Hi Annaliese, thank you for mention that we have multiple I2C interfaces. On 08.05.19 09:12, Annaliese McDermond wrote: > + > +static struct clk *bcm2835_i2c_register_div(struct device *dev, > + const char *mclk_name, > + struct bcm2835_i2c_dev *i2c_dev) > +{ > + struct clk_init_data init; > + struct clk_bcm2835_i2c *priv; > + const char *devname = dev_name(dev); > + > + init.ops = &clk_bcm2835_i2c_ops; > + init.name = "bcm2835-i2c"; Does this work intentionally in case i2c-0 and i2c-1 are used at the same time? Please also check the output of /sys/kernel/debug/clk/clk_summary Regards Stefan