuration performed by the ks_pcie_host_init() function and also to
free the MSI Domains if the '.msi_init' callback was implemented which
would have made a call to dw_pcie_allocate_domains().

Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
 drivers/pci/controller/dwc/pci-keystone.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 3afa298e89d1..f432818f6802 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -885,6 +885,18 @@ static int __init ks_pcie_init_id(struct keystone_pcie *ks_pcie)
 	return 0;
 }
 
+static void ks_pcie_host_deinit(struct dw_pcie_rp *pp)
+{
+	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+	struct keystone_pcie *ks_pcie = to_keystone_pcie(pci);
+
+	ks_pcie_stop_link(pci);
+	ks_pcie_free_msi_irq(ks_pcie);
+	ks_pcie_free_intx_irq(ks_pcie);
+	if (pci->pp.ops->msi_init)
+		dw_pcie_free_domains(pp);
+}
+
 static int __init ks_pcie_host_init(struct dw_pcie_rp *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
@@ -929,11 +941,13 @@ static int __init ks_pcie_host_init(struct dw_pcie_rp *pp)
 
 static const struct dw_pcie_host_ops ks_pcie_host_ops = {
 	.init = ks_pcie_host_init,
+	.deinit = ks_pcie_host_deinit,
 	.msi_init = ks_pcie_msi_host_init,
 };
 
 static const struct dw_pcie_host_ops ks_pcie_am654_host_ops = {
 	.init = ks_pcie_host_init,
+	.deinit = ks_pcie_host_deinit,
 };
 
 static irqreturn_t ks_pcie_err_irq_handler(int irq, void *priv)
-- 
2.43.0