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Message-Id: <20260127-topic-sm8650-ayaneo-pocket-s2-base-v2-2-c55ec1b5d8bf@linaro.org>
Date: Tue, 27 Jan 2026 10:57:29 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konradybcio@...nel.org>,
Rob Clark <robin.clark@....qualcomm.com>,
Dmitry Baryshkov <lumag@...nel.org>,
Abhinav Kumar <abhinav.kumar@...ux.dev>,
Jessica Zhang <jesszhan0024@...il.com>, Sean Paul <sean@...rly.run>,
Marijn Suijten <marijn.suijten@...ainline.org>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Magnus Damm <magnus.damm@...il.com>, Bartosz Golaszewski <brgl@...nel.org>,
Manivannan Sadhasivam <mani@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
freedreno@...ts.freedesktop.org, linux-usb@...r.kernel.org,
linux-renesas-soc@...r.kernel.org, linux-pci@...r.kernel.org,
Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH v2 2/7] pci: pwrctrl: add PCI pwrctrl driver for the
UPD720201/UPD720202 USB 3.0 xHCI Host Controller
Add support fo the Renesas UPD720201/UPD720202 USB 3.0 xHCI Host Controller
power control which connects over PCIe and requires specific power supplies
to start up.
Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
drivers/pci/pwrctrl/Kconfig | 10 ++++
drivers/pci/pwrctrl/Makefile | 2 +
drivers/pci/pwrctrl/pci-pwrctrl-upd720201.c | 88 +++++++++++++++++++++++++++++
3 files changed, 100 insertions(+)
diff --git a/drivers/pci/pwrctrl/Kconfig b/drivers/pci/pwrctrl/Kconfig
index e0f999f299bb..5a94e60d0d3e 100644
--- a/drivers/pci/pwrctrl/Kconfig
+++ b/drivers/pci/pwrctrl/Kconfig
@@ -11,6 +11,16 @@ config PCI_PWRCTRL_PWRSEQ
select POWER_SEQUENCING
select PCI_PWRCTRL
+config PCI_PWRCTRL_UPD720201
+ tristate "PCI Power Control driver for the UPD720201 USB3 Host Controller"
+ select PCI_PWRCTRL
+ help
+ Say Y here to enable the PCI Power Control driver of the UPD720201
+ USB3 Host Controller.
+
+ The voltage regulators powering the rails of the PCI slots
+ are expected to be defined in the devicetree node of the PCI device.
+
config PCI_PWRCTRL_SLOT
tristate "PCI Power Control driver for PCI slots"
select PCI_PWRCTRL
diff --git a/drivers/pci/pwrctrl/Makefile b/drivers/pci/pwrctrl/Makefile
index 13b02282106c..a99f85de8a3d 100644
--- a/drivers/pci/pwrctrl/Makefile
+++ b/drivers/pci/pwrctrl/Makefile
@@ -5,6 +5,8 @@ pci-pwrctrl-core-y := core.o
obj-$(CONFIG_PCI_PWRCTRL_PWRSEQ) += pci-pwrctrl-pwrseq.o
+obj-$(CONFIG_PCI_PWRCTRL_UPD720201) += pci-pwrctrl-upd720201.o
+
obj-$(CONFIG_PCI_PWRCTRL_SLOT) += pci-pwrctrl-slot.o
pci-pwrctrl-slot-y := slot.o
diff --git a/drivers/pci/pwrctrl/pci-pwrctrl-upd720201.c b/drivers/pci/pwrctrl/pci-pwrctrl-upd720201.c
new file mode 100644
index 000000000000..db96bbb69c21
--- /dev/null
+++ b/drivers/pci/pwrctrl/pci-pwrctrl-upd720201.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Based on upd720201.c:
+ * Copyright (C) 2024 Linaro Ltd.
+ * Author: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
+ */
+
+#include <linux/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/pci-pwrctrl.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+struct pci_pwrctrl_upd720201_data {
+ struct pci_pwrctrl ctx;
+ struct regulator_bulk_data *supplies;
+ int num_supplies;
+};
+
+static void devm_pci_pwrctrl_upd720201_power_off(void *data)
+{
+ struct pci_pwrctrl_upd720201_data *upd720201 = data;
+
+ regulator_bulk_disable(upd720201->num_supplies, upd720201->supplies);
+ regulator_bulk_free(upd720201->num_supplies, upd720201->supplies);
+}
+
+static int pci_pwrctrl_upd720201_probe(struct platform_device *pdev)
+{
+ struct pci_pwrctrl_upd720201_data *upd720201;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ upd720201 = devm_kzalloc(dev, sizeof(*upd720201), GFP_KERNEL);
+ if (!upd720201)
+ return -ENOMEM;
+
+ ret = of_regulator_bulk_get_all(dev, dev_of_node(dev),
+ &upd720201->supplies);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "Failed to get upd720201 regulators\n");
+ return ret;
+ }
+
+ upd720201->num_supplies = ret;
+ ret = regulator_bulk_enable(upd720201->num_supplies, upd720201->supplies);
+ if (ret < 0) {
+ dev_err_probe(dev, ret, "Failed to enable upd720201 regulators\n");
+ regulator_bulk_free(upd720201->num_supplies, upd720201->supplies);
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(dev, devm_pci_pwrctrl_upd720201_power_off,
+ upd720201);
+ if (ret)
+ return ret;
+
+ pci_pwrctrl_init(&upd720201->ctx, dev);
+
+ ret = devm_pci_pwrctrl_device_set_ready(dev, &upd720201->ctx);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to register pwrctrl driver\n");
+
+ return 0;
+}
+
+static const struct of_device_id pci_pwrctrl_upd720201_of_match[] = {
+ {
+ .compatible = "pci1912,0014",
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, pci_pwrctrl_upd720201_of_match);
+
+static struct platform_driver pci_pwrctrl_upd720201_driver = {
+ .driver = {
+ .name = "pci-pwrctrl-upd720201",
+ .of_match_table = pci_pwrctrl_upd720201_of_match,
+ },
+ .probe = pci_pwrctrl_upd720201_probe,
+};
+module_platform_driver(pci_pwrctrl_upd720201_driver);
+
+MODULE_AUTHOR("Neil Armstrong <neil.armstrong@...aro.org>");
+MODULE_DESCRIPTION("PCI Power Control driver for UPD720201 USB3 Host Controller");
+MODULE_LICENSE("GPL");
--
2.34.1
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