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Message-Id: <1419029879-12024-9-git-send-email-irina.tirdea@intel.com>
Date: Sat, 20 Dec 2014 00:57:59 +0200
From: Irina Tirdea <irina.tirdea@...el.com>
To: Jonathan Cameron <jic23@...nel.org>, linux-iio@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Vlad Dogaru <vlad.dogaru@...el.com>,
Daniel Baluta <daniel.baluta@...el.com>,
Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald <pmeerw@...erw.net>,
Irina Tirdea <irina.tirdea@...el.com>
Subject: [PATCH 8/8] iio: add driver for Freescale MMA9553
Add support for Freescale MMA9553L Intelligent Pedometer Platform.
The following functionalities are supported:
- step counter (counts the number of steps using a HW register)
- step detector (generates an iio event at every step the user takes)
- activity recognition (rest, walking, jogging, running)
- speed
- calories
- distance
To get accurate pedometer results, the user's height, weight and gender
need to be configured.
The specifications can be downloaded from:
http://www.freescale.com/files/sensors/doc/ref_manual/MMA955xLSWRM.pdf
http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf
Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
---
drivers/iio/accel/Kconfig | 12 +-
drivers/iio/accel/Makefile | 1 +
drivers/iio/accel/mma9551_core.c | 88 +++
drivers/iio/accel/mma9551_core.h | 17 +-
drivers/iio/accel/mma9553.c | 1239 ++++++++++++++++++++++++++++++++++++++
5 files changed, 1355 insertions(+), 2 deletions(-)
create mode 100644 drivers/iio/accel/mma9553.c
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 0600798..afd50d0 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -107,7 +107,7 @@ config KXCJK1013
config MMA9551_CORE
tristate
- depends on MMA9551
+ depends on MMA9551 || MMA9553
config MMA9551
tristate "Freescale MMA9551L Intelligent Motion-Sensing Platform Driver"
@@ -121,4 +121,14 @@ config MMA9551
To compile this driver as a module, choose M here: the module
will be called mma9551.
+config MMA9553
+ tristate "Freescale MMA9553L Intelligent Pedometer Platform Driver"
+ depends on I2C
+ select MMA9551_CORE
+ help
+ Say yes here to build support for the Freescale MMA9553L
+ Intelligent Pedometer Platform Driver.
+
+ To compile this driver as a module, choose M here: the module
+ will be called mma9553.
endmenu
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index 8105316..f815695 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_MMA8452) += mma8452.o
obj-$(CONFIG_MMA9551_CORE) += mma9551_core.o
obj-$(CONFIG_MMA9551) += mma9551.o
+obj-$(CONFIG_MMA9553) += mma9553.o
obj-$(CONFIG_IIO_ST_ACCEL_3AXIS) += st_accel.o
st_accel-y := st_accel_core.o
diff --git a/drivers/iio/accel/mma9551_core.c b/drivers/iio/accel/mma9551_core.c
index cab481b..743a868 100644
--- a/drivers/iio/accel/mma9551_core.c
+++ b/drivers/iio/accel/mma9551_core.c
@@ -53,6 +53,11 @@
#define MMA9551_AFE_Y_ACCEL_REG 0x02
#define MMA9551_AFE_Z_ACCEL_REG 0x04
+/* Reset/Suspend/Clear application */
+#define MMA9551_RSC_RESET 0x00
+#define MMA9551_RSC_OFFSET(mask) (3 - (ffs(mask) - 1) / 8)
+#define MMA9551_RSC_VAL(mask) (mask >> (((ffs(mask) - 1) / 8) * 8))
+
/*
* A response is composed of:
* - control registers: MB0-3
@@ -215,6 +220,30 @@ int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
}
EXPORT_SYMBOL(mma9551_read_status_byte);
+int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 *val)
+{
+ int ret;
+ __be16 v;
+
+ ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
+ reg, NULL, 0, (u8 *)&v, 2);
+ *val = be16_to_cpu(v);
+
+ return ret;
+}
+EXPORT_SYMBOL(mma9551_read_config_word);
+
+int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 val)
+{
+ __be16 v = cpu_to_be16(val);
+
+ return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg,
+ (u8 *) &v, 2, NULL, 0);
+}
+EXPORT_SYMBOL(mma9551_write_config_word);
