On 02/02/16 17:50, Andrew F. Davis wrote: > Add driver for the TI AFE4404 heart rate monitor and pulse oximeter. > This device detects reflected LED light fluctuations and presents an ADC > value to the user space for further signal processing. > > Datasheet: http://www.ti.com/product/AFE4404/datasheet > > Signed-off-by: Andrew F. Davis <a...@ti.com> You forgot to unwind the buffer, trigger and regulator in the error path within probe. Otherwise fine so I'll fix that up. Please check I didn't mess it up though.
Applied to the togreg branch of iio.git - initially pushed out as testing for the autobuilders to play with it. Thanks for you perseverance with this one! Jonathan > --- > .../ABI/testing/sysfs-bus-iio-health-afe440x | 54 ++ > drivers/iio/health/Kconfig | 19 +- > drivers/iio/health/Makefile | 1 + > drivers/iio/health/afe4404.c | 668 > +++++++++++++++++++++ > drivers/iio/health/afe440x.h | 191 ++++++ > 5 files changed, 932 insertions(+), 1 deletion(-) > create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-health-afe440x > create mode 100644 drivers/iio/health/afe4404.c > create mode 100644 drivers/iio/health/afe440x.h > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x > b/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x > new file mode 100644 > index 0000000..3740f25 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-bus-iio-health-afe440x > @@ -0,0 +1,54 @@ > +What: /sys/bus/iio/devices/iio:deviceX/tia_resistanceY > + /sys/bus/iio/devices/iio:deviceX/tia_capacitanceY > +Date: December 2015 > +KernelVersion: > +Contact: Andrew F. Davis <a...@ti.com> > +Description: > + Get and set the resistance and the capacitance settings for the > + Transimpedance Amplifier. Y is 1 for Rf1 and Cf1, Y is 2 for > + Rf2 and Cf2 values. > + > +What: /sys/bus/iio/devices/iio:deviceX/tia_separate_en > +Date: December 2015 > +KernelVersion: > +Contact: Andrew F. Davis <a...@ti.com> > +Description: > + Enable or disable separate settings for the TransImpedance > + Amplifier above, when disabled both values are set by the > + first channel. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_intensity_ledY_raw > + /sys/bus/iio/devices/iio:deviceX/in_intensity_ledY_ambient_raw > +Date: December 2015 > +KernelVersion: > +Contact: Andrew F. Davis <a...@ti.com> > +Description: > + Get measured values from the ADC for these stages. Y is the > + specific LED number. The values are expressed in 24-bit twos > + complement. > + > +What: > /sys/bus/iio/devices/iio:deviceX/in_intensity_ledY-ledY_ambient_raw > +Date: December 2015 > +KernelVersion: > +Contact: Andrew F. Davis <a...@ti.com> > +Description: > + Get differential values from the ADC for these stages. Y is the > + specific LED number. The values are expressed in 24-bit twos > + complement for the specified LEDs. > + > +What: /sys/bus/iio/devices/iio:deviceX/out_current_ledY_offset > + /sys/bus/iio/devices/iio:deviceX/out_current_ledY_ambient_offset > +Date: December 2015 > +KernelVersion: > +Contact: Andrew F. Davis <a...@ti.com> > +Description: > + Get and set the offset cancellation DAC setting for these > + stages. The values are expressed in 5-bit sign-magnitude. > + > +What: /sys/bus/iio/devices/iio:deviceX/out_current_ledY_raw > +Date: December 2015 > +KernelVersion: > +Contact: Andrew F. Davis <a...