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iio: imu: inv_mpu6050: Use regmap instead of i2c specific functions 

Use regmap instead of i2c specific functions.
This is in preparation of splitting this driver into core and
i2c specific functionality.

Signed-off-by: Adriana Reus <adriana.reus@intel.com>
Acked-by: Crt Mori <cmo@melexis.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Adriana Reus 2016-02-12 13:44:43 +02:00 committed by Jonathan Cameron
parent c278ac0ecd
commit d430f3c36c
5 changed files with 57 additions and 53 deletions
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1
drivers/iio/imu/inv_mpu6050/Kconfig
View File

@ -8,6 +8,7 @@ config INV_MPU6050_IIO
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
select I2C_MUX
select REGMAP_I2C
help
This driver supports the Invensense MPU6050 devices.
This driver can also support MPU6500 in MPU6050 compatibility mode

71
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
View File

@ -27,6 +27,11 @@
#include <linux/acpi.h>
#include "inv_mpu_iio.h"
static const struct regmap_config inv_mpu_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
/*
* this is the gyro scale translated from dynamic range plus/minus
* {250, 500, 1000, 2000} to rad/s
@ -75,11 +80,6 @@ static const struct inv_mpu6050_hw hw_info[INV_NUM_PARTS] = {
},
};
int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 d)
{
return i2c_smbus_write_i2c_block_data(st->client, reg, 1, &d);
}
/*
* The i2c read/write needs to happen in unlocked mode. As the parent
* adapter is common. If we use locked versions, it will fail as
@ -159,16 +159,15 @@ static int inv_mpu6050_deselect_bypass(struct i2c_adapter *adap,
int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask)
{
u8 d, mgmt_1;
unsigned int d, mgmt_1;
int result;
/* switch clock needs to be careful. Only when gyro is on, can
clock source be switched to gyro. Otherwise, it must be set to
internal clock */
if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) {
result = i2c_smbus_read_i2c_block_data(st->client,
st->reg->pwr_mgmt_1, 1, &mgmt_1);
if (result != 1)
result = regmap_read(st->map, st->reg->pwr_mgmt_1, &mgmt_1);
if (result)
return result;
mgmt_1 &= ~INV_MPU6050_BIT_CLK_MASK;
@ -178,20 +177,19 @@ int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask)
/* turning off gyro requires switch to internal clock first.
Then turn off gyro engine */
mgmt_1 |= INV_CLK_INTERNAL;
result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1, mgmt_1);
result = regmap_write(st->map, st->reg->pwr_mgmt_1, mgmt_1);
if (result)
return result;
}
result = i2c_smbus_read_i2c_block_data(st->client,
st->reg->pwr_mgmt_2, 1, &d);
if (result != 1)
result = regmap_read(st->map, st->reg->pwr_mgmt_2, &d);
if (result)
return result;
if (en)
d &= ~mask;
else
d |= mask;
result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_2, d);
result = regmap_write(st->map, st->reg->pwr_mgmt_2, d);
if (result)
return result;
@ -201,7 +199,7 @@ int inv_mpu6050_switch_engine(struct inv_mpu6050_state *st, bool en, u32 mask)
if (INV_MPU6050_BIT_PWR_GYRO_STBY == mask) {
/* switch internal clock to PLL */
mgmt_1 |= INV_CLK_PLL;
result = inv_mpu6050_write_reg(st,
result = regmap_write(st->map,
st->reg->pwr_mgmt_1, mgmt_1);
if (result)
return result;
@ -218,15 +216,14 @@ int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on)
if (power_on) {
/* Already under indio-dev->mlock mutex */
if (!st->powerup_count)
result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
0);
result = regmap_write(st->map, st->reg->pwr_mgmt_1, 0);
if (!result)
st->powerup_count++;
} else {
st->powerup_count--;
if (!st->powerup_count)
result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
INV_MPU6050_BIT_SLEEP);
result = regmap_write(st->map, st->reg->pwr_mgmt_1,
INV_MPU6050_BIT_SLEEP);
}
if (result)
@ -257,22 +254,22 @@ static int inv_mpu6050_init_config(struct iio_dev *indio_dev)
if (result)
return result;
d = (INV_MPU6050_FSR_2000DPS << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT);
result = inv_mpu6050_write_reg(st, st->reg->gyro_config, d);
result = regmap_write(st->map, st->reg->gyro_config, d);
