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i2c: merge all i2c_reg_read() and i2c_reg_write() into inline functions

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All implementations of the functions i2c_reg_read() and
i2c_reg_write() are identical. We can save space and simplify the
code by converting these functions into inlines and putting them in
i2c.h.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-By: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
This commit is contained in:
Timur Tabi 2008-12-03 11:28:30 -06:00 • committed by Wolfgang Denk
parent e39cd81c44
commit ecf5f077c8
14 changed files with 60 additions and 231 deletions
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62
include/i2c.h
View file

@ -76,6 +76,20 @@
# define I2C_SOFT_DECLARATIONS
# endif
#endif
#ifdef CONFIG_8xx
/* Set default values for the I2C bus speed and slave address on 8xx. In the
* future, we'll define these in all 8xx board config files.
*/
#ifndef CONFIG_SYS_I2C_SPEED
#define CONFIG_SYS_I2C_SPEED 50000
#endif
#ifndef CONFIG_SYS_I2C_SLAVE
#define CONFIG_SYS_I2C_SLAVE 0xFE
#endif
#endif
/*
* Initialization, must be called once on start up, may be called
* repeatedly to change the speed and slave addresses.
@ -132,8 +146,52 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len);
/*
* Utility routines to read/write registers.
*/
uchar i2c_reg_read (uchar chip, uchar reg);
void i2c_reg_write(uchar chip, uchar reg, uchar val);
static inline u8 i2c_reg_read(u8 addr, u8 reg)
{
u8 buf;
#ifdef CONFIG_8xx
/* MPC8xx needs this. Maybe one day we can get rid of it. */
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif
#ifdef DEBUG
printf("%s: addr=0x%02x, reg=0x%02x\n", __func__, addr, reg);
#endif
#ifdef CONFIG_BLACKFIN
/* This ifdef will become unneccessary in a future version of the
* blackfin I2C driver.
*/
i2c_read(addr, reg, 0, &buf, 1);
#else
i2c_read(addr, reg, 1, &buf, 1);
#endif
return buf;
}
static inline void i2c_reg_write(u8 addr, u8 reg, u8 val)
{
#ifdef CONFIG_8xx
/* MPC8xx needs this. Maybe one day we can get rid of it. */
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif
#ifdef DEBUG
printf("%s: addr=0x%02x, reg=0x%02x, val=0x%02x\n",
__func__, addr, reg, val);
#endif
#ifdef CONFIG_BLACKFIN
/* This ifdef will become unneccessary in a future version of the
* blackfin I2C driver.
*/
i2c_write(addr, reg, 0, &val, 1);
#else
i2c_write(addr, reg, 1, &val, 1);
#endif
}
/*
* Functions for setting the current I2C bus and its speed