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| author | Mika Westerberg | 2013-01-18 14:46:01 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki | 2013-01-23 21:14:22 +0100 |
| commit | e375325ce55eb841ccda54a4472cf3b0139ea5f2 (patch) | |
| tree | 79a9a12a6d18d86d24011909904f82d476a304da /drivers/acpi/scan.c | |
| parent | clk: x86: add support for Lynxpoint LPSS clocks (diff) | |
| download | kernel-qcow2-linux-e375325ce55eb841ccda54a4472cf3b0139ea5f2.tar.gz kernel-qcow2-linux-e375325ce55eb841ccda54a4472cf3b0139ea5f2.tar.xz kernel-qcow2-linux-e375325ce55eb841ccda54a4472cf3b0139ea5f2.zip | |
ACPI / platform: create LPSS clocks if Lynxpoint devices are found during scan
Intel Lynxpoint LPSS peripheral drivers depend on LPSS clock tree being
created in order to function properly. The clock tree is exposed as a
platform driver that binds to a device named 'clk-lpt'.
To support this we modify the acpi_create_platform_device() to take one
additional parameter called flags. This is passed from
acpi_platform_device_ids[] array when acpi_create_platform_device() is
called.
We then introduce a new flag ACPI_PLATFORM_CLK which is used to tell
acpi_create_platform_device() to create the platform clocks as well.
Finally we set the ACPI_PLATFORM_CLK flags for all the Lynxpoint LPSS
devices and make sure that when this flag is set we create the
corresponding clock tree platform device.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index a85b4080c3ca..fe171aa7a98c 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -38,14 +38,14 @@ static const struct acpi_device_id acpi_platform_device_ids[] = { { "PNP0D40" }, /* Haswell LPSS devices */ - { "INT33C0", 0 }, - { "INT33C1", 0 }, - { "INT33C2", 0 }, - { "INT33C3", 0 }, - { "INT33C4", 0 }, - { "INT33C5", 0 }, - { "INT33C6", 0 }, - { "INT33C7", 0 }, + { "INT33C0", ACPI_PLATFORM_CLK }, + { "INT33C1", ACPI_PLATFORM_CLK }, + { "INT33C2", ACPI_PLATFORM_CLK }, + { "INT33C3", ACPI_PLATFORM_CLK }, + { "INT33C4", ACPI_PLATFORM_CLK }, + { "INT33C5", ACPI_PLATFORM_CLK }, + { "INT33C6", ACPI_PLATFORM_CLK }, + { "INT33C7", ACPI_PLATFORM_CLK }, { } }; @@ -1553,6 +1553,7 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, void *not_used, void **ret_not_used) { + const struct acpi_device_id *id; acpi_status status = AE_OK; struct acpi_device *device; unsigned long long sta_not_used; @@ -1568,9 +1569,10 @@ static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, if (acpi_bus_get_device(handle, &device)) return AE_CTRL_DEPTH; - if (!acpi_match_device_ids(device, acpi_platform_device_ids)) { + id = __acpi_match_device(device, acpi_platform_device_ids); + if (id) { /* This is a known good platform device. */ - acpi_create_platform_device(device); + acpi_create_platform_device(device, id->driver_data); } else if (device_attach(&device->dev) < 0) { status = AE_CTRL_DEPTH; } |