src/drivers/i2c/rv3028c7/chip.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef __DRIVERS_I2C_RV3028C7_CHIP_H__
   4 #define __DRIVERS_I2C_RV3028C7_CHIP_H__
   5
   6 #include "rv3028c7.h"
   7
   8 /*
   9  * The RTC has three different modes in how the backup voltage is used:
  10  * - OFF: Backup voltage not used
  11  * - DIRECT: Switch to backup voltage if it is higher than VDD
  12  * - LEVEL: Switch to backup voltage if VDD is < 2 V and VBACKUP > 2 V
  13  */
  14 enum sw_mode {
  15         BACKUP_SW_DIRECT = 1,
  16         BACKUP_SW_OFF,
  17         BACKUP_SW_LEVEL
  18 };
  19
  20 /*
  21  * The RTC can be used to charge a capacitor on VBACKUP.
  22  * There are the following modes:
  23  * - OFF: Do not charge the backup capacitor via VDD
  24  * - VIA_3K: Connect the backup capacitor via 3 k resistor with VDD
  25  * - VIA_5K: Connect the backup capacitor via 5 k resistor with VDD
  26  * - VIA_9K: Connect the backup capacitor via 9 k resistor with VDD
  27  * - VIA_15K: Connect the backup capacitor via 15 k resistor with VDD
  28  */
  29 enum charge_mode {
  30         CHARGE_OFF = 0,
  31         CHARGE_VIA_3K,
  32         CHARGE_VIA_5K,
  33         CHARGE_VIA_9K,
  34         CHARGE_VIA_15K
  35 };
  36
  37 struct drivers_i2c_rv3028c7_config {
  38         unsigned int bus_speed;         /* Bus clock in Hz */
  39         unsigned char user_weekday;     /* User day of the week to set */
  40         unsigned char user_day;         /* User day to set */
  41         unsigned char user_month;       /* User month to set */
  42         unsigned char user_year;        /* User year to set (2-digit) */
  43         unsigned char set_user_date;    /* Use user date from devicetree */
  44         enum sw_mode bckup_sw_mode;     /* Mode for switching between VDD and VBACKUP */
  45         enum charge_mode cap_charge;    /* Mode for capacitor charging */
  46 };
  47
  48 #endif /* __DRIVERS_I2C_RV3028C7_CHIP_H__ */