Initial commit

target/linux/bcm27xx/patches-6.6/950-0966-overlays-i2c-mux-Add-base-parameter.patch

@@ -0,0 +1,51 @@
+From 841bb8e98b3383fdb98b43251923b94e6c86f1cf Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Thu, 14 Mar 2024 10:05:58 +0000
+Subject: [PATCH 0966/1085] overlays: i2c-mux: Add 'base' parameter
+
+Add a 'base' parameter to set an explicit bus number for the channels,
+where the requested bus number is base + channel ID.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/README              | 3 +++
+ arch/arm/boot/dts/overlays/i2c-mux-overlay.dts | 4 ++++
+ drivers/i2c/i2c-mux.c                          | 2 +-
+ 3 files changed, 8 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -2026,6 +2026,9 @@ Params: pca9542                 Select t
+ 
+         addr                    Change I2C address of the device (default 0x70)
+ 
++        base                    Set an explicit base value for the channel bus
++                                numbers
++
+         i2c0                    Choose the I2C0 bus on GPIOs 0&1
+ 
+         i2c_csi_dsi             Choose the I2C0 bus on GPIOs 44&45
+--- a/arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
++++ b/arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
+@@ -159,6 +159,10 @@
+ 			<&pca9545>,"reg:0",
+ 			<&pca9548>,"reg:0";
+ 
++		base =  <&pca9542>,"base-nr:0",
++			<&pca9545>,"base-nr:0",
++			<&pca9548>,"base-nr:0";
++
+ 		i2c0 = <&frag100>, "target:0=",<&i2c0>,
+ 			      <0>,"+101+102";
+ 		i2c_csi_dsi = <&frag100>, "target:0=",<&i2c_csi_dsi>,
+--- a/drivers/i2c/i2c-mux.c
++++ b/drivers/i2c/i2c-mux.c
+@@ -360,7 +360,7 @@ int i2c_mux_add_adapter(struct i2c_mux_c
+ 
+ 		of_property_read_u32(dev_node, "base-nr", &base_nr);
+ 		if (!force_nr)
+-			force_nr = base_nr;
++			force_nr = base_nr + chan_id;
+ 
+ 		if (muxc->arbitrator)
+ 			mux_node = of_get_child_by_name(dev_node, "i2c-arb");