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Add logic to set MAX17040 frequency

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4326 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2012-01-23 19:59:09 +00:00
parent c08b3cce81
commit 62e9cdbb79
3 changed files with 28 additions and 11 deletions
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3
ChangeLog
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@ -2389,8 +2389,7 @@
* include/nuttx/power/pm.h: Move include/nuttx/pm.h into a sub-directory named
power.
* drivers/power: Rename the drivers/pm directory to power
* drivers/power/max1704x.c: Add a skeleton file that will eventually become
the MAX17040x battery driver.
* include/power/battery.h and drivers/battery.c: Add the interface definitions
for an upper and lower half battery driver. Add the implementation of the
common upper half battery driver.
* drivers/power/max1704x.c: Add a driver for MAX17040x battery "fuel guage"

29
drivers/power/max1704x.c
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@ -184,6 +184,7 @@ struct max1704x_dev_s
FAR struct i2c_dev_s *i2c; /* I2C interface */
uint8_t addr; /* I2C address */
uint32_t frequency; /* I2C frequency */
};
/****************************************************************************
@ -245,9 +246,12 @@ static int max1704x_getreg16(FAR struct max1704x_dev_s *priv, uint8_t regaddr,
uint8_t buffer[2];
int ret;
/* Write the register address */
/* Set the I2C address and address size */
I2C_SETADDRESS(priv->i2c, priv->addr, 7);
/* Write the register address */
ret = I2C_WRITE(priv->i2c, &regaddr, 1);
if (ret < 0)
{
@ -293,9 +297,12 @@ static int max1704x_putreg16(FAR struct max1704x_dev_s *priv, uint8_t regaddr,
buffer[1] = (uint8_t)(regval >> 8);
buffer[2] = (uint8_t)(regval & 0xff);
/* Write the register address followed by the data (no RESTART) */
/* Set the I2C address and address size */
I2C_SETADDRESS(priv->i2c, priv->addr, 7);
/* Write the register address followed by the data (no RESTART) */
return I2C_WRITE(priv->i2c, buffer, 3);
}
@ -505,7 +512,8 @@ static int max1704x_capacity(struct battery_dev_s *dev, b16_t *value)
*
* Input Parameters:
* i2c - An instance of the I2C interface to use to communicate with the MAX1704x
* addr - The I2C address of the MAX1704x.
* addr - The I2C address of the MAX1704x (Better be 0x36).
* frequency - The I2C frequency
*
* Returned Value:
* A pointer to the intialized lower-half driver instance. A NULL pointer
@ -514,7 +522,7 @@ static int max1704x_capacity(struct battery_dev_s *dev, b16_t *value)
****************************************************************************/
FAR struct battery_dev_s *max1704x_initialize(FAR struct i2c_dev_s *i2c,
uint8_t addr)
uint8_t addr, uint32_t frequency)
{
FAR struct max1704x_dev_s *priv;
int ret;
@ -527,12 +535,18 @@ FAR struct battery_dev_s *max1704x_initialize(FAR struct i2c_dev_s *i2c,
/* Initialize the MAX1704x device structure */
sem_init(&priv->batsem, 0, 1);
priv->ops = &g_max1704xops;
priv->i2c = i2c;
priv->addr = addr;
priv->ops = &g_max1704xops;
priv->i2c = i2c;
priv->addr = addr;
priv->frequency = frequency;
/* Set the I2C frequency (ignoring the returned, actual frequency) */
(void)I2C_SETFREQUENCY(i2c, priv->frequency);
/* Reset the MAX1704x (mostly just to make sure that we can talk to it) */
#if 0
ret = max1704x_reset(priv);
if (ret < 0)
{
@ -540,6 +554,7 @@ FAR struct battery_dev_s *max1704x_initialize(FAR struct i2c_dev_s *i2c,
kfree(priv);
return NULL;
}
#endif
}
return (FAR struct battery_dev_s *)priv;
}

7
include/nuttx/power/battery.h
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@ -191,7 +191,8 @@ EXTERN int battery_register(FAR const char *devpath,
*
* Input Parameters:
* i2c - An instance of the I2C interface to use to communicate with the MAX1704x
* addr - The I2C address of the MAX1704x.
* addr - The I2C address of the MAX1704x (Better be 0x36).
* frequency - The I2C frequency
*
* Returned Value:
* A pointer to the intialized battery driver instance. A NULL pointer
@ -200,8 +201,10 @@ EXTERN int battery_register(FAR const char *devpath,
****************************************************************************/
#if defined(CONFIG_I2C) && defined(CONFIG_I2C_MAX1704X)
struct i2c_dev_s; /* Forward reference */
EXTERN FAR struct battery_dev_s *
max1704x_initialize(FAR struct i2c_dev_s *i2c, uint8_t addr);
max1704x_initialize(FAR struct i2c_dev_s *i2c, uint8_t addr, uint32_t frequency);
#endif
#undef EXTERN