diff options
Diffstat (limited to 'drivers/iio/accel/st_accel_core.c')
| -rw-r--r-- | drivers/iio/accel/st_accel_core.c | 725 |
1 files changed, 635 insertions, 90 deletions
diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c index f7b471121508..a7961c610ed2 100644 --- a/drivers/iio/accel/st_accel_core.c +++ b/drivers/iio/accel/st_accel_core.c @@ -1,27 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * STMicroelectronics accelerometers driver * * Copyright 2012-2013 STMicroelectronics Inc. * * Denis Ciocca <denis.ciocca@st.com> - * - * Licensed under the GPL-2. */ #include <linux/kernel.h> #include <linux/module.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/types.h> #include <linux/mutex.h> -#include <linux/interrupt.h> -#include <linux/i2c.h> -#include <linux/gpio.h> -#include <linux/irq.h> +#include <linux/sysfs.h> +#include <linux/slab.h> +#include <linux/acpi.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger.h> -#include <linux/iio/buffer.h> #include <linux/iio/common/st_sensors.h> #include "st_accel.h" @@ -43,51 +37,74 @@ #define ST_ACCEL_FS_AVL_200G 200 #define ST_ACCEL_FS_AVL_400G 400 +static const struct iio_mount_matrix * +st_accel_get_mount_matrix(const struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct st_sensor_data *adata = iio_priv(indio_dev); + + return &adata->mount_matrix; +} + +static const struct iio_chan_spec_ext_info st_accel_mount_matrix_ext_info[] = { + IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, st_accel_get_mount_matrix), + { } +}; + static const struct iio_chan_spec st_accel_8bit_channels[] = { - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 8, 8, - ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1), - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_ACCEL_DEFAULT_OUT_X_L_ADDR+1, + st_accel_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 8, 8, - ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1), - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_ACCEL_DEFAULT_OUT_Y_L_ADDR+1, + st_accel_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 8, 8, - ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1), + ST_ACCEL_DEFAULT_OUT_Z_L_ADDR+1, + st_accel_mount_matrix_ext_info), IIO_CHAN_SOFT_TIMESTAMP(3) }; static const struct iio_chan_spec st_accel_12bit_channels[] = { - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 12, 16, - ST_ACCEL_DEFAULT_OUT_X_L_ADDR), - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_ACCEL_DEFAULT_OUT_X_L_ADDR, + st_accel_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 12, 16, - ST_ACCEL_DEFAULT_OUT_Y_L_ADDR), - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_ACCEL_DEFAULT_OUT_Y_L_ADDR, + st_accel_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 12, 16, - ST_ACCEL_DEFAULT_OUT_Z_L_ADDR), + ST_ACCEL_DEFAULT_OUT_Z_L_ADDR, + st_accel_mount_matrix_ext_info), IIO_CHAN_SOFT_TIMESTAMP(3) }; static const struct iio_chan_spec st_accel_16bit_channels[] = { - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16, - ST_ACCEL_DEFAULT_OUT_X_L_ADDR), - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_ACCEL_DEFAULT_OUT_X_L_ADDR, + st_accel_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16, - ST_ACCEL_DEFAULT_OUT_Y_L_ADDR), - ST_SENSORS_LSM_CHANNELS(IIO_ACCEL, + ST_ACCEL_DEFAULT_OUT_Y_L_ADDR, + st_accel_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(IIO_ACCEL, BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16, - ST_ACCEL_DEFAULT_OUT_Z_L_ADDR), + ST_ACCEL_DEFAULT_OUT_Z_L_ADDR, + st_accel_mount_matrix_ext_info), IIO_CHAN_SOFT_TIMESTAMP(3) }; @@ -427,6 +444,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = { .