1 From c91a8597734d13ebb5ac7393fa6f100d70f15664 Mon Sep 17 00:00:00 2001
2 From: Phil Howard <phil@gadgetoid.com>
3 Date: Fri, 29 Mar 2019 10:53:14 +0000
4 Subject: [PATCH] rtc: rv3028: Add backup switchover mode support
6 Signed-off-by: Phil Howard <phil@pimoroni.com>
8 drivers/rtc/rtc-rv3028.c | 17 +++++++++++++++++
9 1 file changed, 17 insertions(+)
11 --- a/drivers/rtc/rtc-rv3028.c
12 +++ b/drivers/rtc/rtc-rv3028.c
15 #define RV3028_BACKUP_TCE BIT(5)
16 #define RV3028_BACKUP_TCR_MASK GENMASK(1,0)
17 +#define RV3028_BACKUP_BSM_MASK 0x0C
19 #define OFFSET_STEP_PPT 953674
21 @@ -600,6 +601,7 @@ static int rv3028_probe(struct i2c_clien
22 struct rv3028_data *rv3028;
26 struct nvmem_config nvmem_cfg = {
27 .name = "rv3028_nvram",
29 @@ -671,6 +673,21 @@ static int rv3028_probe(struct i2c_clien
33 + /* setup backup switchover mode */
34 + if (!device_property_read_u8(&client->dev, "backup-switchover-mode",
37 + ret = regmap_update_bits(rv3028->regmap, RV3028_BACKUP,
38 + RV3028_BACKUP_BSM_MASK,
44 + dev_warn(&client->dev, "invalid backup switchover mode value\n");
48 /* setup trickle charger */
49 if (!device_property_read_u32(&client->dev, "trickle-resistor-ohms",