linux-kernel - [RFC PATCH 2/3] PCI: rcar-host: add support for optional regulators

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Message-Id: <20230508104557.47889-3-wsa+renesas@sang-engineering.com>
Date:   Mon,  8 May 2023 12:45:56 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-renesas-soc@...r.kernel.org
Cc:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Marek Vasut <marek.vasut+renesas@...il.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 2/3] PCI: rcar-host: add support for optional regulators

The KingFisher board has regulators. They just need to be en-/disabled,
so we can leave the handling to devm.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
 drivers/pci/controller/pcie-rcar-host.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controller/pcie-rcar-host.c
index e80e56b2a842..b0e4834176d2 100644
--- a/drivers/pci/controller/pcie-rcar-host.c
+++ b/drivers/pci/controller/pcie-rcar-host.c
@@ -29,6 +29,7 @@
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
 
 #include "pcie-rcar.h"
 
@@ -992,6 +993,14 @@ static int rcar_pcie_probe(struct platform_device *pdev)
 	pcie->dev = dev;
 	platform_set_drvdata(pdev, host);
 
+	err = devm_regulator_get_enable_optional(dev, "vpcie3v3");
+	if (err < 0 && err != -ENODEV)
+		dev_err_probe(dev, err, "error enabling 3.3V regulator");
+
+	err = devm_regulator_get_enable_optional(dev, "vpcie1v5");
+	if (err < 0 && err != -ENODEV)
+		dev_err_probe(dev, err, "error enabling 1.5V regulator");
+
 	pm_runtime_enable(pcie->dev);
 	err = pm_runtime_get_sync(pcie->dev);
 	if (err < 0) {
-- 
2.30.2