linux-kernel - [PATCH 2/6] PCI/pwrctrl: Move pci_pwrctrl_init() before turning ON the supplies

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Message-Id: <20250819-pci-pwrctrl-perst-v1-2-4b74978d2007@oss.qualcomm.com>
Date: Tue, 19 Aug 2025 12:44:51 +0530
From: Manivannan Sadhasivam via B4 Relay <devnull+manivannan.sadhasivam.oss.qualcomm.com@...nel.org>
To: Manivannan Sadhasivam <mani@...nel.org>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Saravana Kannan <saravanak@...gle.com>
Cc: linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>, 
 Brian Norris <briannorris@...omium.org>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 2/6] PCI/pwrctrl: Move pci_pwrctrl_init() before turning ON
 the supplies

From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>

To allow pwrctrl core to parse the generic resources such as PERST# GPIO
before turning on the supplies.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
---
 drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c | 4 ++--
 drivers/pci/pwrctrl/slot.c               | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c b/drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c
index 4e664e7b8dd23f592c0392efbf6728fc5bf9093f..b65955adc7bd44030593e8c49d60db0f39b03d03 100644
--- a/drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c
+++ b/drivers/pci/pwrctrl/pci-pwrctrl-pwrseq.c
@@ -80,6 +80,8 @@ static int pci_pwrctrl_pwrseq_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
+	pci_pwrctrl_init(&data->ctx, dev);
+
 	data->pwrseq = devm_pwrseq_get(dev, pdata->target);
 	if (IS_ERR(data->pwrseq))
 		return dev_err_probe(dev, PTR_ERR(data->pwrseq),
@@ -95,8 +97,6 @@ static int pci_pwrctrl_pwrseq_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	pci_pwrctrl_init(&data->ctx, dev);
-
 	ret = devm_pci_pwrctrl_device_set_ready(dev, &data->ctx);
 	if (ret)
 		return dev_err_probe(dev, ret,
diff --git a/drivers/pci/pwrctrl/slot.c b/drivers/pci/pwrctrl/slot.c
index 6e138310b45b9f7e930b6814e0a24f7111d25fee..b68406a6b027e4d9f853e86d4340e0ab267b6126 100644
--- a/drivers/pci/pwrctrl/slot.c
+++ b/drivers/pci/pwrctrl/slot.c
@@ -38,6 +38,8 @@ static int pci_pwrctrl_slot_probe(struct platform_device *pdev)
 	if (!slot)
 		return -ENOMEM;
 
+	pci_pwrctrl_init(&slot->ctx, dev);
+
 	ret = of_regulator_bulk_get_all(dev, dev_of_node(dev),
 					&slot->supplies);
 	if (ret < 0) {
@@ -63,8 +65,6 @@ static int pci_pwrctrl_slot_probe(struct platform_device *pdev)
 				     "Failed to enable slot clock\n");
 	}
 
-	pci_pwrctrl_init(&slot->ctx, dev);
-
 	ret = devm_pci_pwrctrl_device_set_ready(dev, &slot->ctx);
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to register pwrctrl driver\n");

-- 
2.45.2