Commit cca8d059 authored by Laurent Pinchart's avatar Laurent Pinchart
Browse files

clocksource: sh_mtu2: Add DT support 



Document DT bindings and parse them in the MTU2 driver.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: default avatarWolfram Sang <wsa@sang-engineering.com>
parent 3e29b554

Documentation/devicetree/bindings/timer/renesas,mtu2.txt

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+39 −0
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* Renesas R-Car Multi-Function Timer Pulse Unit 2 (MTU2)



The MTU2 is a multi-purpose, multi-channel timer/counter with configurable

clock inputs and programmable compare match.



Channels share hardware resources but their counter and compare match value

are independent. The MTU2 hardware supports five channels indexed from 0 to 4.



Required Properties:



  - compatible: must contain "renesas,mtu2"



  - reg: base address and length of the registers block for the timer module.



  - interrupts: interrupt specifiers for the timer, one for each entry in

    interrupt-names.

  - interrupt-names: must contain one entry named "tgi?a" for each enabled

    channel, where "?" is the channel index expressed as one digit from "0" to

    "4".



  - clocks: a list of phandle + clock-specifier pairs, one for each entry

    in clock-names.

  - clock-names: must contain "fck" for the functional clock.





Example: R7S72100 (RZ/A1H) MTU2 node



	mtu2: timer@fcff0000 {

		compatible = "renesas,mtu2";

		reg = <0xfcff0000 0x400>;

		interrupts = <0 139 IRQ_TYPE_LEVEL_HIGH>,

			     <0 146 IRQ_TYPE_LEVEL_HIGH>,

			     <0 150 IRQ_TYPE_LEVEL_HIGH>,

			     <0 154 IRQ_TYPE_LEVEL_HIGH>,

			     <0 159 IRQ_TYPE_LEVEL_HIGH>;

		interrupt-names = "tgi0a", "tgi1a", "tgi2a", "tgi3a", "tgi4a";

		clocks = <&mstp3_clks R7S72100_CLK_MTU2>;

		clock-names = "fck";

	};

drivers/clocksource/sh_mtu2.c

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Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include <linux/ioport.h>

#include <linux/irq.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/pm_domain.h>

#include <linux/pm_runtime.h>
@@ -500,11 +501,18 @@ static const struct platform_device_id sh_mtu2_id_table[] = { 
};

MODULE_DEVICE_TABLE(platform, sh_mtu2_id_table);



static const struct of_device_id sh_mtu2_of_table[] __maybe_unused = {

	{ .compatible = "renesas,mtu2" },

	{ }

};

MODULE_DEVICE_TABLE(of, sh_mtu2_of_table);



static struct platform_driver sh_mtu2_device_driver = {

	.probe		= sh_mtu2_probe,

	.remove		= sh_mtu2_remove,

	.driver		= {

		.name	= "sh_mtu2",

		.of_match_table = of_match_ptr(sh_mtu2_of_table),

	},

	.id_table	= sh_mtu2_id_table,

};