From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lan Tianyu Subject: [Resend PATCH V3 2/8] ACPI: Add _PLD support Date: Fri, 11 May 2012 16:08:26 +0800 Message-ID: <1336723712-7686-3-git-send-email-tianyu.lan@intel.com> References: <1336723712-7686-1-git-send-email-tianyu.lan@intel.com> Return-path: In-Reply-To: <1336723712-7686-1-git-send-email-tianyu.lan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> Sender: linux-usb-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: lenb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org Cc: linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org, sarah.a.sharp-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org, mfm-Oo0r1OC9pj9iLUuM0BA3LQ@public.gmane.org, Matthew Garrett , Lan Tianyu List-Id: linux-acpi@vger.kernel.org From: Matthew Garrett Add a simple helper function to allow drivers to obtain the physical device location data. Acked-by: Len Brown Signed-off-by: Matthew Garrett Signed-off-by: Lan Tianyu --- drivers/acpi/utils.c | 30 ++++++++++++++++++++++++++++++ include/acpi/acpi_bus.h | 31 +++++++++++++++++++++++++++++++ 2 files changed, 61 insertions(+), 0 deletions(-) diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index b002a47..adbbc1c 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -382,3 +382,33 @@ acpi_evaluate_reference(acpi_handle handle, } EXPORT_SYMBOL(acpi_evaluate_reference); + +acpi_status +acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld) +{ + acpi_status status; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *output; + + status = acpi_evaluate_object(handle, "_PLD", NULL, &buffer); + + if (ACPI_FAILURE(status)) + return status; + + output = buffer.pointer; + + if (!output || output->type != ACPI_TYPE_PACKAGE + || !output->package.count + || output->package.elements[0].type != ACPI_TYPE_BUFFER + || output->package.elements[0].buffer.length > sizeof(*pld)) { + status = AE_TYPE; + goto out; + } + + memcpy(pld, output->package.elements[0].buffer.pointer, + output->package.elements[0].buffer.length); +out: + kfree(buffer.pointer); + return status; +} +EXPORT_SYMBOL(acpi_get_physical_device_location); diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index c909984..b0d6282 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -51,6 +51,37 @@ acpi_evaluate_reference(acpi_handle handle, struct acpi_object_list *arguments, struct acpi_handle_list *list); +struct acpi_pld { + unsigned int revision:7; /* 0 */ + unsigned int ignore_colour:1; /* 7 */ + unsigned int colour:24; /* 8 */ + unsigned int width:16; /* 32 */ + unsigned int height:16; /* 48 */ + unsigned int user_visible:1; /* 64 */ + unsigned int dock:1; /* 65 */ + unsigned int lid:1; /* 66 */ + unsigned int panel:3; /* 67 */ + unsigned int vertical_pos:2; /* 70 */ + unsigned int horizontal_pos:2; /* 72 */ + unsigned int shape:4; /* 74 */ + unsigned int group_orientation:1; /* 78 */ + unsigned int group_token:8; /* 79 */ + unsigned int group_position:8; /* 87 */ + unsigned int bay:1; /* 95 */ + unsigned int ejectable:1; /* 96 */ + unsigned int ospm_eject_required:1; /* 97 */ + unsigned int cabinet_number:8; /* 98 */ + unsigned int card_cage_number:8; /* 106 */ + unsigned int reference:1; /* 114 */ + unsigned int rotation:4; /* 115 */ + unsigned int order:5; /* 119 */ + unsigned int reserved:4; /* 124 */ + unsigned int vertical_offset:16; /* 128 */ + unsigned int horizontal_offset:16; /* 144 */ +} __attribute__((__packed__)); + +acpi_status +acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld); #ifdef CONFIG_ACPI #include -- 1.7.6.rc2.8.g28eb -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html