if (result)
return result;
d = INV_MPU6050_FILTER_20HZ;
result = inv_mpu6050_write_reg(st, st->reg->lpf, d);
result = regmap_write(st->map, st->reg->lpf, d);
if (result)
return result;
d = INV_MPU6050_ONE_K_HZ / INV_MPU6050_INIT_FIFO_RATE - 1;
result = inv_mpu6050_write_reg(st, st->reg->sample_rate_div, d);
result = regmap_write(st->map, st->reg->sample_rate_div, d);
if (result)
return result;
d = (INV_MPU6050_FS_02G << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT);
result = inv_mpu6050_write_reg(st, st->reg->accl_config, d);
result = regmap_write(st->map, st->reg->accl_config, d);
if (result)
return result;
@ -290,9 +287,8 @@ static int inv_mpu6050_sensor_show(struct inv_mpu6050_state *st, int reg,
__be16 d;
ind = (axis - IIO_MOD_X) * 2;
result = i2c_smbus_read_i2c_block_data(st->client, reg + ind, 2,
(u8 *)&d);
if (result != 2)
result = regmap_bulk_read(st->map, reg + ind, (u8 *)&d, 2);
if (result)
return -EINVAL;
*val = (short)be16_to_cpup(&d);
@ -418,8 +414,7 @@ static int inv_mpu6050_write_gyro_scale(struct inv_mpu6050_state *st, int val)
for (i = 0; i < ARRAY_SIZE(gyro_scale_6050); ++i) {
if (gyro_scale_6050[i] == val) {
d = (i << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT);
result = inv_mpu6050_write_reg(st,
st->reg->gyro_config, d);
result = regmap_write(st->map, st->reg->gyro_config, d);
if (result)
return result;
@ -456,8 +451,7 @@ static int inv_mpu6050_write_accel_scale(struct inv_mpu6050_state *st, int val)
for (i = 0; i < ARRAY_SIZE(accel_scale); ++i) {
if (accel_scale[i] == val) {
d = (i << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT);
result = inv_mpu6050_write_reg(st,
st->reg->accl_config, d);
result = regmap_write(st->map, st->reg->accl_config, d);
if (result)
return result;
@ -537,7 +531,7 @@ static int inv_mpu6050_set_lpf(struct inv_mpu6050_state *st, int rate)
while ((h < hz[i]) && (i < ARRAY_SIZE(d) - 1))
i++;
data = d[i];
result = inv_mpu6050_write_reg(st, st->reg->lpf, data);
result = regmap_write(st->map, st->reg->lpf, data);
if (result)
return result;
st->chip_config.lpf = data;
@ -575,7 +569,7 @@ static ssize_t inv_mpu6050_fifo_rate_store(struct device *dev,
goto fifo_rate_fail;
d = INV_MPU6050_ONE_K_HZ / fifo_rate - 1;
result = inv_mpu6050_write_reg(st, st->reg->sample_rate_div, d);
result = regmap_write(st->map, st->reg->sample_rate_div, d);
if (result)
goto fifo_rate_fail;
st->chip_config.fifo_rate = fifo_rate;
@ -736,8 +730,8 @@ static int inv_check_and_setup_chip(struct inv_mpu6050_state *st)
st->reg = hw_info[st->chip_type].reg;
/* reset to make sure previous state are not there */
result = inv_mpu6050_write_reg(st, st->reg->pwr_mgmt_1,
INV_MPU6050_BIT_H_RESET);
result = regmap_write(st->map, st->reg->pwr_mgmt_1,
INV_MPU6050_BIT_H_RESET);
if (result)
return result;
msleep(INV_MPU6050_POWER_UP_TIME);
@ -778,11 +772,19 @@ static int inv_mpu_probe(struct i2c_client *client,
struct iio_dev *indio_dev;
struct inv_mpu6050_platform_data *pdata;
int result;
struct regmap *regmap;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_I2C_BLOCK))
return -ENOSYS;
regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config);
if (IS_ERR(regmap)) {
dev_err(&client->dev, "Failed to register i2c regmap %d\n",
(int)PTR_ERR(regmap));
return PTR_ERR(regmap);
}
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
if (!indio_dev)
return -ENOMEM;
@ -790,6 +792,7 @@ static int inv_mpu_probe(struct i2c_client *client,
st = iio_priv(indio_dev);
st->client = client;
st->powerup_count = 0;
st->map = regmap;
pdata = dev_get_platdata(&client->dev);
if (pdata)
st->plat_data = *pdata;

2
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
View File

@ -15,6 +15,7 @@
#include <linux/spinlock.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include <linux/regmap.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/kfifo_buf.h>
#include <linux/iio/trigger.h>
@ -125,6 +126,7 @@ struct inv_mpu6050_state {
unsigned int powerup_count;
struct inv_mpu6050_platform_data plat_data;
DECLARE_KFIFO(timestamps, long long, TIMESTAMP_FIFO_SIZE);
struct regmap *map;
};
/*register and associated bit definition*/

