1 // SPDX-License-Identifier: GPL-2.0-only
3  * MediaTek MT6359 PMIC AUXADC IIO driver
24 #include <dt-bindings/iio/adc/mediatek,mt6357-auxadc.h>
25 #include <dt-bindings/iio/adc/mediatek,mt6358-auxadc.h>
26 #include <dt-bindings/iio/adc/mediatek,mt6359-auxadc.h>
35 /* For PMIC_RG_RESET_VAL and MT6358_IMP0_CLEAR, the bits specific purpose is unknown. */
85  * struct mt6359_auxadc - Main driver structure
87  * @regmap:        Regmap from SoC PMIC Wrapper
88  * @chip_info:     PMIC specific chip info
101  * struct mtk_pmic_auxadc_chan - PMIC AUXADC channel data
115  * struct mtk_pmic_auxadc_info - PMIC specific chip info
116  * @model_name:     PMIC model name
119  * @desc:           PMIC AUXADC channel data
120  * @regs:           List of PMIC specific registers
307 	const struct mtk_pmic_auxadc_info *cinfo = adc_dev->chip_info;  in mt6358_stop_imp_conv()
308 	struct regmap *regmap = adc_dev->regmap;  in mt6358_stop_imp_conv()
310 	regmap_set_bits(regmap, cinfo->regs[PMIC_AUXADC_IMP0], MT6358_IMP0_CLEAR);  in mt6358_stop_imp_conv()
311 	regmap_clear_bits(regmap, cinfo->regs[PMIC_AUXADC_IMP0], MT6358_IMP0_CLEAR);  in mt6358_stop_imp_conv()
312 	regmap_clear_bits(regmap, cinfo->regs[PMIC_AUXADC_IMP1], MT6358_IMP1_AUTOREPEAT_EN);  in mt6358_stop_imp_conv()
313 	regmap_clear_bits(regmap, cinfo->regs[PMIC_AUXADC_DCM_CON], MT6358_DCM_CK_SW_EN);  in mt6358_stop_imp_conv()
318 	const struct mtk_pmic_auxadc_info *cinfo = adc_dev->chip_info;  in mt6358_start_imp_conv()
319 	struct regmap *regmap = adc_dev->regmap;  in mt6358_start_imp_conv()
323 	regmap_set_bits(regmap, cinfo->regs[PMIC_AUXADC_DCM_CON], MT6358_DCM_CK_SW_EN);  in mt6358_start_imp_conv()
324 	regmap_set_bits(regmap, cinfo->regs[PMIC_AUXADC_IMP1], MT6358_IMP1_AUTOREPEAT_EN);  in mt6358_start_imp_conv()
326 	ret = regmap_read_poll_timeout(adc_dev->regmap, cinfo->regs[PMIC_AUXADC_IMP0],  in mt6358_start_imp_conv()
339 	const struct mtk_pmic_auxadc_info *cinfo = adc_dev->chip_info;  in mt6358_read_imp()
340 	struct regmap *regmap = adc_dev->regmap;  in mt6358_read_imp()
341 	u16 reg_adc0 = cinfo->regs[PMIC_AUXADC_ADC0];  in mt6358_read_imp()
350 	regmap_read(regmap, reg_adc0 + (cinfo->imp_adc_num << 1), &val_v);  in mt6358_read_imp()
364 	const struct mtk_pmic_auxadc_info *cinfo = adc_dev->chip_info;  in mt6359_read_imp()
365 	struct regmap *regmap = adc_dev->regmap;  in mt6359_read_imp()
370 	regmap_write(regmap, cinfo->regs[PMIC_AUXADC_IMP0], MT6359_IMP0_CONV_EN);  in mt6359_read_imp()
371 	ret = regmap_read_poll_timeout(regmap, cinfo->regs[PMIC_AUXADC_IMP1],  in mt6359_read_imp()
376 	regmap_write(regmap, cinfo->regs[PMIC_AUXADC_IMP0], 0);  in mt6359_read_imp()
383 	ret = regmap_read(regmap, cinfo->regs[PMIC_AUXADC_IMP3], &val_v);  in mt6359_read_imp()
387 	ret = regmap_read(regmap, cinfo->regs[PMIC_FGADC_R_CON0], &val_i);  in mt6359_read_imp()
431 	const struct mtk_pmic_auxadc_info *cinfo = adc_dev->chip_info;  in mt6359_auxadc_reset()
432 	struct regmap *regmap = adc_dev->regmap;  in mt6359_auxadc_reset()
435 	if (cinfo->sec_unlock_key)  in mt6359_auxadc_reset()
436 		regmap_write(regmap, cinfo->regs[PMIC_HK_TOP_WKEY], cinfo->sec_unlock_key);  in mt6359_auxadc_reset()
439 	regmap_set_bits(regmap, cinfo->regs[PMIC_HK_TOP_RST_CON0], PMIC_RG_RESET_VAL);  in mt6359_auxadc_reset()
441 	/* De-assert ADC reset. No wait required, as pwrap takes care of that for us. */  in mt6359_auxadc_reset()
442 	regmap_clear_bits(regmap, cinfo->regs[PMIC_HK_TOP_RST_CON0], PMIC_RG_RESET_VAL);  in mt6359_auxadc_reset()
445 	if (cinfo->sec_unlock_key)  in mt6359_auxadc_reset()
