d0/d89/pcf8523_8h_source.html

/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef _I2C_PCF8523_H_

#define _I2C_PCF8523_H_


/* The address of this RTC is fixed. */

#define PCF8523_SLAVE_ADR               0x68


/* Register layout */

#define CTRL_REG_1                      0x00

#define  STOP_BIT                       (1 << 5)

#define  CAP_SEL                        (1 << 7)

#define CTRL_REG_2                      0x01

#define CTRL_REG_3                      0x02

#define  PM_MASK                        (7 << 5)

#define SECOND_REG                      0x03

#define  OS_BIT                         (1 << 7)

#define MINUTE_REG                      0x04

#define HOUR_REG                        0x05

#define DAY_REG                         0x06

#define WEEKDAY_REG                     0x07

#define MONTH_REG                       0x08

#define YEAR_REG                        0x09

#define ALARM_MINUTE_REG                0x0A

#define ALARM_HOUR_REG                  0x0B

#define ALARM_DAY_REG                   0x0C

#define ALARM_WEEKDAY_REG               0x0D

#define OFFSET_REG                      0x0E

#define TMR_CLKOUT_REG                  0x0F

#define  COF_MASK                       0x38

#define TMR_A_FREQ_REG                  0x10

#define TMR_A_REG                       0x11

#define TMR_B_FREQ_REG                  0x12

#define TMR_B_REG                       0x13


/* Define used capacitor modes */

/* Valid for parameter cap_sel */

#define CAP_SEL_7_PF                    0x00

#define CAP_SEL_12_PF                   0x01


/* Define supported power modes */

/* Valid for parameter power_mode */

#define PM_BAT_SW_STD_LOW_DETECT        0x00

#define PM_BAT_SW_DIRECT_LOW_DETECT     0x01

#define PM_BAT_SW_OFF_LOW_DETECT        0x02

#define PM_BAT_SW_STD_LOW_DETECT_OFF    0x04

#define PM_BAT_SW_DIRECT_LOW_DETECT_OFF 0x05

#define PM_BAT_SW_OFF_LOW_DETECT_OFF    0x07


/* Define CLKOUT frequency divider values */

/* Valid for parameter cof_selection */

#define COF_32768_HZ                    0x00

#define COF_16384_HZ                    0x01

#define COF_8192_HZ                     0x02

#define COF_4096_HZ                     0x03

#define COF_1024_HZ                     0x04

#define COF_32_HZ                       0x05

#define COF_1_HZ                        0x06

#define COF_OFF                         0x07


/* Define timer A & B set up values */

/* Valid for parameter tmrA_prescaler and tmrB_prescaler */

#define TMR_CLK_4096_HZ                 0x00

#define TMR_CLK_64_HZ                   0x01

#define TMR_CLK_1_HZ                    0x02

#define TMR_CLK_1_60_HZ                 0x03

#define TMR_CLK_1_3600_HZ               0x07


/* Valid for parameter tmrA_mode and tmrB_mode */

#define TMR_DISABLED                    0x00

#define TMR_A_MODE_COUNTDOWN            0x01

#define TMR_A_MODE_WATCHDOG             0x02

#define TMR_B_MODE_ENABLED              0x01


/* Valid for parameter tmrB_pulse_cfg */

#define TMR_B_PULSE_WIDTH_46_MS         0x00

#define TMR_B_PULSE_WIDTH_62_MS         0x01

#define TMR_B_PULSE_WIDTH_78_MS         0x02

#define TMR_B_PULSE_WIDTH_93_MS         0x03

#define TMR_B_PULSE_WIDTH_125_MS        0x04

#define TMR_B_PULSE_WIDTH_156_MS        0x05

#define TMR_B_PULSE_WIDTH_187_MS        0x06

#define TMR_B_PULSE_WIDTH_218_MS        0x07


#endif /* _I2C_PCF8523_H_ */