diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0945-rtc-rv3028-Refresh-RAM-on-EEPROM-write.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0945-rtc-rv3028-Refresh-RAM-on-EEPROM-write.patch | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0945-rtc-rv3028-Refresh-RAM-on-EEPROM-write.patch b/target/linux/bcm27xx/patches-5.4/950-0945-rtc-rv3028-Refresh-RAM-on-EEPROM-write.patch new file mode 100644 index 0000000000..94e3038c8a --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0945-rtc-rv3028-Refresh-RAM-on-EEPROM-write.patch @@ -0,0 +1,92 @@ +From 010b506d6b215673f188ed5cdc4e35419e3ea715 Mon Sep 17 00:00:00 2001 +From: Einar Vading <einar.vading@rhimagnesita.com> +Date: Fri, 14 Aug 2020 22:14:41 +0200 +Subject: [PATCH] rtc: rv3028: Refresh RAM on EEPROM write + +The active RV3028 settings are in RAM so after modifying the settings in +EEPROM the RAM should be refreshed so that they take effect. + +Signed-off-by: Einar Vading <einar.vading@rhimagnesita.com> +--- + drivers/rtc/rtc-rv3028.c | 56 ++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 56 insertions(+) + +--- a/drivers/rtc/rtc-rv3028.c ++++ b/drivers/rtc/rtc-rv3028.c +@@ -66,6 +66,7 @@ + + #define RV3028_EVT_CTRL_TSR BIT(2) + ++#define RV3028_EEPROM_CMD_REFRESH 0x12 + #define RV3028_EEPROM_CMD_WRITE 0x21 + #define RV3028_EEPROM_CMD_READ 0x22 + +@@ -583,6 +584,58 @@ restore_eerd: + return ret; + } + ++static int rv3028_ram_refresh(void *priv) ++{ ++ u32 status, ctrl1; ++ int ret, err; ++ ++ ret = regmap_read(priv, RV3028_CTRL1, &ctrl1); ++ if (ret) ++ return ret; ++ ++ if (!(ctrl1 & RV3028_CTRL1_EERD)) { ++ ret = regmap_update_bits(priv, RV3028_CTRL1, ++ RV3028_CTRL1_EERD, RV3028_CTRL1_EERD); ++ if (ret) ++ return ret; ++ ++ ret = regmap_read_poll_timeout(priv, RV3028_STATUS, status, ++ !(status & RV3028_STATUS_EEBUSY), ++ RV3028_EEBUSY_POLL, ++ RV3028_EEBUSY_TIMEOUT); ++ if (ret) ++ goto restore_eerd; ++ } ++ ++ ret = regmap_write(priv, RV3028_EEPROM_CMD, 0x0); ++ if (ret) ++ goto restore_eerd; ++ ++ ret = regmap_write(priv, RV3028_EEPROM_CMD, ++ RV3028_EEPROM_CMD_REFRESH); ++ if (ret) ++ goto restore_eerd; ++ ++ usleep_range(RV3028_EEBUSY_POLL, RV3028_EEBUSY_TIMEOUT); ++ ++ ret = regmap_read_poll_timeout(priv, RV3028_STATUS, status, ++ !(status & RV3028_STATUS_EEBUSY), ++ RV3028_EEBUSY_POLL, ++ RV3028_EEBUSY_TIMEOUT); ++ if (ret) ++ goto restore_eerd; ++ ++restore_eerd: ++ if (!(ctrl1 & RV3028_CTRL1_EERD)) { ++ err = regmap_update_bits(priv, RV3028_CTRL1, RV3028_CTRL1_EERD, ++ 0); ++ if (err && !ret) ++ ret = err; ++ } ++ ++ return ret; ++} ++ + static struct rtc_class_ops rv3028_rtc_ops = { + .read_time = rv3028_get_time, + .set_time = rv3028_set_time, +@@ -723,6 +776,9 @@ static int rv3028_probe(struct i2c_clien + ret = rv3028_eeprom_write( + (void *)(rv3028->regmap), + RV3028_BACKUP, (void *)&backup, 1); ++ ++ if (!ret) ++ ret = rv3028_ram_refresh((void *)(rv3028->regmap)); + } + } + |