@ti.com> > +Description: > + Get and set the LED current for the specified LED. Y is the > + specific LED number. > diff --git a/drivers/iio/health/Kconfig b/drivers/iio/health/Kconfig > index a647679..632a14b 100644 > --- a/drivers/iio/health/Kconfig > +++ b/drivers/iio/health/Kconfig > @@ -3,7 +3,22 @@ > # > # When adding new entries keep the list in alphabetical order > > -menu "Health sensors" > +menu "Health Sensors" > + > +menu "Heart Rate Monitors" > + > +config AFE4404 > + tristate "TI AFE4404 heart rate and pulse oximeter sensor" > + depends on I2C > + select REGMAP_I2C > + select IIO_BUFFER > + select IIO_TRIGGERED_BUFFER > + help > + Say yes to choose the Texas Instruments AFE4404 > + heart rate monitor and low-cost pulse oximeter. > + > + To compile this driver as a module, choose M here: the > + module will be called afe4404. > > config MAX30100 > tristate "MAX30100 heart rate and pulse oximeter sensor" > @@ -19,3 +34,5 @@ config MAX30100 > module will be called max30100. > > endmenu > + > +endmenu > diff --git a/drivers/iio/health/Makefile b/drivers/iio/health/Makefile > index 7c475d7..b37c0d5 100644 > --- a/drivers/iio/health/Makefile > +++ b/drivers/iio/health/Makefile > @@ -4,4 +4,5 @@ > > # When adding new entries keep the list in alphabetical order > > +obj-$(CONFIG_AFE4404) += afe4404.o > obj-$(CONFIG_MAX30100) += max30100.o > diff --git a/drivers/iio/health/afe4404.c b/drivers/iio/health/afe4404.c > new file mode 100644 > index 0000000..73f600c > --- /dev/null > +++ b/drivers/iio/health/afe4404.c > @@ -0,0 +1,668 @@ > +/* > + * AFE4404 Heart Rate Monitors and Low-Cost Pulse Oximeters > + * > + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ > + * Andrew F. Davis <a...@ti.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, but > + * WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * General Public License for more details. > + */ > + > +#include <linux/device.h> > +#include <linux/err.h> > +#include <linux/interrupt.h> > +#include <linux/i2c.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/regmap.h> > +#include <linux/sysfs.h> > +#include <linux/regulator/consumer.h> > + > +#include <linux/iio/iio.h> > +#include <linux/iio/sysfs.h> > +#include <linux/iio/buffer.h> > +#include <linux/iio/trigger.h> > +#include <linux/iio/triggered_buffer.h> > +#include <linux/iio/trigger_consumer.h> > + > +#include "afe440x.h" > + > +#define AFE4404_DRIVER_NAME "afe4404" > + > +/* AFE4404 registers */ > +#define AFE4404_TIA_GAIN_SEP 0x20 > +#define AFE4404_TIA_GAIN 0x21 > +#define AFE4404_PROG_TG_STC 0x34 > +#define AFE4404_PROG_TG_ENDC 0x35 > +#define AFE4404_LED3LEDSTC 0x36 > +#define AFE4404_LED3LEDENDC 0x37 > +#define AFE4404_CLKDIV_PRF 0x39 > +#define AFE4404_OFFDAC 0x3a > +#define AFE4404_DEC 0x3d > +#define AFE4404_AVG_LED2_ALED2VAL 0x3f > +#define AFE4404_AVG_LED1_ALED1VAL 0x40 > + > +/* AFE4404 GAIN register fields */ > +#define AFE4404_TIA_GAIN_RES_MASK GENMASK(2, 0) > +#define AFE4404_TIA_GAIN_RES_SHIFT 0 > +#define AFE4404_TIA_GAIN_CAP_MASK GENMASK(5, 3) > +#define AFE4404_TIA_GAIN_CAP_SHIFT 3 > + > +/* AFE4404 LEDCNTRL register fields */ > +#define AFE4404_LEDCNTRL_ILED1_MASK GENMASK(5, 0) > +#define AFE4404_LEDCNTRL_ILED1_SHIFT 0 > +#define AFE4404_LEDCNTRL_ILED2_MASK GENMASK(11, 6) > +#define AFE4404_LEDCNTRL_ILED2_SHIFT 6 > +#define AFE4404_LEDCNTRL_ILED3_MASK GENMASK(17, 12) > +#define AFE4404_LEDCNTRL_ILED3_SHIFT 12 > + > +/* AFE4404 CONTROL2 register fields */ > +#define AFE440X_CONTROL2_ILED_2X_MASK BIT(17) > +#define AFE440X_CONTROL2_ILED_2X_SHIFT 17 > + > +/* AFE4404 CONTROL3 register fields */ > +#define AFE440X_CONTROL3_OSC_ENABLE BIT(9) > + > +/* AFE4404 OFFDAC register current fields */ > +#define AFE4404_OFFDAC_CURR_LED1_MASK GENMASK(9, 5) > +#define AFE4404_OFFDAC_CURR_LED1_SHIFT 5 > +#define AFE4404_OFFDAC_CURR_LED2_MASK GENMASK(19, 15) > +#define AFE4404_OFFDAC_CURR_LED2_SHIFT 15 > +#define AFE4404_OFFDAC_CURR_LED3_MASK GENMASK(4, 0) > +#define AFE4404_OFFDAC_CURR_LED3_SHIFT 0 > +#define AFE4404_OFFDAC_CURR_ALED1_MASK GENMASK(14, 10) > +#define AFE4404_OFFDAC_CURR_ALED1_SHIFT 10 > +#define AFE4404_OFFDAC_CURR_ALED2_MASK GENMASK(4, 0) > +#define AFE4404_OFFDAC_CURR_ALED2_SHIFT 0 > + > +/* AFE4404 NULL fields */ > +#define NULL_MASK 