forked from Minki/linux
daffd7a75c
The drivers DT tables are not built-in when OF is not enabled, this does not save us enough to justify ugly ifdefs. Clean this up. Signed-off-by: Andrew F. Davis <afd@ti.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
678 lines
19 KiB
C
678 lines
19 KiB
C
/*
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* AFE4404 Heart Rate Monitors and Low-Cost Pulse Oximeters
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*
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* Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
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* Andrew F. Davis <afd@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/sysfs.h>
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#include <linux/regulator/consumer.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/trigger.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/iio/trigger_consumer.h>
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#include "afe440x.h"
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#define AFE4404_DRIVER_NAME "afe4404"
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/* AFE4404 registers */
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#define AFE4404_TIA_GAIN_SEP 0x20
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#define AFE4404_TIA_GAIN 0x21
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#define AFE4404_PROG_TG_STC 0x34
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#define AFE4404_PROG_TG_ENDC 0x35
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#define AFE4404_LED3LEDSTC 0x36
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#define AFE4404_LED3LEDENDC 0x37
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#define AFE4404_CLKDIV_PRF 0x39
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#define AFE4404_OFFDAC 0x3a
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#define AFE4404_DEC 0x3d
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#define AFE4404_AVG_LED2_ALED2VAL 0x3f
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#define AFE4404_AVG_LED1_ALED1VAL 0x40
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/* AFE4404 GAIN register fields */
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#define AFE4404_TIA_GAIN_RES_MASK GENMASK(2, 0)
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#define AFE4404_TIA_GAIN_RES_SHIFT 0
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#define AFE4404_TIA_GAIN_CAP_MASK GENMASK(5, 3)
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#define AFE4404_TIA_GAIN_CAP_SHIFT 3
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/* AFE4404 LEDCNTRL register fields */
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#define AFE4404_LEDCNTRL_ILED1_MASK GENMASK(5, 0)
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#define AFE4404_LEDCNTRL_ILED1_SHIFT 0
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#define AFE4404_LEDCNTRL_ILED2_MASK GENMASK(11, 6)
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#define AFE4404_LEDCNTRL_ILED2_SHIFT 6
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#define AFE4404_LEDCNTRL_ILED3_MASK GENMASK(17, 12)
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#define AFE4404_LEDCNTRL_ILED3_SHIFT 12
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/* AFE4404 CONTROL2 register fields */
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#define AFE440X_CONTROL2_ILED_2X_MASK BIT(17)
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#define AFE440X_CONTROL2_ILED_2X_SHIFT 17
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/* AFE4404 CONTROL3 register fields */
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#define AFE440X_CONTROL3_OSC_ENABLE BIT(9)
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/* AFE4404 OFFDAC register current fields */
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#define AFE4404_OFFDAC_CURR_LED1_MASK GENMASK(9, 5)
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#define AFE4404_OFFDAC_CURR_LED1_SHIFT 5
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#define AFE4404_OFFDAC_CURR_LED2_MASK GENMASK(19, 15)
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#define AFE4404_OFFDAC_CURR_LED2_SHIFT 15
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#define AFE4404_OFFDAC_CURR_LED3_MASK GENMASK(4, 0)
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#define AFE4404_OFFDAC_CURR_LED3_SHIFT 0
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#define AFE4404_OFFDAC_CURR_ALED1_MASK GENMASK(14, 10)
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#define AFE4404_OFFDAC_CURR_ALED1_SHIFT 10
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#define AFE4404_OFFDAC_CURR_ALED2_MASK GENMASK(4, 0)
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#define AFE4404_OFFDAC_CURR_ALED2_SHIFT 0
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/* AFE4404 NULL fields */
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#define NULL_MASK 0
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#define NULL_SHIFT 0
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/* AFE4404 TIA_GAIN_CAP values */
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#define AFE4404_TIA_GAIN_CAP_5_P 0x0
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#define AFE4404_TIA_GAIN_CAP_2_5_P 0x1
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#define AFE4404_TIA_GAIN_CAP_10_P 0x2
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#define AFE4404_TIA_GAIN_CAP_7_5_P 0x3
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#define AFE4404_TIA_GAIN_CAP_20_P 0x4
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#define AFE4404_TIA_GAIN_CAP_17_5_P 0x5
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#define AFE4404_TIA_GAIN_CAP_25_P 0x6
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#define AFE4404_TIA_GAIN_CAP_22_5_P 0x7
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/* AFE4404 TIA_GAIN_RES values */
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#define AFE4404_TIA_GAIN_RES_500_K 0x0
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#define AFE4404_TIA_GAIN_RES_250_K 0x1
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#define AFE4404_TIA_GAIN_RES_100_K 0x2
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#define AFE4404_TIA_GAIN_RES_50_K 0x3
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#define AFE4404_TIA_GAIN_RES_25_K 0x4
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#define AFE4404_TIA_GAIN_RES_10_K 0x5
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#define AFE4404_TIA_GAIN_RES_1_M 0x6
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#define AFE4404_TIA_GAIN_RES_2_M 0x7
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/**
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* struct afe4404_data - AFE4404 device instance data
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* @dev: Device structure
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* @regmap: Register map of the device
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* @regulator: Pointer to the regulator for the IC
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* @trig: IIO trigger for this device
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* @irq: ADC_RDY line interrupt number
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*/
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struct afe4404_data {
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struct device *dev;
