3  *  Sophgo CV1800B SARADC Driver
72 static void cv1800b_adc_start_measurement(struct cv1800b_adc *saradc,  in cv1800b_adc_start_measurement()  argument
75 	writel(0, saradc->regs + CV1800B_ADC_CTRL_REG);  in cv1800b_adc_start_measurement()
77 	       saradc->regs + CV1800B_ADC_CTRL_REG);  in cv1800b_adc_start_measurement()
80 static int cv1800b_adc_wait(struct cv1800b_adc *saradc)  in cv1800b_adc_wait()  argument
82 	if (saradc->irq < 0) {  in cv1800b_adc_wait()
85 		return readl_poll_timeout(saradc->regs + CV1800B_ADC_STATUS_REG,  in cv1800b_adc_wait()
90 	return wait_for_completion_timeout(&saradc->completion,  in cv1800b_adc_wait()
99 	struct cv1800b_adc *saradc = iio_priv(indio_dev);  in cv1800b_adc_read_raw()  local
105 		scoped_guard(mutex, &saradc->lock) {  in cv1800b_adc_read_raw()
108 			cv1800b_adc_start_measurement(saradc, chan->scan_index);  in cv1800b_adc_read_raw()
109 			ret = cv1800b_adc_wait(saradc);  in cv1800b_adc_read_raw()
113 			sample = readl(saradc->regs + CV1800B_ADC_CH_RESULT_REG(chan->scan_index));  in cv1800b_adc_read_raw()
126 		u32 status_reg = readl(saradc->regs + CV1800B_ADC_CYC_SET_REG);  in cv1800b_adc_read_raw()
128 		unsigned int freq = clk_get_rate(saradc->clk) / clk_div;  in cv1800b_adc_read_raw()
143 	struct cv1800b_adc *saradc = private;  in cv1800b_adc_interrupt_handler()  local
144 	u32 reg = readl(saradc->regs + CV1800B_ADC_INTR_STA_REG);  in cv1800b_adc_interrupt_handler()
149 	writel(CV1800B_ADC_INTR_CLR_BIT, saradc->regs + CV1800B_ADC_INTR_CLR_REG);  in cv1800b_adc_interrupt_handler()
150 	complete(&saradc->completion);  in cv1800b_adc_interrupt_handler()
162 	struct cv1800b_adc *saradc;  in cv1800b_adc_probe()  local
166 	indio_dev = devm_iio_device_alloc(dev, sizeof(*saradc));  in cv1800b_adc_probe()
170 	saradc = iio_priv(indio_dev);  in cv1800b_adc_probe()
177 	saradc->clk = devm_clk_get_enabled(dev, NULL);  in cv1800b_adc_probe()
178 	if (IS_ERR(saradc->clk))  in cv1800b_adc_probe()
179 		return PTR_ERR(saradc->clk);  in cv1800b_adc_probe()
181 	saradc->regs = devm_platform_ioremap_resource(pdev, 0);  in cv1800b_adc_probe()
182 	if (IS_ERR(saradc->regs))  in cv1800b_adc_probe()
183 		return PTR_ERR(saradc->regs);  in cv1800b_adc_probe()
185 	saradc->irq = platform_get_irq_optional(pdev, 0);  in cv1800b_adc_probe()
186 	if (saradc->irq > 0) {  in cv1800b_adc_probe()
187 		init_completion(&saradc->completion);  in cv1800b_adc_probe()
188 		ret = devm_request_irq(dev, saradc->irq,  in cv1800b_adc_probe()
190 				       dev_name(dev), saradc);  in cv1800b_adc_probe()
194 		writel(1, saradc->regs + CV1800B_ADC_INTR_EN_REG);  in cv1800b_adc_probe()
197 	ret = devm_mutex_init(dev, &saradc->lock);  in cv1800b_adc_probe()
205 	       saradc->regs + CV1800B_ADC_CYC_SET_REG);  in cv1800b_adc_probe()
211 	{ .compatible = "sophgo,cv1800b-saradc", },
218 		.name		= "sophgo-cv1800b-saradc",
226 MODULE_DESCRIPTION("Sophgo CV1800B SARADC driver");