Because some old designware IPs were not supporting setting an SDA hold time, vendors developed their own solution. Add a way for the final driver to provide its own SDA hold time handling.
Signed-off-by: Alexandre Belloni <[email protected]> --- drivers/i2c/busses/i2c-designware-common.c | 6 ++++++ drivers/i2c/busses/i2c-designware-core.h | 1 + 2 files changed, 7 insertions(+) diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c index 9afc3e075b33..545b69d6be3c 100644 --- a/drivers/i2c/busses/i2c-designware-common.c +++ b/drivers/i2c/busses/i2c-designware-common.c @@ -297,6 +297,12 @@ void i2c_dw_set_sda_hold_time(struct dw_i2c_dev *dev) { u32 reg; + if (dev->set_sda_hold_time) { + dev->set_sda_hold_time(dev); + + return; + } + /* Configure SDA Hold Time if required. */ reg = dw_readl(dev, DW_IC_COMP_VERSION); if (reg >= DW_IC_SDA_HOLD_MIN_VERS) { diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index bc43fb9ac1cf..b2778b6d8aca 100644 --- a/drivers/i2c/busses/i2c-designware-core.h +++ b/drivers/i2c/busses/i2c-designware-core.h @@ -283,6 +283,7 @@ struct dw_i2c_dev { void (*disable)(struct dw_i2c_dev *dev); void (*disable_int)(struct dw_i2c_dev *dev); int (*init)(struct dw_i2c_dev *dev); + int (*set_sda_hold_time)(struct dw_i2c_dev *dev); int mode; struct i2c_bus_recovery_info rinfo; }; -- 2.18.0
