Lines Matching +full:adc +full:- +full:reserved +full:- +full:channels
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2014-2015 Imagination Technologies Ltd.
47 * As per device specification, wait six clock cycles after power-up to
69 writel(val, adc_dev->reg_base + reg); in cc10001_adc_write_reg()
75 return readl(adc_dev->reg_base + reg); in cc10001_adc_read_reg()
81 ndelay(adc_dev->start_delay_ns); in cc10001_adc_power_up()
146 indio_dev = pf->indio_dev; in cc10001_adc_trigger_h()
148 data = adc_dev->buf; in cc10001_adc_trigger_h()
150 mutex_lock(&adc_dev->lock); in cc10001_adc_trigger_h()
152 if (!adc_dev->shared) in cc10001_adc_trigger_h()
156 delay_ns = adc_dev->eoc_delay_ns / CC10001_MAX_POLL_COUNT; in cc10001_adc_trigger_h()
160 for_each_set_bit(scan_idx, indio_dev->active_scan_mask, in cc10001_adc_trigger_h()
161 indio_dev->masklength) { in cc10001_adc_trigger_h()
163 channel = indio_dev->channels[scan_idx].channel; in cc10001_adc_trigger_h()
168 dev_warn(&indio_dev->dev, in cc10001_adc_trigger_h()
177 if (!adc_dev->shared) in cc10001_adc_trigger_h()
180 mutex_unlock(&adc_dev->lock); in cc10001_adc_trigger_h()
185 iio_trigger_notify_done(indio_dev->trig); in cc10001_adc_trigger_h()
197 if (!adc_dev->shared) in cc10001_adc_read_raw_voltage()
201 delay_ns = adc_dev->eoc_delay_ns / CC10001_MAX_POLL_COUNT; in cc10001_adc_read_raw_voltage()
203 cc10001_adc_start(adc_dev, chan->channel); in cc10001_adc_read_raw_voltage()
205 val = cc10001_adc_poll_done(indio_dev, chan->channel, delay_ns); in cc10001_adc_read_raw_voltage()
207 if (!adc_dev->shared) in cc10001_adc_read_raw_voltage()
223 return -EBUSY; in cc10001_adc_read_raw()
224 mutex_lock(&adc_dev->lock); in cc10001_adc_read_raw()
226 mutex_unlock(&adc_dev->lock); in cc10001_adc_read_raw()
229 return -EIO; in cc10001_adc_read_raw()
233 ret = regulator_get_voltage(adc_dev->reg); in cc10001_adc_read_raw()
238 *val2 = chan->scan_type.realbits; in cc10001_adc_read_raw()
242 return -EINVAL; in cc10001_adc_read_raw()
251 kfree(adc_dev->buf); in cc10001_update_scan_mode()
252 adc_dev->buf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); in cc10001_update_scan_mode()
253 if (!adc_dev->buf) in cc10001_update_scan_mode()
254 return -ENOMEM; in cc10001_update_scan_mode()
270 indio_dev->num_channels = bitmap_weight(&channel_map, in cc10001_adc_channel_init()
273 chan_array = devm_kcalloc(&indio_dev->dev, indio_dev->num_channels, in cc10001_adc_channel_init()
277 return -ENOMEM; in cc10001_adc_channel_init()
282 chan->type = IIO_VOLTAGE; in cc10001_adc_channel_init()
283 chan->indexed = 1; in cc10001_adc_channel_init()
284 chan->channel = bit; in cc10001_adc_channel_init()
285 chan->scan_index = idx; in cc10001_adc_channel_init()
286 chan->scan_type.sign = 'u'; in cc10001_adc_channel_init()
287 chan->scan_type.realbits = 10; in cc10001_adc_channel_init()
288 chan->scan_type.storagebits = 16; in cc10001_adc_channel_init()
289 chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); in cc10001_adc_channel_init()
290 chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW); in cc10001_adc_channel_init()
295 timestamp->type = IIO_TIMESTAMP; in cc10001_adc_channel_init()
296 timestamp->channel = -1; in cc10001_adc_channel_init()
297 timestamp->scan_index = idx; in cc10001_adc_channel_init()
298 timestamp->scan_type.sign = 's'; in cc10001_adc_channel_init()
299 timestamp->scan_type.realbits = 64; in cc10001_adc_channel_init()
300 timestamp->scan_type.storagebits = 64; in cc10001_adc_channel_init()
302 indio_dev->channels = chan_array; in cc10001_adc_channel_init()
319 struct device *dev = &pdev->dev; in cc10001_adc_probe()
320 struct device_node *node = dev->of_node; in cc10001_adc_probe()
329 return -ENOMEM; in cc10001_adc_probe()
333 channel_map = GENMASK(CC10001_ADC_NUM_CHANNELS - 1, 0); in cc10001_adc_probe()
334 if (!of_property_read_u32(node, "adc-reserved-channels", &ret)) { in cc10001_adc_probe()
335 adc_dev->shared = true; in cc10001_adc_probe()
339 adc_dev->reg = devm_regulator_get(dev, "vref"); in cc10001_adc_probe()
340 if (IS_ERR(adc_dev->reg)) in cc10001_adc_probe()
341 return PTR_ERR(adc_dev->reg); in cc10001_adc_probe()
343 ret = regulator_enable(adc_dev->reg); in cc10001_adc_probe()
347 ret = devm_add_action_or_reset(dev, cc10001_reg_disable, adc_dev->reg); in cc10001_adc_probe()
351 indio_dev->name = dev_name(dev); in cc10001_adc_probe()
352 indio_dev->info = &cc10001_adc_info; in cc10001_adc_probe()
353 indio_dev->modes = INDIO_DIRECT_MODE; in cc10001_adc_probe()
355 adc_dev->reg_base = devm_platform_ioremap_resource(pdev, 0); in cc10001_adc_probe()
356 if (IS_ERR(adc_dev->reg_base)) in cc10001_adc_probe()
357 return PTR_ERR(adc_dev->reg_base); in cc10001_adc_probe()
359 adc_dev->adc_clk = devm_clk_get_enabled(dev, "adc"); in cc10001_adc_probe()
360 if (IS_ERR(adc_dev->adc_clk)) { in cc10001_adc_probe()
362 return PTR_ERR(adc_dev->adc_clk); in cc10001_adc_probe()
365 adc_clk_rate = clk_get_rate(adc_dev->adc_clk); in cc10001_adc_probe()
368 return -EINVAL; in cc10001_adc_probe()
371 adc_dev->eoc_delay_ns = NSEC_PER_SEC / adc_clk_rate; in cc10001_adc_probe()
372 adc_dev->start_delay_ns = adc_dev->eoc_delay_ns * CC10001_WAIT_CYCLES; in cc10001_adc_probe()
375 * There is only one register to power-up/power-down the AUX ADC. in cc10001_adc_probe()
376 * If the ADC is shared among multiple CPUs, always power it up here. in cc10001_adc_probe()
377 * If the ADC is used only by the MIPS, power-up/power-down at runtime. in cc10001_adc_probe()
379 if (adc_dev->shared) in cc10001_adc_probe()
385 /* Setup the ADC channels available on the device */ in cc10001_adc_probe()
390 mutex_init(&adc_dev->lock); in cc10001_adc_probe()
401 { .compatible = "cosmic,10001-adc", },
408 .name = "cc10001-adc",
416 MODULE_DESCRIPTION("Cosmic Circuits ADC driver");