From: Raag Jadav <raag.jadav@intel.com>
Date: Wed, 12 Nov 2025 03:40:11 +0000 (+0530)
Subject: gpio: elkhartlake: Convert to auxiliary driver
X-Git-Tag: v6.19-rc1~146^2~28
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=10c15296906952016a84e1e45d8dc361f35afbd8;p=thirdparty%2Flinux.git

gpio: elkhartlake: Convert to auxiliary driver

Since PCI device should not be abusing platform device, MFD parent to
platform child path is no longer being pursued for this driver. Convert
it to auxiliary driver, which will be used by EHL PSE auxiliary device.

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20251112034040.457801-3-raag.jadav@intel.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index f910c20f0d5d7..c74da29253e81 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1412,7 +1412,7 @@ config HTC_EGPIO
 
 config GPIO_ELKHARTLAKE
 	tristate "Intel Elkhart Lake PSE GPIO support"
-	depends on X86 || COMPILE_TEST
+	depends on INTEL_EHL_PSE_IO
 	select GPIO_TANGIER
 	help
 	  Select this option to enable GPIO support for Intel Elkhart Lake
diff --git a/drivers/gpio/gpio-elkhartlake.c b/drivers/gpio/gpio-elkhartlake.c
index 95de52d2cc634..b96e7928b6e59 100644
--- a/drivers/gpio/gpio-elkhartlake.c
+++ b/drivers/gpio/gpio-elkhartlake.c
@@ -2,43 +2,46 @@
 /*
  * Intel Elkhart Lake PSE GPIO driver
  *
- * Copyright (c) 2023 Intel Corporation.
+ * Copyright (c) 2023, 2025 Intel Corporation.
  *
  * Authors: Pandith N <pandith.n@intel.com>
  *          Raag Jadav <raag.jadav@intel.com>
  */
 
+#include <linux/auxiliary_bus.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/module.h>
-#include <linux/platform_device.h>
 #include <linux/pm.h>
 
+#include <linux/ehl_pse_io_aux.h>
+
 #include "gpio-tangier.h"
 
 /* Each Intel EHL PSE GPIO Controller has 30 GPIO pins */
 #define EHL_PSE_NGPIO		30
 
-static int ehl_gpio_probe(struct platform_device *pdev)
+static int ehl_gpio_probe(struct auxiliary_device *adev, const struct auxiliary_device_id *id)
 {
-	struct device *dev = &pdev->dev;
+	struct device *dev = &adev->dev;
+	struct ehl_pse_io_data *data;
 	struct tng_gpio *priv;
-	int irq, ret;
+	int ret;
 
-	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return irq;
+	data = dev_get_platdata(dev);
+	if (!data)
+		return -ENODATA;
 
 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
-	priv->reg_base = devm_platform_ioremap_resource(pdev, 0);
+	priv->reg_base = devm_ioremap_resource(dev, &data->mem);
 	if (IS_ERR(priv->reg_base))
 		return PTR_ERR(priv->reg_base);
 
 	priv->dev = dev;
-	priv->irq = irq;
+	priv->irq = data->irq;
 
 	priv->info.base = -1;
 	priv->info.ngpio = EHL_PSE_NGPIO;
@@ -51,25 +54,24 @@ static int ehl_gpio_probe(struct platform_device *pdev)
 	if (ret)
 		return dev_err_probe(dev, ret, "tng_gpio_probe error\n");
 
-	platform_set_drvdata(pdev, priv);
+	auxiliary_set_drvdata(adev, priv);
 	return 0;
 }
 
-static const struct platform_device_id ehl_gpio_ids[] = {
-	{ "gpio-elkhartlake" },
+static const struct auxiliary_device_id ehl_gpio_ids[] = {
+	{ EHL_PSE_IO_NAME "." EHL_PSE_GPIO_NAME },
 	{ }
 };
-MODULE_DEVICE_TABLE(platform, ehl_gpio_ids);
+MODULE_DEVICE_TABLE(auxiliary, ehl_gpio_ids);
 
-static struct platform_driver ehl_gpio_driver = {
+static struct auxiliary_driver ehl_gpio_driver = {
 	.driver	= {
-		.name	= "gpio-elkhartlake",
 		.pm	= pm_sleep_ptr(&tng_gpio_pm_ops),
 	},
 	.probe		= ehl_gpio_probe,
 	.id_table	= ehl_gpio_ids,
 };
-module_platform_driver(ehl_gpio_driver);
+module_auxiliary_driver(ehl_gpio_driver);
 
 MODULE_AUTHOR("Pandith N <pandith.n@intel.com>");
 MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>");