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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <pwm.h>
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#include <asm/test.h>
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enum {
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NUM_CHANNELS = 3,
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};
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/**
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* struct sandbox_pwm_chan - a sandbox PWM channel
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*
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* @period_ns: Period of the PWM in nanoseconds
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* @duty_ns: Current duty cycle of the PWM in nanoseconds
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* @enable: true if the PWM is enabled
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* @polarity: true if the PWM polarity is active high
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*/
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struct sandbox_pwm_chan {
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uint period_ns;
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uint duty_ns;
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bool enable;
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bool polarity;
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};
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struct sandbox_pwm_priv {
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struct sandbox_pwm_chan chan[NUM_CHANNELS];
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};
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int sandbox_pwm_get_config(struct udevice *dev, uint channel, uint *period_nsp,
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uint *duty_nsp, bool *enablep, bool *polarityp)
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{
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struct sandbox_pwm_priv *priv = dev_get_priv(dev);
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struct sandbox_pwm_chan *chan;
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if (channel >= NUM_CHANNELS)
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return -ENOSPC;
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chan = &priv->chan[channel];
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*period_nsp = chan->period_ns;
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*duty_nsp = chan->duty_ns;
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*enablep = chan->enable;
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*polarityp = chan->polarity;
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return 0;
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}
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static int sandbox_pwm_set_config(struct udevice *dev, uint channel,
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uint period_ns, uint duty_ns)
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{
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struct sandbox_pwm_priv *priv = dev_get_priv(dev);
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struct sandbox_pwm_chan *chan;
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if (channel >= NUM_CHANNELS)
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return -ENOSPC;
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chan = &priv->chan[channel];
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chan->period_ns = period_ns;
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chan->duty_ns = duty_ns;
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return 0;
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}
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static int sandbox_pwm_set_enable(struct udevice *dev, uint channel,
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bool enable)
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{
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struct sandbox_pwm_priv *priv = dev_get_priv(dev);
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struct sandbox_pwm_chan *chan;
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if (channel >= NUM_CHANNELS)
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return -ENOSPC;
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chan = &priv->chan[channel];
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chan->enable = enable;
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return 0;
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}
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static int sandbox_pwm_set_invert(struct udevice *dev, uint channel,
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bool polarity)
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{
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struct sandbox_pwm_priv *priv = dev_get_priv(dev);
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struct sandbox_pwm_chan *chan;
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if (channel >= NUM_CHANNELS)
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return -ENOSPC;
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chan = &priv->chan[channel];
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chan->polarity = polarity;
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return 0;
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}
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static const struct pwm_ops sandbox_pwm_ops = {
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.set_config = sandbox_pwm_set_config,
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.set_enable = sandbox_pwm_set_enable,
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.set_invert = sandbox_pwm_set_invert,
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};
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static const struct udevice_id sandbox_pwm_ids[] = {
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{ .compatible = "sandbox,pwm" },
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{ }
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};
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U_BOOT_DRIVER(warm_pwm_sandbox) = {
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.name = "pwm_sandbox",
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.id = UCLASS_PWM,
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.of_match = sandbox_pwm_ids,
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.ops = &sandbox_pwm_ops,
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.priv_auto = sizeof(struct sandbox_pwm_priv),
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};
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