iio: accell: mma8452: Reduce sleep time when data not ready (a45d1238) · Commits · 戴 / test

drivers/iio/accel/mma8452.c

+23 −1

Original line number	Diff line number	Diff line
		@@ -106,6 +106,7 @@ struct mma8452_data {
		u8 ctrl_reg1;
		u8 data_cfg;
		const struct mma_chip_info *chip_info;
		int sleep_val;
		};

		/**
		@@ -193,6 +194,10 @@ static int mma8452_drdy(struct mma8452_data *data)
		if ((ret & MMA8452_STATUS_DRDY) == MMA8452_STATUS_DRDY)
		return 0;

		if (data->sleep_val <= 20)
		usleep_range(data->sleep_val * 250,
		data->sleep_val * 500);
		else
		msleep(20);
		}

		@@ -544,6 +549,18 @@ static int mma8452_read_raw(struct iio_dev *indio_dev,
		return -EINVAL;
		}

		static int mma8452_calculate_sleep(struct mma8452_data *data)
		{
		int ret, i = mma8452_get_odr_index(data);

		if (mma8452_samp_freq[i][0] > 0)
		ret = 1000 / mma8452_samp_freq[i][0];
		else
		ret = 1000;

		return ret == 0 ? 1 : ret;
		}

		static int mma8452_standby(struct mma8452_data *data)
		{
		return i2c_smbus_write_byte_data(data->client, MMA8452_CTRL_REG1,
		@@ -700,6 +717,8 @@ static int mma8452_write_raw(struct iio_dev *indio_dev,
		data->ctrl_reg1 &= ~MMA8452_CTRL_DR_MASK;
		data->ctrl_reg1 \|= i << MMA8452_CTRL_DR_SHIFT;

		data->sleep_val = mma8452_calculate_sleep(data);

		ret = mma8452_change_config(data, MMA8452_CTRL_REG1,
		data->ctrl_reg1);
		break;
		@@ -1593,6 +1612,9 @@ static int mma8452_probe(struct i2c_client *client,

		data->ctrl_reg1 = MMA8452_CTRL_ACTIVE \|
		(MMA8452_CTRL_DR_DEFAULT << MMA8452_CTRL_DR_SHIFT);

		data->sleep_val = mma8452_calculate_sleep(data);

		ret = i2c_smbus_write_byte_data(client, MMA8452_CTRL_REG1,
		data->ctrl_reg1);
		if (ret < 0)