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![Gwendal Grignou](/assets/img/avatar_default.png)
Use cocci semantic patch: @@ expression trigger, P; @@ trigger = devm_iio_trigger_alloc(P, ...); ... - trigger->dev.parent = P; To remove trigger->dev.parent, since it is set by default. Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20210309193620.2176163-3-gwendal@chromium.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
1144 lines
27 KiB
C
1144 lines
27 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* RPR-0521 ROHM Ambient Light and Proximity Sensor
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*
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* Copyright (c) 2015, Intel Corporation.
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*
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* IIO driver for RPR-0521RS (7-bit I2C slave address 0x38).
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*
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* TODO: illuminance channel
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/regmap.h>
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#include <linux/delay.h>
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#include <linux/acpi.h>
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#include <linux/iio/iio.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/trigger_consumer.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/iio/sysfs.h>
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#include <linux/pm_runtime.h>
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#define RPR0521_REG_SYSTEM_CTRL 0x40
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#define RPR0521_REG_MODE_CTRL 0x41
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#define RPR0521_REG_ALS_CTRL 0x42
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#define RPR0521_REG_PXS_CTRL 0x43
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#define RPR0521_REG_PXS_DATA 0x44 /* 16-bit, little endian */
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#define RPR0521_REG_ALS_DATA0 0x46 /* 16-bit, little endian */
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#define RPR0521_REG_ALS_DATA1 0x48 /* 16-bit, little endian */
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#define RPR0521_REG_INTERRUPT 0x4A
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#define RPR0521_REG_PS_OFFSET_LSB 0x53
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#define RPR0521_REG_ID 0x92
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#define RPR0521_MODE_ALS_MASK BIT(7)
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#define RPR0521_MODE_PXS_MASK BIT(6)
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#define RPR0521_MODE_MEAS_TIME_MASK GENMASK(3, 0)
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#define RPR0521_ALS_DATA0_GAIN_MASK GENMASK(5, 4)
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#define RPR0521_ALS_DATA0_GAIN_SHIFT 4
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#define RPR0521_ALS_DATA1_GAIN_MASK GENMASK(3, 2)
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#define RPR0521_ALS_DATA1_GAIN_SHIFT 2
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#define RPR0521_PXS_GAIN_MASK GENMASK(5, 4)
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#define RPR0521_PXS_GAIN_SHIFT 4
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#define RPR0521_PXS_PERSISTENCE_MASK GENMASK(3, 0)
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#define RPR0521_INTERRUPT_INT_TRIG_PS_MASK BIT(0)
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#define RPR0521_INTERRUPT_INT_TRIG_ALS_MASK BIT(1)
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#define RPR0521_INTERRUPT_INT_REASSERT_MASK BIT(3)
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#define RPR0521_INTERRUPT_ALS_INT_STATUS_MASK BIT(6)
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#define RPR0521_INTERRUPT_PS_INT_STATUS_MASK BIT(7)
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#define RPR0521_MODE_ALS_ENABLE BIT(7)
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#define RPR0521_MODE_ALS_DISABLE 0x00
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#define RPR0521_MODE_PXS_ENABLE BIT(6)
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#define RPR0521_MODE_PXS_DISABLE 0x00
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#define RPR0521_PXS_PERSISTENCE_DRDY 0x00
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#define RPR0521_INTERRUPT_INT_TRIG_PS_ENABLE BIT(0)
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#define RPR0521_INTERRUPT_INT_TRIG_PS_DISABLE 0x00
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#define RPR0521_INTERRUPT_INT_TRIG_ALS_ENABLE BIT(1)
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#define RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE 0x00
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#define RPR0521_INTERRUPT_INT_REASSERT_ENABLE BIT(3)
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#define RPR0521_INTERRUPT_INT_REASSERT_DISABLE 0x00
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#define RPR0521_MANUFACT_ID 0xE0
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#define RPR0521_DEFAULT_MEAS_TIME 0x06 /* ALS - 100ms, PXS - 100ms */
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#define RPR0521_DRV_NAME "RPR0521"
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#define RPR0521_IRQ_NAME "rpr0521_event"
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#define RPR0521_REGMAP_NAME "rpr0521_regmap"
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#define RPR0521_SLEEP_DELAY_MS 2000
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#define RPR0521_ALS_SCALE_AVAIL "0.007812 0.015625 0.5 1"
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#define RPR0521_PXS_SCALE_AVAIL "0.125 0.5 1"
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struct rpr0521_gain {
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int scale;
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int uscale;
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};
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static const struct rpr0521_gain rpr0521_als_gain[4] = {
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{1, 0}, /* x1 */
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{0, 500000}, /* x2 */
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{0, 15625}, /* x64 */
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{0, 7812}, /* x128 */
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};
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static const struct rpr0521_gain rpr0521_pxs_gain[3] = {
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{1, 0}, /* x1 */
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{0, 500000}, /* x2 */
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{0, 125000}, /* x4 */
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};
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enum rpr0521_channel {
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RPR0521_CHAN_PXS,