446 		regmap_write(regmap, cinfo->regs[PMIC_HK_TOP_WKEY], 0);  in mt6359_auxadc_reset()
452 	const struct mtk_pmic_auxadc_info *cinfo = adc_dev->chip_info;  in mt6359_auxadc_read_adc()
453 	const struct mtk_pmic_auxadc_chan *desc = &cinfo->desc[chan->scan_index];  in mt6359_auxadc_read_adc()
454 	struct regmap *regmap = adc_dev->regmap;  in mt6359_auxadc_read_adc()
459 	ret = regmap_write(regmap, cinfo->regs[desc->req_idx], desc->req_mask);  in mt6359_auxadc_read_adc()
464 	fsleep(desc->num_samples * AUXADC_AVG_TIME_US);  in mt6359_auxadc_read_adc()
467 				       cinfo->regs[PMIC_AUXADC_ADC0] + (chan->address << 1),  in mt6359_auxadc_read_adc()
474 	regmap_write(regmap, cinfo->regs[desc->req_idx], 0);  in mt6359_auxadc_read_adc()
476 	*out = val & GENMASK(chan->scan_type.realbits - 1, 0);  in mt6359_auxadc_read_adc()
483 	return sysfs_emit(label, "%s\n", chan->datasheet_name);  in mt6359_auxadc_read_label()
491 	const struct mtk_pmic_auxadc_info *cinfo = adc_dev->chip_info;  in mt6359_auxadc_read_raw()
492 	const struct mtk_pmic_auxadc_chan *desc = &cinfo->desc[chan->scan_index];  in mt6359_auxadc_read_raw()
496 		*val = desc->r_ratio.numerator * AUXADC_VOLT_FULL;  in mt6359_auxadc_read_raw()
498 		if (desc->r_ratio.denominator > 1) {  in mt6359_auxadc_read_raw()
499 			*val2 = desc->r_ratio.denominator;  in mt6359_auxadc_read_raw()
506 	scoped_guard(mutex, &adc_dev->lock) {  in mt6359_auxadc_read_raw()
507 		switch (chan->scan_index) {  in mt6359_auxadc_read_raw()
509 			ret = adc_dev->chip_info->read_imp(adc_dev, NULL, val);  in mt6359_auxadc_read_raw()
512 			ret = adc_dev->chip_info->read_imp(adc_dev, val, NULL);  in mt6359_auxadc_read_raw()
525 		if (ret == -ETIMEDOUT) {  in mt6359_auxadc_read_raw()
526 			if (adc_dev->timed_out) {  in mt6359_auxadc_read_raw()
527 				dev_warn(adc_dev->dev, "Resetting stuck ADC!\r\n");  in mt6359_auxadc_read_raw()
530 			adc_dev->timed_out = true;  in mt6359_auxadc_read_raw()
534 	adc_dev->timed_out = false;  in mt6359_auxadc_read_raw()
546 	struct device *dev = &pdev->dev;  in mt6359_auxadc_probe()
547 	struct device *mt6397_mfd_dev = dev->parent;  in mt6359_auxadc_probe()
553 	/* Regmap is from SoC PMIC Wrapper, parent of the mt6397 MFD */  in mt6359_auxadc_probe()
554 	regmap = dev_get_regmap(mt6397_mfd_dev->parent, NULL);  in mt6359_auxadc_probe()
556 		return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n");  in mt6359_auxadc_probe()
560 		return -ENOMEM;  in mt6359_auxadc_probe()
563 	adc_dev->regmap = regmap;  in mt6359_auxadc_probe()
564 	adc_dev->dev = dev;  in mt6359_auxadc_probe()
566 	adc_dev->chip_info = device_get_match_data(dev);  in mt6359_auxadc_probe()
567 	if (!adc_dev->chip_info)  in mt6359_auxadc_probe()
568 		return -EINVAL;  in mt6359_auxadc_probe()
570 	mutex_init(&adc_dev->lock);  in mt6359_auxadc_probe()
574 	indio_dev->name = adc_dev->chip_info->model_name;  in mt6359_auxadc_probe()
575 	indio_dev->info = &mt6359_auxadc_iio_info;  in mt6359_auxadc_probe()
576 	indio_dev->modes = INDIO_DIRECT_MODE;  in mt6359_auxadc_probe()
577 	indio_dev->channels = adc_dev->chip_info->channels;  in mt6359_auxadc_probe()
578 	indio_dev->num_channels = adc_dev->chip_info->num_channels;  in mt6359_auxadc_probe()
588 	{ .compatible = "mediatek,mt6357-auxadc", .data = &mt6357_chip_info },
589 	{ .compatible = "mediatek,mt6358-auxadc", .data = &mt6358_chip_info },
590 	{ .compatible = "mediatek,mt6359-auxadc", .data = &mt6359_chip_info },
597 		.name = "mt6359-auxadc",
606 MODULE_DESCRIPTION("MediaTek MT6359 PMIC AUXADC Driver");