clk: qcom: Add KPSS ACC/GCC driver

The ACC and GCC regions present in KPSSv1 contain registers to
control clocks and power to each Krait CPU and L2. For CPUfreq
purposes probe these devices and expose a mux clock that chooses
between PXO and PLL8.

Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

2 files changed, 35 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
index 1333db9acfee..382a574a5c55 100644
--- a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
+++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-acc.txt
@@ -21,10 +21,17 @@ PROPERTIES
 		    the register region. An optional second element specifies
 		    the base address and size of the alias register region.
 
+- clock-output-names:
+	Usage: optional
+	Value type: <string>
+	Definition: Name of the output clock. Typically acpuX_aux where X is a
+		    CPU number starting at 0.
+
 Example:
 
 	clock-controller@2088000 {
 		compatible = "qcom,kpss-acc-v2";
 		reg = <0x02088000 0x1000>,
 		      <0x02008000 0x1000>;
+		clock-output-names = "acpu0_aux";
 	};
diff --git a/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
new file mode 100644
index 000000000000..d1e12f16a28c
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/msm/qcom,kpss-gcc.txt
@@ -0,0 +1,28 @@
+Krait Processor Sub-system (KPSS) Global Clock Controller (GCC)
+
+PROPERTIES
+
+- compatible:
+	Usage: required
+	Value type: <string>
+	Definition: should be one of:
+			"qcom,kpss-gcc"
+
+- reg:
+	Usage: required
+	Value type: <prop-encoded-array>
+	Definition: base address and size of the register region
+
+- clock-output-names:
+	Usage: required
+	Value type: <string>
+	Definition: Name of the output clock. Typically acpu_l2_aux indicating
+		    an L2 cache auxiliary clock.
+
+Example:
+
+	l2cc: clock-controller@2011000 {
+		compatible = "qcom,kpss-gcc";
+		reg = <0x2011000 0x1000>;
+		clock-output-names = "acpu_l2_aux";
+	};