1 // SPDX-License-Identifier: GPL-2.0
3  * This file is part of STM32 DAC driver
5  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
18 #include "stm32-dac-core.h"
27  * struct stm32_dac - private data of DAC driver
28  * @common:		reference to DAC common data
39 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_is_enabled()  local
43 	ret = regmap_read(dac->common->regmap, STM32_DAC_CR, &val);  in stm32_dac_is_enabled()
57 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_set_enable_state()  local
58 	struct device *dev = indio_dev->dev.parent;  in stm32_dac_set_enable_state()
64 	mutex_lock(&dac->lock);  in stm32_dac_set_enable_state()
67 		mutex_unlock(&dac->lock);  in stm32_dac_set_enable_state()
75 			mutex_unlock(&dac->lock);  in stm32_dac_set_enable_state()
80 	ret = regmap_update_bits(dac->common->regmap, STM32_DAC_CR, msk, en);  in stm32_dac_set_enable_state()
81 	mutex_unlock(&dac->lock);  in stm32_dac_set_enable_state()
83 		dev_err(&indio_dev->dev, "%s failed\n", en ?  in stm32_dac_set_enable_state()
93 	if (en && dac->common->hfsel)  in stm32_dac_set_enable_state()
112 static int stm32_dac_get_value(struct stm32_dac *dac, int channel, int *val)  in stm32_dac_get_value()  argument
117 		ret = regmap_read(dac->common->regmap, STM32_DAC_DOR1, val);  in stm32_dac_get_value()
119 		ret = regmap_read(dac->common->regmap, STM32_DAC_DOR2, val);  in stm32_dac_get_value()
124 static int stm32_dac_set_value(struct stm32_dac *dac, int channel, int val)  in stm32_dac_set_value()  argument
129 		ret = regmap_write(dac->common->regmap, STM32_DAC_DHR12R1, val);  in stm32_dac_set_value()
131 		ret = regmap_write(dac->common->regmap, STM32_DAC_DHR12R2, val);  in stm32_dac_set_value()
140 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_read_raw()  local
144 		return stm32_dac_get_value(dac, chan->channel, val);  in stm32_dac_read_raw()
146 		*val = dac->common->vref_mv;  in stm32_dac_read_raw()
147 		*val2 = chan->scan_type.realbits;  in stm32_dac_read_raw()
150 		return -EINVAL;  in stm32_dac_read_raw()
158 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_write_raw()  local
162 		return stm32_dac_set_value(dac, chan->channel, val);  in stm32_dac_write_raw()
164 		return -EINVAL;  in stm32_dac_write_raw()
172 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_debugfs_reg_access()  local
175 		return regmap_write(dac->common->regmap, reg, writeval);  in stm32_dac_debugfs_reg_access()
177 		return regmap_read(dac->common->regmap, reg, readval);  in stm32_dac_debugfs_reg_access()
208 	int ret = stm32_dac_is_enabled(indio_dev, chan->channel);  in stm32_dac_read_powerdown()
228 	ret = stm32_dac_set_enable_state(indio_dev, chan->channel, !powerdown);  in stm32_dac_write_powerdown()
279 	struct device_node *np = indio_dev->dev.of_node;  in stm32_dac_chan_of_init()
286 		dev_err(&indio_dev->dev, "Failed to read reg property\n");  in stm32_dac_chan_of_init()
295 		dev_err(&indio_dev->dev, "Invalid reg property\n");  in stm32_dac_chan_of_init()
296 		return -EINVAL;  in stm32_dac_chan_of_init()
299 	indio_dev->channels = &stm32_dac_channels[i];  in stm32_dac_chan_of_init()
305 	indio_dev->num_channels = 1;  in stm32_dac_chan_of_init()
312 	struct device_node *np = pdev->dev.of_node;  in stm32_dac_probe()
313 	struct device *dev = &pdev->dev;  in stm32_dac_probe()
315 	struct stm32_dac *dac;  in stm32_dac_probe()  local
319 		return -ENODEV;  in stm32_dac_probe()
321 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*dac));  in stm32_dac_probe()
323 		return -ENOMEM;  in stm32_dac_probe()
326 	dac = iio_priv(indio_dev);  in stm32_dac_probe()
327 	dac->common = dev_get_drvdata(pdev->dev.parent);  in stm32_dac_probe()
328 	indio_dev->name = dev_name(&pdev->dev);  in stm32_dac_probe()
329 	indio_dev->dev.of_node = pdev->dev.of_node;  in stm32_dac_probe()
330 	indio_dev->info = &stm32_dac_iio_info;  in stm32_dac_probe()
331 	indio_dev->modes = INDIO_DIRECT_MODE;  in stm32_dac_probe()
333 	mutex_init(&dac->lock);  in stm32_dac_probe()
339 	/* Get stm32-dac-core PM online */  in stm32_dac_probe()
367 	pm_runtime_get_sync(&pdev->dev);  in stm32_dac_remove()
369 	pm_runtime_disable(&pdev->dev);  in stm32_dac_remove()
370 	pm_runtime_set_suspended(&pdev->dev);  in stm32_dac_remove()
371 	pm_runtime_put_noidle(&pdev->dev);  in stm32_dac_remove()
379 	int channel = indio_dev->channels[0].channel;  in stm32_dac_suspend()
382 	/* Ensure DAC is disabled before suspend */  in stm32_dac_suspend()
385 		return ret < 0 ? ret : -EBUSY;  in stm32_dac_suspend()
395 	{ .compatible = "st,stm32-dac", },
404 		.name = "stm32-dac",
411 MODULE_ALIAS("platform:stm32-dac");
413 MODULE_DESCRIPTION("STMicroelectronics STM32 DAC driver");