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bdk: rtc: add T210B01 R2P

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CTCaer 2022-12-19 05:30:23 +02:00
parent 09ca75dd8c
commit c9ab6352f6
2 changed files with 77 additions and 0 deletions
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42
bdk/rtc/max77620-rtc.c
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@ -153,3 +153,45 @@ u32 max77620_rtc_date_to_epoch(const rtc_time_t *time)
return epoch;
}
void max77620_rtc_set_reboot_reason(rtc_reboot_reason_t *rr)
{
max77620_rtc_stop_alarm();
// Set reboot reason.
i2c_send_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM1_YEAR_REG, rr->enc.val1);
i2c_send_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM2_YEAR_REG, rr->enc.val2);
// Set reboot reason magic.
i2c_send_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM1_WEEKDAY_REG, RTC_REBOOT_REASON_MAGIC);
i2c_send_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM2_WEEKDAY_REG, RTC_REBOOT_REASON_MAGIC);
// Update RTC clock from RTC regs.
i2c_send_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_RTC_UPDATE0_REG, MAX77620_RTC_WRITE_UPDATE);
msleep(16);
}
bool max77620_rtc_get_reboot_reason(rtc_reboot_reason_t *rr)
{
u8 magic[2];
// Get reboot reason magic.
magic[0] = i2c_recv_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM1_WEEKDAY_REG);
magic[1] = i2c_recv_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM2_WEEKDAY_REG);
// Magic must be correct and match on both registers.
if (magic[0] != RTC_REBOOT_REASON_MAGIC || magic[0] != magic[1])
return false;
// Reboot reason setter is expected to have updated the actual regs already.
rr->enc.val1 = i2c_recv_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM1_YEAR_REG);
rr->enc.val2 = i2c_recv_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM2_YEAR_REG);
// Clear magic and update actual regs.
i2c_send_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM1_WEEKDAY_REG, 0);
i2c_send_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_ALARM2_WEEKDAY_REG, 0);
i2c_send_byte(I2C_5, MAX77620_RTC_I2C_ADDR, MAX77620_RTC_UPDATE0_REG, MAX77620_RTC_WRITE_UPDATE);
// Return reboot reason. False if [config] was selected.
return true;
}

35
bdk/rtc/max77620-rtc.h
View File

@ -74,10 +74,45 @@ typedef struct _rtc_time_t {
u16 year;
} rtc_time_t;
#define RTC_REBOOT_REASON_MAGIC 0x77 // 7-bit reg.
enum {
REBOOT_REASON_NOP = 0, // Use [config].
REBOOT_REASON_SELF = 1, // Use autoboot_idx/autoboot_list.
REBOOT_REASON_MENU = 2, // Force menu.
REBOOT_REASON_UMS = 3, // Force selected UMS partition.
REBOOT_REASON_REC = 4, // Set PMC_SCRATCH0_MODE_RECOVERY and reboot to self.
REBOOT_REASON_PANIC = 5 // Inform bootloader that panic occured if T210B01.
};
typedef struct _rtc_rr_decoded_t
{
u16 reason:4;
u16 autoboot_idx:4;
u16 autoboot_list:1;
u16 ums_idx:3;
} rtc_rr_decoded_t;
typedef struct _rtc_rr_encoded_t
{
u16 val1:6; // 6-bit reg.
u16 val2:6; // 6-bit reg.
} rtc_rr_encoded_t;
typedef struct _rtc_reboot_reason_t
{
union {
rtc_rr_decoded_t dec;
rtc_rr_encoded_t enc;
};
} rtc_reboot_reason_t;
void max77620_rtc_prep_read();
void max77620_rtc_get_time(rtc_time_t *time);
void max77620_rtc_stop_alarm();
void max77620_rtc_epoch_to_date(u32 epoch, rtc_time_t *time);
u32 max77620_rtc_date_to_epoch(const rtc_time_t *time);
void max77620_rtc_set_reboot_reason(rtc_reboot_reason_t *rr);
bool max77620_rtc_get_reboot_reason(rtc_reboot_reason_t *rr);
#endif /* _MFD_MAX77620_RTC_H_ */