+
int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
u16 reg, u16 *val)
{
@@ -229,6 +258,56 @@ int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
}
EXPORT_SYMBOL(mma9551_read_status_word);
+int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf)
+{
+ int ret, i;
+ int len_words = len / sizeof(u16);
+ __be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
+
+ ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,
+ reg, NULL, 0, (u8 *) be_buf, len);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < len_words; i++)
+ buf[i] = be16_to_cpu(be_buf[i]);
+ return 0;
+}
+EXPORT_SYMBOL(mma9551_read_config_words);
+
+int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf)
+{
+ int ret, i;
+ int len_words = len / sizeof(u16);
+ __be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
+
+ ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,
+ reg, NULL, 0, (u8 *) be_buf, len);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < len_words; i++)
+ buf[i] = be16_to_cpu(be_buf[i]);
+ return 0;
+}
+EXPORT_SYMBOL(mma9551_read_status_words);
+
+int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf)
+{
+ int i;
+ int len_words = len / sizeof(u16);
+ __be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];
+
+ for (i = 0; i < len_words; i++)
+ be_buf[i] = cpu_to_be16(buf[i]);
+ return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG,
+ reg, (u8 *) be_buf, len, NULL, 0);
+}
+EXPORT_SYMBOL(mma9551_write_config_words);
+
int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,
u16 reg, u8 mask, u8 val)
{
@@ -437,6 +516,15 @@ int mma9551_read_accel_scale(int *val, int *val2)
}
EXPORT_SYMBOL(mma9551_read_accel_scale);
+int mma9551_app_reset(struct i2c_client *client, u32 app_mask)
+{
+ return mma9551_write_config_byte(client, MMA9551_APPID_RCS,
+ MMA9551_RSC_RESET +
+ MMA9551_RSC_OFFSET(app_mask),
+ MMA9551_RSC_VAL(app_mask));
+}
+EXPORT_SYMBOL(mma9551_app_reset);
+
MODULE_AUTHOR("Irina Tirdea <irina.tirdea@...el.com>");
MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@...el.com>");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/accel/mma9551_core.h b/drivers/iio/accel/mma9551_core.h
index 0e1c9bb..19b6253 100644
--- a/drivers/iio/accel/mma9551_core.h
+++ b/drivers/iio/accel/mma9551_core.h
@@ -21,9 +21,13 @@
#define MMA9551_APPID_AFE 0x06
#define MMA9551_APPID_TILT 0x0B
#define MMA9551_APPID_SLEEP_WAKE 0x12
-#define MMA9551_APPID_RESET 0x17
+#define MMA9551_APPID_PEDOMETER 0x15
+#define MMA9551_APPID_RCS 0x17
#define MMA9551_APPID_NONE 0xff
+/* Reset/Suspend/Clear application app masks */
+#define MMA9551_RSC_PED BIT(21)
+
#define MMA9551_AUTO_SUSPEND_DELAY_MS 2000
enum mma9551_gpio_pin {
@@ -56,8 +60,18 @@ int mma9551_write_config_byte(struct i2c_client *client, u8 app_id,
u16 reg, u8 val);
int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,
u16 reg, u8 *val);
+int mma9551_read_config_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 *val);
+int mma9551_write_config_word(struct i2c_client *client, u8 app_id,
+ u16 reg, u16 val);
int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
u16 reg, u16 *val);
+int mma9551_read_config_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf);
+int mma9551_read_status_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf);
+int mma9551_write_config_words(struct i2c_client *client, u8 app_id,
+ u16 reg, u8 len, u16 *buf);
int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,
u16 reg, u8 mask, u8 val);
int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin,
@@ -70,5 +84,6 @@ int mma9551_read_accel_chan(struct i2c_client *client,
const struct iio_chan_spec *chan,
int *val, int *val2);
int mma9551_read_accel_scale(int *val, int *val2);
+int mma9551_app_reset(struct i2c_client *client, u32 app_mask);
#endif /* _MMA9551_CORE_H_ */
diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
new file mode 100644
index 0000000..35b657d
--- /dev/null
+++ b/drivers/iio/accel/mma9553.c
@@ -0,0 +1,1239 @@
+/*
+ * Freescale MMA9553L Intelligent Pedometer driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/pm_runtime.h>
+#include "mma9551_core.h"
+
+#define MMA9553_DRV_NAME "mma9553"
+#define MMA9553_IRQ_NAME "mma9553_event"
+#define MMA9553_GPIO_NAME "mma9553_int"
+
+/* Pedometer configuration registers (R/W) */
+#define MMA9553_CONF_SLEEPMIN 0x00
+#define MMA9553_CONF_SLEEPMAX 0x02
+#define MMA9553_CONF_SLEEPTHD 0x04
+#define MMA9553_CONF_WORD GENMASK(15, 0)
+
+#define MMA9553_CONF_CONF_STEPLEN 0x06
+#define MMA9553_CONF_CONFIG BIT(15)
+#define MMA9553_CONF_ACT_DBCNTM BIT(14)
+#define MMA9553_CONF_SLP_DBCNTM BIT(13)
+#define MMA9553_CONF_STEPLEN GENMASK(7, 0)
+
+#define MMA9553_CONF_HEIGHT_WEIGHT 0x08
+#define MMA9553_CONF_HEIGHT GENMASK(15, 8)
+#define MMA9553_CONF_WEIGHT GENMASK(7, 0)
+
+#define MMA9553_CONF_FILTER 0x0A
+#define MMA9553_CONF_FILTSTEP GENMASK(15, 8)
+#define MMA9553_CONF_MALE BIT(7)
+#define MMA9553_CONF_FILTTIME GENMASK(6, 0)
+
+#define MMA9553_CONF_SPEED_STEP 0x0C
+#define MMA9553_CONF_SPDPRD GENMASK(15, 8)
+#define MMA9553_CONF_STEPCOALESCE GENMASK(7, 0)
+
+#define MMA9553_CONF_ACTTHD 0x0E
+
+/* Pedometer status registers (R-only) */
+#define MMA9553_STATUS 0x00
+#define MMA9553_STATUS_MRGFL BIT(15)
+#define MMA9553_STATUS_SUSPCHG BIT(14)
+#define MMA9553_STATUS_STEPCHG BIT(13)
+#define MMA9553_STATUS_ACTCHG BIT(12)
+#define MMA9553_STATUS_SUSP BIT(11)
+#define MMA9553_STATUS_ACTIVITY (BIT(10) | BIT(9) | BIT(8))
+#define MMA9553_STATUS_VERSION 0x00FF
+
+#define MMA9553_STEPCNT 0x02
+#define MMA9553_DISTANCE 0x04
+#define MMA9553_SPEED 0x06
+#define MMA9553_CALORIES 0x08
+#define MMA9553_SLEEPCNT 0x0A
+
+/* Pedometer events are always mapped to this pin. */
+#define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6
+#define MMA9553_DEFAULT_GPIO_POLARITY 0
+
+/* Bitnum used for gpio configuration = bit number in high status byte */
+#define STATUS_TO_BITNUM(bit) (ffs(bit) - 9)
+
+#define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */
+
+/*
+ * The internal activity level must be stable for ACTTHD samples before
+ * ACTIVITY is updated.The ACTIVITY variable contains the current activity
+ * level and is updated every time a step is detected or once a second
+ * if there are no steps. So for 100% confidence level we need to have
+ * the same activity level for about 30 sec.
+ */
+#define MMA9553_MAX_ACTTHD (MMA9553_DEFAULT_SAMPLE_RATE * 30)
+#define MMA9553_PERCENTAGE_TO_THD(prc) (((prc) * MMA9553_MAX_ACTTHD) / 100)
+#define MMA9553_THD_TO_PERCENTAGE(thr) (((thr) * 100) / MMA9553_MAX_ACTTHD)
+
+/*
+ * Autonomously suspend pedometer if acceleration vector magnitude
+ * is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds.
+ */
+#define MMA9553_DEFAULT_SLEEPMIN 3688 /* 0,9 g */
+#define MMA9553_DEFAULT_SLEEPMAX 4508 /* 1,1 g */
+#define MMA9553_DEFAULT_SLEEPTHD (MMA9553_DEFAULT_SAMPLE_RATE * 30)
+
+#define MMA9553_CONFIG_RETRIES 2
+
+/* Status register - activity field */
+enum activity_level {
+ ACTIVITY_UNKNOWN,
+ ACTIVITY_REST,
+ ACTIVITY_WALKING,
+ ACTIVITY_JOGGING,
+ ACTIVITY_RUNNING,
+};
+
+struct mma9553_event {
+ enum iio_chan_type type;
+ enum iio_modifier mod;
+ enum iio_event_direction dir;
+ bool enabled;
+};
+
+struct mma9553_conf_regs {
+ u16 sleepmin;
+ u16 sleepmax;
+ u16 sleepthd;
+ u16 config;
+ u16 height_weight;
+ u16 filter;
+ u16 speed_step;
+ u16 actthd;
+} __packed;
+
+struct mma9553_data {
+ struct i2c_client *client;
+ struct mutex mutex;
+ struct mma9553_conf_regs conf;
+ struct mma9553_event *events;
+ int num_events;
+ u8 gpio_bitnum;
+ /*
+ * This is used for all features that depend on step count:
+ * step count, distance, speed, calories.
