include/spmi/spmi.h

   1 #ifndef _SPMI_SPMI_H
   2 #define _SPMI_SPMI_H
   3
   4 /**
   5  * struct dm_spmi_ops - SPMI device I/O interface
   6  *
   7  * Should be implemented by UCLASS_SPMI device drivers. The standard
   8  * device operations provides the I/O interface for it's childs.
   9  *
  10  * @read:      read register 'reg' of slave 'usid' and peripheral 'pid'
  11  * @write:     write register 'reg' of slave 'usid' and peripheral 'pid'
  12  *
  13  * Each register is 8-bit, both read and write can return negative values
  14  * on error.
  15  */
  16 struct dm_spmi_ops {
  17         int (*read)(struct udevice *dev, int usid, int pid, int reg);
  18         int (*write)(struct udevice *dev, int usid, int pid, int reg,
  19                      uint8_t value);
  20 };
  21
  22 /**
  23  * spmi_reg_read() - read a register from specific slave/peripheral
  24  *
  25  * @dev:        SPMI bus to read
  26  * @usid        SlaveID
  27  * @pid         Peripheral ID
  28  * @reg:        Register to read
  29  * @return value read on success or negative value of errno.
  30  */
  31 int spmi_reg_read(struct udevice *dev, int usid, int pid, int reg);
  32
  33 /**
  34  * spmi_reg_write() - write a register of specific slave/peripheral
  35  *
  36  * @dev:        SPMI bus to write
  37  * @usid        SlaveID
  38  * @pid         Peripheral ID
  39  * @reg:        Register to write
  40  * @value:      Value to write
  41  * @return 0 on success or negative value of errno.
  42  */
  43 int spmi_reg_write(struct udevice *dev, int usid, int pid, int reg,
  44                    uint8_t value);
  45
  46 #endif