i2c, core: optimze i2c_set_bus_num()
check first, if we are on the bus, we want to enable. If so,
return immediately, do not calc max adapter number, nor check
other things.
Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
diff --git a/drivers/i2c/i2c_core.c b/drivers/i2c/i2c_core.c
index b263562..fe341cd 100644
--- a/drivers/i2c/i2c_core.c
+++ b/drivers/i2c/i2c_core.c
@@ -283,20 +283,22 @@
*/
int i2c_set_bus_num(unsigned int bus)
{
- int max = ll_entry_count(struct i2c_adapter, i2c);
+ int max;
- if (I2C_ADAPTER(bus) >= max) {
- printf("Error, wrong i2c adapter %d max %d possible\n",
- I2C_ADAPTER(bus), max);
- return -2;
- }
+ if ((bus == I2C_BUS) && (I2C_ADAP->init_done > 0))
+ return 0;
+
#ifndef CONFIG_SYS_I2C_DIRECT_BUS
if (bus >= CONFIG_SYS_NUM_I2C_BUSES)
return -1;
#endif
- if ((bus == I2C_BUS) && (I2C_ADAP->init_done > 0))
- return 0;
+ max = ll_entry_count(struct i2c_adapter, i2c);
+ if (I2C_ADAPTER(bus) >= max) {
+ printf("Error, wrong i2c adapter %d max %d possible\n",
+ I2C_ADAPTER(bus), max);
+ return -2;
+ }
#ifndef CONFIG_SYS_I2C_DIRECT_BUS
i2c_mux_disconnet_all();