diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-designware-master.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-designware-master.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c index b6c17b550d31..139ba98c4033 100644 --- a/drivers/i2c/busses/i2c-designware-master.c +++ b/drivers/i2c/busses/i2c-designware-master.c @@ -657,6 +657,30 @@ static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id) return IRQ_HANDLED; } +void i2c_dw_configure_master(struct dw_i2c_dev *dev) +{ + struct i2c_timings *t = &dev->timings; + + dev->functionality = I2C_FUNC_10BIT_ADDR | DW_IC_DEFAULT_FUNCTIONALITY; + + dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | + DW_IC_CON_RESTART_EN; + + dev->mode = DW_IC_MASTER; + + switch (t->bus_freq_hz) { + case I2C_MAX_STANDARD_MODE_FREQ: + dev->master_cfg |= DW_IC_CON_SPEED_STD; + break; + case I2C_MAX_HIGH_SPEED_MODE_FREQ: + dev->master_cfg |= DW_IC_CON_SPEED_HIGH; + break; + default: + dev->master_cfg |= DW_IC_CON_SPEED_FAST; + } +} +EXPORT_SYMBOL_GPL(i2c_dw_configure_master); + static void i2c_dw_prepare_recovery(struct i2c_adapter *adap) { struct dw_i2c_dev *dev = i2c_get_adapdata(adap); |