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, .sensors_supported = { [0] = LIS331DL_ACCEL_DEV_NAME, + [1] = LIS302DL_ACCEL_DEV_NAME, }, .ch = (struct iio_chan_spec *)st_accel_8bit_channels, .odr = { @@ -499,6 +517,7 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = { .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, .sensors_supported = { [0] = H3LIS331DL_ACCEL_DEV_NAME, + [1] = IIS328DQ_ACCEL_DEV_NAME, }, .ch = (struct iio_chan_spec *)st_accel_12bit_channels, .odr = { @@ -830,6 +849,417 @@ static const struct st_sensor_settings st_accel_sensors_settings[] = { .multi_read_bit = false, .bootime = 2, }, + { + .wai = 0x33, + .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, + .sensors_supported = { + [0] = LIS2DE12_ACCEL_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_accel_8bit_channels, + .odr = { + .addr = 0x20, + .mask = 0xf0, + .odr_avl = { + { .hz = 1, .value = 0x01, }, + { .hz = 10, .value = 0x02, }, + { .hz = 25, .value = 0x03, }, + { .hz = 50, .value = 0x04, }, + { .hz = 100, .value = 0x05, }, + { .hz = 200, .value = 0x06, }, + { .hz = 400, .value = 0x07, }, + { .hz = 1620, .value = 0x08, }, + { .hz = 5376, .value = 0x09, }, + }, + }, + .pw = { + .addr = 0x20, + .mask = 0xf0, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = 0x23, + .mask = 0x30, + .fs_avl = { + [0] = { + .num = ST_ACCEL_FS_AVL_2G, + .value = 0x00, + .gain = IIO_G_TO_M_S_2(15600), + }, + [1] = { + .num = ST_ACCEL_FS_AVL_4G, + .value = 0x01, + .gain = IIO_G_TO_M_S_2(31200), + }, + [2] = { + .num = ST_ACCEL_FS_AVL_8G, + .value = 0x02, + .gain = IIO_G_TO_M_S_2(62500), + }, + [3] = { + .num = ST_ACCEL_FS_AVL_16G, + .value = 0x03, + .gain = IIO_G_TO_M_S_2(187500), + }, + }, + }, + .drdy_irq = { + .int1 = { + .addr = 0x22, + .mask = 0x10, + }, + .addr_ihl = 0x25, + .mask_ihl = 0x02, + .stat_drdy = { + .addr = ST_SENSORS_DEFAULT_STAT_ADDR, + .mask = 0x07, + }, + }, + .sim = { + .addr = 0x23, + .value = BIT(0), + }, + .multi_read_bit = true, + .bootime = 2, + }, + { + .wai = 0x43, + .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, + .sensors_supported = { + [0] = LIS2DS12_ACCEL_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_accel_16bit_channels, + .odr = { + .addr = 0x20, + .mask = 0xf0, + .odr_avl = { + { .hz = 10, .value = 0x01, }, + { .hz = 50, .value = 0x02, }, + { .hz = 100, .value = 0x03, }, + { .hz = 200, .value = 0x04, }, + { .hz = 400, .value = 0x05, }, + { .hz = 800, .value = 0x06, }, + }, + }, + .pw = { + .addr = 0x20, + .mask = 0xf0, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = 0x20, + .mask = 0x0c, + .fs_avl = { + [0] = { + .num = ST_ACCEL_FS_AVL_2G, + .value = 0x00, + .gain = IIO_G_TO_M_S_2(61), + }, + [1] = { + .num = ST_ACCEL_FS_AVL_4G, + .value = 0x02, + .gain = IIO_G_TO_M_S_2(122), + }, + [2] = { + .num = ST_ACCEL_FS_AVL_8G, + .value = 0x03, + .gain = IIO_G_TO_M_S_2(244), + }, + [3] = { + .num = ST_ACCEL_FS_AVL_16G, + .value = 0x01, + .gain = IIO_G_TO_M_S_2(488), + }, + }, + }, + .bdu = { + .addr = 0x20, + .mask = 0x01, + }, + .drdy_irq = { + .int1 = { + .addr = 0x23, + .mask = 0x01, + }, + .int2 = { + .addr = 0x24, + .mask = 0x01, + }, + .addr_ihl = 0x22, + .mask_ihl = 0x02, + .stat_drdy = { + .addr = ST_SENSORS_DEFAULT_STAT_ADDR, + .mask = 0x01, + }, + }, + .sim = { + .addr = 0x21, + .value = BIT(0), + }, + .multi_read_bit = true, + .bootime = 2, + }, + { + .wai = 0x41, + .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, + .sensors_supported = { + [0] = LIS2HH12_ACCEL_DEV_NAME, + [1] = LSM303C_ACCEL_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_accel_16bit_channels, + .odr = { + .addr = 0x20, + .mask = 0x70, + .odr_avl = { + { .hz = 10, .value = 0x01, }, + { .hz = 50, .value = 0x02, }, + { .hz = 100, .value = 0x03, }, + { .hz = 200, .value = 0x04, }, + { .hz = 400, .value = 0x05, }, + { .hz = 800, .value = 0x06, }, + }, + }, + .pw = { + .addr = 0x20, + .mask = 0x70, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = 0x23, + .mask = 0x30, + .fs_avl = { + [0] = { + .num = ST_ACCEL_FS_AVL_2G, + .value = 0x00, + .gain = IIO_G_TO_M_S_2(61), + }, + [1] = { + .num = ST_ACCEL_FS_AVL_4G, + .value = 0x02, + .gain = IIO_G_TO_M_S_2(122), + }, + [2] = { + .num = ST_ACCEL_FS_AVL_8G, + .value = 0x03, + .gain = IIO_G_TO_M_S_2(244), + }, + }, + }, + .bdu = { + .addr = 0x20, + .mask = 0x08, + }, + .drdy_irq = { + .int1 = { + .addr = 0x22, + .mask = 0x01, + }, + .int2 = { + .addr = 0x25, + .mask = 0x01, + }, + .addr_ihl = 0x24, + .mask_ihl = 0x02, + .stat_drdy = { + .addr = ST_SENSORS_DEFAULT_STAT_ADDR, + .mask = 0x07, + }, + }, + .sim = { + .addr = 0x23, + .value = BIT(0), + }, + .multi_read_bit = true, + .bootime = 2, + }, + { + .wai = 0x49, + .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, + .sensors_supported = { + [0] = LSM9DS0_IMU_DEV_NAME, + [1] = LSM303D_IMU_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_accel_16bit_channels, + .odr = { + .addr = 0x20, + .mask = GENMASK(7, 4), + .odr_avl = { + { 3, 0x01, }, + { 6, 0x02, }, + { 12, 0x03, }, + { 25, 0x04, }, + { 50, 0x05, }, + { 100, 0x06, }, + { 200, 0x07, }, + { 400, 0x08, }, + { 800, 0x09, }, + { 1600, 0x0a, }, + }, + }, + .pw = { + .addr = 0x20, + .mask = GENMASK(7, 4), + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = 0x21, + .mask = GENMASK(5, 3), + .fs_avl = { + [0] = { + .num = ST_ACCEL_FS_AVL_2G, + .value = 0x00, + .gain = IIO_G_TO_M_S_2(61), + }, + [1] = { + .num = ST_ACCEL_FS_AVL_4G, + .value = 0x01, + .gain = IIO_G_TO_M_S_2(122), + }, + [2] = { + .num = ST_ACCEL_FS_AVL_6G, + .value = 0x02, + .gain = IIO_G_TO_M_S_2(183), + }, + [3] = { + .num = ST_ACCEL_FS_AVL_8G, + .value = 0x03, + .gain = IIO_G_TO_M_S_2(244), + }, + [4] = { + .num = ST_ACCEL_FS_AVL_16G, + .value = 0x04, + .gain = IIO_G_TO_M_S_2(732), + }, + }, + }, + .bdu = { + .addr = 0x20, + .mask = BIT(3), + }, + .drdy_irq = { + .int1 = { + .addr = 0x22, + .mask = BIT(2), + }, + .int2 = { + .addr = 0x23, + .mask = BIT(3), + }, + .stat_drdy = { + .addr = ST_SENSORS_DEFAULT_STAT_ADDR, + .mask = GENMASK(2, 0), + }, + }, + .sim = { + .addr = 0x21, + .value = BIT(0), + }, + .multi_read_bit = true, + .bootime = 2, + }, + { + /* + * Not an ST part. Register-compatible with the LIS2DH, even + * though the WAI value is different. + */ + .wai = 0x11, + .