[PATCH v7 1/3] dt/bindings: Add PIC32 clock binding documentation
From: Joshua Henderson
Date: Fri Feb 19 2016 - 11:26:17 EST
From: Purna Chandra Mandal <purna.mandal@xxxxxxxxxxxxx>
Document the devicetree bindings for the clock driver found on Microchip
PIC32 class devices.
Signed-off-by: Purna Chandra Mandal <purna.mandal@xxxxxxxxxxxxx>
Signed-off-by: Joshua Henderson <joshua.henderson@xxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Michael Turquette <mturquette@xxxxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
---
Note: Please pull this complete series through the MIPS tree.
Changes since v6:
- Update Microchip PIC32 clock binding document based on review
- Add header defining clocks
Changes since v5: None
Changes since v4: None
Changes since v3: None
Changes since v2:
- Force lowercase in PIC32 clock binding documentation
Changes since v1: None
---
.../devicetree/bindings/clock/microchip,pic32.txt | 39 ++++++++++++++++++
include/dt-bindings/clock/microchip,pic32-clock.h | 42 ++++++++++++++++++++
2 files changed, 81 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/microchip,pic32.txt
create mode 100644 include/dt-bindings/clock/microchip,pic32-clock.h
diff --git a/Documentation/devicetree/bindings/clock/microchip,pic32.txt b/Documentation/devicetree/bindings/clock/microchip,pic32.txt
new file mode 100644
index 0000000..5352718
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/microchip,pic32.txt
@@ -0,0 +1,39 @@
+Microchip PIC32 Clock Controller Binding
+----------------------------------------
+Microchip clock controller is consists of few oscillators, PLL, multiplexer
+and few divider modules.
+
+This binding uses common clock bindings.
+[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+Required properties:
+- compatible: shall be "microchip,pic32mzda-clk".
+- reg: shall contain base address and length of clock registers.
+- #clock-cells: shall be 1.
+
+Optional properties:
+- microchip,pic32mzda-sosc: shall be added only if platform has
+ secondary oscillator connected.
+
+Example:
+ rootclk: clock-controller@1f801200 {
+ compatible = "microchip,pic32mzda-clk";
+ reg = <0x1f801200 0x200>;
+ #clock-cells = <1>;
+ /* optional */
+ microchip,pic32mzda-sosc;
+ };
+
+
+The clock consumer shall specify the desired clock-output of the clock
+controller (as defined in [2]) by specifying output-id in its "clock"
+phandle cell.
+[2] include/dt-bindings/clock/microchip,pic32-clock.h
+
+For example for UART2:
+uart2: serial@2 {
+ compatible = "microchip,pic32mzda-uart";
+ reg = <>;
+ interrupts = <>;
+ clocks = <&rootclk PB2CLK>;
+};
diff --git a/include/dt-bindings/clock/microchip,pic32-clock.h b/include/dt-bindings/clock/microchip,pic32-clock.h
new file mode 100644
index 0000000..184647a6
--- /dev/null
+++ b/include/dt-bindings/clock/microchip,pic32-clock.h
@@ -0,0 +1,42 @@
+/*
+ * Purna Chandra Mandal,<purna.mandal@xxxxxxxxxxxxx>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ *
+ * This program is free software; you can distribute it and/or modify it
+ * under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#ifndef _DT_BINDINGS_CLK_MICROCHIP_PIC32_H_
+#define _DT_BINDINGS_CLK_MICROCHIP_PIC32_H_
+
+/* clock output indices */
+#define POSCCLK 0
+#define FRCCLK 1
+#define BFRCCLK 2
+#define LPRCCLK 3
+#define SOSCCLK 4
+#define FRCDIVCLK 5
+#define PLLCLK 6
+#define SCLK 7
+#define PB1CLK 8
+#define PB2CLK 9
+#define PB3CLK 10
+#define PB4CLK 11
+#define PB5CLK 12
+#define PB6CLK 13
+#define PB7CLK 14
+#define REF1CLK 15
+#define REF2CLK 16
+#define REF3CLK 17
+#define REF4CLK 18
+#define REF5CLK 19
+#define UPLLCLK 20
+#define MAXCLKS 21
+
+#endif /* _DT_BINDINGS_CLK_MICROCHIP_PIC32_H_ */
--
1.7.9.5