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ACPI: platform: Ignore SMB0001 only when it has resources 

After switching i2c-scmi driver to be a platform one, it stopped
being enumerated on number of Kontron platforms, because it's
listed in the forbidden_id_list.

To resolve the situation, add a flag to driver data to allow devices
with no resources in _CRS to be enumerated via platform bus.

Fixes: 03d4287add ("i2c: scmi: Convert to be a platform driver")
Closes: https://lore.kernel.org/r/60c1756765b9a3f1eab0dcbd84f59f00fe1caf48.camel@kontron.com
Link: https://lore.kernel.org/r/20230621151652.79579-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
[ rjw: Move has_resource definition to the block in which it is used and
  initialize it to 'false' ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Andy Shevchenko 2023-07-03 15:14:08 +03:00 committed by Rafael J. Wysocki
parent 2b5ae96049
commit cefbd80bf5
1 changed files with 28 additions and 3 deletions
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31
drivers/acpi/acpi_platform.c
View File

@ -9,6 +9,7 @@
*/
#include <linux/acpi.h>
#include <linux/bits.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/kernel.h>
@ -19,13 +20,16 @@
#include "internal.h"
/* Exclude devices that have no _CRS resources provided */
#define ACPI_ALLOW_WO_RESOURCES BIT(0)
static const struct acpi_device_id forbidden_id_list[] = {
{"ACPI0009", 0}, /* IOxAPIC */
{"ACPI000A", 0}, /* IOAPIC */
{"PNP0000", 0}, /* PIC */
{"PNP0100", 0}, /* Timer */
{"PNP0200", 0}, /* AT DMA Controller */
{"SMB0001", 0}, /* ACPI SMBUS virtual device */
{"SMB0001", ACPI_ALLOW_WO_RESOURCES}, /* ACPI SMBUS virtual device */
{ }
};
@ -83,6 +87,15 @@ static void acpi_platform_fill_resource(struct acpi_device *adev,
dest->parent = pci_find_resource(to_pci_dev(parent), dest);
}
static unsigned int acpi_platform_resource_count(struct acpi_resource *ares, void *data)
{
bool *has_resources = data;
*has_resources = true;
return AE_CTRL_TERMINATE;
}
/**
* acpi_create_platform_device - Create platform device for ACPI device node
* @adev: ACPI device node to create a platform device for.
@ -100,6 +113,7 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev,
struct acpi_device *parent = acpi_dev_parent(adev);
struct platform_device *pdev = NULL;
struct platform_device_info pdevinfo;
const struct acpi_device_id *match;
struct resource_entry *rentry;
struct list_head resource_list;
struct resource *resources = NULL;
@ -109,8 +123,19 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev,
if (adev->physical_node_count)
return NULL;
if (!acpi_match_device_ids(adev, forbidden_id_list))
return ERR_PTR(-EINVAL);
match = acpi_match_acpi_device(forbidden_id_list, adev);
if (match) {
if (match->driver_data & ACPI_ALLOW_WO_RESOURCES) {
bool has_resources = false;
acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
acpi_platform_resource_count, &has_resources);
if (has_resources)
return ERR_PTR(-EINVAL);
} else {
return ERR_PTR(-EINVAL);
}
}
INIT_LIST_HEAD(&resource_list);
count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);