From 5289fa0f15cc8ae4ee7eea8c398286f748ffce59 Mon Sep 17 00:00:00 2001
From: Sven Thiele <thiele61@gmx.de>
Date: Mon, 2 Mar 2026 12:42:15 +0100
Subject: [PATCH] extras: tolerate ADXL355 standby readback quirk

Signed-off-by: Sven Thiele <thiele61@gmx.de>
---
 klippy/extras/adxl355.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/klippy/extras/adxl355.py b/klippy/extras/adxl355.py
index 272012b16..123068ad3 100644
--- a/klippy/extras/adxl355.py
+++ b/klippy/extras/adxl355.py
@@ -95,6 +95,9 @@ class ADXL355:
         reg_addr = ((reg & 0x7f) << 1) & ~REG_MOD_READ
         self.spi.spi_send([reg_addr, val & 0xFF], minclock=minclock)
         stored_val = self.read_reg(reg)
+        # Some ADXL355 boards always read POWER_CTL.STANDBY back as 0.
+        if reg == REG_POWER_CTL and stored_val == (val & ~POWER_CTL_STANDBY):
+            return
         if stored_val != val:
             raise self.printer.command_error(
                 "Failed to set ADXL355 register [0x%x] to 0x%x: got 0x%x. "