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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
121 lines
2.6 KiB
C
121 lines
2.6 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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if (channel == 2) {
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/* Pretend to have some fixed period */
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chan->period_ns = 4096;
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chan->duty_ns = duty_ns * 4096 / period_ns;
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} else {
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chan->period_ns = period_ns;
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chan->duty_ns = duty_ns;
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}
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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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