bcm27xx: update 6.1 patches from RPi foundation

[openwrt/openwrt.git] / target / linux / bcm27xx / patches-6.1 / 950-1252-Improvement-on-backup-switchover-mode-overlay-value-.patch

diff --git a/target/linux/bcm27xx/patches-6.1/950-1252-Improvement-on-backup-switchover-mode-overlay-value-.patch b/target/linux/bcm27xx/patches-6.1/950-1252-Improvement-on-backup-switchover-mode-overlay-value-.patch
new file mode 100644 (file)
index 0000000..9fabd9f
--- /dev/null
+++ b/target/linux/bcm27xx/patches-6.1/950-1252-Improvement-on-backup-switchover-mode-overlay-value-.patch
@@ -0,0 +1,51 @@
+From f85acc3d0fb33ce5c92578dca7b1345915f744ff Mon Sep 17 00:00:00 2001
+From: Tiago Freire <41837236+tiagofreire-pt@users.noreply.github.com>
+Date: Tue, 23 Jan 2024 12:10:24 +0000
+Subject: [PATCH 1252/1295] Improvement on backup-switchover-mode overlay value
+ definitions (#5884)
+
+For the RV3028 RTC, the definitions for its `backup-switchover-mode` overlay
+were not intelligible neither complete/exhaustive.
+
+Accordingly to the https://github.com/raspberrypi/linux/issues/2912#issuecomment-477670051
+these one here proposed should be correct.
+
+`/boot/config.txt` should be as a configuration example, for rv3028, on a
+ Uputronics GPS Extension HAT:
+
+    # For GPS Expansion Board from Uputronics
+    dtparam=i2c_arm=on
+    dtoverlay=i2c-rtc,rv3028,backup-switchover-mode=3
+    dtoverlay=pps-gpio,gpiopin=18
+    init_uart_baud=115200
+
+From my tests (`sudo rmmod rtc_rv3028 && sudo i2cget -y 1 0x52 0x37`):
+
+`Default from factory`: `0x10`
+`Mode 0`: `0x10`
+`Mode 1`: `0x14`
+`Mode 2`: `0x18`
+`Mode 3`: `0x1c`
+
+`Mode 3`: `0x1c` is consistent with the manufacturer configuration script: http://store.uputronics.com/files/configure-rv3028.sh
+---
+ arch/arm/boot/dts/overlays/README | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -2106,7 +2106,13 @@ Params: abx80x                  Select o
+                                 source
+ 
+         backup-switchover-mode  Backup power supply switch mode. Must be 0 for
+-                                off or 1 for Vdd < VBackup (RV3028, RV3032)
++                                "Switchover disabled", 1 for "Direct Switching"
++                                (if Vdd < VBackup), 2 for "Standby
++                                Mode" (if Vdd < Vbackup,
++                                does not draw current) or 3 for
++                                "Level Switching" (if Vdd < Vbackup
++                                and Vdd < Vddsw and Vbackup > Vddsw)
++                                (RV3028, RV3032)
+ 
+ 
+ Name:   i2c-rtc-gpio