Document that Stratix10 clock bindings, and add the clock header file. The
clock header is an enumeration of all the different clocks on the Stratix10
platform.

Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
---
v4:
- remove '_' in node names
- remove stray tab
- add clock-frequency property for fixed-clocks
- put SPDX license as the very top line
v3:
- s/intc/intel for correct vendor prefix
- fixup node name to "intel,stratix10-clkmgr"
- document the required fixed-clock for oscillators
v2:
- use a single binding for the clock controller
---
 .../devicetree/bindings/clock/intc_stratix10.txt   | 51 +++++++++++++
 include/dt-bindings/clock/stratix10-clock.h        | 84 ++++++++++++++++++++++
 2 files changed, 135 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/intc_stratix10.txt
 create mode 100644 include/dt-bindings/clock/stratix10-clock.h

diff --git a/Documentation/devicetree/bindings/clock/intc_stratix10.txt b/Documentation/devicetree/bindings/clock/intc_stratix10.txt
new file mode 100644
index 0000000..0652ff1
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/intc_stratix10.txt

@@ -0,0 +1,51 @@
+Device Tree Clock bindings for Intel's SoCFPGA Stratix10 platform
+
+This binding uses the common clock binding[1].
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible : shall be
+       "intel,stratix10-clkmgr"
+
+- reg : shall be the control register offset from CLOCK_MANAGER's base for the clock.
+
+- #clock-cells : from common clock binding, shall be set to 1.
+
+- clocks : Should contain fixed-clock sources, such as oscillators.
+
+Example:
+       clkmgr: clock-controller at ffd10000 {
+               compatible = "intel,stratix10-clkmgr";
+               reg = <0xffd10000 0x1000>;
+               #clock-cells = <1>;
+
+               clocks {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       cb_intosc_hs_div2_clk: cb-intosc-hs-div2-clk {
+                               #clock-cells = <0>;
+                               compatible = "fixed-clock";
+                               clock-frequency = <25000000>;
+                       };
+
+                       cb_intosc_ls_clk: cb-intosc-ls-clk {
+                               #clock-cells = <0>;
+                               compatible = "fixed-clock";
+                               clock-frequency = <25000000>;
+                       };
+
+                       f2s_free_clk: f2s-free-clk {
+                               #clock-cells = <0>;
+                               compatible = "fixed-clock";
+                               clock-frequency = <25000000>;
+                       };
+
+                       osc1: osc1 {
+                               #clock-cells = <0>;
+                               compatible = "fixed-clock";
+                               clock-frequency = <25000000>;
+                       };
+               };
+       };

diff --git a/include/dt-bindings/clock/stratix10-clock.h b/include/dt-bindings/clock/stratix10-clock.h
new file mode 100644
index 0000000..5be885d
--- /dev/null
+++ b/include/dt-bindings/clock/stratix10-clock.h

@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier:    GPL-2.0