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struct regmap *regmap;
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struct regulator *regulator;
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struct iio_trigger *trig;
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int irq;
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};
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enum afe4404_chan_id {
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LED1,
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ALED1,
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LED2,
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ALED2,
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LED3,
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LED1_ALED1,
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LED2_ALED2,
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ILED1,
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ILED2,
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ILED3,
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};
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static const struct afe440x_reg_info afe4404_reg_info[] = {
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[LED1] = AFE440X_REG_INFO(AFE440X_LED1VAL, AFE4404_OFFDAC, AFE4404_OFFDAC_CURR_LED1),
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[ALED1] = AFE440X_REG_INFO(AFE440X_ALED1VAL, AFE4404_OFFDAC, AFE4404_OFFDAC_CURR_ALED1),
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[LED2] = AFE440X_REG_INFO(AFE440X_LED2VAL, AFE4404_OFFDAC, AFE4404_OFFDAC_CURR_LED2),
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[ALED2] = AFE440X_REG_INFO(AFE440X_ALED2VAL, AFE4404_OFFDAC, AFE4404_OFFDAC_CURR_ALED2),
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[LED3] = AFE440X_REG_INFO(AFE440X_ALED2VAL, 0, NULL),
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[LED1_ALED1] = AFE440X_REG_INFO(AFE440X_LED1_ALED1VAL, 0, NULL),
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[LED2_ALED2] = AFE440X_REG_INFO(AFE440X_LED2_ALED2VAL, 0, NULL),
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[ILED1] = AFE440X_REG_INFO(AFE440X_LEDCNTRL, 0, AFE4404_LEDCNTRL_ILED1),
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[ILED2] = AFE440X_REG_INFO(AFE440X_LEDCNTRL, 0, AFE4404_LEDCNTRL_ILED2),
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[ILED3] = AFE440X_REG_INFO(AFE440X_LEDCNTRL, 0, AFE4404_LEDCNTRL_ILED3),
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};
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static const struct iio_chan_spec afe4404_channels[] = {
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/* ADC values */
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AFE440X_INTENSITY_CHAN(LED1, "led1", BIT(IIO_CHAN_INFO_OFFSET)),
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AFE440X_INTENSITY_CHAN(ALED1, "led1_ambient", BIT(IIO_CHAN_INFO_OFFSET)),
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AFE440X_INTENSITY_CHAN(LED2, "led2", BIT(IIO_CHAN_INFO_OFFSET)),
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AFE440X_INTENSITY_CHAN(ALED2, "led2_ambient", BIT(IIO_CHAN_INFO_OFFSET)),
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AFE440X_INTENSITY_CHAN(LED3, "led3", BIT(IIO_CHAN_INFO_OFFSET)),
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AFE440X_INTENSITY_CHAN(LED1_ALED1, "led1-led1_ambient", 0),
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AFE440X_INTENSITY_CHAN(LED2_ALED2, "led2-led2_ambient", 0),
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/* LED current */
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AFE440X_CURRENT_CHAN(ILED1, "led1"),
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AFE440X_CURRENT_CHAN(ILED2, "led2"),
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AFE440X_CURRENT_CHAN(ILED3, "led3"),
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};
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static const struct afe440x_val_table afe4404_res_table[] = {
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{ .integer = 500000, .fract = 0 },
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{ .integer = 250000, .fract = 0 },
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{ .integer = 100000, .fract = 0 },
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{ .integer = 50000, .fract = 0 },
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{ .integer = 25000, .fract = 0 },
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{ .integer = 10000, .fract = 0 },
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{ .integer = 1000000, .fract = 0 },
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{ .integer = 2000000, .fract = 0 },
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};
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AFE440X_TABLE_ATTR(tia_resistance_available, afe4404_res_table);
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static const struct afe440x_val_table afe4404_cap_table[] = {
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{ .integer = 0, .fract = 5000 },
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{ .integer = 0, .fract = 2500 },
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{ .integer = 0, .fract = 10000 },
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{ .integer = 0, .fract = 7500 },
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{ .integer = 0, .fract = 20000 },
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{ .integer = 0, .fract = 17500 },
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{ .integer = 0, .fract = 25000 },
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{ .integer = 0, .fract = 22500 },
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};
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AFE440X_TABLE_ATTR(tia_capacitance_available, afe4404_cap_table);
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static ssize_t afe440x_show_register(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct afe4404_data *afe = iio_priv(indio_dev);
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struct afe440x_attr *afe440x_attr = to_afe440x_attr(attr);
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unsigned int reg_val, type;
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int vals[2];
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int ret, val_len;
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ret = regmap_read(afe->regmap, afe440x_attr->reg, ®_val);
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if (ret)
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return ret;
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reg_val &= afe440x_attr->mask;
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reg_val >>= afe440x_attr->shift;
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switch (afe440x_attr->type) {
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case SIMPLE:
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type = IIO_VAL_INT;
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val_len = 1;
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vals[0] = reg_val;
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break;
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case RESISTANCE:
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case CAPACITANCE:
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type = IIO_VAL_INT_PLUS_MICRO;
