1 // SPDX-License-Identifier: GPL-2.0-only
8 #include <linux/delay.h>
118 	reg_channel = adc_dev->reg_base + MT6577_AUXADC_DAT0 +  in mt6577_auxadc_read()
119 		      chan->channel * 0x04;  in mt6577_auxadc_read()
121 	mutex_lock(&adc_dev->lock);  in mt6577_auxadc_read()
123 	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_CON1,  in mt6577_auxadc_read()
124 			      0, 1 << chan->channel);  in mt6577_auxadc_read()
132 		dev_err(indio_dev->dev.parent,  in mt6577_auxadc_read()
133 			"wait for channel[%d] ready bit clear time out\n",  in mt6577_auxadc_read()
134 			chan->channel);  in mt6577_auxadc_read()
139 	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_CON1,  in mt6577_auxadc_read()
140 			      1 << chan->channel, 0);  in mt6577_auxadc_read()
142 	/* we must delay here for hardware sample channel data */  in mt6577_auxadc_read()
145 	if (adc_dev->dev_comp->check_global_idle) {  in mt6577_auxadc_read()
146 		/* check MTK_AUXADC_CON2 if auxadc is idle */  in mt6577_auxadc_read()
147 		ret = readl_poll_timeout(adc_dev->reg_base + MT6577_AUXADC_CON2,  in mt6577_auxadc_read()
152 			dev_err(indio_dev->dev.parent,  in mt6577_auxadc_read()
153 				"wait for auxadc idle time out\n");  in mt6577_auxadc_read()
164 		dev_err(indio_dev->dev.parent,  in mt6577_auxadc_read()
165 			"wait for channel[%d] data ready time out\n",  in mt6577_auxadc_read()
166 			chan->channel);  in mt6577_auxadc_read()
173 	mutex_unlock(&adc_dev->lock);  in mt6577_auxadc_read()
179 	mutex_unlock(&adc_dev->lock);  in mt6577_auxadc_read()
181 	return -ETIMEDOUT;  in mt6577_auxadc_read()
196 			dev_err(indio_dev->dev.parent,  in mt6577_auxadc_read_raw()
198 				chan->channel);  in mt6577_auxadc_read_raw()
201 		if (adc_dev->dev_comp->sample_data_cali)  in mt6577_auxadc_read_raw()
204 		/* Convert adc raw data to voltage: 0 - 1500 mV */  in mt6577_auxadc_read_raw()
210 		return -EINVAL;  in mt6577_auxadc_read_raw()
224 	ret = clk_prepare_enable(adc_dev->adc_clk);  in mt6577_auxadc_resume()
230 	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,  in mt6577_auxadc_resume()
242 	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,  in mt6577_auxadc_suspend()
244 	clk_disable_unprepare(adc_dev->adc_clk);  in mt6577_auxadc_suspend()
253 	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,  in mt6577_power_off()
264 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*adc_dev));  in mt6577_auxadc_probe()
266 		return -ENOMEM;  in mt6577_auxadc_probe()
269 	indio_dev->name = dev_name(&pdev->dev);  in mt6577_auxadc_probe()
270 	indio_dev->info = &mt6577_auxadc_info;  in mt6577_auxadc_probe()
271 	indio_dev->modes = INDIO_DIRECT_MODE;  in mt6577_auxadc_probe()
272 	indio_dev->channels = mt6577_auxadc_iio_channels;  in mt6577_auxadc_probe()
273 	indio_dev->num_channels = ARRAY_SIZE(mt6577_auxadc_iio_channels);  in mt6577_auxadc_probe()
275 	adc_dev->reg_base = devm_platform_ioremap_resource(pdev, 0);  in mt6577_auxadc_probe()
276 	if (IS_ERR(adc_dev->reg_base))  in mt6577_auxadc_probe()
277 		return dev_err_probe(&pdev->dev, PTR_ERR(adc_dev->reg_base),  in mt6577_auxadc_probe()
280 	adc_dev->adc_clk = devm_clk_get_enabled(&pdev->dev, "main");  in mt6577_auxadc_probe()
281 	if (IS_ERR(adc_dev->adc_clk))  in mt6577_auxadc_probe()
282 		return dev_err_probe(&pdev->dev, PTR_ERR(adc_dev->adc_clk),  in mt6577_auxadc_probe()
285 	adc_clk_rate = clk_get_rate(adc_dev->adc_clk);  in mt6577_auxadc_probe()
287 		return dev_err_probe(&pdev->dev, -EINVAL, "null clock rate\n");  in mt6577_auxadc_probe()
289 	adc_dev->dev_comp = device_get_match_data(&pdev->dev);  in mt6577_auxadc_probe()
291 	mutex_init(&adc_dev->lock);  in mt6577_auxadc_probe()
293 	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,  in mt6577_auxadc_probe()
298 	ret = devm_add_action_or_reset(&pdev->dev, mt6577_power_off, adc_dev);  in mt6577_auxadc_probe()
300 		return dev_err_probe(&pdev->dev, ret,  in mt6577_auxadc_probe()
303 	ret = devm_iio_device_register(&pdev->dev, indio_dev);  in mt6577_auxadc_probe()
305 		return dev_err_probe(&pdev->dev, ret, "failed to register iio device\n");  in mt6577_auxadc_probe()
315 	{ .compatible = "mediatek,mt2701-auxadc", .data = &mt8173_compat },
316 	{ .compatible = "mediatek,mt2712-auxadc", .data = &mt8173_compat },
317 	{ .compatible = "mediatek,mt7622-auxadc", .data = &mt8173_compat },
318 	{ .compatible = "mediatek,mt8173-auxadc", .data = &mt8173_compat },
319 	{ .compatible = "mediatek,mt8186-auxadc", .data = &mt8186_compat },
320 	{ .compatible = "mediatek,mt6765-auxadc", .data = &mt6765_compat },
327 		.name   = "mt6577-auxadc",