On Tuesday, April 08, 2014 12:06:53 AM Zhang Rui wrote:
> Only certain kind of ACPI device objects can be enumerated to platform bus.
> These ACPI device objects include
> 1. ACPI device objects that have _HID control method.
> 2. some ACPI device objects that have Linux specified HID strings.
>
> In order to distinguish those device objects from the others, a new flag
> platform_id and a new function acpi_add_platform_id() are introduced
> in this patch.
>
> Currently, only devices with _HID method have this flag set.
> If you want platform devices to be created for device objects without _HID,
> use acpi_add_platform_id() when adding artificial Linux-specific ID strings
> to them.
>
> Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
It looks like [12/12] should be folded into this one or bisection may be broken
for somebody.
> ---
> drivers/acpi/scan.c | 9 ++++++++-
> include/acpi/acpi_bus.h | 3 ++-
> 2 files changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index c82ab73..451e7d9 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -1730,6 +1730,13 @@ static void acpi_add_id(struct acpi_device_pnp *pnp, const char *dev_id)
> pnp->type.hardware_id = 1;
> }
>
> +static void acpi_add_platform_id(struct acpi_device_pnp *pnp,
> + const char *dev_id)
> +{
> + acpi_add_id(pnp, dev_id);
> + pnp->type.platform_id = 1;
> +}
> +
> /*
> * Old IBM workstations have a DSDT bug wherein the SMBus object
> * lacks the SMBUS01 HID and the methods do not have the necessary "_"
> @@ -1794,7 +1801,7 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
> }
>
> if (info->valid & ACPI_VALID_HID)
> - acpi_add_id(pnp, info->hardware_id.string);
> + acpi_add_platform_id(pnp, info->hardware_id.string);
> if (info->valid & ACPI_VALID_CID) {
> cid_list = &info->compatible_id_list;
> for (i = 0; i < cid_list->count; i++)
> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
> index ba679af..ec92ad3 100644
> --- a/include/acpi/acpi_bus.h
> +++ b/include/acpi/acpi_bus.h
> @@ -233,7 +233,8 @@ struct acpi_hardware_id {
> struct acpi_pnp_type {
> u32 hardware_id:1;
> u32 bus_address:1;
> - u32 reserved:30;
> + u32 platform_id:1;
> + u32 reserved:29;
> };
>
> struct acpi_device_pnp {
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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