0 > +#define NULL_SHIFT 0 > + > +/* AFE4404 TIA_GAIN_CAP values */ > +#define AFE4404_TIA_GAIN_CAP_5_P 0x0 > +#define AFE4404_TIA_GAIN_CAP_2_5_P 0x1 > +#define AFE4404_TIA_GAIN_CAP_10_P 0x2 > +#define AFE4404_TIA_GAIN_CAP_7_5_P 0x3 > +#define AFE4404_TIA_GAIN_CAP_20_P 0x4 > +#define AFE4404_TIA_GAIN_CAP_17_5_P 0x5 > +#define AFE4404_TIA_GAIN_CAP_25_P 0x6 > +#define AFE4404_TIA_GAIN_CAP_22_5_P 0x7 > + > +/* AFE4404 TIA_GAIN_RES values */ > +#define AFE4404_TIA_GAIN_RES_500_K 0x0 > +#define AFE4404_TIA_GAIN_RES_250_K 0x1 > +#define AFE4404_TIA_GAIN_RES_100_K 0x2 > +#define AFE4404_TIA_GAIN_RES_50_K 0x3 > +#define AFE4404_TIA_GAIN_RES_25_K 0x4 > +#define AFE4404_TIA_GAIN_RES_10_K 0x5 > +#define AFE4404_TIA_GAIN_RES_1_M 0x6 > +#define AFE4404_TIA_GAIN_RES_2_M 0x7 > + > +/** > + * struct afe4404_data > + * @dev - Device structure > + * @regmap - Register map of the device > + * @regulator - Pointer to the regulator for the IC > + * @trig - IIO trigger for this device > + * @irq - ADC_RDY line interrupt number > + */ > +struct afe4404_data { > + struct device *dev; > + struct regmap *regmap; > + struct regulator *regulator; > + struct iio_trigger *trig; > + int irq; > +}; > + > +enum afe4404_chan_id { > + LED1, > + ALED1, > + LED2, > + ALED2, > + LED3, > + LED1_ALED1, > + LED2_ALED2, > + ILED1, > + ILED2, > + ILED3, > +}; > + > +static const struct afe440x_reg_info afe4404_reg_info[] = { > + [LED1] = AFE440X_REG_INFO(AFE440X_LED1VAL, AFE4404_OFFDAC, > AFE4404_OFFDAC_CURR_LED1), > + [ALED1] = AFE440X_REG_INFO(AFE440X_ALED1VAL, AFE4404_OFFDAC, > AFE4404_OFFDAC_CURR_ALED1), > + [LED2] = AFE440X_REG_INFO(AFE440X_LED2VAL, AFE4404_OFFDAC, > AFE4404_OFFDAC_CURR_LED2), > + [ALED2] = AFE440X_REG_INFO(AFE440X_ALED2VAL, AFE4404_OFFDAC, > AFE4404_OFFDAC_CURR_ALED2), > + [LED3] = AFE440X_REG_INFO(AFE440X_ALED2VAL, 0, NULL), > + [LED1_ALED1] = AFE440X_REG_INFO(AFE440X_LED1_ALED1VAL, 0, NULL), > + [LED2_ALED2] = AFE440X_REG_INFO(AFE440X_LED2_ALED2VAL, 0, NULL), > + [ILED1] = AFE440X_REG_INFO(AFE440X_LEDCNTRL, 0, AFE4404_LEDCNTRL_ILED1), > + [ILED2] = AFE440X_REG_INFO(AFE440X_LEDCNTRL, 0, AFE4404_LEDCNTRL_ILED2), > + [ILED3] = AFE440X_REG_INFO(AFE440X_LEDCNTRL, 0, AFE4404_LEDCNTRL_ILED3), > +}; > + > +static const struct iio_chan_spec afe4404_channels[] = { > + /* ADC values */ > + AFE440X_INTENSITY_CHAN(LED1, "led1", BIT(IIO_CHAN_INFO_OFFSET)), > + AFE440X_INTENSITY_CHAN(ALED1, "led1_ambient", > BIT(IIO_CHAN_INFO_OFFSET)), > + AFE440X_INTENSITY_CHAN(LED2, "led2", BIT(IIO_CHAN_INFO_OFFSET)), > + AFE440X_INTENSITY_CHAN(ALED2, "led2_ambient", > BIT(IIO_CHAN_INFO_OFFSET)), > + AFE440X_INTENSITY_CHAN(LED3, "led3", BIT(IIO_CHAN_INFO_OFFSET)), > + AFE440X_INTENSITY_CHAN(LED1_ALED1, "led1-led1_ambient", 0), > + AFE440X_INTENSITY_CHAN(LED2_ALED2, "led2-led2_ambient", 0), > + /* LED current */ > + AFE440X_CURRENT_CHAN(ILED1, "led1"), > + AFE440X_CURRENT_CHAN(ILED2, "led2"), > + AFE440X_CURRENT_CHAN(ILED3, "led3"), > +}; > + > +static const struct afe440x_val_table afe4404_res_table[] = { > + { .integer = 500000, .fract = 0 }, > + { .integer = 250000, .fract = 0 }, > + { .integer = 100000, .fract = 0 }, > + { .integer = 50000, .fract = 0 }, > + { .integer = 25000, .fract = 0 }, > + { .integer = 10000, .fract = 0 }, > + { .integer = 1000000, .fract = 0 }, > + { .integer = 2000000, .fract = 0 }, > +}; > +AFE440X_TABLE_ATTR(tia_resistance_available, afe4404_res_table); > + > +static const struct afe440x_val_table afe4404_cap_table[] = { > + { .integer = 0, .fract = 5000 }, > + { .integer = 0, .fract = 2500 }, > + { .integer = 0, .fract = 10000 }, > + { .integer = 0, .fract = 7500 }, > + { .integer = 0, .fract = 20000 }, > + { .integer = 0, .fract = 17500 }, > + { .integer = 0, .fract = 25000 }, > + { .integer = 0, .fract = 22500 }, > +}; > +AFE440X_TABLE_ATTR(tia_capacitance_available, afe4404_cap_table); > + > +static ssize_t afe440x_show_register(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct iio_dev *indio_dev = dev_to_iio_dev(dev); > + struct afe4404_data *afe = iio_priv(indio_dev); > + struct afe440x_attr *afe440x_attr = to_afe440x_attr(attr); > + unsigned int reg_val, type; > + int vals[2]; > + int ret, val_len; > + > + ret = regmap_read(afe->regmap, afe440x_attr->reg, ®_val); > + if (ret) > + return ret; > + > + reg_val &= afe440x_attr->mask; > + reg_val >>= afe440x_attr->shift; > + > + switch (afe440x_attr->type) { > + case SIMPLE: > + type = IIO_VAL_INT; > + val_len = 1; > + vals[0] = reg_val; > + break; > + case RESISTANCE: > + case CAPACITANCE: > + type = IIO_VAL_INT_PLUS_MICRO; > + val_len = 2; > + if (reg_val < afe440x_attr->table_size) { > + vals[0] = afe440x_attr->val_table[reg_val].integer; > + vals[1] = afe440x_attr->val_table[reg_val].fract; > + break; > + } > + return -EINVAL; > + default: > + return -EINVAL; > + } > + > + return iio_format_value(buf, type, val_len, vals); > +} > + > +static ssize_t afe440x_store_register(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t count) > +{ > + struct iio_dev *indio_dev = dev_to_iio_dev(dev); > + struct afe4404_data *afe = iio_priv(indio_dev); > + struct afe440x_attr *afe440x_attr = to_afe440x_attr(attr); > + int val, integer, fract, ret; > + > + ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract); > + if (ret) > + return ret; > + > + switch (afe440x_attr->type) { > + case SIMPLE: > + val = integer; > + break; > + case RESISTANCE: > + case CAPACITANCE: > + for (val = 0; val < afe440x_attr->table_size; val++) > + if (afe440x_attr->val_table[val].integer == integer && > + afe440x_attr->val_table[val].fract == fract) > + break; > + if (val == afe440x_attr->table_size) > + return -EINVAL; > + break; > + default: > + return -EINVAL; > + } > + > + ret = regmap_update_bits(afe->regmap, afe440x_attr->reg, > + afe440x_attr->mask, > + (val << afe440x_attr->shift)); > + if (ret) > + return ret; > + > + return count; > +} > + > +static AFE440X_ATTR(tia_separate_en, AFE4404_TIA_GAIN_SEP, > AFE440X_TIAGAIN_ENSEPGAIN, SIMPLE, NULL, 0); > + > +static AFE440X_ATTR(tia_resistance1, AFE4404_TIA_GAIN, AFE4404_TIA_GAIN_RES, > RESISTANCE, afe4404_res_table, ARRAY_SIZE(afe4404_res_table)); > +static AFE440X_ATTR(tia_capacitance1, AFE4404_TIA_GAIN, > AFE4404_TIA_GAIN_CAP, CAPACITANCE, afe4404_cap_table, > ARRAY_SIZE(afe4404_cap_table)); > + > +static AFE440X_ATTR(tia_resistance2, AFE4404_TIA_GAIN_SEP, > AFE4404_TIA_GAIN_RES, RESISTANCE, afe4404_res_table, > ARRAY_SIZE(afe4404_res_table)); > +static AFE440X_ATTR(tia_capacitance2, AFE4404_TIA_GAIN_SEP, > AFE4404_TIA_GAIN_CAP, CAPACITANCE, afe4404_cap_table, > ARRAY_SIZE(afe4404_cap_table)); > + > +static struct attribute *afe440x_attributes[] = { > + &afe440x_attr_tia_separate_en.dev_attr.attr, > + &afe440x_attr_tia_resistance1.dev_attr.attr, > + &afe440x_attr_tia_capacitance1.dev_attr.attr, > + &afe440x_attr_tia_resistance2.dev_attr.attr, > + &afe440x_attr_tia_capacitance2.dev_attr.attr, > + &dev_attr_tia_resistance_available.attr, > + &dev_attr_tia_capacitance_available.attr, > + NULL > +}; > + > +static const struct attribute_group afe440x_attribute_group = { > + .attrs = afe440x_attributes > +}; > + > +static int afe4404_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int *val, int *val2, long mask) > +{ > + struct afe4404_data *afe = iio_priv(indio_dev); > + const struct afe440x_reg_info reg_info = > afe4404_reg_info[chan->address]; > + int ret; > + > + switch (chan->type) { > + case IIO_INTENSITY: > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + ret = regmap_read(afe->regmap, reg_info.reg, val); > + if (ret) > + return ret; > + return