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RPR0521_CHAN_ALS_DATA0,
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RPR0521_CHAN_ALS_DATA1,
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};
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struct rpr0521_reg_desc {
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u8 address;
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u8 device_mask;
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};
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static const struct rpr0521_reg_desc rpr0521_data_reg[] = {
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[RPR0521_CHAN_PXS] = {
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.address = RPR0521_REG_PXS_DATA,
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.device_mask = RPR0521_MODE_PXS_MASK,
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},
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[RPR0521_CHAN_ALS_DATA0] = {
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.address = RPR0521_REG_ALS_DATA0,
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.device_mask = RPR0521_MODE_ALS_MASK,
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},
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[RPR0521_CHAN_ALS_DATA1] = {
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.address = RPR0521_REG_ALS_DATA1,
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.device_mask = RPR0521_MODE_ALS_MASK,
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},
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};
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static const struct rpr0521_gain_info {
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u8 reg;
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u8 mask;
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u8 shift;
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const struct rpr0521_gain *gain;
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int size;
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} rpr0521_gain[] = {
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[RPR0521_CHAN_PXS] = {
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.reg = RPR0521_REG_PXS_CTRL,
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.mask = RPR0521_PXS_GAIN_MASK,
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.shift = RPR0521_PXS_GAIN_SHIFT,
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.gain = rpr0521_pxs_gain,
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.size = ARRAY_SIZE(rpr0521_pxs_gain),
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},
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[RPR0521_CHAN_ALS_DATA0] = {
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.reg = RPR0521_REG_ALS_CTRL,
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.mask = RPR0521_ALS_DATA0_GAIN_MASK,
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.shift = RPR0521_ALS_DATA0_GAIN_SHIFT,
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.gain = rpr0521_als_gain,
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.size = ARRAY_SIZE(rpr0521_als_gain),
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},
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[RPR0521_CHAN_ALS_DATA1] = {
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.reg = RPR0521_REG_ALS_CTRL,
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.mask = RPR0521_ALS_DATA1_GAIN_MASK,
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.shift = RPR0521_ALS_DATA1_GAIN_SHIFT,
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.gain = rpr0521_als_gain,
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.size = ARRAY_SIZE(rpr0521_als_gain),
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},
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};
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struct rpr0521_samp_freq {
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int als_hz;
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int als_uhz;
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int pxs_hz;
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int pxs_uhz;
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};
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static const struct rpr0521_samp_freq rpr0521_samp_freq_i[13] = {
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/* {ALS, PXS}, W==currently writable option */
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{0, 0, 0, 0}, /* W0000, 0=standby */
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{0, 0, 100, 0}, /* 0001 */
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{0, 0, 25, 0}, /* 0010 */
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{0, 0, 10, 0}, /* 0011 */
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{0, 0, 2, 500000}, /* 0100 */
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{10, 0, 20, 0}, /* 0101 */
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{10, 0, 10, 0}, /* W0110 */
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{10, 0, 2, 500000}, /* 0111 */
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{2, 500000, 20, 0}, /* 1000, measurement 100ms, sleep 300ms */
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{2, 500000, 10, 0}, /* 1001, measurement 100ms, sleep 300ms */
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{2, 500000, 0, 0}, /* 1010, high sensitivity mode */
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{2, 500000, 2, 500000}, /* W1011, high sensitivity mode */
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{20, 0, 20, 0} /* 1100, ALS_data x 0.5, see specification P.18 */
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};
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struct rpr0521_data {
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struct i2c_client *client;
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/* protect device params updates (e.g state, gain) */
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struct mutex lock;
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/* device active status */
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bool als_dev_en;
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bool pxs_dev_en;
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struct iio_trigger *drdy_trigger0;
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s64 irq_timestamp;
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/* optimize runtime pm ops - enable/disable device only if needed */
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bool als_ps_need_en;
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bool pxs_ps_need_en;
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bool als_need_dis;
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bool pxs_need_dis;
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struct regmap *regmap;
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/*
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* Ensure correct naturally aligned timestamp.
