On 2014-8-5 4:48, Randy Dunlap wrote:

On 08/04/14 08:28, Hanjun Guo wrote:

quoted

From: Graeme Gregory <redacted>

Add documentation for the guidelines of how to use ACPI
on ARM64.

Signed-off-by: Graeme Gregory <redacted>
Signed-off-by: Hanjun Guo <redacted>
---
 Documentation/arm64/arm-acpi.txt |  215 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 215 insertions(+)
 create mode 100644 Documentation/arm64/arm-acpi.txt

diff --git a/Documentation/arm64/arm-acpi.txt b/Documentation/arm64/arm-acpi.txt
new file mode 100644
index 0000000..a6e14a2
--- /dev/null
+++ b/Documentation/arm64/arm-acpi.txt

@@ -0,0 +1,215 @@
+ACPI on ARMv8 Servers
+---------------------
+

...

quoted

+
+ACPI Detection
+--------------
+
+Drivers should determine their probe() type by checking for ACPI_HANDLE,
+or .of_node, or other information in the device structure. This is
+detailed further in the "Driver Recommendations" section.
+
+In non-driver code If the presence of ACPI needs to be detected at runtime,
+then check the value of acpi_disabled. If CONFIG_ACPI not being set,

                                          If CONFIG_ACPI is not set,

Good catch, We will update it.

Thanks
Hanjun