From: Octavian Purdila Date: Sat, 31 Jan 2015 00:00:04 +0000 (+0200) Subject: iio: bmc150: refactor interrupt enabling X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8e22f477e1432ace88b762f5f66e0f96631a1462;p=linux-beck.git iio: bmc150: refactor interrupt enabling This patch combines the any motion and new data interrupts function into a single, generic, interrupt enable function. On top of this, we can later refactor triggers to make it easier to add new triggers. Signed-off-by: Octavian Purdila Acked-by: Srinivas Pandruvada Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c index 2b6b80d700e4..087392514e54 100644 --- a/drivers/iio/accel/bmc150-accel.c +++ b/drivers/iio/accel/bmc150-accel.c @@ -359,137 +359,6 @@ static int bmc150_accel_chip_init(struct bmc150_accel_data *data) return 0; } -static int bmc150_accel_setup_any_motion_interrupt( - struct bmc150_accel_data *data, - bool status) -{ - int ret; - - /* Enable/Disable INT1 mapping */ - ret = i2c_smbus_read_byte_data(data->client, - BMC150_ACCEL_REG_INT_MAP_0); - if (ret < 0) { - dev_err(&data->client->dev, "Error reading reg_int_map_0\n"); - return ret; - } - if (status) - ret |= BMC150_ACCEL_INT_MAP_0_BIT_SLOPE; - else - ret &= ~BMC150_ACCEL_INT_MAP_0_BIT_SLOPE; - - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_MAP_0, - ret); - if (ret < 0) { - dev_err(&data->client->dev, "Error writing reg_int_map_0\n"); - return ret; - } - - if (status) { - /* - * New data interrupt is always non-latched, - * which will have higher priority, so no need - * to set latched mode, we will be flooded anyway with INTR - */ - if (!data->dready_trigger_on) { - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_RST_LATCH, - BMC150_ACCEL_INT_MODE_LATCH_INT | - BMC150_ACCEL_INT_MODE_LATCH_RESET); - if (ret < 0) { - dev_err(&data->client->dev, - "Error writing reg_int_rst_latch\n"); - return ret; - } - } - - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_EN_0, - BMC150_ACCEL_INT_EN_BIT_SLP_X | - BMC150_ACCEL_INT_EN_BIT_SLP_Y | - BMC150_ACCEL_INT_EN_BIT_SLP_Z); - } else - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_EN_0, - 0); - - if (ret < 0) { - dev_err(&data->client->dev, "Error writing reg_int_en_0\n"); - return ret; - } - - return 0; -} - -static int bmc150_accel_setup_new_data_interrupt(struct bmc150_accel_data *data, - bool status) -{ - int ret; - - /* Enable/Disable INT1 mapping */ - ret = i2c_smbus_read_byte_data(data->client, - BMC150_ACCEL_REG_INT_MAP_1); - if (ret < 0) { - dev_err(&data->client->dev, "Error reading reg_int_map_1\n"); - return ret; - } - if (status) - ret |= BMC150_ACCEL_INT_MAP_1_BIT_DATA; - else - ret &= ~BMC150_ACCEL_INT_MAP_1_BIT_DATA; - - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_MAP_1, - ret); - if (ret < 0) { - dev_err(&data->client->dev, "Error writing reg_int_map_1\n"); - return ret; - } - - if (status) { - /* - * Set non latched mode interrupt and clear any latched - * interrupt - */ - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_RST_LATCH, - BMC150_ACCEL_INT_MODE_NON_LATCH_INT | - BMC150_ACCEL_INT_MODE_LATCH_RESET); - if (ret < 0) { - dev_err(&data->client->dev, - "Error writing reg_int_rst_latch\n"); - return ret; - } - - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_EN_1, - BMC150_ACCEL_INT_EN_BIT_DATA_EN); - - } else { - /* Restore default interrupt mode */ - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_RST_LATCH, - BMC150_ACCEL_INT_MODE_LATCH_INT | - BMC150_ACCEL_INT_MODE_LATCH_RESET); - if (ret < 0) { - dev_err(&data->client->dev, - "Error writing reg_int_rst_latch\n"); - return ret; - } - - ret = i2c_smbus_write_byte_data(data->client, - BMC150_ACCEL_REG_INT_EN_1, - 0); - } - - if (ret < 0) { - dev_err(&data->client->dev, "Error writing reg_int_en_1\n"); - return ret; - } - - return 0; -} - static int bmc150_accel_get_bw(struct bmc150_accel_data *data, int *val, int *val2) { @@ -547,6 +416,105 @@ static int bmc150_accel_set_power_state(struct bmc150_accel_data *data, bool on) } #endif +static const struct bmc150_accel_interrupt_info { + u8 map_reg; + u8 map_bitmask; + u8 en_reg; + u8 en_bitmask; +} bmc150_accel_interrupts[] = { + { /* data ready interrupt */ + .map_reg = BMC150_ACCEL_REG_INT_MAP_1, + .map_bitmask = BMC150_ACCEL_INT_MAP_1_BIT_DATA, + .en_reg = BMC150_ACCEL_REG_INT_EN_1, + .en_bitmask = BMC150_ACCEL_INT_EN_BIT_DATA_EN, + }, + { /* motion interrupt */ + .map_reg = BMC150_ACCEL_REG_INT_MAP_0, + .map_bitmask = BMC150_ACCEL_INT_MAP_0_BIT_SLOPE, + .en_reg = BMC150_ACCEL_REG_INT_EN_0, + .en_bitmask = BMC150_ACCEL_INT_EN_BIT_SLP_X | + BMC150_ACCEL_INT_EN_BIT_SLP_Y | + BMC150_ACCEL_INT_EN_BIT_SLP_Z + }, +}; + +static int bmc150_accel_set_interrupt(struct bmc150_accel_data *data, + const struct bmc150_accel_interrupt_info *info, + bool state) +{ + int ret; + + /* + * We will expect the enable and disable to do operation in + * in reverse order. This will happen here anyway as our + * resume operation uses sync mode runtime pm calls, the + * suspend operation will be delayed by autosuspend delay + * So the disable operation will still happen in reverse of + * enable operation. When runtime pm is disabled the mode + * is always on so sequence doesn't matter + */ + ret = bmc150_accel_set_power_state(data, state); + if (ret < 0) + return ret; + + /* map the interrupt to the appropriate pins */ + ret = i2c_smbus_read_byte_data(data->client, info->map_reg); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_int_map\n"); + goto out_fix_power_state; + } + if (state) + ret |= info->map_bitmask; + else + ret &= ~info->map_bitmask; + + ret = i2c_smbus_write_byte_data(data->client, info->map_reg, + ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_int_map\n"); + goto out_fix_power_state; + } + + /* enable/disable the interrupt */ + ret = i2c_smbus_read_byte_data(data->client, info->en_reg); + if (ret < 0) { + dev_err(&data->client->dev, "Error reading reg_int_en\n"); + goto out_fix_power_state; + } + + if (state) + ret |= info->en_bitmask; + else + ret &= ~info->en_bitmask; + + ret = i2c_smbus_write_byte_data(data->client, info->en_reg, ret); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_int_en\n"); + goto out_fix_power_state; + } + + return 0; + +out_fix_power_state: + bmc150_accel_set_power_state(data, false); + return ret; +} + +static int bmc150_accel_setup_any_motion_interrupt( + struct bmc150_accel_data *data, + bool status) +{ + return bmc150_accel_set_interrupt(data, &bmc150_accel_interrupts[1], + status); +} + +static int bmc150_accel_setup_new_data_interrupt(struct bmc150_accel_data *data, + bool status) +{ + return bmc150_accel_set_interrupt(data, &bmc150_accel_interrupts[0], + status); +} + static int bmc150_accel_set_scale(struct bmc150_accel_data *data, int val) { int ret, i; @@ -791,25 +759,8 @@ static int bmc150_accel_write_event_config(struct iio_dev *indio_dev, return 0; } - /* - * We will expect the enable and disable to do operation in - * in reverse order. This will happen here anyway as our - * resume operation uses sync mode runtime pm calls, the - * suspend operation will be delayed by autosuspend delay - * So the disable operation will still happen in reverse of - * enable operation. When runtime pm is disabled the mode - * is always on so sequence doesn't matter - */ - - ret = bmc150_accel_set_power_state(data, state); - if (ret < 0) { - mutex_unlock(&data->mutex); - return ret; - } - ret = bmc150_accel_setup_any_motion_interrupt(data, state); if (ret < 0) { - bmc150_accel_set_power_state(data, false); mutex_unlock(&data->mutex); return ret; } @@ -1039,16 +990,6 @@ static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig, return 0; } - /* - * Refer to comment in bmc150_accel_write_event_config for - * enable/disable operation order - */ - ret = bmc150_accel_set_power_state(data, state); - if (ret < 0) { - mutex_unlock(&data->mutex); - return ret; - } - if (data->motion_trig == trig) { ret = bmc150_accel_update_slope(data); if (!ret) @@ -1058,7 +999,6 @@ static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig, ret = bmc150_accel_setup_new_data_interrupt(data, state); } if (ret < 0) { - bmc150_accel_set_power_state(data, false); mutex_unlock(&data->mutex); return ret; } @@ -1244,6 +1184,20 @@ static int bmc150_accel_probe(struct i2c_client *client, if (ret) return ret; + /* + * Set latched mode interrupt. While certain interrupts are + * non-latched regardless of this settings (e.g. new data) we + * want to use latch mode when we can to prevent interrupt + * flooding. + */ + ret = i2c_smbus_write_byte_data(data->client, + BMC150_ACCEL_REG_INT_RST_LATCH, + BMC150_ACCEL_INT_MODE_LATCH_RESET); + if (ret < 0) { + dev_err(&data->client->dev, "Error writing reg_int_rst_latch\n"); + return ret; + } + data->dready_trig = devm_iio_trigger_alloc(&client->dev, "%s-dev%d", indio_dev->name,