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* Note that the read will put garbage data into
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* the padding but this should not be a problem
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*/
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struct {
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__le16 channels[3];
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u8 garbage;
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s64 ts __aligned(8);
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} scan;
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};
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static IIO_CONST_ATTR(in_intensity_scale_available, RPR0521_ALS_SCALE_AVAIL);
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static IIO_CONST_ATTR(in_proximity_scale_available, RPR0521_PXS_SCALE_AVAIL);
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/*
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* Start with easy freq first, whole table of freq combinations is more
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* complicated.
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*/
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static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("2.5 10");
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static struct attribute *rpr0521_attributes[] = {
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&iio_const_attr_in_intensity_scale_available.dev_attr.attr,
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&iio_const_attr_in_proximity_scale_available.dev_attr.attr,
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&iio_const_attr_sampling_frequency_available.dev_attr.attr,
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NULL,
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};
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static const struct attribute_group rpr0521_attribute_group = {
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.attrs = rpr0521_attributes,
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};
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/* Order of the channel data in buffer */
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enum rpr0521_scan_index_order {
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RPR0521_CHAN_INDEX_PXS,
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RPR0521_CHAN_INDEX_BOTH,
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RPR0521_CHAN_INDEX_IR,
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};
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static const unsigned long rpr0521_available_scan_masks[] = {
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BIT(RPR0521_CHAN_INDEX_PXS) | BIT(RPR0521_CHAN_INDEX_BOTH) |
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BIT(RPR0521_CHAN_INDEX_IR),
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0
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};
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static const struct iio_chan_spec rpr0521_channels[] = {
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{
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.type = IIO_PROXIMITY,
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.address = RPR0521_CHAN_PXS,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_OFFSET) |
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BIT(IIO_CHAN_INFO_SCALE),
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
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.scan_index = RPR0521_CHAN_INDEX_PXS,
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.scan_type = {
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.sign = 'u',
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.realbits = 16,
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.storagebits = 16,
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.endianness = IIO_LE,
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},
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},
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{
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.type = IIO_INTENSITY,
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.modified = 1,
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.address = RPR0521_CHAN_ALS_DATA0,
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.channel2 = IIO_MOD_LIGHT_BOTH,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_SCALE),
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
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.scan_index = RPR0521_CHAN_INDEX_BOTH,
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.scan_type = {
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.sign = 'u',
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.realbits = 16,
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.storagebits = 16,
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.endianness = IIO_LE,
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},
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},
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{
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.type = IIO_INTENSITY,
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.modified = 1,
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.address = RPR0521_CHAN_ALS_DATA1,
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.channel2 = IIO_MOD_LIGHT_IR,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
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BIT(IIO_CHAN_INFO_SCALE),
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
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.scan_index = RPR0521_CHAN_INDEX_IR,
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.scan_type = {
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.sign = 'u',
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.realbits = 16,
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.storagebits = 16,
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.endianness = IIO_LE,
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},
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},
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};
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static int rpr0521_als_enable(struct rpr0521_data *data, u8 status)
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{
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int ret;
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ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
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RPR0521_MODE_ALS_MASK,
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status);
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if (ret < 0)
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return ret;
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if (status & RPR0521_MODE_ALS_MASK)
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data->als_dev_en = true;
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else
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data->als_dev_en = false;
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return 0;
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}
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static int rpr0521_pxs_enable(struct rpr0521_data *data, u8 status)
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{
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int ret;
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ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
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RPR0521_MODE_PXS_MASK,
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status);
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if (ret < 0)
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return ret;
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if (status & RPR0521_MODE_PXS_MASK)
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data->pxs_dev_en = true;
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else
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data->pxs_dev_en = false;
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return 0;
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}
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/**
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* rpr0521_set_power_state - handles runtime PM state and sensors enabled status
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*
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* @data: rpr0521 device private data
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* @on: state to be set for devices in @device_mask
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* @device_mask: bitmask specifying for which device we need to update @on state
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*
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* Calls for this function must be balanced so that each ON should have matching
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* OFF. Otherwise pm usage_count gets out of sync.
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*/
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static int rpr0521_set_power_state(struct rpr0521_data *data, bool on,
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u8 device_mask)
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{
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#ifdef CONFIG_PM
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int ret;
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if (device_mask & RPR0521_MODE_ALS_MASK) {
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data->als_ps_need_en = on;
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data->als_need_dis = !on;
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}
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if (device_mask & RPR0521_MODE_PXS_MASK) {
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data->pxs_ps_need_en = on;
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data->pxs_need_dis = !on;
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}
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/*
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* On: _resume() is called only when we are suspended
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* Off: _suspend() is called after delay if _resume() is not
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* called before that.
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* Note: If either measurement is re-enabled before _suspend(),
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* both stay enabled until _suspend().
