[J-u-boot.git] / drivers / pwm / sandbox_pwm.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2015 Google, Inc
 * Written by Simon Glass <[email protected]>
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <pwm.h>
#include <asm/test.h>

enum {
	NUM_CHANNELS	= 3,
};

/**
 * struct sandbox_pwm_chan - a sandbox PWM channel
 *
 * @period_ns: Period of the PWM in nanoseconds
 * @duty_ns: Current duty cycle of the PWM in nanoseconds
 * @enable: true if the PWM is enabled
 * @polarity: true if the PWM polarity is active high
 */
struct sandbox_pwm_chan {
	uint period_ns;
	uint duty_ns;
	bool enable;
	bool polarity;
};

struct sandbox_pwm_priv {
	struct sandbox_pwm_chan chan[NUM_CHANNELS];
};

int sandbox_pwm_get_config(struct udevice *dev, uint channel, uint *period_nsp,
			   uint *duty_nsp, bool *enablep, bool *polarityp)
{
	struct sandbox_pwm_priv *priv = dev_get_priv(dev);
	struct sandbox_pwm_chan *chan;

	if (channel >= NUM_CHANNELS)
		return -ENOSPC;
	chan = &priv->chan[channel];
	*period_nsp = chan->period_ns;
	*duty_nsp = chan->duty_ns;
	*enablep = chan->enable;
	*polarityp = chan->polarity;

	return 0;
}

static int sandbox_pwm_set_config(struct udevice *dev, uint channel,
				  uint period_ns, uint duty_ns)
{
	struct sandbox_pwm_priv *priv = dev_get_priv(dev);
	struct sandbox_pwm_chan *chan;

	if (channel >= NUM_CHANNELS)
		return -ENOSPC;
	chan = &priv->chan[channel];
	chan->period_ns = period_ns;
	chan->duty_ns = duty_ns;

	return 0;
}

static int sandbox_pwm_set_enable(struct udevice *dev, uint channel,
				  bool enable)
{
	struct sandbox_pwm_priv *priv = dev_get_priv(dev);
	struct sandbox_pwm_chan *chan;

	if (channel >= NUM_CHANNELS)
		return -ENOSPC;
	chan = &priv->chan[channel];
	chan->enable = enable;

	return 0;
}

static int sandbox_pwm_set_invert(struct udevice *dev, uint channel,
				  bool polarity)
{
	struct sandbox_pwm_priv *priv = dev_get_priv(dev);
	struct sandbox_pwm_chan *chan;

	if (channel >= NUM_CHANNELS)
		return -ENOSPC;
	chan = &priv->chan[channel];
	chan->polarity = polarity;

	return 0;
}

static const struct pwm_ops sandbox_pwm_ops = {
	.set_config	= sandbox_pwm_set_config,
	.set_enable	= sandbox_pwm_set_enable,
	.set_invert	= sandbox_pwm_set_invert,
};

static const struct udevice_id sandbox_pwm_ids[] = {
	{ .compatible = "sandbox,pwm" },
	{ }
};

U_BOOT_DRIVER(warm_pwm_sandbox) = {
	.name		= "pwm_sandbox",
	.id		= UCLASS_PWM,
	.of_match	= sandbox_pwm_ids,
	.ops		= &sandbox_pwm_ops,
	.priv_auto_alloc_size	= sizeof(struct sandbox_pwm_priv),
};
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
43b41566 SG	2	/*
	3	* Copyright (c) 2015 Google, Inc
	4	* Written by Simon Glass <[email protected]>
43b41566 SG	5	*/
	6
	7	#include <common.h>
	8	#include <dm.h>
	9	#include <errno.h>
	10	#include <pwm.h>
	11	#include <asm/test.h>
	12
43b41566 SG	13	enum {
	14	NUM_CHANNELS = 3,
	15	};
	16
5d9a88f4 SG	17	/**
	18	* struct sandbox_pwm_chan - a sandbox PWM channel
	19	*
	20	* @period_ns: Period of the PWM in nanoseconds
	21	* @duty_ns: Current duty cycle of the PWM in nanoseconds
	22	* @enable: true if the PWM is enabled
	23	* @polarity: true if the PWM polarity is active high
	24	*/
43b41566 SG	25	struct sandbox_pwm_chan {
	26	uint period_ns;
	27	uint duty_ns;
	28	bool enable;
5540e25a	29	bool polarity;
43b41566 SG	30	};
	31
	32	struct sandbox_pwm_priv {
	33	struct sandbox_pwm_chan chan[NUM_CHANNELS];
	34	};
	35
5d9a88f4 SG	36	int sandbox_pwm_get_config(struct udevice dev, uint channel, uint period_nsp,
	37	uint duty_nsp, bool enablep, bool *polarityp)
	38	{
	39	struct sandbox_pwm_priv *priv = dev_get_priv(dev);
	40	struct sandbox_pwm_chan *chan;
	41
	42	if (channel >= NUM_CHANNELS)
	43	return -ENOSPC;
	44	chan = &priv->chan[channel];
	45	*period_nsp = chan->period_ns;
	46	*duty_nsp = chan->duty_ns;
	47	*enablep = chan->enable;
	48	*polarityp = chan->polarity;
	49
	50	return 0;
	51	}
	52
43b41566 SG	53	static int sandbox_pwm_set_config(struct udevice *dev, uint channel,
	54	uint period_ns, uint duty_ns)
	55	{
	56	struct sandbox_pwm_priv *priv = dev_get_priv(dev);
	57	struct sandbox_pwm_chan *chan;
	58
	59	if (channel >= NUM_CHANNELS)
	60	return -ENOSPC;
	61	chan = &priv->chan[channel];
	62	chan->period_ns = period_ns;
	63	chan->duty_ns = duty_ns;
	64
	65	return 0;
	66	}
	67
	68	static int sandbox_pwm_set_enable(struct udevice *dev, uint channel,
	69	bool enable)
	70	{
	71	struct sandbox_pwm_priv *priv = dev_get_priv(dev);
	72	struct sandbox_pwm_chan *chan;
	73
	74	if (channel >= NUM_CHANNELS)
	75	return -ENOSPC;
	76	chan = &priv->chan[channel];
	77	chan->enable = enable;
	78
	79	return 0;
	80	}
	81
5540e25a KY	82	static int sandbox_pwm_set_invert(struct udevice *dev, uint channel,
	83	bool polarity)
	84	{
	85	struct sandbox_pwm_priv *priv = dev_get_priv(dev);
	86	struct sandbox_pwm_chan *chan;
	87
	88	if (channel >= NUM_CHANNELS)
	89	return -ENOSPC;
	90	chan = &priv->chan[channel];
	91	chan->polarity = polarity;
	92
	93	return 0;
	94	}
	95
43b41566 SG	96	static const struct pwm_ops sandbox_pwm_ops = {
	97	.set_config = sandbox_pwm_set_config,
	98	.set_enable = sandbox_pwm_set_enable,
5540e25a	99	.set_invert = sandbox_pwm_set_invert,
43b41566 SG	100	};
	101
	102	static const struct udevice_id sandbox_pwm_ids[] = {
	103	{ .compatible = "sandbox,pwm" },
	104	{ }
	105	};
	106
	107	U_BOOT_DRIVER(warm_pwm_sandbox) = {
	108	.name = "pwm_sandbox",
	109	.id = UCLASS_PWM,
	110	.of_match = sandbox_pwm_ids,
	111	.ops = &sandbox_pwm_ops,
	112	.priv_auto_alloc_size = sizeof(struct sandbox_pwm_priv),
	113	};