Resolved! I can't control I2C4 for STMPIC1 from u-boot.
We made device tree for u-boot of stm32151c. But it can't work i2c4 for STPMIC1. PZ4,PZ5 is correctly connected to STMPIC1 with pull-up resistance.SDA,SCL has no signal.Attached is a device tree file.Please let me know what additional point to review...