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*/
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if (on) {
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ret = pm_runtime_get_sync(&data->client->dev);
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} else {
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pm_runtime_mark_last_busy(&data->client->dev);
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ret = pm_runtime_put_autosuspend(&data->client->dev);
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}
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if (ret < 0) {
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dev_err(&data->client->dev,
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"Failed: rpr0521_set_power_state for %d, ret %d\n",
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on, ret);
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if (on)
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pm_runtime_put_noidle(&data->client->dev);
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return ret;
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}
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if (on) {
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/* If _resume() was not called, enable measurement now. */
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if (data->als_ps_need_en) {
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ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
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if (ret)
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return ret;
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data->als_ps_need_en = false;
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}
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if (data->pxs_ps_need_en) {
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ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
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if (ret)
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return ret;
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data->pxs_ps_need_en = false;
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}
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}
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#endif
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return 0;
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}
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/* Interrupt register tells if this sensor caused the interrupt or not. */
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static inline bool rpr0521_is_triggered(struct rpr0521_data *data)
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{
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int ret;
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int reg;
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ret = regmap_read(data->regmap, RPR0521_REG_INTERRUPT, ®);
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if (ret < 0)
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return false; /* Reg read failed. */
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if (reg &
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(RPR0521_INTERRUPT_ALS_INT_STATUS_MASK |
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RPR0521_INTERRUPT_PS_INT_STATUS_MASK))
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return true;
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else
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return false; /* Int not from this sensor. */
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}
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/* IRQ to trigger handler */
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static irqreturn_t rpr0521_drdy_irq_handler(int irq, void *private)
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{
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struct iio_dev *indio_dev = private;
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struct rpr0521_data *data = iio_priv(indio_dev);
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data->irq_timestamp = iio_get_time_ns(indio_dev);
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/*
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* We need to wake the thread to read the interrupt reg. It
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* is not possible to do that here because regmap_read takes a
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* mutex.
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*/
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return IRQ_WAKE_THREAD;
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}
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static irqreturn_t rpr0521_drdy_irq_thread(int irq, void *private)
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{
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struct iio_dev *indio_dev = private;
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struct rpr0521_data *data = iio_priv(indio_dev);
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if (rpr0521_is_triggered(data)) {
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iio_trigger_poll_chained(data->drdy_trigger0);
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return IRQ_HANDLED;
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}
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return IRQ_NONE;
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}
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static irqreturn_t rpr0521_trigger_consumer_store_time(int irq, void *p)
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{
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struct iio_poll_func *pf = p;
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struct iio_dev *indio_dev = pf->indio_dev;
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/* Other trigger polls store time here. */
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if (!iio_trigger_using_own(indio_dev))
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pf->timestamp = iio_get_time_ns(indio_dev);
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return IRQ_WAKE_THREAD;
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}
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|
|
static irqreturn_t rpr0521_trigger_consumer_handler(int irq, void *p)
|
|
{
|
|
struct iio_poll_func *pf = p;
|
|
struct iio_dev *indio_dev = pf->indio_dev;
|
|
struct rpr0521_data *data = iio_priv(indio_dev);
|
|
int err;
|
|
|
|
/* Use irq timestamp when reasonable. */
|
|
if (iio_trigger_using_own(indio_dev) && data->irq_timestamp) {
|
|
pf->timestamp = data->irq_timestamp;
|
|
data->irq_timestamp = 0;
|
|
}
|
|
/* Other chained trigger polls get timestamp only here. */
|
|
if (!pf->timestamp)
|
|
pf->timestamp = iio_get_time_ns(indio_dev);
|
|
|
|
err = regmap_bulk_read(data->regmap, RPR0521_REG_PXS_DATA,
|
|
data->scan.channels,
|
|
(3 * 2) + 1); /* 3 * 16-bit + (discarded) int clear reg. */
|
|
if (!err)
|
|
iio_push_to_buffers_with_timestamp(indio_dev,
|
|
&data->scan, pf->timestamp);
|
|
else
|
|
dev_err(&data->client->dev,
|
|
"Trigger consumer can't read from sensor.\n");
|
|
pf->timestamp = 0;
|
|
|
|
iio_trigger_notify_done(indio_dev->trig);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int rpr0521_write_int_enable(struct rpr0521_data *data)
|
|
{
|
|
int err;
|
|
|
|
/* Interrupt after each measurement */
|
|
err = regmap_update_bits(data->regmap, RPR0521_REG_PXS_CTRL,
|
|
RPR0521_PXS_PERSISTENCE_MASK,
|
|
RPR0521_PXS_PERSISTENCE_DRDY);
|
|
if (err) {
|
|
dev_err(&data->client->dev, "PS control reg write fail.\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Ignore latch and mode because of drdy */
|
|
err = regmap_write(data->regmap, RPR0521_REG_INTERRUPT,
|
|
RPR0521_INTERRUPT_INT_REASSERT_DISABLE |
|
|
RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE |
|
|
RPR0521_INTERRUPT_INT_TRIG_PS_ENABLE
|
|
);
|
|
if (err) {
|
|
dev_err(&data->client->dev, "Interrupt setup write fail.\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rpr0521_write_int_disable(struct rpr0521_data *data)
|
|
{
|
|
/* Don't care of clearing mode, assert and latch. */
|
|
return regmap_write(data->regmap, RPR0521_REG_INTERRUPT,
|
|
RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE |
|
|
RPR0521_INTERRUPT_INT_TRIG_PS_DISABLE
|
|
);
|
|
}
|
|
|
|
/*
|
|
* Trigger producer enable / disable. Note that there will be trigs only when
|
|
* measurement data is ready to be read.
