netdev - [PATCH RFC net 1/2] nfc: nxp-nci: Fix i2c read on ThinkPad hardware

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Date: Wed,  7 Jun 2023 19:00:08 +0200
From: Marco Giorgi <giorgi.marco.96@...root.org>
To: netdev@...r.kernel.org
Cc: krzysztof.kozlowski@...aro.org,
	u.kleine-koenig@...gutronix.de,
	davem@...emloft.net,
	michael@...le.cc,
	kuba@...nel.org,
	linux-kernel@...r.kernel.org,
	Marco Giorgi <giorgi.marco.96@...root.org>
Subject: [PATCH RFC net 1/2] nfc: nxp-nci: Fix i2c read on ThinkPad hardware

Add the IRQ GPIO configuration.

Signed-off-by: Marco Giorgi <giorgi.marco.96@...root.org>
---
 drivers/nfc/nxp-nci/i2c.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c
index d4c299be7949..4ba26a958258 100644
--- a/drivers/nfc/nxp-nci/i2c.c
+++ b/drivers/nfc/nxp-nci/i2c.c
@@ -35,6 +35,7 @@ struct nxp_nci_i2c_phy {
 
 	struct gpio_desc *gpiod_en;
 	struct gpio_desc *gpiod_fw;
+	struct gpio_desc *gpiod_irq;
 
 	int hard_fault; /*
 			 * < 0 if hardware error occurred (e.g. i2c err)
@@ -254,10 +255,12 @@ static irqreturn_t nxp_nci_i2c_irq_thread_fn(int irq, void *phy_id)
 	return IRQ_NONE;
 }
 
+static const struct acpi_gpio_params irq_gpios = { 0, 0, false };
 static const struct acpi_gpio_params firmware_gpios = { 1, 0, false };
 static const struct acpi_gpio_params enable_gpios = { 2, 0, false };
 
 static const struct acpi_gpio_mapping acpi_nxp_nci_gpios[] = {
+	{ "irq-gpios", &irq_gpios, 1 },
 	{ "enable-gpios", &enable_gpios, 1 },
 	{ "firmware-gpios", &firmware_gpios, 1 },
 	{ }
@@ -286,6 +289,12 @@ static int nxp_nci_i2c_probe(struct i2c_client *client)
 	if (r)
 		dev_dbg(dev, "Unable to add GPIO mapping table\n");
 
+	phy->gpiod_irq = devm_gpiod_get(dev, "irq", GPIOD_IN);
+	if (IS_ERR(phy->gpiod_irq)) {
+		nfc_err(dev, "Failed to get IRQ gpio\n");
+		return PTR_ERR(phy->gpiod_irq);
+	}
+
 	phy->gpiod_en = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
 	if (IS_ERR(phy->gpiod_en)) {
 		nfc_err(dev, "Failed to get EN gpio\n");
-- 
2.41.0