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, + .sensors_supported = { + [0] = SC7A20_ACCEL_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_accel_12bit_channels, + .odr = { + .addr = 0x20, + .mask = 0xf0, + .odr_avl = { + { .hz = 1, .value = 0x01, }, + { .hz = 10, .value = 0x02, }, + { .hz = 25, .value = 0x03, }, + { .hz = 50, .value = 0x04, }, + { .hz = 100, .value = 0x05, }, + { .hz = 200, .value = 0x06, }, + { .hz = 400, .value = 0x07, }, + { .hz = 1600, .value = 0x08, }, + }, + }, + .pw = { + .addr = 0x20, + .mask = 0xf0, + .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE, + }, + .enable_axis = { + .addr = ST_SENSORS_DEFAULT_AXIS_ADDR, + .mask = ST_SENSORS_DEFAULT_AXIS_MASK, + }, + .fs = { + .addr = 0x23, + .mask = 0x30, + .fs_avl = { + [0] = { + .num = ST_ACCEL_FS_AVL_2G, + .value = 0x00, + .gain = IIO_G_TO_M_S_2(1000), + }, + [1] = { + .num = ST_ACCEL_FS_AVL_4G, + .value = 0x01, + .gain = IIO_G_TO_M_S_2(2000), + }, + [2] = { + .num = ST_ACCEL_FS_AVL_8G, + .value = 0x02, + .gain = IIO_G_TO_M_S_2(4000), + }, + [3] = { + .num = ST_ACCEL_FS_AVL_16G, + .value = 0x03, + .gain = IIO_G_TO_M_S_2(12000), + }, + }, + }, + .bdu = { + .addr = 0x23, + .mask = 0x80, + }, + .drdy_irq = { + .int1 = { + .addr = 0x22, + .mask = 0x10, + }, + .addr_ihl = 0x25, + .mask_ihl = 0x02, + .stat_drdy = { + .addr = ST_SENSORS_DEFAULT_STAT_ADDR, + .mask = 0x07, + }, + }, + .sim = { + .addr = 0x23, + .value = BIT(0), + }, + .multi_read_bit = true, + .bootime = 2, + }, +}; + +/* Default accel DRDY is available on INT1 pin */ +static const struct st_sensors_platform_data default_accel_pdata = { + .drdy_int_pin = 1, }; static int st_accel_read_raw(struct iio_dev *indio_dev, @@ -864,28 +1294,21 @@ read_error: static int st_accel_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { - int err; - switch (mask) { case IIO_CHAN_INFO_SCALE: { int gain; gain = val * 1000000 + val2; - err = st_sensors_set_fullscale_by_gain(indio_dev, gain); - break; + return st_sensors_set_fullscale_by_gain(indio_dev, gain); } case IIO_CHAN_INFO_SAMP_FREQ: if (val2) return -EINVAL; - mutex_lock(&indio_dev->mlock); - err = st_sensors_set_odr(indio_dev, val); - mutex_unlock(&indio_dev->mlock); - return err; + + return st_sensors_set_odr(indio_dev, val); default: return -EINVAL; } - - return err; } static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL(); @@ -918,35 +1341,187 @@ static const struct iio_trigger_ops st_accel_trigger_ops = { #define ST_ACCEL_TRIGGER_OPS NULL #endif +#ifdef CONFIG_ACPI +/* Read ST-specific _ONT orientation data from ACPI and generate an + * appropriate mount matrix. + */ +static int apply_acpi_orientation(struct iio_dev *indio_dev) +{ + struct st_sensor_data *adata = iio_priv(indio_dev); + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; + struct acpi_device *adev; + union acpi_object *ont; + union acpi_object *elements; + acpi_status status; + struct device *parent = indio_dev->dev.parent; + int ret = -EINVAL; + unsigned int val; + int i, j; + int