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rtc: rv3028: Add backup switchover mode support

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Signed-off-by: Phil Howard <phil@pimoroni.com>
This commit is contained in:
Phil Howard
2019-03-29 10:53:14 +00:00
committed by popcornmix
parent 653bb6a0aa
commit e4d4099ba6
1 changed files with 17 additions and 0 deletions
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17
drivers/rtc/rtc-rv3028.c
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@@ -73,6 +73,7 @@
#define RV3028_BACKUP_TCE BIT(5)
#define RV3028_BACKUP_TCR_MASK GENMASK(1,0)
#define RV3028_BACKUP_BSM_MASK 0x0C
#define OFFSET_STEP_PPT 953674
@@ -600,6 +601,7 @@ static int rv3028_probe(struct i2c_client *client)
struct rv3028_data *rv3028;
int ret, status;
u32 ohms;
u8 bsm;
struct nvmem_config nvmem_cfg = {
.name = "rv3028_nvram",
.word_size = 1,
@@ -670,6 +672,21 @@ static int rv3028_probe(struct i2c_client *client)
if (ret)
return ret;
/* setup backup switchover mode */
if (!device_property_read_u8(&client->dev, "backup-switchover-mode",
&bsm)) {
if (bsm <= 3) {
ret = regmap_update_bits(rv3028->regmap, RV3028_BACKUP,
RV3028_BACKUP_BSM_MASK,
(bsm & 0x03) << 2);
if (ret)
return ret;
} else {
dev_warn(&client->dev, "invalid backup switchover mode value\n");
}
}
/* setup trickle charger */
if (!device_property_read_u32(&client->dev, "trickle-resistor-ohms",
&ohms)) {