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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0366-rtc-rv3028-Add-backup-switchover-mode-support.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0366-rtc-rv3028-Add-backup-switchover-mode-support.patch50
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0366-rtc-rv3028-Add-backup-switchover-mode-support.patch b/target/linux/brcm2708/patches-4.19/950-0366-rtc-rv3028-Add-backup-switchover-mode-support.patch
new file mode 100644
index 0000000000..7eac71099d
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0366-rtc-rv3028-Add-backup-switchover-mode-support.patch
@@ -0,0 +1,50 @@
+From fb4e195012c405a04b1a7a86e240ceada0c8aa65 Mon Sep 17 00:00:00 2001
+From: Phil Howard <phil@gadgetoid.com>
+Date: Fri, 29 Mar 2019 10:53:14 +0000
+Subject: [PATCH] rtc: rv3028: Add backup switchover mode support
+
+Signed-off-by: Phil Howard <phil@pimoroni.com>
+---
+ drivers/rtc/rtc-rv3028.c | 17 +++++++++++++++++
+ 1 file changed, 17 insertions(+)
+
+--- a/drivers/rtc/rtc-rv3028.c
++++ b/drivers/rtc/rtc-rv3028.c
+@@ -74,6 +74,7 @@
+
+ #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
+
+@@ -601,6 +602,7 @@ static int rv3028_probe(struct i2c_clien
+ struct rv3028_data *rv3028;
+ int ret, status;
+ u32 ohms;
++ u8 bsm;
+ struct nvmem_config nvmem_cfg = {
+ .name = "rv3028_nvram",
+ .word_size = 1,
+@@ -671,6 +673,21 @@ static int rv3028_probe(struct i2c_clien
+ 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)) {