|
|
*/
|
|
static int rpr0521_pxs_drdy_set_state(struct iio_trigger *trigger,
|
|
bool enable_drdy)
|
|
{
|
|
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger);
|
|
struct rpr0521_data *data = iio_priv(indio_dev);
|
|
int err;
|
|
|
|
if (enable_drdy)
|
|
err = rpr0521_write_int_enable(data);
|
|
else
|
|
err = rpr0521_write_int_disable(data);
|
|
if (err)
|
|
dev_err(&data->client->dev, "rpr0521_pxs_drdy_set_state failed\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct iio_trigger_ops rpr0521_trigger_ops = {
|
|
.set_trigger_state = rpr0521_pxs_drdy_set_state,
|
|
};
|
|
|
|
|
|
static int rpr0521_buffer_preenable(struct iio_dev *indio_dev)
|
|
{
|
|
int err;
|
|
struct rpr0521_data *data = iio_priv(indio_dev);
|
|
|
|
mutex_lock(&data->lock);
|
|
err = rpr0521_set_power_state(data, true,
|
|
(RPR0521_MODE_PXS_MASK | RPR0521_MODE_ALS_MASK));
|
|
mutex_unlock(&data->lock);
|
|
if (err)
|
|
dev_err(&data->client->dev, "_buffer_preenable fail\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
static int rpr0521_buffer_postdisable(struct iio_dev *indio_dev)
|
|
{
|
|
int err;
|
|
struct rpr0521_data *data = iio_priv(indio_dev);
|
|
|
|
mutex_lock(&data->lock);
|
|
err = rpr0521_set_power_state(data, false,
|
|
(RPR0521_MODE_PXS_MASK | RPR0521_MODE_ALS_MASK));
|
|
mutex_unlock(&data->lock);
|
|
if (err)
|
|
dev_err(&data->client->dev, "_buffer_postdisable fail\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct iio_buffer_setup_ops rpr0521_buffer_setup_ops = {
|
|
.preenable = rpr0521_buffer_preenable,
|
|
.postdisable = rpr0521_buffer_postdisable,
|
|
};
|
|
|
|
static int rpr0521_get_gain(struct rpr0521_data *data, int chan,
|
|
int *val, int *val2)
|
|
{
|
|
int ret, reg, idx;
|
|
|
|
ret = regmap_read(data->regmap, rpr0521_gain[chan].reg, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
idx = (rpr0521_gain[chan].mask & reg) >> rpr0521_gain[chan].shift;
|
|
*val = rpr0521_gain[chan].gain[idx].scale;
|
|
*val2 = rpr0521_gain[chan].gain[idx].uscale;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rpr0521_set_gain(struct rpr0521_data *data, int chan,
|
|
int val, int val2)
|
|
{
|
|
int i, idx = -EINVAL;
|
|
|
|
/* get gain index */
|
|
for (i = 0; i < rpr0521_gain[chan].size; i++)
|
|
if (val == rpr0521_gain[chan].gain[i].scale &&
|
|
val2 == rpr0521_gain[chan].gain[i].uscale) {
|
|
idx = i;
|
|
break;
|
|
}
|
|
|
|
if (idx < 0)
|
|
return idx;
|
|
|
|
return regmap_update_bits(data->regmap, rpr0521_gain[chan].reg,
|
|
rpr0521_gain[chan].mask,
|
|
idx << rpr0521_gain[chan].shift);
|
|
}
|
|
|
|
static int rpr0521_read_samp_freq(struct rpr0521_data *data,
|
|
enum iio_chan_type chan_type,
|
|
int *val, int *val2)
|
|
{
|
|
int reg, ret;
|
|
|
|
ret = regmap_read(data->regmap, RPR0521_REG_MODE_CTRL, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
reg &= RPR0521_MODE_MEAS_TIME_MASK;
|
|
if (reg >= ARRAY_SIZE(rpr0521_samp_freq_i))
|
|
return -EINVAL;
|
|
|
|
switch (chan_type) {
|
|
case IIO_INTENSITY:
|
|
*val = rpr0521_samp_freq_i[reg].als_hz;
|
|
*val2 = rpr0521_samp_freq_i[reg].als_uhz;
|
|
return 0;
|
|
|
|
case IIO_PROXIMITY:
|
|
*val = rpr0521_samp_freq_i[reg].pxs_hz;
|
|
*val2 = rpr0521_samp_freq_i[reg].pxs_uhz;
|
|
return 0;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int rpr0521_write_samp_freq_common(struct rpr0521_data *data,
|
|
enum iio_chan_type chan_type,
|
|
int val, int val2)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* Ignore channel
|
|
* both pxs and als are setup only to same freq because of simplicity
|
|
*/
|
|
switch (val) {
|
|
case 0:
|
|
i = 0;
|
|
break;
|
|
|
|
case 2:
|
|
if (val2 != 500000)
|
|
