The TZ1090 High End Peripheral (HEP) register region controls several
clocks for the HEP peripherals.
Create a clock binding for the provider of these clocks, and a header
file in <dt-bindings/clock/> for enumerating the provided clocks.
There are 3 clocks provided, the 2D block clock, the PDP/PDI clocks, and
the DDR enable clock which is fed back into the TOP clocks for dividing
down.
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Mike Turquette <mturquette@xxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
Cc: linux-metag@xxxxxxxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx
---
Changes since v1 (patch 15):
- New patch.
- Convert explicit DT representation of clock infrastructure using
generic bindings to several TZ1090 specific bindings representing
groups of TZ1090 clocks.
---
.../bindings/clock/img,tz1090-hep-cru.txt | 53 ++++++++++++++++++++++
include/dt-bindings/clock/tz1090-hep.h | 19 ++++++++
2 files changed, 72 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/img,tz1090-hep-cru.txt
create mode 100644 include/dt-bindings/clock/tz1090-hep.h
diff --git a/Documentation/devicetree/bindings/clock/img,tz1090-hep-cru.txt b/Documentation/devicetree/bindings/clock/img,tz1090-hep-cru.txt
new file mode 100644
index 0000000..e5acdd6
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/img,tz1090-hep-cru.txt
@@ -0,0 +1,53 @@
+Binding for TZ1090 High end peripheral clocks.
+
+This binding uses the common clock binding[1]. It represents the clocks
+controlled from the high end peripheral registers of the TZ1090:
+
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible : Shall be "img,tz1090-hep-cru".
+- #clock-cells : From common clock binding; shall be set to 1.
+- reg : Base address for clock registers in high end peripheral
+ register region.
+- clocks : Clock specifiers for each input clock.
+- clock-names : Labels for each input clock specified in clocks.
+ Can contain the following entries:
+ "sys" : Main system clock.
+ "sys_x2_undeleted" : System clock before division and
+ deletion.
+
+Optional properties:
+- clock-indices : From common clock binding. Allows clock-output-names to
+ be sparse.
+- clock-output-names : From common clock binding. May be used to name specific
+ output clocks so that other clock providers can find
+ the clocks by name before the provider has been
+ instantiated. Can contain:
+ "sys_2d", "ddr_en", "sys_pdp"
+
+Clock Specifier Definition:
+- <1st-cell>: Output clock number. Use constants from
+ <dt-bindings/clock/tz1090-hep.h>.
+
+Examples:
+ hep_cru: hep_cru {
+ compatible = "img,tz1090-hep-cru";
+ #clock-cells = <1>;
+ reg = <0x02008c00 0x08>;
+ /* input clocks */
+ clocks = <&top_clks CLK_TOP_SYS>,
+ <&top_clks CLK_TOP_SYS_X2_UNDELETED>;
+ clock-names = "sys",
+ "sys_x2_undeleted";
+ /* output clocks for other clock providers */
+ clock-indices = <CLK_HEP_DDR_EN>;
+ clock-output-names = "ddr_en";
+ };
+
+ pdp {
+ ...
+ clocks = <&hep_clks CLK_HEP_PDP>;
+ clock-names = "pdp";
+ ...
+ };
diff --git a/include/dt-bindings/clock/tz1090-hep.h b/include/dt-bindings/clock/tz1090-hep.h
new file mode 100644
index 0000000..44398ef
--- /dev/null
+++ b/include/dt-bindings/clock/tz1090-hep.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2013-2014 Imagination Technologies Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _DT_BINDINGS_CLK_TZ1090_HEP_H
+#define _DT_BINDINGS_CLK_TZ1090_HEP_H
+
+/* CR_HEP_CLK_EN - High End Peripheral clocks */
+#define CLK_HEP_2D 0
+#define CLK_HEP_DDR_EN 1
+#define CLK_HEP_PDP 2
+
+#define CLK_HEP_MAX 3
+
+#endif
--
2.0.4
--
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