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bdk: pinmux: always detach I2C4 pins from I2C3 pm

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Generally I2C3 communication can work via I2C3 or I2C4 pins.
Defaults are fine as long as one of the pin groups are floating or grounded or
both share I2C traces.

In NX boards I2C4 SDA is used for GC and connected to 1V8.
So if a GC is slotted, I2C3 works, if not, no communication is possible.

This config was done previously inside I2C3 consumer driver (touchscreen).
Now it's moved inside pinmux_config_i2c.
This commit is contained in:
CTCaer
2026-01-21 23:49:59 +02:00
parent 9c62a590f0
commit 0da69efd07
2 changed files with 11 additions and 7 deletions
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10
bdk/soc/pinmux.c
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@@ -1,6 +1,6 @@
/*
* Copyright (c) 2018 naehrwert
* Copyright (c) 2018-2024 CTCaer
* Copyright (c) 2018-2026 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -15,6 +15,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <soc/i2c.h>
#include <soc/pinmux.h>
#include <soc/t210.h>
@@ -30,6 +31,13 @@ void pinmux_config_i2c(u32 idx)
{
PINMUX_AUX(PINMUX_AUX_X_I2C_SCL(idx)) = PINMUX_INPUT_ENABLE;
PINMUX_AUX(PINMUX_AUX_X_I2C_SDA(idx)) = PINMUX_INPUT_ENABLE;
// Detach I2C4 pins from I2C3 function.
if (idx == I2C_3 || idx == I2C_4)
{
PINMUX_AUX(PINMUX_AUX_X_I2C_SCL(I2C_4)) |= 1;
PINMUX_AUX(PINMUX_AUX_X_I2C_SDA(I2C_4)) |= 1;
}
}
void pinmux_config_i2s(u32 idx)