+ */
+ bool stepcnt_enabled;
+ u16 stepcnt;
+ u8 activity;
+};
+
+static u8 mma9553_get_bits(u16 val, u16 mask)
+{
+ return (val & mask) >> (ffs(mask) - 1);
+}
+
+static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask)
+{
+ return (current_val & ~mask) | (val << (ffs(mask) - 1));
+}
+
+static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity)
+{
+ switch (activity) {
+ case ACTIVITY_RUNNING:
+ return IIO_MOD_RUNNING;
+ case ACTIVITY_JOGGING:
+ return IIO_MOD_JOGGING;
+ case ACTIVITY_WALKING:
+ return IIO_MOD_WALKING;
+ case ACTIVITY_REST:
+ return IIO_MOD_STILL;
+ case ACTIVITY_UNKNOWN:
+ default:
+ return IIO_NO_MOD;
+ }
+}
+
+static struct mma9553_event *mma9553_get_event(struct mma9553_data *data,
+ enum iio_chan_type type,
+ enum iio_modifier mod,
+ enum iio_event_direction dir)
+{
+ int i;
+
+ for (i = 0; i < data->num_events; i++)
+ if (data->events[i].type == type &&
+ data->events[i].mod == mod &&
+ data->events[i].dir == dir)
+ return &data->events[i];
+ return NULL;
+}
+
+static bool mma9553_is_any_event_enabled(struct mma9553_data *data,
+ bool check_type,
+ enum iio_chan_type type)
+{
+ int i;
+
+ for (i = 0; i < data->num_events; i++)
+ if ((check_type && data->events[i].type == type &&
+ data->events[i].enabled) ||
+ (!check_type && data->events[i].enabled))
+ return true;
+ return false;
+}
+
+static int mma9553_set_config(struct mma9553_data *data, u16 reg,
+ u16 *p_reg_val, u16 val, u16 mask)
+{
+ int ret, retries;
+ u16 reg_val, config;
+
+ reg_val = *p_reg_val;
+ if (val == mma9553_get_bits(reg_val, mask))
+ return 0;
+
+ reg_val = mma9553_set_bits(reg_val, val, mask);
+ ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
+ reg, reg_val);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "error writing config register 0x%x\n", reg);
+ return ret;
+ }
+
+ *p_reg_val = reg_val;
+
+ /* Reinitializes the pedometer with current configuration values */
+ config = mma9553_set_bits(data->conf.config, 1, MMA9553_CONF_CONFIG);
+
+ ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER,
+ MMA9553_CONF_CONF_STEPLEN, config);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "error writing config register 0x%x\n",
+ MMA9553_CONF_CONF_STEPLEN);
+ return ret;
+ }
+
+ retries = MMA9553_CONFIG_RETRIES;
+ do {
+ mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
+ ret = mma9551_read_config_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_CONF_CONF_STEPLEN,
+ &config);
+ if (ret < 0)
+ return ret;
+ } while (mma9553_get_bits(config, MMA9553_CONF_CONFIG) &&
+ --retries > 0);
+
+ return 0;
+}
+
+static int mma9553_read_activity_stepcnt(struct mma9553_data *data,
+ u8 *activity, u16 *stepcnt)
+{
+ u32 status_stepcnt;
+ u16 status;
+ int ret;
+
+ ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER,
+ MMA9553_STATUS, sizeof(u32),
+ (u16 *) &status_stepcnt);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "error reading status and stepcnt\n");
+ return ret;
+ }
+
+ status = status_stepcnt & MMA9553_CONF_WORD;
+ *activity = mma9553_get_bits(status, MMA9553_STATUS_ACTIVITY);
+ *stepcnt = status_stepcnt >> 16;
+ return 0;
+}
+
+static int mma9553_conf_gpio(struct mma9553_data *data)
+{
+ u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER;
+ int ret;
+ struct mma9553_event *ev_step_detect;
+ bool activity_enabled;
+
+ activity_enabled =
+ mma9553_is_any_event_enabled(data, true, IIO_ACTIVITY);
+ ev_step_detect =
+ mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
+
+ /*
+ * If both step detector and activity are enabled, use the MRGFL bit.
+ * This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags.
+ */
+ if (activity_enabled && ev_step_detect->enabled) {
+ bitnum = STATUS_TO_BITNUM(MMA9553_STATUS_MRGFL);
+ } else if (ev_step_detect->enabled) {
+ bitnum = STATUS_TO_BITNUM(MMA9553_STATUS_STEPCHG);
+ } else if (activity_enabled) {
+ bitnum = STATUS_TO_BITNUM(MMA9553_STATUS_ACTCHG);
+ } else { /* Reset */
+ appid = MMA9551_APPID_NONE;
+ }
+
+ if (data->gpio_bitnum == bitnum)
+ return 0;
+
+ /* Save initial values for activity and stepcnt */
+ if (activity_enabled || ev_step_detect->enabled)
+ mma9553_read_activity_stepcnt(data, &data->activity,
+ &data->stepcnt);
+
+ ret = mma9551_gpio_config(data->client,
+ MMA9553_DEFAULT_GPIO_PIN,
+ appid, bitnum, MMA9553_DEFAULT_GPIO_POLARITY);
+ if (ret < 0)
+ return ret;
+ data->gpio_bitnum = bitnum;
+ return 0;
+}
+
+static int mma9553_init(struct mma9553_data *data)
+{
+ int ret;
+
+ ret = mma9551_read_version(data->client);
+ if (ret)
+ return ret;
+
+ /*
+ * Read all the pedometer configuration registers. This is used as
+ * a device identification command to differentiate the MMA9553L
+ * from the MMA9550L.