return -EINVAL;
|
|
|
|
i = 11;
|
|
break;
|
|
|
|
case 10:
|
|
i = 6;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return regmap_update_bits(data->regmap,
|
|
RPR0521_REG_MODE_CTRL,
|
|
RPR0521_MODE_MEAS_TIME_MASK,
|
|
i);
|
|
}
|
|
|
|
static int rpr0521_read_ps_offset(struct rpr0521_data *data, int *offset)
|
|
{
|
|
int ret;
|
|
__le16 buffer;
|
|
|
|
ret = regmap_bulk_read(data->regmap,
|
|
RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer));
|
|
|
|
if (ret < 0) {
|
|
dev_err(&data->client->dev, "Failed to read PS OFFSET register\n");
|
|
return ret;
|
|
}
|
|
*offset = le16_to_cpu(buffer);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rpr0521_write_ps_offset(struct rpr0521_data *data, int offset)
|
|
{
|
|
int ret;
|
|
__le16 buffer;
|
|
|
|
buffer = cpu_to_le16(offset & 0x3ff);
|
|
ret = regmap_raw_write(data->regmap,
|
|
RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer));
|
|
|
|
if (ret < 0) {
|
|
dev_err(&data->client->dev, "Failed to write PS OFFSET register\n");
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rpr0521_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, int *val,
|
|
int *val2, long mask)
|
|
{
|
|
struct rpr0521_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
int busy;
|
|
u8 device_mask;
|
|
__le16 raw_data;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
if (chan->type != IIO_INTENSITY && chan->type != IIO_PROXIMITY)
|
|
return -EINVAL;
|
|
|
|
busy = iio_device_claim_direct_mode(indio_dev);
|
|
if (busy)
|
|
return -EBUSY;
|
|
|
|
device_mask = rpr0521_data_reg[chan->address].device_mask;
|
|
|
|
mutex_lock(&data->lock);
|
|
ret = rpr0521_set_power_state(data, true, device_mask);
|
|
if (ret < 0)
|
|
goto rpr0521_read_raw_out;
|
|
|
|
ret = regmap_bulk_read(data->regmap,
|
|
rpr0521_data_reg[chan->address].address,
|
|
&raw_data, sizeof(raw_data));
|
|
if (ret < 0) {
|
|
rpr0521_set_power_state(data, false, device_mask);
|
|
goto rpr0521_read_raw_out;
|
|
}
|
|
|
|
ret = rpr0521_set_power_state(data, false, device_mask);
|
|
|
|
rpr0521_read_raw_out:
|
|
mutex_unlock(&data->lock);
|
|
iio_device_release_direct_mode(indio_dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*val = le16_to_cpu(raw_data);
|
|
|
|
return IIO_VAL_INT;
|
|
|
|
case IIO_CHAN_INFO_SCALE:
|
|
mutex_lock(&data->lock);
|
|
ret = rpr0521_get_gain(data, chan->address, val, val2);
|
|
mutex_unlock(&data->lock);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
mutex_lock(&data->lock);
|
|
ret = rpr0521_read_samp_freq(data, chan->type, val, val2);
|
|
mutex_unlock(&data->lock);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
|
|
case IIO_CHAN_INFO_OFFSET:
|
|
mutex_lock(&data->lock);
|
|
ret = rpr0521_read_ps_offset(data, val);
|
|
mutex_unlock(&data->lock);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return IIO_VAL_INT;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int rpr0521_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan, int val,
|
|
int val2, long mask)
|
|
{
|
|
struct rpr0521_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_SCALE:
|
|
mutex_lock(&data->lock);
|
|
ret = rpr0521_set_gain(data, chan->address, val, val2);
|
|
mutex_unlock(&data->lock);
|
|
|
|
return ret;
|
|
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
mutex_lock(&data->lock);
|
|
ret = rpr0521_write_samp_freq_common(data, chan->type,
|
|
val, val2);
|
|
mutex_unlock(&data->lock);
|
|
|
|
return ret;
|
|
|
|
case IIO_CHAN_INFO_OFFSET:
|
|
mutex_lock(&data->lock);
|
|
ret = rpr0521_write_ps_offset(data, val);
|
|
mutex_unlock(&data->lock);
|
|
|
|
return ret;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static const struct iio_info rpr0521_info = {
