linux-kernel - Re: [PATCH v8 1/3] dt/bindings: Add PIC32 clock binding documentation

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Message-ID: <20160224205758.2278.85870@quark.deferred.io>
Date:	Wed, 24 Feb 2016 12:57:58 -0800
From:	Michael Turquette <mturquette@...libre.com>
To:	Joshua Henderson <joshua.henderson@...rochip.com>,
	linux-kernel@...r.kernel.org
Cc:	linux-mips@...ux-mips.org, ralf@...ux-mips.org,
	"Purna Chandra Mandal" <purna.mandal@...rochip.com>,
	"Joshua Henderson" <joshua.henderson@...rochip.com>,
	"Stephen Boyd" <sboyd@...eaurora.org>,
	"Rob Herring" <robh+dt@...nel.org>,
	"Pawel Moll" <pawel.moll@....com>,
	"Mark Rutland" <mark.rutland@....com>,
	"Ian Campbell" <ijc+devicetree@...lion.org.uk>,
	"Kumar Gala" <galak@...eaurora.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v8 1/3] dt/bindings: Add PIC32 clock binding documentation

Quoting Joshua Henderson (2016-02-24 08:07:15)
> From: Purna Chandra Mandal <purna.mandal@...rochip.com>
> 
> Document the devicetree bindings for the clock driver found on Microchip
> PIC32 class devices.
> 
> Signed-off-by: Purna Chandra Mandal <purna.mandal@...rochip.com>
> Signed-off-by: Joshua Henderson <joshua.henderson@...rochip.com>
> Cc: Ralf Baechle <ralf@...ux-mips.org>
> Cc: Michael Turquette <mturquette@...libre.com>
> Cc: Stephen Boyd <sboyd@...eaurora.org>
> Acked-by: Rob Herring <robh@...nel.org>

Acked-by: Michael Turquette <mturquette@...libre.com>

> ---
> Note: Please pull this complete series through the MIPS tree.
> 
> Changes since v7: None
> 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@...01200 {
> +               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@...rochip.com>
> + * 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
>