+ */
+ ret =
+ mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER,
+ MMA9553_CONF_SLEEPMIN,
+ sizeof(data->conf), (u16 *) &data->conf);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "device is not MMA9553L: failed to read cfg regs.\n");
+ return ret;
+ }
+
+
+ /* Reset gpio */
+ data->gpio_bitnum = -1;
+ ret = mma9553_conf_gpio(data);
+ if (ret < 0)
+ return ret;
+
+ ret = mma9551_app_reset(data->client, MMA9551_RSC_PED);
+ if (ret < 0)
+ return ret;
+
+ /* Init config registers */
+ data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN;
+ data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX;
+ data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD;
+ data->conf.config =
+ mma9553_set_bits(data->conf.config, 1, MMA9553_CONF_CONFIG);
+ /*
+ * Clear the activity debounce counter when the activity level changes,
+ * so that the confidence level applies for any activity level.
+ */
+ data->conf.config =
+ mma9553_set_bits(data->conf.config, 1, MMA9553_CONF_ACT_DBCNTM);
+ ret =
+ mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER,
+ MMA9553_CONF_SLEEPMIN,
+ sizeof(data->conf), (u16 *) &data->conf);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "failed to write configuration registers.\n");
+ return ret;
+ }
+
+ return mma9551_set_device_state(data->client, true);
+}
+
+static int mma9553_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+ u16 tmp;
+ u8 activity;
+ bool powered_on;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_STEPS:
+ /*
+ * The HW only counts steps and other dependent
+ * parameters (speed, distance, calories, activity)
+ * if power is on (from enabling an event or the
+ * step counter */
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_STEPCNT, &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp;
+ return IIO_VAL_INT;
+ case IIO_DISTANCE:
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_DISTANCE, &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp;
+ return IIO_VAL_INT;
+ case IIO_ACTIVITY:
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_STATUS, &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+
+ activity =
+ mma9553_get_bits(tmp, MMA9553_STATUS_ACTIVITY);
+
+ /*
+ * The device does not support confidence value levels,
+ * so we will always have 100% for current activity and
+ * 0% for the others.
+ */
+ if (chan->channel2 == mma9553_activity_to_mod(activity))
+ *val = 100;
+ else
+ *val = 0;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_SPEED: /* m/h */
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_SPEED, &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp;
+ return IIO_VAL_INT;
+ case IIO_CALORIES: /* Cal or kcal */
+ powered_on =
+ mma9553_is_any_event_enabled(data, false, 0) ||
+ data->stepcnt_enabled;
+ if (!powered_on)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_status_word(data->client,
+ MMA9551_APPID_PEDOMETER,
+ MMA9553_CALORIES, &tmp);
+ mutex_unlock(&data->mutex);
+ if (ret < 0)
+ return ret;
+ *val = tmp;
+ return IIO_VAL_INT;
+ case IIO_ACCEL:
+ mutex_lock(&data->mutex);
+ ret = mma9551_read_accel_chan(data->client,
+ chan, val, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_SPEED: /* m/h to m/s */
+ *val = 0;
+ *val2 = 277; /* 0.000277 */
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CALORIES: /* Cal or kcal to J */
+ *val = 4184;
+ return IIO_VAL_INT;
+ case IIO_ACCEL:
+ return mma9551_read_accel_scale(val, val2);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_ENABLE:
+ *val = data->stepcnt_enabled;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBHEIGHT:
+ *val = mma9553_get_bits(data->conf.height_weight,
+ MMA9553_CONF_HEIGHT);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBWEIGHT:
+ *val = mma9553_get_bits(data->conf.height_weight,
+ MMA9553_CONF_WEIGHT);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBGENDER:
+ *val = mma9553_get_bits(data->conf.filter, MMA9553_CONF_MALE);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_OFFSET:
+ switch (chan->type) {
+ case IIO_STEPS:
+ *val = mma9553_get_bits(data->conf.filter,
+ MMA9553_CONF_FILTSTEP);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_STEPS:
+ *val = mma9553_get_bits(data->conf.filter,
+ MMA9553_CONF_FILTTIME);
+ return IIO_VAL_INT;
+ case IIO_SPEED:
+ *val = mma9553_get_bits(data->conf.speed_step,
+ MMA9553_CONF_SPDPRD);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9553_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_ENABLE:
+ if (data->stepcnt_enabled == !!val)
+ return 0;
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_power_state(data->client, val);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ data->stepcnt_enabled = val;
+ mutex_unlock(&data->mutex);
+ return 0;
+ case IIO_CHAN_INFO_CALIBHEIGHT:
+ if (val < 0 || val > 255)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data,
+ MMA9553_CONF_HEIGHT_WEIGHT,
+ &data->conf.height_weight,
+ val, MMA9553_CONF_HEIGHT);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_CHAN_INFO_CALIBWEIGHT:
+ if (val < 0 || val > 255)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data,
+ MMA9553_CONF_HEIGHT_WEIGHT,
+ &data->conf.height_weight,
+ val, MMA9553_CONF_WEIGHT);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_CHAN_INFO_CALIBGENDER:
+ /* Gender can only be 0(female) or 1(male) */
+ if ((val != 0) && (val != 1))
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_CONF_FILTER,
+ &data->conf.filter, val,
+ MMA9553_CONF_MALE);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_CHAN_INFO_OFFSET:
+ switch (chan->type) {
+ case IIO_STEPS:
+ /*
+ * Set to 0 to disable step filtering. If the value
+ * specified is greater than 6, then 6 will be used.
+ */
+ if (val < 0)
+ return -EINVAL;
+ if (val > 6)
+ val = 6;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_CONF_FILTER,
+ &data->conf.filter, val,
+ MMA9553_CONF_FILTSTEP);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_STEPS:
+ if (val < 0 || val > 127)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_CONF_FILTER,
+ &data->conf.filter, val,
+ MMA9553_CONF_FILTTIME);
+ mutex_unlock(&data->mutex);
+ return ret;
+ case IIO_SPEED:
+ /*
+ * If set to a value greater than 5, then 5 will be
+ * used. Warning: Do not set SPDPRD to 0 or 1 as
+ * this may cause undesirable behavior.
+ */
+ if (val < 2)
+ return -EINVAL;
+ if (val > 5)
+ val = 5;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_CONF_SPEED_STEP,
+ &data->conf.speed_step, val,
+ MMA9553_CONF_SPDPRD);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9553_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+
+ struct mma9553_data *data = iio_priv(indio_dev);
+ struct mma9553_event *event;
+
+ event = mma9553_get_event(data, chan->type, chan->channel2, dir);
+ if (!event)
+ return -EINVAL;
+ return event->enabled;
+}
+
+static int mma9553_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ struct mma9553_event *event;
+ int ret;
+
+ event = mma9553_get_event(data, chan->type, chan->channel2, dir);
+ if (!event)
+ return -EINVAL;
+
+ if (event->enabled == state)
+ return 0;
+
+ mutex_lock(&data->mutex);
+
+ ret = mma9551_set_power_state(data->client, state);
+ if (ret < 0)
+ goto out;
+ event->enabled = state;
+
+ ret = mma9553_conf_gpio(data);
+ if (ret < 0)
+ goto err_conf_gpio;
+
+ goto out;
+
+err_conf_gpio:
+ if (state) {
+ event->enabled = false;
+ mma9551_set_power_state(data->client, false);
+ }
+out:
+ mutex_unlock(&data->mutex);
+ return ret;
+}
+
+static int mma9553_read_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int prc;
+
+ *val2 = 0;
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ switch (chan->type) {
+ case IIO_ACTIVITY:
+ prc = MMA9553_THD_TO_PERCENTAGE(data->conf.actthd);
+ if (dir == IIO_EV_DIR_RISING)
+ *val = prc;
+ else if (dir == IIO_EV_DIR_FALLING)
+ *val = 100 - prc;
+ else
+ return -EINVAL;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_EV_INFO_PERIOD:
+ switch (chan->type) {
+ case IIO_STEPS:
+ *val = mma9553_get_bits(data->conf.speed_step,
+ MMA9553_CONF_STEPCOALESCE);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int mma9553_write_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int prc, thd;
+ int ret;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ switch (chan->type) {
+ case IIO_ACTIVITY:
+ if (val < 0 || val > 100)