final_ont[3][3] = { { 0 }, }; + + /* For some reason, ST's _ONT translation does not apply directly + * to the data read from the sensor. Another translation must be + * performed first, as described by the matrix below. Perhaps + * ST required this specific translation for the first product + * where the device was mounted? + */ + const int default_ont[3][3] = { + { 0, 1, 0 }, + { -1, 0, 0 }, + { 0, 0, -1 }, + }; + + + adev = ACPI_COMPANION(parent); + if (!adev) + return -ENXIO; + + /* Read _ONT data, which should be a package of 6 integers. */ + status = acpi_evaluate_object(adev->handle, "_ONT", NULL, &buffer); + if (status == AE_NOT_FOUND) { + return -ENXIO; + } else if (ACPI_FAILURE(status)) { + dev_warn(parent, "failed to execute _ONT: %d\n", status); + return status; + } + + ont = buffer.pointer; + if (ont->type != ACPI_TYPE_PACKAGE || ont->package.count != 6) + goto out; + + /* The first 3 integers provide axis order information. + * e.g. 0 1 2 would indicate normal X,Y,Z ordering. + * e.g. 1 0 2 indicates that data arrives in order Y,X,Z. + */ + elements = ont->package.elements; + for (i = 0; i < 3; i++) { + if (elements[i].type != ACPI_TYPE_INTEGER) + goto out; + + val = elements[i].integer.value; + if (val > 2) + goto out; + + /* Avoiding full matrix multiplication, we simply reorder the + * columns in the default_ont matrix according to the + * ordering provided by _ONT. + */ + final_ont[0][i] = default_ont[0][val]; + final_ont[1][i] = default_ont[1][val]; + final_ont[2][i] = default_ont[2][val]; + } + + /* The final 3 integers provide sign flip information. + * 0 means no change, 1 means flip. + * e.g. 0 0 1 means that Z data should be sign-flipped. + * This is applied after the axis reordering from above. + */ + elements += 3; + for (i = 0; i < 3; i++) { + if (elements[i].type != ACPI_TYPE_INTEGER) + goto out; + + val = elements[i].integer.value; + if (val != 0 && val != 1) + goto out; + if (!val) + continue; + + /* Flip the values in the indicated column */ + final_ont[0][i] *= -1; + final_ont[1][i] *= -1; + final_ont[2][i] *= -1; + } + + /* Convert our integer matrix to a string-based iio_mount_matrix */ + for (i = 0; i < 3; i++) { + for (j = 0; j < 3; j++) { + int matrix_val = final_ont[i][j]; + char *str_value; + + switch (matrix_val) { + case -1: + str_value = "-1"; + break; + case 0: + str_value = "0"; + break; + case 1: + str_value = "1"; + break; + default: + goto out; + } + adata->mount_matrix.rotation[i * 3 + j] = str_value; + } + } + + ret = 0; + dev_info(parent, "computed mount matrix from ACPI\n"); + +out: + kfree(buffer.pointer); + if (ret) + dev_dbg(parent, + "failed to apply ACPI orientation data: %d\n", ret); + + return ret; +} +#else /* !CONFIG_ACPI */ +static int apply_acpi_orientation(struct iio_dev *indio_dev) +{ + return -EINVAL; +} +#endif + +/* + * st_accel_get_settings() - get sensor settings from device name + * @name: device name buffer reference. + * + * Return: valid reference on success, NULL otherwise. + */ +const struct st_sensor_settings *st_accel_get_settings(const char *name) +{ + int index = st_sensors_get_settings_index(name, + st_accel_sensors_settings, + ARRAY_SIZE(st_accel_sensors_settings)); + if (index < 0) + return NULL; + + return &st_accel_sensors_settings[index]; +} +EXPORT_SYMBOL_NS(st_accel_get_settings, "IIO_ST_SENSORS"); + int st_accel_common_probe(struct iio_dev *indio_dev) { struct st_sensor_data *adata = iio_priv(indio_dev); - struct st_sensors_platform_data *pdata = - (struct st_sensors_platform_data *)adata->dev->platform_data; - int irq = adata->get_irq_data_ready(indio_dev); + struct device *parent = indio_dev->dev.parent; + struct st_sensors_platform_data *pdata = dev_get_platdata(parent); int err; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &accel_info; - mutex_init(&adata->tb.buf_lock); - err = st_sensors_power_enable(indio_dev); - if (err) - return err; - - err = st_sensors_check_device_support(indio_dev, - ARRAY_SIZE(st_accel_sensors_settings), - st_accel_sensors_settings); + err = st_sensors_verify_id(indio_dev); if (err < 0) - goto st_accel_power_off; + return err; adata->num_data_channels = ST_ACCEL_NUMBER_DATA_CHANNELS; - adata->multiread_bit = adata->sensor_settings->multi_read_bit; indio_dev->channels = adata->sensor_settings->ch; indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; - adata->current_fullscale = (struct st_sensor_fullscale_avl *) - &adata->sensor_settings->fs.fs_avl[0]; + /* + * First try specific ACPI methods to retrieve orientation then try the + * generic function. + */ + err = apply_acpi_orientation(indio_dev); + if (err) { + err = iio_read_mount_matrix(parent, &adata->mount_matrix); + if (err) + return err; + } + + adata->current_fullscale = &adata->sensor_settings->fs.fs_avl[0]; adata->odr = adata->sensor_settings->odr.odr_avl[0].hz; if (!pdata) @@ -954,54 +1529,24 @@ int st_accel_common_probe(struct iio_dev *indio_dev) err = st_sensors_init_sensor(indio_dev, pdata); if (err < 0) - goto st_accel_power_off; + return err; err = st_accel_allocate_ring(indio_dev); if (err < 0) - goto st_accel_power_off; + return err; - if (irq > 0) { + if (adata->irq > 0) { err = st_sensors_allocate_trigger(indio_dev, ST_ACCEL_TRIGGER_OPS); if (err < 0) - goto st_accel_probe_trigger_error; + return err; } - err = iio_device_register(indio_dev); - if (err) - goto st_accel_device_register_error; - - dev_info(&indio_dev->dev, "registered accelerometer %s\n", - indio_dev->name); - - return 0; - -st_accel_device_register_error: - if (irq > 0) - st_sensors_deallocate_trigger(indio_dev); -st_accel_probe_trigger_error: - st_accel_deallocate_ring(indio_dev); -st_accel_power_off: - st_sensors_power_disable(indio_dev); - - return err; -} -EXPORT_SYMBOL(st_accel_common_probe); - -void st_accel_common_remove(struct iio_dev *indio_dev) -{ - struct st_sensor_data *adata = iio_priv(indio_dev); - - st_sensors_power_disable(indio_dev); - - iio_device_unregister(indio_dev); - if (adata->get_irq_data_ready(indio_dev) > 0) - st_sensors_deallocate_trigger(indio_dev); - - st_accel_deallocate_ring(indio_dev); + return devm_iio_device_register(parent, indio_dev); } -EXPORT_SYMBOL(st_accel_common_remove); +EXPORT_SYMBOL_NS(st_accel_common_probe, "IIO_ST_SENSORS"); MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); MODULE_DESCRIPTION("STMicroelectronics accelerometers driver"); MODULE_LICENSE("GPL v2"); +MODULE_IMPORT_NS("IIO_ST_SENSORS"); |