linux-kernel - [PATCH v3 4/5] PCI: imx6: Convert to agnostic GPIO API

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Date: Mon, 29 Apr 2024 13:23:21 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Frank Li <Frank.Li@....com>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	linux-omap@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-amlogic@...ts.infradead.org,
	linux-arm-msm@...r.kernel.org,
	linux-tegra@...r.kernel.org
Cc: Vignesh Raghavendra <vigneshr@...com>,
	Siddharth Vadapalli <s-vadapalli@...com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Richard Zhu <hongxing.zhu@....com>,
	Lucas Stach <l.stach@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Yue Wang <yue.wang@...ogic.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Kevin Hilman <khilman@...libre.com>,
	Jerome Brunet <jbrunet@...libre.com>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	Xiaowei Song <songxiaowei@...ilicon.com>,
	Binghui Wang <wangbinghui@...ilicon.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	Pali Rohár <pali@...nel.org>
Subject: [PATCH v3 4/5] PCI: imx6: Convert to agnostic GPIO API

The of_gpio.h is going to be removed. In preparation of that convert
the driver to the agnostic API.

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Reviewed-by: Frank Li <Frank.Li@....com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 37 ++++++++++-----------------
 1 file changed, 14 insertions(+), 23 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 917c69edee1d..d620f1e1a43c 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -11,14 +11,13 @@
 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/kernel.h>
 #include <linux/mfd/syscon.h>
 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <linux/mfd/syscon/imx7-iomuxc-gpr.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/of_address.h>
 #include <linux/pci.h>
 #include <linux/platform_device.h>
@@ -107,7 +106,7 @@ struct imx6_pcie_drvdata {
 
 struct imx6_pcie {
 	struct dw_pcie		*pci;
-	int			reset_gpio;
+	struct gpio_desc	*reset_gpiod;
 	bool			gpio_active_high;
 	bool			link_is_up;
 	struct clk_bulk_data	clks[IMX6_PCIE_MAX_CLKS];
@@ -721,9 +720,8 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)
 	}
 
 	/* Some boards don't have PCIe reset GPIO. */
-	if (gpio_is_valid(imx6_pcie->reset_gpio))
-		gpio_set_value_cansleep(imx6_pcie->reset_gpio,
-					imx6_pcie->gpio_active_high);
+	gpiod_set_raw_value_cansleep(imx6_pcie->reset_gpiod,
+				     imx6_pcie->gpio_active_high);
 }
 
 static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
@@ -771,10 +769,10 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
 	}
 
 	/* Some boards don't have PCIe reset GPIO. */
-	if (gpio_is_valid(imx6_pcie->reset_gpio)) {
+	if (imx6_pcie->reset_gpiod) {
 		msleep(100);
-		gpio_set_value_cansleep(imx6_pcie->reset_gpio,
-					!imx6_pcie->gpio_active_high);
+		gpiod_set_raw_value_cansleep(imx6_pcie->reset_gpiod,
+					     !imx6_pcie->gpio_active_high);
 		/* Wait for 100ms after PERST# deassertion (PCIe r5.0, 6.6.1) */
 		msleep(100);
 	}
@@ -1285,22 +1283,15 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 		return PTR_ERR(pci->dbi_base);
 
 	/* Fetch GPIOs */
-	imx6_pcie->reset_gpio = of_get_named_gpio(node, "reset-gpio", 0);
 	imx6_pcie->gpio_active_high = of_property_read_bool(node,
 						"reset-gpio-active-high");
-	if (gpio_is_valid(imx6_pcie->reset_gpio)) {
-		ret = devm_gpio_request_one(dev, imx6_pcie->reset_gpio,
-				imx6_pcie->gpio_active_high ?
-					GPIOF_OUT_INIT_HIGH :
-					GPIOF_OUT_INIT_LOW,
-				"PCIe reset");
-		if (ret) {
-			dev_err(dev, "unable to get reset gpio\n");
-			return ret;
-		}
-	} else if (imx6_pcie->reset_gpio == -EPROBE_DEFER) {
-		return imx6_pcie->reset_gpio;
-	}
+	imx6_pcie->reset_gpiod =
+		devm_gpiod_get_optional(dev, "reset",
+			imx6_pcie->gpio_active_high ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW);
+	if (IS_ERR(imx6_pcie->reset_gpiod))
+		return dev_err_probe(dev, PTR_ERR(imx6_pcie->reset_gpiod),
+				     "unable to get reset gpio\n");
+	gpiod_set_consumer_name(imx6_pcie->reset_gpiod, "PCIe reset");
 
 	if (imx6_pcie->drvdata->clks_cnt >= IMX6_PCIE_MAX_CLKS)
 		return dev_err_probe(dev, -ENOMEM, "clks_cnt is too big\n");
-- 
2.43.0.rc1.1336.g36b5255a03ac