2019-03-26 22:51:38 +08:00
|
|
|
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
/*
|
|
|
|
* ADC driver for Basin Cove PMIC
|
|
|
|
*
|
|
|
|
* Copyright (C) 2012 Intel Corporation
|
|
|
|
* Author: Bin Yang <bin.yang@intel.com>
|
|
|
|
*
|
|
|
|
* Rewritten for upstream by:
|
|
|
|
* Vincent Pelletier <plr.vincent@gmail.com>
|
|
|
|
* Andy Shevchenko <andriy.shevchenko@linux.intel.com>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
#include <linux/completion.h>
|
|
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <linux/mfd/intel_soc_pmic.h>
|
|
|
|
#include <linux/mfd/intel_soc_pmic_mrfld.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/mutex.h>
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/regmap.h>
|
|
|
|
|
|
|
|
#include <linux/iio/driver.h>
|
|
|
|
#include <linux/iio/iio.h>
|
|
|
|
#include <linux/iio/machine.h>
|
|
|
|
|
|
|
|
#include <asm/unaligned.h>
|
|
|
|
|
|
|
|
#define BCOVE_GPADCREQ 0xDC
|
|
|
|
#define BCOVE_GPADCREQ_BUSY BIT(0)
|
|
|
|
#define BCOVE_GPADCREQ_IRQEN BIT(1)
|
|
|
|
|
|
|
|
#define BCOVE_ADCIRQ_ALL ( \
|
|
|
|
BCOVE_ADCIRQ_BATTEMP | \
|
|
|
|
BCOVE_ADCIRQ_SYSTEMP | \
|
|
|
|
BCOVE_ADCIRQ_BATTID | \
|
|
|
|
BCOVE_ADCIRQ_VIBATT | \
|
|
|
|
BCOVE_ADCIRQ_CCTICK)
|
|
|
|
|
|
|
|
#define BCOVE_ADC_TIMEOUT msecs_to_jiffies(1000)
|
|
|
|
|
|
|
|
static const u8 mrfld_adc_requests[] = {
|
|
|
|
BCOVE_ADCIRQ_VIBATT,
|
|
|
|
BCOVE_ADCIRQ_BATTID,
|
|
|
|
BCOVE_ADCIRQ_VIBATT,
|
|
|
|
BCOVE_ADCIRQ_SYSTEMP,
|
|
|
|
BCOVE_ADCIRQ_BATTEMP,
|
|
|
|
BCOVE_ADCIRQ_BATTEMP,
|
|
|
|
BCOVE_ADCIRQ_SYSTEMP,
|
|
|
|
BCOVE_ADCIRQ_SYSTEMP,
|
|
|
|
BCOVE_ADCIRQ_SYSTEMP,
|
|
|
|
};
|
|
|
|
|
|
|
|
struct mrfld_adc {
|
|
|
|
struct regmap *regmap;
|
|
|
|
struct completion completion;
|
|
|
|
/* Lock to protect the IPC transfers */
|
|
|
|
struct mutex lock;
|
|
|
|
};
|
|
|
|
|
|
|
|
static irqreturn_t mrfld_adc_thread_isr(int irq, void *data)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = data;
|
|
|
|
struct mrfld_adc *adc = iio_priv(indio_dev);
|
|
|
|
|
|
|
|
complete(&adc->completion);
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int mrfld_adc_single_conv(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan,
|
|
|
|
int *result)
|
|
|
|
{
|
|
|
|
struct mrfld_adc *adc = iio_priv(indio_dev);
|
|
|
|
struct regmap *regmap = adc->regmap;
|
|
|
|
unsigned int req;
|
|
|
|
long timeout;
|
2020-03-11 17:22:23 +08:00
|
|
|
__be16 value;
|
2019-03-26 22:51:38 +08:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
reinit_completion(&adc->completion);
|
|
|
|
|
|
|
|
regmap_update_bits(regmap, BCOVE_MADCIRQ, BCOVE_ADCIRQ_ALL, 0);
|
|
|
|
regmap_update_bits(regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_ADC, 0);
|
|
|
|
|
|
|
|
ret = regmap_read_poll_timeout(regmap, BCOVE_GPADCREQ, req,
|
|
|
|
!(req & BCOVE_GPADCREQ_BUSY),
|
|
|
|
2000, 1000000);
|
|
|
|
if (ret)
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
req = mrfld_adc_requests[chan->channel];
|
|
|
|
ret = regmap_write(regmap, BCOVE_GPADCREQ, BCOVE_GPADCREQ_IRQEN | req);
|
|
|
|
if (ret)
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
timeout = wait_for_completion_interruptible_timeout(&adc->completion,
|
|
|
|
BCOVE_ADC_TIMEOUT);
|
|
|
|
if (timeout < 0) {
|
|
|
|
ret = timeout;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
if (timeout == 0) {
|
|
|
|
ret = -ETIMEDOUT;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
2020-03-11 17:22:23 +08:00
|
|
|
ret = regmap_bulk_read(regmap, chan->address, &value, sizeof(value));
|
2019-03-26 22:51:38 +08:00
|
|
|
if (ret)
|
|
|
|
goto done;
|
|
|
|
|
2020-03-11 17:22:23 +08:00
|
|
|
*result = be16_to_cpu(value);
|
2019-03-26 22:51:38 +08:00
|
|
|
ret = IIO_VAL_INT;
|
|
|
|
|
|
|
|
done:
|
|
|
|
regmap_update_bits(regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_ADC, 0xff);
|
|
|
|
regmap_update_bits(regmap, BCOVE_MADCIRQ, BCOVE_ADCIRQ_ALL, 0xff);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int mrfld_adc_read_raw(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan,
|
|
|
|
int *val, int *val2, long mask)
|
|
|
|
{
|
|
|
|
struct mrfld_adc *adc = iio_priv(indio_dev);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
switch (mask) {
|
|
|
|
case IIO_CHAN_INFO_RAW:
|
|
|
|
mutex_lock(&adc->lock);
|
|
|
|
ret = mrfld_adc_single_conv(indio_dev, chan, val);
|
|
|
|
mutex_unlock(&adc->lock);
|