30
drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
View File

@ -13,7 +13,6 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/sysfs.h>
@ -41,22 +40,22 @@ int inv_reset_fifo(struct iio_dev *indio_dev)
struct inv_mpu6050_state *st = iio_priv(indio_dev);
/* disable interrupt */
result = inv_mpu6050_write_reg(st, st->reg->int_enable, 0);
result = regmap_write(st->map, st->reg->int_enable, 0);
if (result) {
dev_err(&st->client->dev, "int_enable failed %d\n", result);
return result;
}
/* disable the sensor output to FIFO */
result = inv_mpu6050_write_reg(st, st->reg->fifo_en, 0);
result = regmap_write(st->map, st->reg->fifo_en, 0);
if (result)
goto reset_fifo_fail;
/* disable fifo reading */
result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, 0);
result = regmap_write(st->map, st->reg->user_ctrl, 0);
if (result)
goto reset_fifo_fail;
/* reset FIFO*/
result = inv_mpu6050_write_reg(st, st->reg->user_ctrl,
result = regmap_write(st->map, st->reg->user_ctrl,
INV_MPU6050_BIT_FIFO_RST);
if (result)
goto reset_fifo_fail;
@ -67,13 +66,13 @@ int inv_reset_fifo(struct iio_dev *indio_dev)
/* enable interrupt */
if (st->chip_config.accl_fifo_enable ||
st->chip_config.gyro_fifo_enable) {
result = inv_mpu6050_write_reg(st, st->reg->int_enable,
result = regmap_write(st->map, st->reg->int_enable,
INV_MPU6050_BIT_DATA_RDY_EN);
if (result)
return result;
}
/* enable FIFO reading and I2C master interface*/
result = inv_mpu6050_write_reg(st, st->reg->user_ctrl,
result = regmap_write(st->map, st->reg->user_ctrl,
INV_MPU6050_BIT_FIFO_EN);
if (result)
goto reset_fifo_fail;
@ -83,7 +82,7 @@ int inv_reset_fifo(struct iio_dev *indio_dev)
d |= INV_MPU6050_BITS_GYRO_OUT;
if (st->chip_config.accl_fifo_enable)
d |= INV_MPU6050_BIT_ACCEL_OUT;
result = inv_mpu6050_write_reg(st, st->reg->fifo_en, d);
result = regmap_write(st->map, st->reg->fifo_en, d);
if (result)
goto reset_fifo_fail;
@ -91,7 +90,7 @@ int inv_reset_fifo(struct iio_dev *indio_dev)
reset_fifo_fail:
dev_err(&st->client->dev, "reset fifo failed %d\n", result);
result = inv_mpu6050_write_reg(st, st->reg->int_enable,
result = regmap_write(st->map, st->reg->int_enable,
INV_MPU6050_BIT_DATA_RDY_EN);
return result;
@ -143,10 +142,10 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p)
* read fifo_count register to know how many bytes inside FIFO
* right now
*/
result = i2c_smbus_read_i2c_block_data(st->client,
result = regmap_bulk_read(st->map,
st->reg->fifo_count_h,
INV_MPU6050_FIFO_COUNT_BYTE, data);
if (result != INV_MPU6050_FIFO_COUNT_BYTE)
data, INV_MPU6050_FIFO_COUNT_BYTE);
if (result)
goto end_session;
fifo_count = be16_to_cpup((__be16 *)(&data[0]));
if (fifo_count < bytes_per_datum)
@ -161,10 +160,9 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p)
fifo_count / bytes_per_datum + INV_MPU6050_TIME_STAMP_TOR)
goto flush_fifo;
while (fifo_count >= bytes_per_datum) {
result = i2c_smbus_read_i2c_block_data(st->client,
st->reg->fifo_r_w,
bytes_per_datum, data);
if (result != bytes_per_datum)
result = regmap_bulk_read(st->map, st->reg->fifo_r_w,
data, bytes_per_datum);
if (result)
goto flush_fifo;
result = kfifo_out(&st->timestamps, &timestamp, 1);

6
drivers/iio/imu/inv_mpu6050/inv_mpu_trigger.c
View File

@ -65,15 +65,15 @@ static int inv_mpu6050_set_enable(struct iio_dev *indio_dev, bool enable)
if (result)
return result;
} else {
result = inv_mpu6050_write_reg(st, st->reg->fifo_en, 0);
result = regmap_write(st->map, st->reg->fifo_en, 0);
if (result)
return result;
result = inv_mpu6050_write_reg(st, st->reg->int_enable, 0);
result = regmap_write(st->map, st->reg->int_enable, 0);
if (result)
return result;
result = inv_mpu6050_write_reg(st, st->reg->user_ctrl, 0);
result = regmap_write(st->map, st->reg->user_ctrl, 0);
if (result)
return result;