From 9113b57d7b8ef97bd25d3b8482cfd870d70f0545 Mon Sep 17 00:00:00 2001 From: Phil Howard Date: Fri, 29 Mar 2019 10:53:14 +0000 Subject: [PATCH 0496/1085] rtc: rv3028: Add backup switchover mode support Signed-off-by: Phil Howard --- drivers/rtc/rtc-rv3028.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) --- a/drivers/rtc/rtc-rv3028.c +++ b/drivers/rtc/rtc-rv3028.c @@ -858,16 +858,17 @@ static const struct regmap_config regmap static u8 rv3028_set_trickle_charger(struct rv3028_data *rv3028, struct i2c_client *client) { - int ret, val_old, val; + int ret, val_old, val, val_mask; u32 ohms, chargeable; + u32 bsm; ret = regmap_read(rv3028->regmap, RV3028_BACKUP, &val_old); if (ret < 0) return ret; /* mask out only trickle charger bits */ - val_old = val_old & (RV3028_BACKUP_TCE | RV3028_BACKUP_TCR_MASK); - val = val_old; + val_mask = RV3028_BACKUP_TCE | RV3028_BACKUP_TCR_MASK; + val = val_old & val_mask; /* setup trickle charger */ if (!device_property_read_u32(&client->dev, "trickle-resistor-ohms", @@ -902,10 +903,21 @@ static u8 rv3028_set_trickle_charger(str } } + /* setup backup switchover mode */ + if (!device_property_read_u32(&client->dev, + "backup-switchover-mode", + &bsm)) { + if (bsm <= 3) { + val_mask |= RV3028_BACKUP_BSM; + val |= (u8)(bsm << 2); + } else { + dev_warn(&client->dev, "invalid backup switchover mode value\n"); + } + } + /* only update EEPROM if changes are necessary */ - if (val_old != val) { - ret = rv3028_update_cfg(rv3028, RV3028_BACKUP, RV3028_BACKUP_TCE | - RV3028_BACKUP_TCR_MASK, val); + if ((val_old & val_mask) != val) { + ret = rv3028_update_cfg(rv3028, RV3028_BACKUP, val_mask, val); if (ret) return ret; }