|
|
|
return ret;
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct iio_info mrfld_adc_iio_info = {
|
|
|
|
.read_raw = &mrfld_adc_read_raw,
|
|
|
|
};
|
|
|
|
|
|
|
|
#define BCOVE_ADC_CHANNEL(_type, _channel, _datasheet_name, _address) \
|
|
|
|
{ \
|
|
|
|
.indexed = 1, \
|
|
|
|
.type = _type, \
|
|
|
|
.channel = _channel, \
|
|
|
|
.address = _address, \
|
|
|
|
.datasheet_name = _datasheet_name, \
|
|
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct iio_chan_spec mrfld_adc_channels[] = {
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_VOLTAGE, 0, "CH0", 0xE9),
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_RESISTANCE, 1, "CH1", 0xEB),
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_CURRENT, 2, "CH2", 0xED),
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_TEMP, 3, "CH3", 0xCC),
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_TEMP, 4, "CH4", 0xC8),
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_TEMP, 5, "CH5", 0xCA),
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_TEMP, 6, "CH6", 0xC2),
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_TEMP, 7, "CH7", 0xC4),
|
|
|
|
BCOVE_ADC_CHANNEL(IIO_TEMP, 8, "CH8", 0xC6),
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct iio_map iio_maps[] = {
|
|
|
|
IIO_MAP("CH0", "bcove-battery", "VBATRSLT"),
|
|
|
|
IIO_MAP("CH1", "bcove-battery", "BATTID"),
|
|
|
|
IIO_MAP("CH2", "bcove-battery", "IBATRSLT"),
|
|
|
|
IIO_MAP("CH3", "bcove-temp", "PMICTEMP"),
|
|
|
|
IIO_MAP("CH4", "bcove-temp", "BATTEMP0"),
|
|
|
|
IIO_MAP("CH5", "bcove-temp", "BATTEMP1"),
|
|
|
|
IIO_MAP("CH6", "bcove-temp", "SYSTEMP0"),
|
|
|
|
IIO_MAP("CH7", "bcove-temp", "SYSTEMP1"),
|
|
|
|
IIO_MAP("CH8", "bcove-temp", "SYSTEMP2"),
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
|
|
|
|
static int mrfld_adc_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct device *dev = &pdev->dev;
|
|
|
|
struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent);
|
|
|
|
struct iio_dev *indio_dev;
|
|
|
|
struct mrfld_adc *adc;
|
|
|
|
int irq;
|
|
|
|
int ret;
|
|
|
|
|
2019-11-19 14:21:24 +08:00
|
|
|
indio_dev = devm_iio_device_alloc(dev, sizeof(struct mrfld_adc));
|
2019-03-26 22:51:38 +08:00
|
|
|
if (!indio_dev)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
adc = iio_priv(indio_dev);
|
|
|
|
|
|
|
|
mutex_init(&adc->lock);
|
|
|
|
init_completion(&adc->completion);
|
|
|
|
adc->regmap = pmic->regmap;
|
|
|
|
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
|
|
if (irq < 0)
|
|
|
|
return irq;
|
|
|
|
|
|
|
|
ret = devm_request_threaded_irq(dev, irq, NULL, mrfld_adc_thread_isr,
|
|
|
|
IRQF_ONESHOT | IRQF_SHARED, pdev->name,
|
|
|
|
indio_dev);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, indio_dev);
|
|
|
|
|
|
|
|
indio_dev->name = pdev->name;
|
|
|
|
|
|
|
|
indio_dev->channels = mrfld_adc_channels;
|
|
|
|
indio_dev->num_channels = ARRAY_SIZE(mrfld_adc_channels);
|
|
|
|
indio_dev->info = &mrfld_adc_iio_info;
|
|
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
|
|
|
|
ret = iio_map_array_register(indio_dev, iio_maps);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = devm_iio_device_register(dev, indio_dev);
|
|
|
|
if (ret < 0)
|
|
|
|
goto err_array_unregister;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_array_unregister:
|
|
|
|
iio_map_array_unregister(indio_dev);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int mrfld_adc_remove(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
|
|
|
|
|
|
|
|
iio_map_array_unregister(indio_dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct platform_device_id mrfld_adc_id_table[] = {
|
|
|
|
{ .name = "mrfld_bcove_adc" },
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(platform, mrfld_adc_id_table);
|
|
|
|
|
|
|
|
static struct platform_driver mrfld_adc_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "mrfld_bcove_adc",
|
|
|
|
},
|
|
|
|
.probe = mrfld_adc_probe,
|
|
|
|
.remove = mrfld_adc_remove,
|
|
|
|
.id_table = mrfld_adc_id_table,
|
|
|
|
};
|
|
|
|
module_platform_driver(mrfld_adc_driver);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Bin Yang <bin.yang@intel.com>");
|
|
|
|
MODULE_AUTHOR("Vincent Pelletier <plr.vincent@gmail.com>");
|
|
|
|
MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
|
|
|
|
MODULE_DESCRIPTION("ADC driver for Basin Cove PMIC");
|
|
|
|
MODULE_LICENSE("GPL v2");
|