4  * TWL4030 MADC module driver-This driver monitors the real time
11  * Based on twl4030-madc.c
56 #define TWL4030_MADC_MADCON	(1 << 0)	/* MADC power on */
57 #define TWL4030_MADC_BUSY	(1 << 0)	/* MADC busy */
58 /* MADC conversion completion */
60 /* MADC SWx start conversion */
118  * struct twl4030_madc_request - madc request packet for channel conversion
153  * struct twl4030_madc_data - a container for madc info
154  * @dev:		Pointer to device structure for madc
156  * @usb3v1:		Pointer to bias regulator for madc
159  * @imr:		Interrupt mask register of MADC
160  * @isr:		Interrupt status register of MADC
178 	struct twl4030_madc_data *madc = iio_priv(iio_dev);  in twl4030_madc_read()  local
182 	req.method = madc->use_second_irq ? TWL4030_MADC_SW2 : TWL4030_MADC_SW1;  in twl4030_madc_read()
274  * of different conversion methods supported by MADC.
303  * @madc:	pointer to struct twl4030_madc_data
308 static int twl4030_madc_channel_raw_read(struct twl4030_madc_data *madc, u8 reg)  in twl4030_madc_channel_raw_read()  argument
318 		dev_err(madc->dev, "unable to read register 0x%X\n", reg);  in twl4030_madc_channel_raw_read()
371  * @madc - pointer to twl4030_madc_data struct
379 static int twl4030_madc_read_channels(struct twl4030_madc_data *madc,  in twl4030_madc_read_channels()  argument
390 		buf[i] = twl4030_madc_channel_raw_read(madc, reg);  in twl4030_madc_read_channels()
392 			dev_err(madc->dev, "Unable to read register 0x%X\n",  in twl4030_madc_read_channels()
404 				dev_err(madc->dev, "err reading current\n");  in twl4030_madc_read_channels()
414 				dev_err(madc->dev, "err reading temperature\n");  in twl4030_madc_read_channels()
442  * @madc - pointer to twl4030_madc_data struct
448 static int twl4030_madc_disable_irq(struct twl4030_madc_data *madc, u8 id)  in twl4030_madc_disable_irq()  argument
453 	ret = twl_i2c_read_u8(TWL4030_MODULE_MADC, &val, madc->imr);  in twl4030_madc_disable_irq()
455 		dev_err(madc->dev, "unable to read imr register 0x%X\n",  in twl4030_madc_disable_irq()
456 			madc->imr);  in twl4030_madc_disable_irq()
460 	ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, val, madc->imr);  in twl4030_madc_disable_irq()
462 		dev_err(madc->dev,  in twl4030_madc_disable_irq()
463 			"unable to write imr register 0x%X\n", madc->imr);  in twl4030_madc_disable_irq()
472 	struct twl4030_madc_data *madc = _madc;  in twl4030_madc_threaded_irq_handler()  local
478 	mutex_lock(&madc->lock);  in twl4030_madc_threaded_irq_handler()
479 	ret = twl_i2c_read_u8(TWL4030_MODULE_MADC, &isr_val, madc->isr);  in twl4030_madc_threaded_irq_handler()
481 		dev_err(madc->dev, "unable to read isr register 0x%X\n",  in twl4030_madc_threaded_irq_handler()
482 			madc->isr);  in twl4030_madc_threaded_irq_handler()
485 	ret = twl_i2c_read_u8(TWL4030_MODULE_MADC, &imr_val, madc->imr);  in twl4030_madc_threaded_irq_handler()
487 		dev_err(madc->dev, "unable to read imr register 0x%X\n",  in twl4030_madc_threaded_irq_handler()
488 			madc->imr);  in twl4030_madc_threaded_irq_handler()
495 		ret = twl4030_madc_disable_irq(madc, i);  in twl4030_madc_threaded_irq_handler()
497 			dev_dbg(madc->dev, "Disable interrupt failed %d\n", i);  in twl4030_madc_threaded_irq_handler()
498 		madc->requests[i].result_pending = true;  in twl4030_madc_threaded_irq_handler()
501 		r = &madc->requests[i];  in twl4030_madc_threaded_irq_handler()
507 		twl4030_madc_read_channels(madc, method->rbase,  in twl4030_madc_threaded_irq_handler()
513 	mutex_unlock(&madc->lock);  in twl4030_madc_threaded_irq_handler()
523 		r = &madc->requests[i];  in twl4030_madc_threaded_irq_handler()
528 		twl4030_madc_read_channels(madc, method->rbase,  in twl4030_madc_threaded_irq_handler()