|
|
.read_raw = rpr0521_read_raw,
|
|
.write_raw = rpr0521_write_raw,
|
|
.attrs = &rpr0521_attribute_group,
|
|
};
|
|
|
|
static int rpr0521_init(struct rpr0521_data *data)
|
|
{
|
|
int ret;
|
|
int id;
|
|
|
|
ret = regmap_read(data->regmap, RPR0521_REG_ID, &id);
|
|
if (ret < 0) {
|
|
dev_err(&data->client->dev, "Failed to read REG_ID register\n");
|
|
return ret;
|
|
}
|
|
|
|
if (id != RPR0521_MANUFACT_ID) {
|
|
dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n",
|
|
id, RPR0521_MANUFACT_ID);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* set default measurement time - 100 ms for both ALS and PS */
|
|
ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
|
|
RPR0521_MODE_MEAS_TIME_MASK,
|
|
RPR0521_DEFAULT_MEAS_TIME);
|
|
if (ret) {
|
|
pr_err("regmap_update_bits returned %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
#ifndef CONFIG_PM
|
|
ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
|
|
if (ret < 0)
|
|
return ret;
|
|
#endif
|
|
|
|
data->irq_timestamp = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rpr0521_poweroff(struct rpr0521_data *data)
|
|
{
|
|
int ret;
|
|
int tmp;
|
|
|
|
ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
|
|
RPR0521_MODE_ALS_MASK |
|
|
RPR0521_MODE_PXS_MASK,
|
|
RPR0521_MODE_ALS_DISABLE |
|
|
RPR0521_MODE_PXS_DISABLE);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
data->als_dev_en = false;
|
|
data->pxs_dev_en = false;
|
|
|
|
/*
|
|
* Int pin keeps state after power off. Set pin to high impedance
|
|
* mode to prevent power drain.
|
|
*/
|
|
ret = regmap_read(data->regmap, RPR0521_REG_INTERRUPT, &tmp);
|
|
if (ret) {
|
|
dev_err(&data->client->dev, "Failed to reset int pin.\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool rpr0521_is_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case RPR0521_REG_MODE_CTRL:
|
|
case RPR0521_REG_ALS_CTRL:
|
|
case RPR0521_REG_PXS_CTRL:
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config rpr0521_regmap_config = {
|
|
.name = RPR0521_REGMAP_NAME,
|
|
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
|
|
.max_register = RPR0521_REG_ID,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.volatile_reg = rpr0521_is_volatile_reg,
|
|
};
|
|
|
|
static int rpr0521_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct rpr0521_data *data;
|
|
struct iio_dev *indio_dev;
|
|
struct regmap *regmap;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
regmap = devm_regmap_init_i2c(client, &rpr0521_regmap_config);
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(&client->dev, "regmap_init failed!\n");
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
data = iio_priv(indio_dev);
|
|
i2c_set_clientdata(client, indio_dev);
|
|
data->client = client;
|
|
data->regmap = regmap;
|
|
|
|
mutex_init(&data->lock);
|
|
|
|
indio_dev->info = &rpr0521_info;
|
|
indio_dev->name = RPR0521_DRV_NAME;
|
|
indio_dev->channels = rpr0521_channels;
|
|
indio_dev->num_channels = ARRAY_SIZE(rpr0521_channels);
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
ret = rpr0521_init(data);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "rpr0521 chip init failed\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = pm_runtime_set_active(&client->dev);
|
|
if (ret < 0)
|
|
goto err_poweroff;
|
|
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_set_autosuspend_delay(&client->dev, RPR0521_SLEEP_DELAY_MS);
|
|
pm_runtime_use_autosuspend(&client->dev);
|
|
|
|
/*
|
|
* If sensor write/read is needed in _probe after _use_autosuspend,
|
|
* sensor needs to be _resumed first using rpr0521_set_power_state().