IIO_VAL_INT; > + case IIO_CHAN_INFO_OFFSET: > + ret = regmap_read(afe->regmap, reg_info.offreg, > + val); > + if (ret) > + return ret; > + *val &= reg_info.mask; > + *val >>= reg_info.shift; > + return IIO_VAL_INT; > + } > + break; > + case IIO_CURRENT: > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + ret = regmap_read(afe->regmap, reg_info.reg, val); > + if (ret) > + return ret; > + *val &= reg_info.mask; > + *val >>= reg_info.shift; > + return IIO_VAL_INT; > + case IIO_CHAN_INFO_SCALE: > + *val = 0; > + *val2 = 800000; > + return IIO_VAL_INT_PLUS_MICRO; > + } > + break; > + default: > + break; > + } > + > + return -EINVAL; > +} > + > +static int afe4404_write_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int val, int val2, long mask) > +{ > + struct afe4404_data *afe = iio_priv(indio_dev); > + const struct afe440x_reg_info reg_info = > afe4404_reg_info[chan->address]; > + > + switch (chan->type) { > + case IIO_INTENSITY: > + switch (mask) { > + case IIO_CHAN_INFO_OFFSET: > + return regmap_update_bits(afe->regmap, > + reg_info.offreg, > + reg_info.mask, > + (val << reg_info.shift)); > + } > + break; > + case IIO_CURRENT: > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + return regmap_update_bits(afe->regmap, > + reg_info.reg, > + reg_info.mask, > + (val << reg_info.shift)); > + } > + break; > + default: > + break; > + } > + > + return -EINVAL; > +} > + > +static const struct iio_info afe4404_iio_info = { > + .attrs = &afe440x_attribute_group, > + .read_raw = afe4404_read_raw, > + .write_raw = afe4404_write_raw, > + .driver_module = THIS_MODULE, > +}; > + > +static irqreturn_t afe4404_trigger_handler(int irq, void *private) > +{ > + struct iio_poll_func *pf = private; > + struct iio_dev *indio_dev = pf->indio_dev; > + struct afe4404_data *afe = iio_priv(indio_dev); > + int ret, bit, i = 0; > + s32 buffer[10]; > + > + for_each_set_bit(bit, indio_dev->active_scan_mask, > + indio_dev->masklength) { > + ret = regmap_read(afe->regmap, afe4404_reg_info[bit].reg, > + &buffer[i++]); > + if (ret) > + goto err; > + } > + > + iio_push_to_buffers_with_timestamp(indio_dev, buffer, pf->timestamp); > +err: > + iio_trigger_notify_done(indio_dev->trig); > + > + return IRQ_HANDLED; > +} > + > +static const struct iio_trigger_ops afe4404_trigger_ops = { > + .owner = THIS_MODULE, > +}; > + > +/* Default timings from data-sheet */ > +#define AFE4404_TIMING_PAIRS \ > + { AFE440X_PRPCOUNT, 39999 }, \ > + { AFE440X_LED2LEDSTC, 0 }, \ > + { AFE440X_LED2LEDENDC, 398 }, \ > + { AFE440X_LED2STC, 80 }, \ > + { AFE440X_LED2ENDC, 398 }, \ > + { AFE440X_ADCRSTSTCT0, 5600 }, \ > + { AFE440X_ADCRSTENDCT0, 5606 }, \ > + { AFE440X_LED2CONVST, 5607 }, \ > + { AFE440X_LED2CONVEND, 6066 }, \ > + { AFE4404_LED3LEDSTC, 400 }, \ > + { AFE4404_LED3LEDENDC, 798 }, \ > + { AFE440X_ALED2STC, 480 }, \ > + { AFE440X_ALED2ENDC, 798 }, \ > + { AFE440X_ADCRSTSTCT1, 6068 }, \ > + { AFE440X_ADCRSTENDCT1, 6074 }, \ > + { AFE440X_ALED2CONVST, 6075 }, \ > + { AFE440X_ALED2CONVEND, 6534 }, \ > + { AFE440X_LED1LEDSTC, 800 }, \ > + { AFE440X_LED1LEDENDC, 1198 }, \ > + { AFE440X_LED1STC, 880 }, \ > + { AFE440X_LED1ENDC, 1198 }, \ > + { AFE440X_ADCRSTSTCT2, 6536 }, \ > + { AFE440X_ADCRSTENDCT2, 6542 }, \ > + { AFE440X_LED1CONVST, 6543 }, \ > + { AFE440X_LED1CONVEND, 7003 }, \ > + { AFE440X_ALED1STC, 1280 }, \ > + { AFE440X_ALED1ENDC, 1598 }, \ > + { AFE440X_ADCRSTSTCT3, 7005 }, \ > + { AFE440X_ADCRSTENDCT3, 7011 }, \ > + { AFE440X_ALED1CONVST, 7012 }, \ > + { AFE440X_ALED1CONVEND, 7471 }, \ > + { AFE440X_PDNCYCLESTC, 7671 }, \ > + { AFE440X_PDNCYCLEENDC, 39199 } > + > +static const struct reg_sequence afe4404_reg_sequences[] = { > + AFE4404_TIMING_PAIRS, > + { AFE440X_CONTROL1, AFE440X_CONTROL1_TIMEREN }, > + { AFE4404_TIA_GAIN, AFE4404_TIA_GAIN_RES_50_K }, > + { AFE440X_LEDCNTRL, (0xf << AFE4404_LEDCNTRL_ILED1_SHIFT) | > + (0x3 << AFE4404_LEDCNTRL_ILED2_SHIFT) | > + (0x3 << AFE4404_LEDCNTRL_ILED3_SHIFT) }, > + { AFE440X_CONTROL2, AFE440X_CONTROL3_OSC_ENABLE }, > +}; > + > +static const struct regmap_range afe4404_yes_ranges[] = { > + regmap_reg_range(AFE440X_LED2VAL, AFE440X_LED1_ALED1VAL), > + regmap_reg_range(AFE4404_AVG_LED2_ALED2VAL, AFE4404_AVG_LED1_ALED1VAL), > +}; > + > +static const struct regmap_access_table afe4404_volatile_table = { > + .yes_ranges = afe4404_yes_ranges, > + .n_yes_ranges = ARRAY_SIZE(afe4404_yes_ranges), > +}; > + > +static const struct regmap_config afe4404_regmap_config = { > + .reg_bits = 8, > + .val_bits = 24, > + > + .max_register = AFE4404_AVG_LED1_ALED1VAL, > + .cache_type = REGCACHE_RBTREE, > + .volatile_table = &afe4404_volatile_table, > +}; > + > +#ifdef CONFIG_OF > +static const struct of_device_id afe4404_of_match[] = { > + { .compatible = "ti,afe4404", }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, afe4404_of_match); > +#endif > + > +static int afe4404_suspend(struct device *dev) > +{ > + struct iio_dev *indio_dev = dev_to_iio_dev(dev); > + struct afe4404_data *afe = iio_priv(indio_dev); > + int ret; > + > + ret = regmap_update_bits(afe->regmap, AFE440X_CONTROL2, > + AFE440X_CONTROL2_PDN_AFE, > + AFE440X_CONTROL2_PDN_AFE); > + if (ret) > + return ret; > + > + ret = regulator_disable(afe->regulator); > + if (ret) { > + dev_err(dev, "Unable to disable regulator\n"); > + return ret; > + } > + > + return 0; > +} > + > +static int afe4404_resume(struct device *dev) > +{ > + struct iio_dev *indio_dev = dev_to_iio_dev(dev); > + struct afe4404_data *afe = iio_priv(indio_dev); > + int ret; > + > + ret = regulator_enable(afe->regulator); > + if (ret) { > + dev_err(dev, "Unable to enable regulator\n"); > + return ret; > + } > + > + ret = regmap_update_bits(afe->regmap, AFE440X_CONTROL2, > + AFE440X_CONTROL2_PDN_AFE, 0); > + if (ret) > + return ret; > + > + return 0; > +} > + > +static SIMPLE_DEV_PM_OPS(afe4404_pm_ops, afe4404_suspend, afe4404_resume); > + > +static int afe4404_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct iio_dev *indio_dev; > + struct afe4404_data *afe; > + int ret; > + > + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*afe)); > + if (!indio_dev) > + return -ENOMEM; > + > + afe = iio_priv(indio_dev); > + i2c_set_clientdata(client, indio_dev); > + > + afe->dev = &client->dev; > + afe->irq = client->irq; > + > + afe->regmap = devm_regmap_init_i2c(client, &afe4404_regmap_config); > + if (IS_ERR(afe->regmap)) { > + dev_err(afe->dev, "Unable to allocate register map\n"); > + return PTR_ERR(afe->regmap); > + } > + > + afe->regulator = devm_regulator_get(afe->dev, "tx_sup"); > + if (IS_ERR(afe->regulator)) { > + dev_err(afe->dev, "Unable to get regulator\n"); > + return PTR_ERR(afe->regulator); > + } > + ret = regulator_enable(afe->regulator); > + if (ret) { > + dev_err(afe->dev, "Unable to enable regulator\n"); > + return ret; > + } > + > + ret = regmap_write(afe->regmap, AFE440X_CONTROL0, > + AFE440X_CONTROL0_SW_RESET); > + if (ret) { > + dev_err(afe->dev, "Unable to reset device\n"); > + return ret; > + } > + > + ret = regmap_multi_reg_write(afe->regmap, afe4404_reg_sequences, > + ARRAY_SIZE(afe4404_reg_sequences)); > + if (ret) { > + dev_err(afe->dev, "Unable to set register defaults\n"); > + return ret; > + } > + > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->dev.parent = afe->dev; > + indio_dev->channels = afe4404_channels; > + indio_dev->num_channels = ARRAY_SIZE(afe4404_channels); > + indio_dev->name = AFE4404_DRIVER_NAME; > + indio_dev->info = &afe4404_iio_info; > + > + if (afe->irq > 0) { > + afe->trig = devm_iio_trigger_alloc(afe->dev, > + "%s-dev%d", > + indio_dev->name, > + indio_dev->id); > + if (!afe->trig) { > + dev_err(afe->dev, "Unable to allocate IIO trigger\n"); > + return -ENOMEM; > + } > + > + iio_trigger_set_drvdata(afe->trig, indio_dev); > + > + afe->trig->ops = &afe4404_trigger_ops; > + afe->trig->dev.parent = afe->dev; > + > + ret = iio_trigger_register(afe->trig); > + if (ret) { > + dev_err(afe->dev, "Unable to register IIO trigger\n"); > + return ret; > + } > + > + ret = devm_request_threaded_irq(afe->dev, afe->irq, > + > iio_trigger_generic_data_rdy_poll, > + NULL, IRQF_ONESHOT, > + AFE4404_DRIVER_NAME, > + afe->trig); > + if (ret) { > + dev_err(afe->dev, "Unable to request IRQ\n"); > + return ret; > + } > + } > + > + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, > + afe4404_trigger_handler, NULL); > + if (ret) { > + dev_err(afe->dev, "Unable to setup buffer\n"); > + return ret; > + } > + > + ret = iio_device_register(indio_dev); > + if (ret) { You need to also unwind the buffer here. > + dev_err(afe->dev, "Unable to register IIO device\n"); > + return ret; > + } > + > + return 0; > +} > + > +static int afe4404_remove(struct i2c_client *client) > +{ > + struct iio_dev *indio_dev = i2c_get_clientdata(client); > + struct afe4404_data *afe = iio_priv(indio_dev); > + int ret; > + > + iio_device_unregister(indio_dev); > + > + iio_triggered_buffer_cleanup(indio_dev); > + > + if (afe->irq > 0) > + iio_trigger_unregister(afe->trig); > + > + ret = regulator_disable(afe->regulator); > + if (ret) { > + dev_err(afe->dev, "Unable to disable regulator\n"); > + return ret; > + } > + > + return 0; > +} > + > +static const struct i2c_device_id afe4404_ids[] = { > + { "afe4404", 0 }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(i2c, afe4404_ids); > + > +static struct i2c_driver afe4404_i2c_driver = { > + .driver = { > + .name = AFE4404_DRIVER_NAME, > + .of_match_table = of_match_ptr(afe4404_of_match), > + .pm = &afe4404_pm_ops, > + }, > + .probe = afe4404_probe, > + .remove = afe4404_remove, > + .id_table = afe4404_ids, > +}; > +module_i2c_driver(afe4404_i2c_driver); > + > +MODULE_AUTHOR("Andrew F. Davis <a...@ti.com>"); > +MODULE_DESCRIPTION("TI AFE4404 Heart Rate and Pulse Oximeter"); > +MODULE_LICENSE("GPL v2"); > diff --git a/drivers/iio/health/afe440x.h b/drivers/iio/health/afe440x.h > new file mode 100644 > index 0000000..c671ab7 > --- /dev/null > +++ b/drivers/iio/health/afe440x.h > @@ -0,0 +1,191 @@ > +/* > + * AFE440X Heart Rate Monitors and Low-Cost Pulse Oximeters > + * > + * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ > + * Andrew F. Davis <a...@ti.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, but > + * WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * General Public License for more details. > + */ > + > +#ifndef _AFE440X_H > +#define _AFE440X_H > + > +/* AFE440X registers */ > +#define AFE440X_CONTROL0 0x00 > +#define AFE440X_LED2STC 0x01 > +#define AFE440X_LED2ENDC 0x02 > +#define AFE440X_LED1LEDSTC 0x03 > +#define AFE440X_LED1LEDENDC 0x04 > +#define AFE440X_ALED2STC 0x05 > +#define AFE440X_ALED2ENDC 0x06 > +#define AFE440X_LED1STC 0x07 > +#define AFE440X_LED1ENDC 0x08 > +#define AFE440X_LED2LEDSTC 0x09 > +#define AFE440X_LED2LEDENDC 0x0a > +#define AFE440X_ALED1STC 0x0b > +#define AFE440X_ALED1ENDC 0x0c > +#define AFE440X_LED2CONVST 0x0d > +#define AFE440X_LED2CONVEND 0x0e > +#define AFE440X_ALED2CONVST 0x0f > +#define AFE440X_ALED2CONVEND 0x10 > +#define AFE440X_LED1CONVST 0x11 > +#define AFE440X_LED1CONVEND 0x12 > +#define AFE440X_ALED1CONVST 0x13 > +#define AFE440X_ALED1CONVEND 0x14 > +#define AFE440X_ADCRSTSTCT0 0x15 > +#define AFE440X_ADCRSTENDCT0 0x16 > +#define AFE440X_ADCRSTSTCT1 0x17 > +#define AFE440X_ADCRSTENDCT1 0x18 > +#define AFE440X_ADCRSTSTCT2 0x19 > +#define AFE440X_ADCRSTENDCT2 0x1a > +#define AFE440X_ADCRSTSTCT3 0x1b > +#define