1 // SPDX-License-Identifier: GPL-2.0
3  * This file is part of STM32 DAC driver
5  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
21 #include "stm32-dac-core.h"
24  * struct stm32_dac_priv - stm32 DAC core private data
27  * @common:		Common data for all DAC instances
36  * struct stm32_dac_cfg - DAC configuration
37  * @has_hfsel: DAC has high frequency control
61 	ret = regulator_enable(priv->vref);  in stm32_dac_core_hw_start()
67 	ret = clk_prepare_enable(priv->pclk);  in stm32_dac_core_hw_start()
76 	regulator_disable(priv->vref);  in stm32_dac_core_hw_start()
86 	clk_disable_unprepare(priv->pclk);  in stm32_dac_core_hw_stop()
87 	regulator_disable(priv->vref);  in stm32_dac_core_hw_stop()
92 	struct device *dev = &pdev->dev;  in stm32_dac_probe()
102 		return -ENOMEM;  in stm32_dac_probe()
103 	platform_set_drvdata(pdev, &priv->common);  in stm32_dac_probe()
115 	priv->common.regmap = regmap;  in stm32_dac_probe()
117 	priv->pclk = devm_clk_get(dev, "pclk");  in stm32_dac_probe()
118 	if (IS_ERR(priv->pclk))  in stm32_dac_probe()
119 		return dev_err_probe(dev, PTR_ERR(priv->pclk), "pclk get failed\n");  in stm32_dac_probe()
121 	priv->vref = devm_regulator_get(dev, "vref");  in stm32_dac_probe()
122 	if (IS_ERR(priv->vref))  in stm32_dac_probe()
123 		return dev_err_probe(dev, PTR_ERR(priv->vref), "vref get failed\n");  in stm32_dac_probe()
133 	ret = regulator_get_voltage(priv->vref);  in stm32_dac_probe()
138 	priv->common.vref_mv = ret / 1000;  in stm32_dac_probe()
139 	dev_dbg(dev, "vref+=%dmV\n", priv->common.vref_mv);  in stm32_dac_probe()
153 	if (cfg && cfg->has_hfsel) {  in stm32_dac_probe()
155 		priv->common.hfsel = (clk_get_rate(priv->pclk) > 80000000UL);  in stm32_dac_probe()
158 					 priv->common.hfsel ?  in stm32_dac_probe()
165 	ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, dev);  in stm32_dac_probe()
187 	pm_runtime_get_sync(&pdev->dev);  in stm32_dac_remove()
188 	of_platform_depopulate(&pdev->dev);  in stm32_dac_remove()
189 	stm32_dac_core_hw_stop(&pdev->dev);  in stm32_dac_remove()
190 	pm_runtime_disable(&pdev->dev);  in stm32_dac_remove()
191 	pm_runtime_set_suspended(&pdev->dev);  in stm32_dac_remove()
192 	pm_runtime_put_noidle(&pdev->dev);  in stm32_dac_remove()
201 	if (priv->common.hfsel) {  in stm32_dac_core_resume()
203 		ret = regmap_set_bits(priv->common.regmap, STM32_DAC_CR,  in stm32_dac_core_resume()
237 		.compatible = "st,stm32f4-dac-core",
239 		.compatible = "st,stm32h7-dac-core",
250 		.name = "stm32-dac-core",
258 MODULE_DESCRIPTION("STMicroelectronics STM32 DAC core driver");
260 MODULE_ALIAS("platform:stm32-dac-core");