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Date: Tue, 3 Aug 2021 22:40:39 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Hans de Goede <hdegoede@...hat.com>,
Mario Limonciello <mario.limonciello@...l.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Mark Gross <mgross@...ux.intel.com>,
Pali Rohár <pali@...nel.org>
Subject: [RFT, PATCH v1 1/1] platform/x86: dell-smo8800: Convert to be a platform driver
ACPI core in conjunction with platform driver core provides
an infrastructure to enumerate ACPI devices. Use it in order
to remove a lot of boilerplate code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/platform/x86/dell/Kconfig | 2 +-
drivers/platform/x86/dell/dell-smo8800.c | 74 ++++++------------------
2 files changed, 20 insertions(+), 56 deletions(-)
diff --git a/drivers/platform/x86/dell/Kconfig b/drivers/platform/x86/dell/Kconfig
index 9e7314d90bea..821aba31821c 100644
--- a/drivers/platform/x86/dell/Kconfig
+++ b/drivers/platform/x86/dell/Kconfig
@@ -140,7 +140,7 @@ config DELL_SMBIOS_SMM
config DELL_SMO8800
tristate "Dell Latitude freefall driver (ACPI SMO88XX)"
default m
- depends on ACPI
+ depends on ACPI || COMPILE_TEST
help
Say Y here if you want to support SMO88XX freefall devices
on Dell Latitude laptops.
diff --git a/drivers/platform/x86/dell/dell-smo8800.c b/drivers/platform/x86/dell/dell-smo8800.c
index 5d9304a7de1b..3385e852104c 100644
--- a/drivers/platform/x86/dell/dell-smo8800.c
+++ b/drivers/platform/x86/dell/dell-smo8800.c
@@ -10,13 +10,14 @@
#define DRIVER_NAME "smo8800"
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/acpi.h>
+#include <linux/fs.h>
#include <linux/interrupt.h>
+#include <linux/kernel.h>
#include <linux/miscdevice.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
#include <linux/uaccess.h>
-#include <linux/fs.h>
struct smo8800_device {
u32 irq; /* acpi device irq */
@@ -44,37 +45,6 @@ static irqreturn_t smo8800_interrupt_thread(int irq, void *data)
return IRQ_HANDLED;
}
-static acpi_status smo8800_get_resource(struct acpi_resource *resource,
- void *context)
-{
- struct acpi_resource_extended_irq *irq;
-
- if (resource->type != ACPI_RESOURCE_TYPE_EXTENDED_IRQ)
- return AE_OK;
-
- irq = &resource->data.extended_irq;
- if (!irq || !irq->interrupt_count)
- return AE_OK;
-
- *((u32 *)context) = irq->interrupts[0];
- return AE_CTRL_TERMINATE;
-}
-
-static u32 smo8800_get_irq(struct acpi_device *device)
-{
- u32 irq = 0;
- acpi_status status;
-
- status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
- smo8800_get_resource, &irq);
- if (ACPI_FAILURE(status)) {
- dev_err(&device->dev, "acpi_walk_resources failed\n");
- return 0;
- }
-
- return irq;
-}
-
static ssize_t smo8800_misc_read(struct file *file, char __user *buf,
size_t count, loff_t *pos)
{
@@ -136,7 +106,7 @@ static const struct file_operations smo8800_misc_fops = {
.release = smo8800_misc_release,
};
-static int smo8800_add(struct acpi_device *device)
+static int smo8800_probe(struct platform_device *device)
{
int err;
struct smo8800_device *smo8800;
@@ -160,14 +130,12 @@ static int smo8800_add(struct acpi_device *device)
return err;
}
- device->driver_data = smo8800;
+ platform_set_drvdata(device, smo8800);
- smo8800->irq = smo8800_get_irq(device);
- if (!smo8800->irq) {
- dev_err(&device->dev, "failed to obtain IRQ\n");
- err = -EINVAL;
+ err = platform_get_irq(device, 0);
+ if (err < 0)
goto error;
- }
+ smo8800->irq = err;
err = request_threaded_irq(smo8800->irq, smo8800_interrupt_quick,
smo8800_interrupt_thread,
@@ -189,9 +157,9 @@ static int smo8800_add(struct acpi_device *device)
return err;
}
-static int smo8800_remove(struct acpi_device *device)
+static int smo8800_remove(struct platform_device *device)
{
- struct smo8800_device *smo8800 = device->driver_data;
+ struct smo8800_device *smo8800 = platform_get_drvdata(device);
free_irq(smo8800->irq, smo8800);
misc_deregister(&smo8800->miscdev);
@@ -211,21 +179,17 @@ static const struct acpi_device_id smo8800_ids[] = {
{ "SMO8831", 0 },
{ "", 0 },
};
-
MODULE_DEVICE_TABLE(acpi, smo8800_ids);
-static struct acpi_driver smo8800_driver = {
- .name = DRIVER_NAME,
- .class = "Latitude",
- .ids = smo8800_ids,
- .ops = {
- .add = smo8800_add,
- .remove = smo8800_remove,
+static struct platform_driver smo8800_driver = {
+ .probe = smo8800_probe,
+ .remove = smo8800_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .acpi_match_table = smo8800_ids,
},
- .owner = THIS_MODULE,
};
-
-module_acpi_driver(smo8800_driver);
+module_platform_driver(smo8800_driver);
MODULE_DESCRIPTION("Dell Latitude freefall driver (ACPI SMO88XX)");
MODULE_LICENSE("GPL");
--
2.30.2
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