1 // SPDX-License-Identifier: GPL-2.0-only
19 /* STM32 VREFBUF registers */
22 /* STM32 VREFBUF CSR bitfields */
47 	ret = pm_runtime_resume_and_get(priv->dev);  in stm32_vrefbuf_enable()
51 	val = readl_relaxed(priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_enable()
53 	writel_relaxed(val, priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_enable()
56 	 * Vrefbuf startup time depends on external capacitor: wait here for  in stm32_vrefbuf_enable()
61 	ret = readl_poll_timeout(priv->base + STM32_VREFBUF_CSR, val,  in stm32_vrefbuf_enable()
64 		dev_err(&rdev->dev, "stm32 vrefbuf timed out!\n");  in stm32_vrefbuf_enable()
65 		val = readl_relaxed(priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_enable()
67 		writel_relaxed(val, priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_enable()
70 	pm_runtime_mark_last_busy(priv->dev);  in stm32_vrefbuf_enable()
71 	pm_runtime_put_autosuspend(priv->dev);  in stm32_vrefbuf_enable()
82 	ret = pm_runtime_resume_and_get(priv->dev);  in stm32_vrefbuf_disable()
86 	val = readl_relaxed(priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_disable()
88 	writel_relaxed(val, priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_disable()
90 	pm_runtime_mark_last_busy(priv->dev);  in stm32_vrefbuf_disable()
91 	pm_runtime_put_autosuspend(priv->dev);  in stm32_vrefbuf_disable()
101 	ret = pm_runtime_resume_and_get(priv->dev);  in stm32_vrefbuf_is_enabled()
105 	ret = readl_relaxed(priv->base + STM32_VREFBUF_CSR) & STM32_ENVR;  in stm32_vrefbuf_is_enabled()
107 	pm_runtime_mark_last_busy(priv->dev);  in stm32_vrefbuf_is_enabled()
108 	pm_runtime_put_autosuspend(priv->dev);  in stm32_vrefbuf_is_enabled()
120 	ret = pm_runtime_resume_and_get(priv->dev);  in stm32_vrefbuf_set_voltage_sel()
124 	val = readl_relaxed(priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_set_voltage_sel()
126 	writel_relaxed(val, priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_set_voltage_sel()
128 	pm_runtime_mark_last_busy(priv->dev);  in stm32_vrefbuf_set_voltage_sel()
129 	pm_runtime_put_autosuspend(priv->dev);  in stm32_vrefbuf_set_voltage_sel()
140 	ret = pm_runtime_resume_and_get(priv->dev);  in stm32_vrefbuf_get_voltage_sel()
144 	val = readl_relaxed(priv->base + STM32_VREFBUF_CSR);  in stm32_vrefbuf_get_voltage_sel()
147 	pm_runtime_mark_last_busy(priv->dev);  in stm32_vrefbuf_get_voltage_sel()
148 	pm_runtime_put_autosuspend(priv->dev);  in stm32_vrefbuf_get_voltage_sel()
180 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);  in stm32_vrefbuf_probe()
182 		return -ENOMEM;  in stm32_vrefbuf_probe()
183 	priv->dev = &pdev->dev;  in stm32_vrefbuf_probe()
185 	priv->base = devm_platform_ioremap_resource(pdev, 0);  in stm32_vrefbuf_probe()
186 	if (IS_ERR(priv->base))  in stm32_vrefbuf_probe()
187 		return PTR_ERR(priv->base);  in stm32_vrefbuf_probe()
189 	priv->clk = devm_clk_get(&pdev->dev, NULL);  in stm32_vrefbuf_probe()
190 	if (IS_ERR(priv->clk))  in stm32_vrefbuf_probe()
191 		return PTR_ERR(priv->clk);  in stm32_vrefbuf_probe()
193 	pm_runtime_get_noresume(&pdev->dev);  in stm32_vrefbuf_probe()
194 	pm_runtime_set_active(&pdev->dev);  in stm32_vrefbuf_probe()
195 	pm_runtime_set_autosuspend_delay(&pdev->dev,  in stm32_vrefbuf_probe()
197 	pm_runtime_use_autosuspend(&pdev->dev);  in stm32_vrefbuf_probe()
198 	pm_runtime_enable(&pdev->dev);  in stm32_vrefbuf_probe()
200 	ret = clk_prepare_enable(priv->clk);  in stm32_vrefbuf_probe()
202 		dev_err(&pdev->dev, "clk prepare failed with error %d\n", ret);  in stm32_vrefbuf_probe()
206 	config.dev = &pdev->dev;  in stm32_vrefbuf_probe()
208 	config.of_node = pdev->dev.of_node;  in stm32_vrefbuf_probe()
209 	config.init_data = of_get_regulator_init_data(&pdev->dev,  in stm32_vrefbuf_probe()
210 						      pdev->dev.of_node,  in stm32_vrefbuf_probe()
216 		dev_err(&pdev->dev, "register failed with error %d\n", ret);  in stm32_vrefbuf_probe()
221 	pm_runtime_mark_last_busy(&pdev->dev);  in stm32_vrefbuf_probe()
222 	pm_runtime_put_autosuspend(&pdev->dev);  in stm32_vrefbuf_probe()
227 	clk_disable_unprepare(priv->clk);  in stm32_vrefbuf_probe()
229 	pm_runtime_disable(&pdev->dev);  in stm32_vrefbuf_probe()
230 	pm_runtime_set_suspended(&pdev->dev);  in stm32_vrefbuf_probe()
231 	pm_runtime_put_noidle(&pdev->dev);  in stm32_vrefbuf_probe()
241 	pm_runtime_get_sync(&pdev->dev);  in stm32_vrefbuf_remove()
243 	clk_disable_unprepare(priv->clk);  in stm32_vrefbuf_remove()
244 	pm_runtime_disable(&pdev->dev);  in stm32_vrefbuf_remove()
245 	pm_runtime_set_suspended(&pdev->dev);  in stm32_vrefbuf_remove()
246 	pm_runtime_put_noidle(&pdev->dev);  in stm32_vrefbuf_remove()
256 	clk_disable_unprepare(priv->clk);  in stm32_vrefbuf_runtime_suspend()
266 	return clk_prepare_enable(priv->clk);  in stm32_vrefbuf_runtime_resume()
278 	{ .compatible = "st,stm32-vrefbuf", },
287 		.name  = "stm32-vrefbuf",
296 MODULE_DESCRIPTION("STMicroelectronics STM32 VREFBUF driver");
297 MODULE_ALIAS("platform:stm32-vrefbuf");