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Date: Tue, 27 Oct 2020 19:58:05 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Peng Hao <peng.hao2@....com.cn>, Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v1 4/5] misc: pvpanic: Combine ACPI and platform drivers
There is nothing special in the driver that requires
to have special ACPI driver for it. Combine both
into simple platform driver.
Cc: Peng Hao <peng.hao2@....com.cn>
Cc: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/misc/pvpanic.c | 130 ++++++-----------------------------------
1 file changed, 17 insertions(+), 113 deletions(-)
diff --git a/drivers/misc/pvpanic.c b/drivers/misc/pvpanic.c
index e16a5e51006e..103a09ed651d 100644
--- a/drivers/misc/pvpanic.c
+++ b/drivers/misc/pvpanic.c
@@ -8,7 +8,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-#include <linux/acpi.h>
+#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/kexec.h>
#include <linux/module.h>
@@ -49,101 +49,16 @@ static struct notifier_block pvpanic_panic_nb = {
.priority = 1, /* let this called before broken drm_fb_helper */
};
-#ifdef CONFIG_ACPI
-static int pvpanic_add(struct acpi_device *device);
-static int pvpanic_remove(struct acpi_device *device);
-
-static const struct acpi_device_id pvpanic_device_ids[] = {
- { "QEMU0001", 0 },
- { "", 0 }
-};
-MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
-
-static struct acpi_driver pvpanic_driver = {
- .name = "pvpanic",
- .class = "QEMU",
- .ids = pvpanic_device_ids,
- .ops = {
- .add = pvpanic_add,
- .remove = pvpanic_remove,
- },
- .owner = THIS_MODULE,
-};
-
-static acpi_status
-pvpanic_walk_resources(struct acpi_resource *res, void *context)
-{
- struct resource r;
-
- if (acpi_dev_resource_io(res, &r)) {
-#ifdef CONFIG_HAS_IOPORT_MAP
- base = ioport_map(r.start, resource_size(&r));
- return AE_OK;
-#else
- return AE_ERROR;
-#endif
- } else if (acpi_dev_resource_memory(res, &r)) {
- base = ioremap(r.start, resource_size(&r));
- return AE_OK;
- }
-
- return AE_ERROR;
-}
-
-static int pvpanic_add(struct acpi_device *device)
-{
- int ret;
-
- ret = acpi_bus_get_status(device);
- if (ret < 0)
- return ret;
-
- if (!device->status.enabled || !device->status.functional)
- return -ENODEV;
-
- acpi_walk_resources(device->handle, METHOD_NAME__CRS,
- pvpanic_walk_resources, NULL);
-
- if (!base)
- return -ENODEV;
-
- atomic_notifier_chain_register(&panic_notifier_list,
- &pvpanic_panic_nb);
-
- return 0;
-}
-
-static int pvpanic_remove(struct acpi_device *device)
-{
-
- atomic_notifier_chain_unregister(&panic_notifier_list,
- &pvpanic_panic_nb);
- iounmap(base);
-
- return 0;
-}
-
-static int pvpanic_register_acpi_driver(void)
-{
- return acpi_bus_register_driver(&pvpanic_driver);
-}
-
-static void pvpanic_unregister_acpi_driver(void)
-{
- acpi_bus_unregister_driver(&pvpanic_driver);
-}
-#else
-static int pvpanic_register_acpi_driver(void)
-{
- return -ENODEV;
-}
-
-static void pvpanic_unregister_acpi_driver(void) {}
-#endif
-
static int pvpanic_mmio_probe(struct platform_device *pdev)
{
- base = devm_platform_ioremap_resource(pdev, 0);
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+
+ res = platform_get_mem_or_io_resource(pdev, 0);
+ if (res && resource_type(res) == IORESOURCE_IO)
+ base = devm_ioport_map(dev, res->start, resource_size(res));
+ else
+ base = devm_ioremap_resource(dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
@@ -167,30 +82,19 @@ static const struct of_device_id pvpanic_mmio_match[] = {
{}
};
+static const struct acpi_device_id pvpanic_device_ids[] = {
+ { "QEMU0001", 0 },
+ { "", 0 }
+};
+MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids);
+
static struct platform_driver pvpanic_mmio_driver = {
.driver = {
.name = "pvpanic-mmio",
.of_match_table = pvpanic_mmio_match,
+ .acpi_match_table = pvpanic_device_ids,
},
.probe = pvpanic_mmio_probe,
.remove = pvpanic_mmio_remove,
};
-
-static int __init pvpanic_mmio_init(void)
-{
- if (acpi_disabled)
- return platform_driver_register(&pvpanic_mmio_driver);
- else
- return pvpanic_register_acpi_driver();
-}
-
-static void __exit pvpanic_mmio_exit(void)
-{
- if (acpi_disabled)
- platform_driver_unregister(&pvpanic_mmio_driver);
- else
- pvpanic_unregister_acpi_driver();
-}
-
-module_init(pvpanic_mmio_init);
-module_exit(pvpanic_mmio_exit);
+module_platform_driver(pvpanic_mmio_driver);
--
2.28.0
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