+ return -EINVAL;
+
+ if (dir == IIO_EV_DIR_RISING)
+ prc = val;
+ else if (dir == IIO_EV_DIR_FALLING)
+ prc = 100 - val;
+ else
+ return -EINVAL;
+ thd = MMA9553_PERCENTAGE_TO_THD(prc);
+
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_CONF_ACTTHD,
+ &data->conf.actthd, thd,
+ MMA9553_CONF_WORD);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_EV_INFO_PERIOD:
+ switch (chan->type) {
+ case IIO_STEPS:
+ if (val < 0 || val > 255)
+ return -EINVAL;
+ mutex_lock(&data->mutex);
+ ret = mma9553_set_config(data, MMA9553_CONF_SPEED_STEP,
+ &data->conf.speed_step, val,
+ MMA9553_CONF_STEPCOALESCE);
+ mutex_unlock(&data->mutex);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_event_spec mma9553_step_event = {
+ .type = IIO_EV_TYPE_INSTANCE,
+ .dir = IIO_EV_DIR_NONE,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_PERIOD),
+};
+
+static const struct iio_event_spec mma9553_activity_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_VALUE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_VALUE),
+ },
+};
+
+#define MMA9553_PEDOMETER_CHANNEL(_type, _mask) { \
+ .type = _type, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE) | \
+ BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \
+ BIT(IIO_CHAN_INFO_CALIBGENDER) | \
+ _mask, \
+}
+
+#define MMA9553_ACTIVITY_CHANNEL(_chan2) { \
+ .type = IIO_ACTIVITY, \
+ .modified = 1, \
+ .channel2 = _chan2, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \
+ BIT(IIO_CHAN_INFO_CALIBGENDER), \
+ .event_spec = mma9553_activity_events, \
+ .num_event_specs = ARRAY_SIZE(mma9553_activity_events), \
+}
+
+static const struct iio_chan_spec mma9553_channels[] = {
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_X),
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_Y),
+ MMA9551_ACCEL_CHANNEL(IIO_MOD_Z),
+
+ {
+ .type = IIO_STEPS,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_ENABLE) |
+ BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .event_spec = &mma9553_step_event,
+ .num_event_specs = 1,
+ },
+
+ MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)),
+ MMA9553_PEDOMETER_CHANNEL(IIO_SPEED, BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME)),
+ MMA9553_PEDOMETER_CHANNEL(IIO_CALORIES, BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_CALIBWEIGHT)),
+
+ MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING),
+ MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING),
+ MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING),
+ MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL),
+};
+
+static const struct iio_info mma9553_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = mma9553_read_raw,
+ .write_raw = mma9553_write_raw,
+ .read_event_config = mma9553_read_event_config,
+ .write_event_config = mma9553_write_event_config,
+ .read_event_value = mma9553_read_event_value,
+ .write_event_value = mma9553_write_event_value,
+};
+
+static struct mma9553_event mma9553_events[] = {
+ {
+ .type = IIO_STEPS,
+ .mod = IIO_NO_MOD,
+ .dir = IIO_EV_DIR_NONE,
+ .enabled = false,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_STILL,
+ .dir = IIO_EV_DIR_RISING,
+ .enabled = false,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_STILL,
+ .dir = IIO_EV_DIR_FALLING,
+ .enabled = false,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_WALKING,
+ .dir = IIO_EV_DIR_RISING,
+ .enabled = false,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_WALKING,
+ .dir = IIO_EV_DIR_FALLING,
+ .enabled = false,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_JOGGING,
+ .dir = IIO_EV_DIR_RISING,
+ .enabled = false,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_JOGGING,
+ .dir = IIO_EV_DIR_FALLING,
+ .enabled = false,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_RUNNING,
+ .dir = IIO_EV_DIR_RISING,
+ .enabled = false,
+ },
+ {
+ .type = IIO_ACTIVITY,
+ .mod = IIO_MOD_RUNNING,
+ .dir = IIO_EV_DIR_FALLING,
+ .enabled = false,
+ },
+};
+
+static irqreturn_t mma9553_irq_handler(int irq, void *private)
+{
+ /*
+ * Since we only configure the interrupt pin when an
+ * event is enabled, we are sure we have at least
+ * one event enabled at this point.
