forked from rrcarlosr/Jetpack
109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
/*
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* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/pwm.h>
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#include <linux/platform_device.h>
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#include <soc/tegra/pmc.h>
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struct tegra_blink_pwm_chip {
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struct pwm_chip chip;
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struct device *dev;
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};
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static int tegra_blink_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
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int duty_ns, int period_ns)
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{
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return tegra_pmc_pwm_blink_config(duty_ns, period_ns);
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}
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static int tegra_blink_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
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{
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return tegra_pmc_pwm_blink_enable();
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}
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static void tegra_blink_pwm_disable(struct pwm_chip *chip,
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struct pwm_device *pwm)
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{
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tegra_pmc_pwm_blink_disable();
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}
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static const struct pwm_ops tegra_blink_pwm_ops = {
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.config = tegra_blink_pwm_config,
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.enable = tegra_blink_pwm_enable,
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.disable = tegra_blink_pwm_disable,
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.owner = THIS_MODULE,
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};
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static int tegra_blink_pwm_probe(struct platform_device *pdev)
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{
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struct tegra_blink_pwm_chip *pwm;
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int ret;
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pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);
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if (!pwm)
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return -ENOMEM;
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pwm->dev = &pdev->dev;
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platform_set_drvdata(pdev, pwm);
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pwm->chip.dev = &pdev->dev;
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pwm->chip.ops = &tegra_blink_pwm_ops;
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pwm->chip.base = -1;
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pwm->chip.npwm = 1;
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ret = pwmchip_add(&pwm->chip);
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if (ret < 0) {
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dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int tegra_blink_pwm_remove(struct platform_device *pdev)
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{
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struct tegra_blink_pwm_chip *pc = platform_get_drvdata(pdev);
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if (WARN_ON(!pc))
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return -ENODEV;
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return pwmchip_remove(&pc->chip);
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}
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static const struct of_device_id tegra_blink_pwm_of_match[] = {
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{ .compatible = "nvidia,tegra210-pmc-blink-pwm",},
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{ }
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};
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static struct platform_driver tegra_blink_pwm_driver = {
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.driver = {
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.name = "tegra210-blink-pwm",
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.of_match_table = tegra_blink_pwm_of_match,
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},
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.probe = tegra_blink_pwm_probe,
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.remove = tegra_blink_pwm_remove,
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};
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module_platform_driver(tegra_blink_pwm_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("NVIDIA Corporation");
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