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val_len = 2;
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if (reg_val < afe440x_attr->table_size) {
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vals[0] = afe440x_attr->val_table[reg_val].integer;
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vals[1] = afe440x_attr->val_table[reg_val].fract;
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break;
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}
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return -EINVAL;
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default:
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return -EINVAL;
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}
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return iio_format_value(buf, type, val_len, vals);
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}
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static ssize_t afe440x_store_register(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct afe4404_data *afe = iio_priv(indio_dev);
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struct afe440x_attr *afe440x_attr = to_afe440x_attr(attr);
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int val, integer, fract, ret;
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ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract);
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if (ret)
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return ret;
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switch (afe440x_attr->type) {
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case SIMPLE:
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val = integer;
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break;
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case RESISTANCE:
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case CAPACITANCE:
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for (val = 0; val < afe440x_attr->table_size; val++)
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if (afe440x_attr->val_table[val].integer == integer &&
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afe440x_attr->val_table[val].fract == fract)
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break;
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if (val == afe440x_attr->table_size)
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return -EINVAL;
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break;
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default:
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return -EINVAL;
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}
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ret = regmap_update_bits(afe->regmap, afe440x_attr->reg,
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afe440x_attr->mask,
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(val << afe440x_attr->shift));
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if (ret)
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return ret;
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return count;
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}
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static AFE440X_ATTR(tia_separate_en, AFE4404_TIA_GAIN_SEP, AFE440X_TIAGAIN_ENSEPGAIN, SIMPLE, NULL, 0);
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static AFE440X_ATTR(tia_resistance1, AFE4404_TIA_GAIN, AFE4404_TIA_GAIN_RES, RESISTANCE, afe4404_res_table, ARRAY_SIZE(afe4404_res_table));
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static AFE440X_ATTR(tia_capacitance1, AFE4404_TIA_GAIN, AFE4404_TIA_GAIN_CAP, CAPACITANCE, afe4404_cap_table, ARRAY_SIZE(afe4404_cap_table));
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static AFE440X_ATTR(tia_resistance2, AFE4404_TIA_GAIN_SEP, AFE4404_TIA_GAIN_RES, RESISTANCE, afe4404_res_table, ARRAY_SIZE(afe4404_res_table));
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static AFE440X_ATTR(tia_capacitance2, AFE4404_TIA_GAIN_SEP, AFE4404_TIA_GAIN_CAP, CAPACITANCE, afe4404_cap_table, ARRAY_SIZE(afe4404_cap_table));
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static struct attribute *afe440x_attributes[] = {
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&afe440x_attr_tia_separate_en.dev_attr.attr,
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&afe440x_attr_tia_resistance1.dev_attr.attr,
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&afe440x_attr_tia_capacitance1.dev_attr.attr,
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&afe440x_attr_tia_resistance2.dev_attr.attr,
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&afe440x_attr_tia_capacitance2.dev_attr.attr,
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&dev_attr_tia_resistance_available.attr,
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&dev_attr_tia_capacitance_available.attr,
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NULL
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};
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static const struct attribute_group afe440x_attribute_group = {
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.attrs = afe440x_attributes
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};
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static int afe4404_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2, long mask)
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{
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struct afe4404_data *afe = iio_priv(indio_dev);
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const struct afe440x_reg_info reg_info = afe4404_reg_info[chan->address];
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int ret;
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switch (chan->type) {
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case IIO_INTENSITY:
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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ret = regmap_read(afe->regmap, reg_info.reg, val);
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if (ret)
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return ret;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_OFFSET:
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ret = regmap_read(afe->regmap, reg_info.offreg,
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val);
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if (ret)
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return ret;
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*val &= reg_info.mask;
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*val >>= reg_info.shift;
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return IIO_VAL_INT;
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}
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break;
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case IIO_CURRENT:
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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ret = regmap_read(afe->regmap, reg_info.reg, val);
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if (ret)
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return ret;
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*val &= reg_info.mask;
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*val >>= reg_info.shift;
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return IIO_VAL_INT;
