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i2c: Create common default i2c_[set|get]_bus_speed() functions

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New default, weak i2c_get_bus_speed() and i2c_set_bus_speed() functions
replace a number of architecture-specific implementations.

Also, providing default functions will allow all boards to enable
CONFIG_I2C_CMD_TREE.  This was previously not possible since the
tree-form of the i2c command provides the ability to display and modify
the i2c bus speed which requires i2c_[set|get]_bus_speed() to be
present.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
This commit is contained in:
Peter Tyser
2009-04-18 22:34:01 -05:00
committed by Wolfgang Denk
parent 8229e9c04f
commit 655b34a78a
6 changed files with 18 additions and 65 deletions
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18
common/cmd_i2c.c
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@@ -138,6 +138,24 @@ DECLARE_GLOBAL_DATA_PTR;
static int
mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[]);
/* TODO: Implement architecture-specific get/set functions */
unsigned int __def_i2c_get_bus_speed(void)
{
return CONFIG_SYS_I2C_SPEED;
}
unsigned int i2c_get_bus_speed(void)
__attribute__((weak, alias("__def_i2c_get_bus_speed")));
int __def_i2c_set_bus_speed(unsigned int speed)
{
if (speed != CONFIG_SYS_I2C_SPEED)
return -1;
return 0;
}
int i2c_set_bus_speed(unsigned int)
__attribute__((weak, alias("__def_i2c_set_bus_speed")));
/*
* Syntax:
* imd {i2c_chip} {addr}{.0, .1, .2} {len}