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MPL115 supports shutdown gpio which can be used to set the state to low power mode. Power from all internal circuits and registers is removed. This is done by pulling the SHDN pin to low. This patch enables runtime PM on MPL115 to increase power savings. According to spec., a wakeup time period of ~5 ms exists between waking up and actually communicating with the device. This is implemented using sleep delay. Signed-off-by: Rajat Khandelwal <rajat.khandelwal@linux.intel.com> Link: https://lore.kernel.org/r/20221010173720.568916-1-rajat.khandelwal@linux.intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
26 lines
581 B
C
26 lines
581 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Freescale MPL115A pressure/temperature sensor
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*
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* Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
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* Copyright (c) 2016 Akinobu Mita <akinobu.mita@gmail.com>
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*/
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#include <linux/pm_runtime.h>
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#ifndef _MPL115_H_
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#define _MPL115_H_
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struct mpl115_ops {
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int (*init)(struct device *);
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int (*read)(struct device *, u8);
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int (*write)(struct device *, u8, u8);
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};
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int mpl115_probe(struct device *dev, const char *name,
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const struct mpl115_ops *ops);
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/*PM ops */
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extern const struct dev_pm_ops mpl115_dev_pm_ops;
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#endif
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