|
|
*/
|
|
|
|
/* IRQ to trigger setup */
|
|
if (client->irq) {
|
|
/* Trigger0 producer setup */
|
|
data->drdy_trigger0 = devm_iio_trigger_alloc(
|
|
indio_dev->dev.parent,
|
|
"%s-dev%d", indio_dev->name, indio_dev->id);
|
|
if (!data->drdy_trigger0) {
|
|
ret = -ENOMEM;
|
|
goto err_pm_disable;
|
|
}
|
|
data->drdy_trigger0->ops = &rpr0521_trigger_ops;
|
|
indio_dev->available_scan_masks = rpr0521_available_scan_masks;
|
|
iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev);
|
|
|
|
/* Ties irq to trigger producer handler. */
|
|
ret = devm_request_threaded_irq(&client->dev, client->irq,
|
|
rpr0521_drdy_irq_handler, rpr0521_drdy_irq_thread,
|
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
|
RPR0521_IRQ_NAME, indio_dev);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "request irq %d for trigger0 failed\n",
|
|
client->irq);
|
|
goto err_pm_disable;
|
|
}
|
|
|
|
ret = devm_iio_trigger_register(indio_dev->dev.parent,
|
|
data->drdy_trigger0);
|
|
if (ret) {
|
|
dev_err(&client->dev, "iio trigger register failed\n");
|
|
goto err_pm_disable;
|
|
}
|
|
|
|
/*
|
|
* Now whole pipe from physical interrupt (irq defined by
|
|
* devicetree to device) to trigger0 output is set up.
|
|
*/
|
|
|
|
/* Trigger consumer setup */
|
|
ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent,
|
|
indio_dev,
|
|
rpr0521_trigger_consumer_store_time,
|
|
rpr0521_trigger_consumer_handler,
|
|
&rpr0521_buffer_setup_ops);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "iio triggered buffer setup failed\n");
|
|
goto err_pm_disable;
|
|
}
|
|
}
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret)
|
|
goto err_pm_disable;
|
|
|
|
return 0;
|
|
|
|
err_pm_disable:
|
|
pm_runtime_disable(&client->dev);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
pm_runtime_put_noidle(&client->dev);
|
|
err_poweroff:
|
|
rpr0521_poweroff(data);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rpr0521_remove(struct i2c_client *client)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
|
|
pm_runtime_disable(&client->dev);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
pm_runtime_put_noidle(&client->dev);
|
|
|
|
rpr0521_poweroff(iio_priv(indio_dev));
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int rpr0521_runtime_suspend(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct rpr0521_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
mutex_lock(&data->lock);
|
|
/* If measurements are enabled, enable them on resume */
|
|
if (!data->als_need_dis)
|
|
data->als_ps_need_en = data->als_dev_en;
|
|
if (!data->pxs_need_dis)
|
|
data->pxs_ps_need_en = data->pxs_dev_en;
|
|
|
|
/* disable channels and sets {als,pxs}_dev_en to false */
|
|
ret = rpr0521_poweroff(data);
|
|
regcache_mark_dirty(data->regmap);
|
|
mutex_unlock(&data->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rpr0521_runtime_resume(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct rpr0521_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
regcache_sync(data->regmap);
|
|
if (data->als_ps_need_en) {
|
|
ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->als_ps_need_en = false;
|
|
}
|
|
|
|
if (data->pxs_ps_need_en) {
|
|
ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
|
|
if (ret < 0)
|
|
return ret;
|
|
data->pxs_ps_need_en = false;
|
|
}
|
|
msleep(100); //wait for first measurement result
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops rpr0521_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(rpr0521_runtime_suspend,
|
|
rpr0521_runtime_resume, NULL)
|
|
};
|
|
|
|
static const struct acpi_device_id rpr0521_acpi_match[] = {
|
|
{"RPR0521", 0},
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, rpr0521_acpi_match);
|
|
|
|
static const struct i2c_device_id rpr0521_id[] = {
|
|
{"rpr0521", 0},
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, rpr0521_id);
|
|
|
|
static struct i2c_driver rpr0521_driver = {
|
|
.driver = {
|
|
.name = RPR0521_DRV_NAME,
|
|
.pm = &rpr0521_pm_ops,
|
|
.acpi_match_table = ACPI_PTR(rpr0521_acpi_match),
|
|
},
|
|
.probe = rpr0521_probe,
|
|
.remove = rpr0521_remove,
|
|
.id_table = rpr0521_id,
|
|
};
|
|
|
|
module_i2c_driver(rpr0521_driver);
|
|
|
|
MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
|
|
MODULE_DESCRIPTION("RPR0521 ROHM Ambient Light and Proximity Sensor driver");
|
|
MODULE_LICENSE("GPL v2");
|