+ */
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t mma9553_event_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct mma9553_data *data = iio_priv(indio_dev);
+ u16 stepcnt;
+ u8 activity;
+ struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect;
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return IRQ_HANDLED;
+ }
+
+ ev_prev_activity =
+ mma9553_get_event(data, IIO_ACTIVITY,
+ mma9553_activity_to_mod(data->activity),
+ IIO_EV_DIR_FALLING);
+ ev_activity =
+ mma9553_get_event(data, IIO_ACTIVITY,
+ mma9553_activity_to_mod(activity),
+ IIO_EV_DIR_RISING);
+ ev_step_detect =
+ mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, IIO_EV_DIR_NONE);
+
+ if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) {
+ data->stepcnt = stepcnt;
+ iio_push_event(indio_dev,
+ IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
+ IIO_EV_DIR_NONE, IIO_EV_TYPE_INSTANCE, 0, 0, 0),
+ iio_get_time_ns());
+ }
+
+ if (activity != data->activity) {
+ data->activity = activity;
+ /* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */
+ if (ev_prev_activity && ev_prev_activity->enabled)
+ iio_push_event(indio_dev,
+ IIO_EVENT_CODE(IIO_ACTIVITY, 0,
+ ev_prev_activity->mod,
+ IIO_EV_DIR_FALLING,
+ IIO_EV_TYPE_THRESH, 0, 0, 0),
+ iio_get_time_ns());
+
+ if (ev_activity && ev_activity->enabled)
+ iio_push_event(indio_dev,
+ IIO_EVENT_CODE(IIO_ACTIVITY, 0,
+ ev_activity->mod,
+ IIO_EV_DIR_RISING,
+ IIO_EV_TYPE_THRESH, 0, 0, 0),
+ iio_get_time_ns());
+ }
+ mutex_unlock(&data->mutex);
+ return IRQ_HANDLED;
+}
+
+static int mma9553_gpio_probe(struct i2c_client *client)
+{
+ struct device *dev;
+ struct gpio_desc *gpio;
+ int ret;
+
+ if (!client)
+ return -EINVAL;
+
+ dev = &client->dev;
+
+ /* data ready gpio interrupt pin */
+ gpio = devm_gpiod_get_index(dev, MMA9553_GPIO_NAME, 0);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "acpi gpio get index failed\n");
+ return PTR_ERR(gpio);
+ }
+
+ ret = gpiod_direction_input(gpio);
+ if (ret)
+ return ret;
+
+ ret = gpiod_to_irq(gpio);
+
+ dev_dbg(dev, "gpio resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+
+ return ret;
+}
+
+static const char *mma9553_match_acpi_device(struct device *dev)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+
+ return dev_name(dev);
+}
+
+static int mma9553_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct mma9553_data *data;
+ struct iio_dev *indio_dev;
+ const char *name = NULL;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ if (id)
+ name = id->name;
+ else if (ACPI_HANDLE(&client->dev))
+ name = mma9553_match_acpi_device(&client->dev);
+ else
+ return -ENOSYS;
+
+ mutex_init(&data->mutex);
+ data->events = mma9553_events;
+ data->num_events = ARRAY_SIZE(mma9553_events);
+
+ ret = mma9553_init(data);
+ if (ret < 0)
+ return ret;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = mma9553_channels;
+ indio_dev->num_channels = ARRAY_SIZE(mma9553_channels);
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &mma9553_info;
+
+ if (client->irq < 0)
+ client->irq = mma9553_gpio_probe(client);
+
+ if (client->irq >= 0) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ mma9553_irq_handler,
+ mma9553_event_handler,
+ IRQF_TRIGGER_RISING,
+ MMA9553_IRQ_NAME, indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "request irq %d failed\n",
+ client->irq);
+ goto out_poweroff;
+ }
+
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to register iio device\n");
+ goto out_poweroff;
+ }
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto out_iio_unregister;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ MMA9551_AUTO_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ dev_dbg(&indio_dev->dev, "Registered device %s\n", name);
+ return 0;
+
+out_iio_unregister:
+ iio_device_unregister(indio_dev);
+out_poweroff:
+ mma9551_set_device_state(client, false);
+ return ret;
+}
+
+static int mma9553_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct mma9553_data *data = iio_priv(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ iio_device_unregister(indio_dev);
+ mutex_lock(&data->mutex);
+ mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mma9553_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "powering off device failed\n");
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static int mma9553_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = mma9551_set_device_state(data->client, true);
+ if (ret < 0)
+ return ret;
+
+ mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE);
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int mma9553_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, false);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int mma9553_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct mma9553_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = mma9551_set_device_state(data->client, true);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+#endif
+
+static const struct dev_pm_ops mma9553_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
+ SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
+ mma9553_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id mma9553_acpi_match[] = {
+ {"MMA9553", 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match);
+
+static const struct i2c_device_id mma9553_id[] = {
+ {"mma9553", 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(i2c, mma9553_id);
+
+static struct i2c_driver mma9553_driver = {
+ .driver = {
+ .name = MMA9553_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
+ .pm = &mma9553_pm_ops,
+ },
+ .probe = mma9553_probe,
+ .remove = mma9553_remove,
+ .id_table = mma9553_id,
+};
+
+module_i2c_driver(mma9553_driver);
+
+MODULE_AUTHOR("Irina Tirdea <irina.tirdea@...el.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MMA9553L pedometer platform driver");
--
1.7.9.5
--
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