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case IIO_CHAN_INFO_SCALE:
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*val = 0;
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*val2 = 800000;
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return IIO_VAL_INT_PLUS_MICRO;
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}
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break;
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default:
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break;
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}
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return -EINVAL;
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}
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static int afe4404_write_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int val, int val2, long mask)
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{
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struct afe4404_data *afe = iio_priv(indio_dev);
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const struct afe440x_reg_info reg_info = afe4404_reg_info[chan->address];
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switch (chan->type) {
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case IIO_INTENSITY:
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switch (mask) {
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case IIO_CHAN_INFO_OFFSET:
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return regmap_update_bits(afe->regmap,
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reg_info.offreg,
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reg_info.mask,
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(val << reg_info.shift));
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}
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break;
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case IIO_CURRENT:
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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return regmap_update_bits(afe->regmap,
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reg_info.reg,
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reg_info.mask,
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(val << reg_info.shift));
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}
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break;
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default:
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break;
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}
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return -EINVAL;
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}
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static const struct iio_info afe4404_iio_info = {
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.attrs = &afe440x_attribute_group,
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.read_raw = afe4404_read_raw,
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.write_raw = afe4404_write_raw,
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.driver_module = THIS_MODULE,
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};
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static irqreturn_t afe4404_trigger_handler(int irq, void *private)
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{
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struct iio_poll_func *pf = private;
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struct iio_dev *indio_dev = pf->indio_dev;
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struct afe4404_data *afe = iio_priv(indio_dev);
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int ret, bit, i = 0;
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s32 buffer[10];
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for_each_set_bit(bit, indio_dev->active_scan_mask,
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indio_dev->masklength) {
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ret = regmap_read(afe->regmap, afe4404_reg_info[bit].reg,
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&buffer[i++]);
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if (ret)
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goto err;
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}
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iio_push_to_buffers_with_timestamp(indio_dev, buffer, pf->timestamp);
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err:
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iio_trigger_notify_done(indio_dev->trig);
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return IRQ_HANDLED;
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}
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static const struct iio_trigger_ops afe4404_trigger_ops = {
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.owner = THIS_MODULE,
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};
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/* Default timings from data-sheet */
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#define AFE4404_TIMING_PAIRS \
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{ AFE440X_PRPCOUNT, 39999 }, \
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{ AFE440X_LED2LEDSTC, 0 }, \
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{ AFE440X_LED2LEDENDC, 398 }, \
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{ AFE440X_LED2STC, 80 }, \
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{ AFE440X_LED2ENDC, 398 }, \
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{ AFE440X_ADCRSTSTCT0, 5600 }, \
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{ AFE440X_ADCRSTENDCT0, 5606 }, \
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{ AFE440X_LED2CONVST, 5607 }, \
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{ 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,
|
|
};
|
|
|
|
static const struct of_device_id afe4404_of_match[] = {
|
|
{ .compatible = "ti,afe4404", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, afe4404_of_match);
|
|
|
|
static int __maybe_unused 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 __maybe_unused 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");
|
|
goto disable_reg;
|
|
}
|
|
|
|
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");
|
|
goto disable_reg;
|
|
}
|
|
|
|
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");
|
|
ret = -ENOMEM;
|
|
goto disable_reg;
|
|
}
|
|
|
|
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");
|
|
goto disable_reg;
|
|
}
|
|
|
|
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");
|
|
goto disable_reg;
|
|
}
|
|
}
|
|
|
|
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");
|
|
goto unregister_trigger;
|
|
}
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret) {
|
|
dev_err(afe->dev, "Unable to register IIO device\n");
|
|
goto unregister_triggered_buffer;
|
|
}
|
|
|
|
return 0;
|
|
|
|
unregister_triggered_buffer:
|
|
iio_triggered_buffer_cleanup(indio_dev);
|
|
unregister_trigger:
|
|
if (afe->irq > 0)
|
|
iio_trigger_unregister(afe->trig);
|
|
disable_reg:
|
|
regulator_disable(afe->regulator);
|
|
|
|
return ret;
|
|
}
|
|
|
|
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 = 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 <afd@ti.com>");
|
|
MODULE_DESCRIPTION("TI AFE4404 Heart Rate Monitor and Pulse Oximeter AFE");
|
|
MODULE_LICENSE("GPL v2");
|