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"
21  * struct stm32_dac_priv - stm32 DAC core private data
24  * @common:		Common data for all DAC instances
33  * struct stm32_dac_cfg - DAC configuration
34  * @has_hfsel: DAC has high frequency control
58 	ret = regulator_enable(priv->vref);  in stm32_dac_core_hw_start()
64 	ret = clk_prepare_enable(priv->pclk);  in stm32_dac_core_hw_start()
73 	regulator_disable(priv->vref);  in stm32_dac_core_hw_start()
83 	clk_disable_unprepare(priv->pclk);  in stm32_dac_core_hw_stop()
84 	regulator_disable(priv->vref);  in stm32_dac_core_hw_stop()
89 	struct device *dev = &pdev->dev;  in stm32_dac_probe()
98 	if (!dev->of_node)  in stm32_dac_probe()
99 		return -ENODEV;  in stm32_dac_probe()
103 		return -ENOMEM;  in stm32_dac_probe()
104 	platform_set_drvdata(pdev, &priv->common);  in stm32_dac_probe()
107 		of_match_device(dev->driver->of_match_table, dev)->data;  in stm32_dac_probe()
118 	priv->common.regmap = regmap;  in stm32_dac_probe()
120 	priv->pclk = devm_clk_get(dev, "pclk");  in stm32_dac_probe()
121 	if (IS_ERR(priv->pclk)) {  in stm32_dac_probe()
122 		ret = PTR_ERR(priv->pclk);  in stm32_dac_probe()
127 	priv->vref = devm_regulator_get(dev, "vref");  in stm32_dac_probe()
128 	if (IS_ERR(priv->vref)) {  in stm32_dac_probe()
129 		ret = PTR_ERR(priv->vref);  in stm32_dac_probe()
142 	ret = regulator_get_voltage(priv->vref);  in stm32_dac_probe()
147 	priv->common.vref_mv = ret / 1000;  in stm32_dac_probe()
148 	dev_dbg(dev, "vref+=%dmV\n", priv->common.vref_mv);  in stm32_dac_probe()
162 	if (cfg && cfg->has_hfsel) {  in stm32_dac_probe()
164 		priv->common.hfsel = (clk_get_rate(priv->pclk) > 80000000UL);  in stm32_dac_probe()
167 					 priv->common.hfsel ?  in stm32_dac_probe()
174 	ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, dev);  in stm32_dac_probe()
196 	pm_runtime_get_sync(&pdev->dev);  in stm32_dac_remove()
197 	of_platform_depopulate(&pdev->dev);  in stm32_dac_remove()
198 	stm32_dac_core_hw_stop(&pdev->dev);  in stm32_dac_remove()
199 	pm_runtime_disable(&pdev->dev);  in stm32_dac_remove()
200 	pm_runtime_set_suspended(&pdev->dev);  in stm32_dac_remove()
201 	pm_runtime_put_noidle(&pdev->dev);  in stm32_dac_remove()
212 	if (priv->common.hfsel) {  in stm32_dac_core_resume()
214 		ret = regmap_update_bits(priv->common.regmap, STM32_DAC_CR,  in stm32_dac_core_resume()
249 		.compatible = "st,stm32f4-dac-core",
251 		.compatible = "st,stm32h7-dac-core",
262 		.name = "stm32-dac-core",
270 MODULE_DESCRIPTION("STMicroelectronics STM32 DAC core driver");
272 MODULE_ALIAS("platform:stm32-dac-core");