Staging: iio: adis16400: fix some minor issues and clean-up

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / staging / iio / imu / adis16400_core.c

diff --git a/drivers/staging/iio/imu/adis16400_core.c b/drivers/staging/iio/imu/adis16400_core.c
index 8957985..a668a90 100644 (file)
--- a/drivers/staging/iio/imu/adis16400_core.c
+++ b/drivers/staging/iio/imu/adis16400_core.c
@@ -36,6 +36,8 @@
 
 #define DRIVER_NAME            "adis16400"
 
+static int adis16400_check_status(struct device *dev);
+
 /* At the moment the spi framework doesn't allow global setting of cs_change.
  * It's in the likely to be added comment at the top of spi.h.
  * This means that use cannot be made of spi_write etc.
@@ -161,54 +163,6 @@ error_ret:
        return ret;
 }
 
-/**
- * adis16400_spi_read_burst() - read all data registers
- * @dev: device associated with child of actual device (iio_dev or iio_trig)
- * @rx: somewhere to pass back the value read (min size is 24 bytes)
- **/
-int adis16400_spi_read_burst(struct device *dev, u8 *rx)
-{
-       struct spi_message msg;
-       struct iio_dev *indio_dev = dev_get_drvdata(dev);
-       struct adis16400_state *st = iio_dev_get_devdata(indio_dev);
-       u32 old_speed_hz = st->us->max_speed_hz;
-       int ret;
-
-       struct spi_transfer xfers[] = {
-               {
-                       .tx_buf = st->tx,
-                       .bits_per_word = 8,
-                       .len = 2,
-                       .cs_change = 0,
-               }, {
-                       .rx_buf = rx,
-                       .bits_per_word = 8,
-                       .len = 24,
-                       .cs_change = 1,
-               },
-       };
-
-       mutex_lock(&st->buf_lock);
-       st->tx[0] = ADIS16400_READ_REG(ADIS16400_GLOB_CMD);
-       st->tx[1] = 0;
-
-       spi_message_init(&msg);
-       spi_message_add_tail(&xfers[0], &msg);
-       spi_message_add_tail(&xfers[1], &msg);
-
-       st->us->max_speed_hz = min(ADIS16400_SPI_BURST, old_speed_hz);
-       spi_setup(st->us);
-
-       ret = spi_sync(st->us, &msg);
-       if (ret)
-               dev_err(&st->us->dev, "problem when burst reading");
-
-       st->us->max_speed_hz = old_speed_hz;
-       spi_setup(st->us);
-       mutex_unlock(&st->buf_lock);
-       return ret;
-}
-
 static ssize_t adis16400_spi_read_signed(struct device *dev,
                struct device_attribute *attr,
                char *buf,
@@ -277,7 +231,6 @@ static ssize_t adis16400_read_12bit_signed(struct device *dev,
        return ret;
 }
 
-
 static ssize_t adis16400_write_16bit(struct device *dev,
                struct device_attribute *attr,
                const char *buf,
@@ -349,6 +302,18 @@ static ssize_t adis16400_write_frequency(struct device *dev,
        return ret ? ret : len;
 }
 
+static int adis16400_reset(struct device *dev)
+{
+       int ret;
+       ret = adis16400_spi_write_reg_8(dev,
+                       ADIS16400_GLOB_CMD,
+                       ADIS16400_GLOB_CMD_SW_RESET);
+       if (ret)
+               dev_err(dev, "problem resetting device");
+
+       return ret;
+}
+
 static ssize_t adis16400_write_reset(struct device *dev,
                struct device_attribute *attr,
                const char *buf, size_t len)
@@ -364,8 +329,6 @@ static ssize_t adis16400_write_reset(struct device *dev,
        return -1;
 }
 
-
-
 int adis16400_set_irq(struct device *dev, bool enable)
 {
        int ret;
@@ -388,18 +351,6 @@ error_ret:
        return ret;
 }
 
-int adis16400_reset(struct device *dev)
-{
-       int ret;
-       ret = adis16400_spi_write_reg_8(dev,
-                       ADIS16400_GLOB_CMD,
-                       ADIS16400_GLOB_CMD_SW_RESET);
-       if (ret)
-               dev_err(dev, "problem resetting device");
-
-       return ret;
-}
-
 /* Power down the device */
 static int adis16400_stop_device(struct device *dev)
 {
@@ -430,7 +381,7 @@ err_ret:
        return ret;
 }
 
-int adis16400_check_status(struct device *dev)
+static int adis16400_check_status(struct device *dev)
 {
        u16 status;
        int ret;
@@ -496,6 +447,11 @@ static int adis16400_initial_setup(struct adis16400_state *st)
        }
 
        /* Do self test */
+       ret = adis16400_self_test(dev);
+       if (ret) {
+               dev_err(dev, "self test failure");
+               goto err_ret;
+       }
 
        /* Read status register to check the result */
        ret = adis16400_check_status(dev);