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8c405cdccc
The patches were generated from the RPi repo with the following command: git format-patch v6.6.34..rpi-6.1.y Some patches needed rebasing and, as usual, the applied and reverted, wireless drivers, Github workflows, READMEs and defconfigs patches were removed. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
52 lines
1.8 KiB
Diff
52 lines
1.8 KiB
Diff
From 841bb8e98b3383fdb98b43251923b94e6c86f1cf Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Thu, 14 Mar 2024 10:05:58 +0000
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Subject: [PATCH 0966/1085] overlays: i2c-mux: Add 'base' parameter
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Add a 'base' parameter to set an explicit bus number for the channels,
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where the requested bus number is base + channel ID.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/overlays/README | 3 +++
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arch/arm/boot/dts/overlays/i2c-mux-overlay.dts | 4 ++++
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drivers/i2c/i2c-mux.c | 2 +-
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3 files changed, 8 insertions(+), 1 deletion(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -2026,6 +2026,9 @@ Params: pca9542 Select t
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addr Change I2C address of the device (default 0x70)
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+ base Set an explicit base value for the channel bus
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+ numbers
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+
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i2c0 Choose the I2C0 bus on GPIOs 0&1
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i2c_csi_dsi Choose the I2C0 bus on GPIOs 44&45
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--- a/arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
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@@ -159,6 +159,10 @@
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<&pca9545>,"reg:0",
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<&pca9548>,"reg:0";
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+ base = <&pca9542>,"base-nr:0",
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+ <&pca9545>,"base-nr:0",
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+ <&pca9548>,"base-nr:0";
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+
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i2c0 = <&frag100>, "target:0=",<&i2c0>,
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<0>,"+101+102";
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i2c_csi_dsi = <&frag100>, "target:0=",<&i2c_csi_dsi>,
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--- a/drivers/i2c/i2c-mux.c
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+++ b/drivers/i2c/i2c-mux.c
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@@ -360,7 +360,7 @@ int i2c_mux_add_adapter(struct i2c_mux_c
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of_property_read_u32(dev_node, "base-nr", &base_nr);
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if (!force_nr)
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- force_nr = base_nr;
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+ force_nr = base_nr + chan_id;
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if (muxc->arbitrator)
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mux_node = of_get_child_by_name(dev_node, "i2c-arb");
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