linux-kernel - [PATCH v1 1/6] mfd: kempld: Replace ACPI code with agnostic one

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Date: Fri, 23 Feb 2024 21:49:50 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Cc: Lee Jones <lee@...nel.org>
Subject: [PATCH v1 1/6] mfd: kempld: Replace ACPI code with agnostic one

There is no need to include and use entire ACPI stack in the driver.
Replace respective pieces by agnostic code. No functional change
indented.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/mfd/kempld-core.c | 38 +++++++++++---------------------------
 1 file changed, 11 insertions(+), 27 deletions(-)

diff --git a/drivers/mfd/kempld-core.c b/drivers/mfd/kempld-core.c
index 5557f023a173..99c8656e723c 100644
--- a/drivers/mfd/kempld-core.c
+++ b/drivers/mfd/kempld-core.c
@@ -9,11 +9,12 @@
 #include <linux/platform_device.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/kempld.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
+#include <linux/property.h>
 #include <linux/dmi.h>
 #include <linux/io.h>
 #include <linux/delay.h>
-#include <linux/acpi.h>
 
 #define MAX_ID_LEN 4
 static char force_device_id[MAX_ID_LEN + 1] = "";
@@ -425,26 +426,6 @@ static int kempld_detect_device(struct kempld_device_data *pld)
 	return ret;
 }
 
-#ifdef CONFIG_ACPI
-static int kempld_get_acpi_data(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	const struct kempld_platform_data *pdata;
-	int ret;
-
-	pdata = acpi_device_get_match_data(dev);
-	ret = platform_device_add_data(pdev, pdata,
-				       sizeof(struct kempld_platform_data));
-
-	return ret;
-}
-#else
-static int kempld_get_acpi_data(struct platform_device *pdev)
-{
-	return -ENODEV;
-}
-#endif /* CONFIG_ACPI */
-
 static int kempld_probe(struct platform_device *pdev)
 {
 	const struct kempld_platform_data *pdata;
@@ -458,10 +439,16 @@ static int kempld_probe(struct platform_device *pdev)
 		 * No kempld_pdev device has been registered in kempld_init,
 		 * so we seem to be probing an ACPI platform device.
 		 */
-		ret = kempld_get_acpi_data(pdev);
+		pdata = device_get_match_data(dev);
+		if (!pdata)
+			return -ENODEV;
+
+		ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
 		if (ret)
 			return ret;
-	} else if (kempld_pdev != pdev) {
+	} else if (kempld_pdev == pdev) {
+		pdata = dev_get_platdata(dev);
+	} else {
 		/*
 		 * The platform device we are probing is not the one we
 		 * registered in kempld_init using the DMI table, so this one
@@ -472,7 +459,6 @@ static int kempld_probe(struct platform_device *pdev)
 		dev_notice(dev, "platform device exists - not using ACPI\n");
 		return -ENODEV;
 	}
-	pdata = dev_get_platdata(dev);
 
 	pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL);
 	if (!pld)
@@ -509,19 +495,17 @@ static void kempld_remove(struct platform_device *pdev)
 	pdata->release_hardware_mutex(pld);
 }
 
-#ifdef CONFIG_ACPI
 static const struct acpi_device_id kempld_acpi_table[] = {
 	{ "KEM0000", (kernel_ulong_t)&kempld_platform_data_generic },
 	{ "KEM0001", (kernel_ulong_t)&kempld_platform_data_generic },
 	{}
 };
 MODULE_DEVICE_TABLE(acpi, kempld_acpi_table);
-#endif
 
 static struct platform_driver kempld_driver = {
 	.driver		= {
 		.name	= "kempld",
-		.acpi_match_table = ACPI_PTR(kempld_acpi_table),
+		.acpi_match_table = kempld_acpi_table,
 	},
 	.probe		= kempld_probe,
 	.remove_new	= kempld_remove,
-- 
2.43.0.rc1.1.gbec44491f096