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clocksource: sh_mtu2: Add DT support

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Document DT bindings and parse them in the MTU2 driver.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Wolfram Sang <wsa@sang-engineering.com>
This commit is contained in:
Laurent Pinchart 2014-03-04 18:28:26 +01:00
parent 3e29b5543f
commit cca8d0596c
2 changed files with 47 additions and 0 deletions
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39
Documentation/devicetree/bindings/timer/renesas,mtu2.txt Normal file
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@ -0,0 +1,39 @@
* 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";
};

8
drivers/clocksource/sh_mtu2.c
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@ -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,
};