From 67bad3e5ce82b9eea2428118d909b2c8b80a71cf Mon Sep 17 00:00:00 2001 From: Lars Persson Date: Mon, 4 Apr 2016 11:23:22 +0200 Subject: clk: add device tree binding for Artpec-6 clock controller Add device tree documentation for the main clock controller in the Artpec-6 SoC. Acked-by: Rob Herring Signed-off-by: Lars Persson [sboyd@codeaurora.org: Added unit address to binding example] Signed-off-by: Stephen Boyd diff --git a/Documentation/devicetree/bindings/clock/artpec6.txt b/Documentation/devicetree/bindings/clock/artpec6.txt new file mode 100644 index 0000000..dff9cdf --- /dev/null +++ b/Documentation/devicetree/bindings/clock/artpec6.txt @@ -0,0 +1,41 @@ +* Clock bindings for Axis ARTPEC-6 chip + +The bindings are based on the clock provider binding in +Documentation/devicetree/bindings/clock/clock-bindings.txt + +External clocks: +---------------- + +There are two external inputs to the main clock controller which should be +provided using the common clock bindings. +- "sys_refclk": External 50 Mhz oscillator (required) +- "i2s_refclk": Alternate audio reference clock (optional). + +Main clock controller +--------------------- + +Required properties: +- #clock-cells: Should be <1> + See dt-bindings/clock/axis,artpec6-clkctrl.h for the list of valid identifiers. +- compatible: Should be "axis,artpec6-clkctrl" +- reg: Must contain the base address and length of the system controller +- clocks: Must contain a phandle entry for each clock in clock-names +- clock-names: Must include the external oscillator ("sys_refclk"). Optional + ones are the audio reference clock ("i2s_refclk") and the audio fractional + dividers ("frac_clk0" and "frac_clk1"). + +Examples: + +ext_clk: ext_clk { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <50000000>; +}; + +clkctrl: clkctrl@f8000000 { + #clock-cells = <1>; + compatible = "axis,artpec6-clkctrl"; + reg = <0xf8000000 0x48>; + clocks = <&ext_clk>; + clock-names = "sys_refclk"; +}; diff --git a/include/dt-bindings/clock/axis,artpec6-clkctrl.h b/include/dt-bindings/clock/axis,artpec6-clkctrl.h new file mode 100644 index 0000000..f9f04dc --- /dev/null +++ b/include/dt-bindings/clock/axis,artpec6-clkctrl.h @@ -0,0 +1,38 @@ +/* + * ARTPEC-6 clock controller indexes + * + * Copyright 2016 Axis Comunications AB. + * + * 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_ARTPEC6_CLKCTRL_H +#define DT_BINDINGS_CLK_ARTPEC6_CLKCTRL_H + +#define ARTPEC6_CLK_CPU 0 +#define ARTPEC6_CLK_CPU_PERIPH 1 +#define ARTPEC6_CLK_NAND_CLKA 2 +#define ARTPEC6_CLK_NAND_CLKB 3 +#define ARTPEC6_CLK_ETH_ACLK 4 +#define ARTPEC6_CLK_DMA_ACLK 5 +#define ARTPEC6_CLK_PTP_REF 6 +#define ARTPEC6_CLK_SD_PCLK 7 +#define ARTPEC6_CLK_SD_IMCLK 8 +#define ARTPEC6_CLK_I2S_HST 9 +#define ARTPEC6_CLK_I2S0_CLK 10 +#define ARTPEC6_CLK_I2S1_CLK 11 +#define ARTPEC6_CLK_UART_PCLK 12 +#define ARTPEC6_CLK_UART_REFCLK 13 +#define ARTPEC6_CLK_I2C 14 +#define ARTPEC6_CLK_SPI_PCLK 15 +#define ARTPEC6_CLK_SPI_SSPCLK 16 +#define ARTPEC6_CLK_SYS_TIMER 17 +#define ARTPEC6_CLK_FRACDIV_IN 18 +#define ARTPEC6_CLK_DBG_PCLK 19 + +/* This must be the highest clock index plus one. */ +#define ARTPEC6_CLK_NUMCLOCKS 20 + +#endif -- cgit v0.10.2