69 static int lpc18xx_adc_read_chan(struct lpc18xx_adc *adc, unsigned int ch)  in lpc18xx_adc_read_chan()  argument
74 	reg = adc->cr_reg | BIT(ch) | LPC18XX_ADC_CR_START_NOW;  in lpc18xx_adc_read_chan()
75 	writel(reg, adc->base + LPC18XX_ADC_CR);  in lpc18xx_adc_read_chan()
77 	ret = readl_poll_timeout(adc->base + LPC18XX_ADC_GDR, reg,  in lpc18xx_adc_read_chan()
80 		dev_warn(adc->dev, "adc read timed out\n");  in lpc18xx_adc_read_chan()
91 	struct lpc18xx_adc *adc = iio_priv(indio_dev);  in lpc18xx_adc_read_raw()  local
95 		mutex_lock(&adc->lock);  in lpc18xx_adc_read_raw()
96 		*val = lpc18xx_adc_read_chan(adc, chan->channel);  in lpc18xx_adc_read_raw()
97 		mutex_unlock(&adc->lock);  in lpc18xx_adc_read_raw()
104 		*val = regulator_get_voltage(adc->vref) / 1000;  in lpc18xx_adc_read_raw()
119 	struct lpc18xx_adc *adc = data;  in lpc18xx_clear_cr_reg()  local
121 	writel(0, adc->base + LPC18XX_ADC_CR);  in lpc18xx_clear_cr_reg()
132 	struct lpc18xx_adc *adc;  in lpc18xx_adc_probe()  local
137 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc));  in lpc18xx_adc_probe()
141 	adc = iio_priv(indio_dev);  in lpc18xx_adc_probe()
142 	adc->dev = &pdev->dev;  in lpc18xx_adc_probe()
143 	mutex_init(&adc->lock);  in lpc18xx_adc_probe()
145 	adc->base = devm_platform_ioremap_resource(pdev, 0);  in lpc18xx_adc_probe()
146 	if (IS_ERR(adc->base))  in lpc18xx_adc_probe()
147 		return PTR_ERR(adc->base);  in lpc18xx_adc_probe()
149 	adc->clk = devm_clk_get_enabled(&pdev->dev, NULL);  in lpc18xx_adc_probe()
150 	if (IS_ERR(adc->clk))  in lpc18xx_adc_probe()
151 		return dev_err_probe(&pdev->dev, PTR_ERR(adc->clk),  in lpc18xx_adc_probe()
154 	adc->vref = devm_regulator_get(&pdev->dev, "vref");  in lpc18xx_adc_probe()
155 	if (IS_ERR(adc->vref))  in lpc18xx_adc_probe()
156 		return dev_err_probe(&pdev->dev, PTR_ERR(adc->vref),  in lpc18xx_adc_probe()
165 	ret = regulator_enable(adc->vref);  in lpc18xx_adc_probe()
171 	ret = devm_add_action_or_reset(&pdev->dev, lpc18xx_regulator_disable, adc->vref);  in lpc18xx_adc_probe()
175 	rate = clk_get_rate(adc->clk);  in lpc18xx_adc_probe()
178 	adc->cr_reg = (clkdiv << LPC18XX_ADC_CR_CLKDIV_SHIFT) |  in lpc18xx_adc_probe()
180 	writel(adc->cr_reg, adc->base + LPC18XX_ADC_CR);  in lpc18xx_adc_probe()
182 	ret = devm_add_action_or_reset(&pdev->dev, lpc18xx_clear_cr_reg, adc);  in lpc18xx_adc_probe()