3  * IIO DAC driver for NXP LPC18xx DAC
25 /* LPC18XX DAC registers and bits */
53 	struct lpc18xx_dac *dac = iio_priv(indio_dev);  in lpc18xx_dac_read_raw()  local
58 		reg = readl(dac->base + LPC18XX_DAC_CR);  in lpc18xx_dac_read_raw()
65 		*val = regulator_get_voltage(dac->vref) / 1000;  in lpc18xx_dac_read_raw()
78 	struct lpc18xx_dac *dac = iio_priv(indio_dev);  in lpc18xx_dac_write_raw()  local
89 		mutex_lock(&dac->lock);  in lpc18xx_dac_write_raw()
90 		writel(reg, dac->base + LPC18XX_DAC_CR);  in lpc18xx_dac_write_raw()
91 		writel(LPC18XX_DAC_CTRL_DMA_ENA, dac->base + LPC18XX_DAC_CTRL);  in lpc18xx_dac_write_raw()
92 		mutex_unlock(&dac->lock);  in lpc18xx_dac_write_raw()
108 	struct lpc18xx_dac *dac;  in lpc18xx_dac_probe()  local
111 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*dac));  in lpc18xx_dac_probe()
116 	dac = iio_priv(indio_dev);  in lpc18xx_dac_probe()
117 	mutex_init(&dac->lock);  in lpc18xx_dac_probe()
119 	dac->base = devm_platform_ioremap_resource(pdev, 0);  in lpc18xx_dac_probe()
120 	if (IS_ERR(dac->base))  in lpc18xx_dac_probe()
121 		return PTR_ERR(dac->base);  in lpc18xx_dac_probe()
123 	dac->clk = devm_clk_get(&pdev->dev, NULL);  in lpc18xx_dac_probe()
124 	if (IS_ERR(dac->clk)) {  in lpc18xx_dac_probe()
126 		return PTR_ERR(dac->clk);  in lpc18xx_dac_probe()
129 	dac->vref = devm_regulator_get(&pdev->dev, "vref");  in lpc18xx_dac_probe()
130 	if (IS_ERR(dac->vref)) {  in lpc18xx_dac_probe()
132 		return PTR_ERR(dac->vref);  in lpc18xx_dac_probe()
141 	ret = regulator_enable(dac->vref);  in lpc18xx_dac_probe()
147 	ret = clk_prepare_enable(dac->clk);  in lpc18xx_dac_probe()
153 	writel(0, dac->base + LPC18XX_DAC_CTRL);  in lpc18xx_dac_probe()
154 	writel(0, dac->base + LPC18XX_DAC_CR);  in lpc18xx_dac_probe()
165 	clk_disable_unprepare(dac->clk);  in lpc18xx_dac_probe()
167 	regulator_disable(dac->vref);  in lpc18xx_dac_probe()
174 	struct lpc18xx_dac *dac = iio_priv(indio_dev);  in lpc18xx_dac_remove()  local
178 	writel(0, dac->base + LPC18XX_DAC_CTRL);  in lpc18xx_dac_remove()
179 	clk_disable_unprepare(dac->clk);  in lpc18xx_dac_remove()
180 	regulator_disable(dac->vref);  in lpc18xx_dac_remove()
186 	{ .compatible = "nxp,lpc1850-dac" },
195 		.name = "lpc18xx-dac",
201 MODULE_DESCRIPTION("LPC18xx DAC driver");