AFE440X_ADCRSTENDCT3 0x1c > +#define AFE440X_PRPCOUNT 0x1d > +#define AFE440X_CONTROL1 0x1e > +#define AFE440X_LEDCNTRL 0x22 > +#define AFE440X_CONTROL2 0x23 > +#define AFE440X_ALARM 0x29 > +#define AFE440X_LED2VAL 0x2a > +#define AFE440X_ALED2VAL 0x2b > +#define AFE440X_LED1VAL 0x2c > +#define AFE440X_ALED1VAL 0x2d > +#define AFE440X_LED2_ALED2VAL 0x2e > +#define AFE440X_LED1_ALED1VAL 0x2f > +#define AFE440X_CONTROL3 0x31 > +#define AFE440X_PDNCYCLESTC 0x32 > +#define AFE440X_PDNCYCLEENDC 0x33 > + > +/* CONTROL0 register fields */ > +#define AFE440X_CONTROL0_REG_READ BIT(0) > +#define AFE440X_CONTROL0_TM_COUNT_RST BIT(1) > +#define AFE440X_CONTROL0_SW_RESET BIT(3) > + > +/* CONTROL1 register fields */ > +#define AFE440X_CONTROL1_TIMEREN BIT(8) > + > +/* TIAGAIN register fields */ > +#define AFE440X_TIAGAIN_ENSEPGAIN_MASK BIT(15) > +#define AFE440X_TIAGAIN_ENSEPGAIN_SHIFT 15 > + > +/* CONTROL2 register fields */ > +#define AFE440X_CONTROL2_PDN_AFE BIT(0) > +#define AFE440X_CONTROL2_PDN_RX BIT(1) > +#define AFE440X_CONTROL2_DYNAMIC4 BIT(3) > +#define AFE440X_CONTROL2_DYNAMIC3 BIT(4) > +#define AFE440X_CONTROL2_DYNAMIC2 BIT(14) > +#define AFE440X_CONTROL2_DYNAMIC1 BIT(20) > + > +/* CONTROL3 register fields */ > +#define AFE440X_CONTROL3_CLKDIV GENMASK(2, 0) > + > +/* CONTROL0 values */ > +#define AFE440X_CONTROL0_WRITE 0x0 > +#define AFE440X_CONTROL0_READ 0x1 > + > +struct afe440x_reg_info { > + unsigned int reg; > + unsigned int offreg; > + unsigned int shift; > + unsigned int mask; > +}; > + > +#define AFE440X_REG_INFO(_reg, _offreg, _sm) \ > + { \ > + .reg = _reg, \ > + .offreg = _offreg, \ > + .shift = _sm ## _SHIFT, \ > + .mask = _sm ## _MASK, \ > + } > + > +#define AFE440X_INTENSITY_CHAN(_index, _name, _mask) \ > + { \ > + .type = IIO_INTENSITY, \ > + .channel = _index, \ > + .address = _index, \ > + .scan_index = _index, \ > + .scan_type = { \ > + .sign = 's', \ > + .realbits = 24, \ > + .storagebits = 32, \ > + .endianness = IIO_CPU, \ > + }, \ > + .extend_name = _name, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ > + _mask, \ > + } > + > +#define AFE440X_CURRENT_CHAN(_index, _name) \ > + { \ > + .type = IIO_CURRENT, \ > + .channel = _index, \ > + .address = _index, \ > + .scan_index = _index, \ > + .extend_name = _name, \ > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ > + BIT(IIO_CHAN_INFO_SCALE), \ > + .output = true, \ > + } > + > +enum afe440x_reg_type { > + SIMPLE, > + RESISTANCE, > + CAPACITANCE, > +}; > + > +struct afe440x_val_table { > + int integer; > + int fract; > +}; > + > +#define AFE440X_TABLE_ATTR(_name, _table) \ > +static ssize_t _name ## _show(struct device *dev, \ > + struct device_attribute *attr, char *buf) \ > +{ \ > + ssize_t len = 0; \ > + int i; \ > + \ > + for (i = 0; i < ARRAY_SIZE(_table); i++) \ > + len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06u ", \ > + _table[i].integer, \ > + _table[i].fract); \ > + \ > + buf[len - 1] = '\n'; \ > + \ > + return len; \ > +} \ > +static DEVICE_ATTR_RO(_name) > + > +struct afe440x_attr { > + struct device_attribute dev_attr; > + unsigned int reg; > + unsigned int shift; > + unsigned int mask; > + enum afe440x_reg_type type; > + const struct afe440x_val_table *val_table; > + unsigned int table_size; > +}; > + > +#define to_afe440x_attr(_dev_attr) \ > + container_of(_dev_attr, struct afe440x_attr, dev_attr) > + > +#define AFE440X_ATTR(_name, _reg, _field, _type, _table, _size) \ > + struct afe440x_attr afe440x_attr_##_name = { \ > + .dev_attr = __ATTR(_name, (S_IRUGO | S_IWUSR), \ > + afe440x_show_register, \ > + afe440x_store_register), \ > + .reg = _reg, \ > + .shift = _field ## _SHIFT, \ > + .mask = _field ## _MASK, \ > + .type = _type, \ > + .val_table = _table, \ > + .table_size = _size, \ > + } > + > +#endif /* _AFE440X_H */ >
