1 // SPDX-License-Identifier: GPL-2.0
3  * This file is part of STM32 DAC driver
5  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
17 #include "stm32-dac-core.h"
24  * struct stm32_dac - private data of DAC driver
25  * @common:		reference to DAC common data
33 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_is_enabled()  local
37 	ret = regmap_read(dac->common->regmap, STM32_DAC_CR, &val);  in stm32_dac_is_enabled()
51 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_set_enable_state()  local
56 	ret = regmap_update_bits(dac->common->regmap, STM32_DAC_CR, msk, en);  in stm32_dac_set_enable_state()
58 		dev_err(&indio_dev->dev, "%s failed\n", en ?  in stm32_dac_set_enable_state()
68 	if (en && dac->common->hfsel)  in stm32_dac_set_enable_state()
74 static int stm32_dac_get_value(struct stm32_dac *dac, int channel, int *val)  in stm32_dac_get_value()  argument
79 		ret = regmap_read(dac->common->regmap, STM32_DAC_DOR1, val);  in stm32_dac_get_value()
81 		ret = regmap_read(dac->common->regmap, STM32_DAC_DOR2, val);  in stm32_dac_get_value()
86 static int stm32_dac_set_value(struct stm32_dac *dac, int channel, int val)  in stm32_dac_set_value()  argument
91 		ret = regmap_write(dac->common->regmap, STM32_DAC_DHR12R1, val);  in stm32_dac_set_value()
93 		ret = regmap_write(dac->common->regmap, STM32_DAC_DHR12R2, val);  in stm32_dac_set_value()
102 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_read_raw()  local
106 		return stm32_dac_get_value(dac, chan->channel, val);  in stm32_dac_read_raw()
108 		*val = dac->common->vref_mv;  in stm32_dac_read_raw()
109 		*val2 = chan->scan_type.realbits;  in stm32_dac_read_raw()
112 		return -EINVAL;  in stm32_dac_read_raw()
120 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_write_raw()  local
124 		return stm32_dac_set_value(dac, chan->channel, val);  in stm32_dac_write_raw()
126 		return -EINVAL;  in stm32_dac_write_raw()
134 	struct stm32_dac *dac = iio_priv(indio_dev);  in stm32_dac_debugfs_reg_access()  local
137 		return regmap_write(dac->common->regmap, reg, writeval);  in stm32_dac_debugfs_reg_access()
139 		return regmap_read(dac->common->regmap, reg, readval);  in stm32_dac_debugfs_reg_access()
170 	int ret = stm32_dac_is_enabled(indio_dev, chan->channel);  in stm32_dac_read_powerdown()
190 	ret = stm32_dac_set_enable_state(indio_dev, chan->channel, !powerdown);  in stm32_dac_write_powerdown()
241 	struct device_node *np = indio_dev->dev.of_node;  in stm32_dac_chan_of_init()
248 		dev_err(&indio_dev->dev, "Failed to read reg property\n");  in stm32_dac_chan_of_init()
257 		dev_err(&indio_dev->dev, "Invalid reg property\n");  in stm32_dac_chan_of_init()
258 		return -EINVAL;  in stm32_dac_chan_of_init()
261 	indio_dev->channels = &stm32_dac_channels[i];  in stm32_dac_chan_of_init()
267 	indio_dev->num_channels = 1;  in stm32_dac_chan_of_init()
274 	struct device_node *np = pdev->dev.of_node;  in stm32_dac_probe()
276 	struct stm32_dac *dac;  in stm32_dac_probe()  local
280 		return -ENODEV;  in stm32_dac_probe()
282 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*dac));  in stm32_dac_probe()
284 		return -ENOMEM;  in stm32_dac_probe()
287 	dac = iio_priv(indio_dev);  in stm32_dac_probe()
288 	dac->common = dev_get_drvdata(pdev->dev.parent);  in stm32_dac_probe()
289 	indio_dev->name = dev_name(&pdev->dev);  in stm32_dac_probe()
290 	indio_dev->dev.parent = &pdev->dev;  in stm32_dac_probe()
291 	indio_dev->dev.of_node = pdev->dev.of_node;  in stm32_dac_probe()
292 	indio_dev->info = &stm32_dac_iio_info;  in stm32_dac_probe()
293 	indio_dev->modes = INDIO_DIRECT_MODE;  in stm32_dac_probe()
299 	return devm_iio_device_register(&pdev->dev, indio_dev);  in stm32_dac_probe()
303 	{ .compatible = "st,stm32-dac", },
311 		.name = "stm32-dac",
317 MODULE_ALIAS("platform:stm32-dac");
319 MODULE_DESCRIPTION("STMicroelectronics STM32 DAC driver");