pca9632: Remove custom software i2c - use normal mcu software i2c instead

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

docs/Config_Changes.md

@@ -8,6 +8,10 @@ All dates in this document are approximate.
 
 ## Changes
 
+20250721: The `[pca9632]` module no longer accepts the `scl_pin` and
+`sda_pin` options.  Use `i2c_software_scl_pin` and
+`i2c_software_sda_pin` instead.
+
 20250428: The maximum `cycle_time` for pwm `[output_pin]`,
 `[pwm_cycle_time]`, `[pwm_tool]`, and similar config sections is now 3
 seconds (reduced from 5 seconds). The `maximum_mcu_duration` in

docs/Config_Reference.md

@@ -3477,11 +3477,6 @@ PCA9632 LED support. The PCA9632 is used on the FlashForge Dreamer.
 #i2c_speed:
 #   See the "common I2C settings" section for a description of the
 #   above parameters.
-#scl_pin:
-#sda_pin:
-#   Alternatively, if the pca9632 is not connected to a hardware I2C
-#   bus, then one may specify the "clock" (scl_pin) and "data"
-#   (sda_pin) pins. The default is to use hardware I2C.
 #color_order: RGBW
 #   Set the pixel order of the LED (using a string containing the
 #   letters R, G, B, W). The default is RGBW.

klippy/extras/pca9632.py

@@ -3,7 +3,7 @@
 # Copyright (C) 2022  Ricardo Alcantara <ricardo@vulcanolabs.com>
 #
 # This file may be distributed under the terms of the GNU GPLv3 license.
-from . import bus, led, mcp4018
+from . import bus, led
 
 BACKGROUND_PRIORITY_CLOCK = 0x7fffffff00000000
 
@@ -25,9 +25,6 @@ PCA9632_LED3 = 0x06
 class PCA9632:
     def __init__(self, config):
         self.printer = printer = config.get_printer()
-        if config.get("scl_pin", None) is not None:
-            self.i2c = mcp4018.SoftwareI2C(config, 98)
-        else:
         self.i2c = bus.MCU_I2C_from_config(config, default_addr=98)
         color_order = config.get("color_order", "RGBW")
         if sorted(color_order) != sorted("RGBW"):

test/klippy/led.cfg

@@ -25,8 +25,8 @@ initial_GREEN: 0.2
 initial_BLUE: 0.3
 
 [pca9632 p6led]
-scl_pin: PB1
-sda_pin: PB2
+i2c_software_scl_pin: PB1
+i2c_software_sda_pin: PB2
 initial_RED: 0.4
 initial_GREEN: 0.5
 initial_BLUE: 0.6