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pwm: jz4740: Add support for devicetree

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Add support for probing the pwm-jz4740 directly from devicetree.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Paul Cercueil 2018-01-06 17:58:42 +01:00 committed by Thierry Reding
parent 174dcc8eae
commit cc20173304
2 changed files with 39 additions and 0 deletions
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25
Documentation/devicetree/bindings/pwm/ingenic,jz47xx-pwm.txt Normal file
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@ -0,0 +1,25 @@
Ingenic JZ47xx PWM Controller
=============================
Required properties:
- compatible: One of:
* "ingenic,jz4740-pwm"
* "ingenic,jz4770-pwm"
* "ingenic,jz4780-pwm"
- #pwm-cells: Should be 3. See pwm.txt in this directory for a description
of the cells format.
- clocks : phandle to the external clock.
- clock-names : Should be "ext".
Example:
pwm: pwm@10002000 {
compatible = "ingenic,jz4740-pwm";
reg = <0x10002000 0x1000>;
#pwm-cells = <3>;
clocks = <&ext>;
clock-names = "ext";
};

14
drivers/pwm/pwm-jz4740.c
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@ -18,6 +18,7 @@
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
@ -174,6 +175,8 @@ static int jz4740_pwm_probe(struct platform_device *pdev)
jz4740->chip.ops = &jz4740_pwm_ops;
jz4740->chip.npwm = NUM_PWM;
jz4740->chip.base = -1;
jz4740->chip.of_xlate = of_pwm_xlate_with_flags;
jz4740->chip.of_pwm_n_cells = 3;
platform_set_drvdata(pdev, jz4740);
@ -187,9 +190,20 @@ static int jz4740_pwm_remove(struct platform_device *pdev)
return pwmchip_remove(&jz4740->chip);
}
#ifdef CONFIG_OF
static const struct of_device_id jz4740_pwm_dt_ids[] = {
{ .compatible = "ingenic,jz4740-pwm", },
{ .compatible = "ingenic,jz4770-pwm", },
{ .compatible = "ingenic,jz4780-pwm", },
{},
};
MODULE_DEVICE_TABLE(of, jz4740_pwm_dt_ids);
#endif
static struct platform_driver jz4740_pwm_driver = {
.driver = {
.name = "jz4740-pwm",
.of_match_table = of_match_ptr(jz4740_pwm_dt_ids),
},
.probe = jz4740_pwm_probe,
.remove = jz4740_pwm_remove,