On Tue, Jun 14, 2016 at 8:56 AM, Adam Thomson Adam.Thomson.Opensource@diasemi.com wrote:
For device nodes in both DT and ACPI, it possible to have named child nodes which contain properties (an existing example being gpio-leds). This adds a function to find a named child node for a device which can be used by drivers for property retrieval.
For DT data node name matching, of_node_cmp() and similar functions are made available outside of CONFIG_OF block so the new function can reference these for DT and non-DT builds.
For ACPI data node name matching, a helper function is also added which returns false if CONFIG_ACPI is not set, otherwise it performs a string comparison on the data node name. This avoids using the acpi_data_node struct for non CONFIG_ACPI builds, which would otherwise cause a build failure.
Signed-off-by: Adam Thomson Adam.Thomson.Opensource@diasemi.com Tested-by: Sathyanarayana Nujella sathyanarayana.nujella@intel.com
Changes in v3:
- Move of_*_cmp() functions in of.h outside of CONFIG_OF block so they are available for non-DT builds
- In device_get_named_child_node(), use of_node_cmp() helper macro instead of strcasecmp() (node names not alway case insensitive, depending on platform).
Changes in v2:
- Rebase to v4.7-rc1
drivers/base/property.c | 28 ++++++++++++++++++++++++++++ include/acpi/acpi_bus.h | 7 +++++++ include/linux/acpi.h | 6 ++++++ include/linux/of.h | 14 +++++++------- include/linux/property.h | 3 +++ 5 files changed, 51 insertions(+), 7 deletions(-)
Acked-by: Rob Herring robh@kernel.org