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WM8904 I2C: Fix an error in writing. I am not sure why this fixes the problem

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This commit is contained in:
Gregory Nutt 2014-08-01 18:22:33 -06:00
parent 2ced090bc8
commit 7e576e308a
1 changed files with 6 additions and 18 deletions
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24
drivers/audio/wm8904.c
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@ -348,32 +348,20 @@ static void wm8904_writereg(FAR struct wm8904_dev_s *priv, uint8_t regaddr,
for (retries = 1; retries <= 3; retries++)
{
struct i2c_msg_s msg[2];
uint8_t data[2];
uint8_t data[3];
int ret;
/* Set up to write the address */
/* Set up the data to write */
msg[0].addr = priv->lower->address;
msg[0].flags = 0;
msg[0].buffer = &regaddr;
msg[0].length = 1;
/* Followed by the read data */
data[0] = regval >> 8;
data[1] = regval & 0xff;
msg[1].addr = priv->lower->address;
msg[1].flags = I2C_M_NORESTART;
msg[1].buffer = data;
msg[1].length = 2;
data[0] = regaddr;
data[1] = regval >> 8;
data[2] = regval & 0xff;
/* Read the register data. The returned value is the number messages
* completed.
*/
ret = I2C_TRANSFER(priv->i2c, msg, 2);
ret = I2C_WRITE(priv->i2c, data, 3);
if (ret < 0)
{
#ifdef CONFIG_I2C_RESET