534 	mutex_unlock(&madc->lock);  in twl4030_madc_threaded_irq_handler()
540  * Function which enables the madc conversion
542  * @madc - pointer to twl4030_madc_data struct
547 static int twl4030_madc_start_conversion(struct twl4030_madc_data *madc,  in twl4030_madc_start_conversion()  argument
560 		dev_err(madc->dev, "unable to write ctrl register 0x%X\n",  in twl4030_madc_start_conversion()
570  * @madc - pointer to twl4030_madc_data struct
575 static int twl4030_madc_wait_conversion_ready(struct twl4030_madc_data *madc,  in twl4030_madc_wait_conversion_ready()  argument
588 			dev_err(madc->dev,  in twl4030_madc_wait_conversion_ready()
597 	dev_err(madc->dev, "conversion timeout!\n");  in twl4030_madc_wait_conversion_ready()
675  * @madc:	pointer to twl4030_madc_data struct
684 static int twl4030_madc_set_current_generator(struct twl4030_madc_data *madc,  in twl4030_madc_set_current_generator()  argument
694 		dev_err(madc->dev, "unable to read BCICTL1 reg 0x%X",  in twl4030_madc_set_current_generator()
708 		dev_err(madc->dev, "unable to write BCICTL1 reg 0x%X\n",  in twl4030_madc_set_current_generator()
717  * Function that sets MADC software power on bit to enable MADC
718  * @madc - pointer to twl4030_madc_data struct
719  * @on - Enable or disable MADC software power on bit.
722 static int twl4030_madc_set_power(struct twl4030_madc_data *madc, int on)  in twl4030_madc_set_power()  argument
730 		dev_err(madc->dev, "unable to read madc ctrl1 reg 0x%X\n",  in twl4030_madc_set_power()
740 		dev_err(madc->dev, "unable to write madc ctrl1 reg 0x%X\n",  in twl4030_madc_set_power()
749  * Initialize MADC and request for threaded irq
753 	struct twl4030_madc_data *madc;  in twl4030_madc_probe()  local
765 	iio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*madc));  in twl4030_madc_probe()
771 	madc = iio_priv(iio_dev);  in twl4030_madc_probe()
772 	madc->dev = &pdev->dev;  in twl4030_madc_probe()
786 		madc->use_second_irq = (pdata->irq_line != 1);  in twl4030_madc_probe()
788 		madc->use_second_irq = of_property_read_bool(np,  in twl4030_madc_probe()
789 				       "ti,system-uses-second-madc-irq");  in twl4030_madc_probe()
791 	madc->imr = madc->use_second_irq ? TWL4030_MADC_IMR2 :  in twl4030_madc_probe()
793 	madc->isr = madc->use_second_irq ? TWL4030_MADC_ISR2 :  in twl4030_madc_probe()
796 	ret = twl4030_madc_set_power(madc, 1);  in twl4030_madc_probe()
799 	ret = twl4030_madc_set_current_generator(madc, 0, 1);  in twl4030_madc_probe()
819 	/* Check that MADC clock is on */  in twl4030_madc_probe()
827 	/* If MADC clk is not on, turn it on */  in twl4030_madc_probe()
841 	mutex_init(&madc->lock);  in twl4030_madc_probe()
847 				   "twl4030_madc", madc);  in twl4030_madc_probe()
852 	twl4030_madc = madc;  in twl4030_madc_probe()
854 	/* Configure MADC[3:6] */  in twl4030_madc_probe()
871 	/* Enable 3v1 bias regulator for MADC[3:6] */  in twl4030_madc_probe()
872 	madc->usb3v1 = devm_regulator_get(madc->dev, "vusb3v1");  in twl4030_madc_probe()
873 	if (IS_ERR(madc->usb3v1)) {  in twl4030_madc_probe()
878 	ret = regulator_enable(madc->usb3v1);  in twl4030_madc_probe()
880 		dev_err(madc->dev, "could not enable 3v1 bias regulator\n");  in twl4030_madc_probe()
893 	regulator_disable(madc->usb3v1);  in twl4030_madc_probe()
895 	twl4030_madc_set_current_generator(madc, 0, 0);  in twl4030_madc_probe()
897 	twl4030_madc_set_power(madc, 0);  in twl4030_madc_probe()
904 	struct twl4030_madc_data *madc = iio_priv(iio_dev);  in twl4030_madc_remove()  local
908 	twl4030_madc_set_current_generator(madc, 0, 0);  in twl4030_madc_remove()
909 	twl4030_madc_set_power(madc, 0);  in twl4030_madc_remove()
911 	regulator_disable(madc->usb3v1);  in twl4030_madc_remove()
918 	{ .compatible = "ti,twl4030-madc", },