linux-kernel - Re: [PATCH v5 2/3] clocksource: keystone: add bindings for keystone timer

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Date:	Wed, 5 Feb 2014 08:39:04 -0600
From:	Rob Herring <robherring2@...il.com>
To:	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
Cc:	Santosh Shilimkar <santosh.shilimkar@...com>,
	Rob Landley <rob@...dley.net>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Kumar Gala <galak@...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>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Grygorii Strashko <grygorii.strashko@...com>
Subject: Re: [PATCH v5 2/3] clocksource: keystone: add bindings for keystone timer

On Wed, Feb 5, 2014 at 7:47 AM, Ivan Khoronzhuk <ivan.khoronzhuk@...com> wrote:
> This patch provides bindings for the 64-bit timer in the KeyStone
> architecture devices. The timer can be configured as a general-purpose 64-bit
> timer, dual general-purpose 32-bit timers. When configured as dual 32-bit
> timers, each half can operate in conjunction (chain mode) or independently
> (unchained mode) of each other.

This is software configurable or h/w design time configurations?

Rob

>
> It is global timer is a free running up-counter and can generate interrupt
> when the counter reaches preset counter values.
>
> Documentation:
> http://www.ti.com/lit/ug/sprugv5a/sprugv5a.pdf
>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@...com>
> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...com>
> ---
>  .../bindings/timer/ti,keystone-timer.txt           | 29 ++++++++++++++++++++++
>  1 file changed, 29 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/timer/ti,keystone-timer.txt
>
> diff --git a/Documentation/devicetree/bindings/timer/ti,keystone-timer.txt b/Documentation/devicetree/bindings/timer/ti,keystone-timer.txt
> new file mode 100644
> index 0000000..5fbe361
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/timer/ti,keystone-timer.txt
> @@ -0,0 +1,29 @@
> +* Device tree bindings for Texas instruments Keystone timer
> +
> +This document provides bindings for the 64-bit timer in the KeyStone
> +architecture devices. The timer can be configured as a general-purpose 64-bit
> +timer, dual general-purpose 32-bit timers. When configured as dual 32-bit
> +timers, each half can operate in conjunction (chain mode) or independently
> +(unchained mode) of each other.
> +
> +It is global timer is a free running up-counter and can generate interrupt
> +when the counter reaches preset counter values.
> +
> +Documentation:
> +http://www.ti.com/lit/ug/sprugv5a/sprugv5a.pdf
> +
> +Required properties:
> +
> +- compatible : should be "ti,keystone-timer".
> +- reg : specifies base physical address and count of the registers.
> +- interrupts : interrupt generated by the timer.
> +- clocks : the clock feeding the timer clock.
> +
> +Example:
> +
> +timer@...0000 {
> +       compatible = "ti,keystone-timer";
> +       reg = <0x022f0000 0x80>;
> +       interrupts = <GIC_SPI 110 IRQ_TYPE_EDGE_RISING>;
> +       clocks = <&clktimer15>;
> +};
> --
> 1.8.3.2
>
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