chore(core/embed): remove unused legacy i2c driver

[no changelog]

core/embed/bootloader/main.c

@@ -42,9 +42,6 @@
 #include "dma2d.h"
 #endif
 #endif
-#ifdef USE_I2C
-#include "i2c.h"
-#endif
 #ifdef USE_OPTIGA
 #include "optiga_hal.h"
 #endif
@@ -373,10 +370,6 @@ int bootloader_main(void) {
   hash_processor_init();
 #endif
 
-#ifdef USE_I2C
-  i2c_init();
-#endif
-
   display_init(DISPLAY_RETAIN_CONTENT);
 
 #ifdef USE_DMA2D

core/embed/firmware/main.c

@@ -72,9 +72,6 @@
 #ifdef USE_BUTTON
 #include "button.h"
 #endif
-#ifdef USE_I2C
-#include "i2c.h"
-#endif
 #ifdef USE_TOUCH
 #include "touch.h"
 #endif
@@ -207,10 +204,6 @@ int main(void) {
   consumption_mask_init();
 #endif
 
-#ifdef USE_I2C
-  i2c_init();
-#endif
-
 #ifdef USE_TOUCH
   touch_init();
 #endif

core/embed/prodtest/main.c

@@ -35,7 +35,6 @@
 #include "flash.h"
 #include "flash_otp.h"
 #include "fwutils.h"
-#include "i2c.h"
 #include "image.h"
 #include "model.h"
 #include "mpu.h"
@@ -796,9 +795,6 @@ int main(void) {
 #ifdef USE_BUTTON
   button_init();
 #endif
-#ifdef USE_I2C
-  i2c_init();
-#endif
 #ifdef USE_TOUCH
   touch_init();
 #endif

core/embed/trezorhal/i2c.h

@@ -1,38 +0,0 @@
-/*
- * This file is part of the Trezor project, https://trezor.io/
- *
- * Copyright (c) SatoshiLabs
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef TREZORHAL_I2C_H
-#define TREZORHAL_I2C_H
-
-#include STM32_HAL_H
-
-void i2c_init(void);
-void i2c_cycle(uint16_t idx);
-HAL_StatusTypeDef i2c_transmit(uint16_t idx, uint8_t addr, uint8_t *data,
-                               uint16_t len, uint32_t timeout);
-HAL_StatusTypeDef i2c_receive(uint16_t idx, uint8_t addr, uint8_t *data,
-                              uint16_t len, uint32_t timeout);
-HAL_StatusTypeDef i2c_mem_write(uint16_t idx, uint8_t addr, uint16_t mem_addr,
-                                uint16_t mem_addr_size, uint8_t *data,
-                                uint16_t len, uint32_t timeout);
-HAL_StatusTypeDef i2c_mem_read(uint16_t idx, uint8_t addr, uint16_t mem_addr,
-                               uint16_t mem_addr_size, uint8_t *data,
-                               uint16_t len, uint32_t timeout);
-
-#endif  // TREZORHAL_I2C_H

core/embed/trezorhal/stm32f4/i2c.c

@@ -1,199 +0,0 @@
-
-
-#include STM32_HAL_H
-#include TREZOR_BOARD
-#include "i2c.h"
-#include "common.h"
-
-static I2C_HandleTypeDef i2c_handle[I2C_COUNT];
-
-typedef struct {
-  I2C_TypeDef *Instance;
-  GPIO_TypeDef *SclPort;
-  GPIO_TypeDef *SdaPort;
-  uint16_t SclPin;
-  uint16_t SdaPin;
-  uint8_t PinAF;
-  uint32_t Reset;
-} i2c_instance_t;
-
-i2c_instance_t i2c_defs[I2C_COUNT] = {
-    {
-        .Instance = I2C_INSTANCE_0,
-        .SclPort = I2C_INSTANCE_0_SCL_PORT,
-        .SdaPort = I2C_INSTANCE_0_SDA_PORT,
-        .SclPin = I2C_INSTANCE_0_SCL_PIN,
-        .SdaPin = I2C_INSTANCE_0_SDA_PIN,
-        .PinAF = I2C_INSTANCE_0_PIN_AF,
-        .Reset = I2C_INSTANCE_0_RESET_BIT,
-    },
-#ifdef I2C_INSTANCE_1
-    {
-        .Instance = I2C_INSTANCE_1,
-        .SclPort = I2C_INSTANCE_1_SCL_PORT,
-        .SdaPort = I2C_INSTANCE_1_SDA_PORT,
-        .SclPin = I2C_INSTANCE_1_SCL_PIN,
-        .SdaPin = I2C_INSTANCE_1_SDA_PIN,
-        .PinAF = I2C_INSTANCE_1_PIN_AF,
-        .Reset = I2C_INSTANCE_1_RESET_BIT,
-    },
-#endif
-
-};
-
-void i2c_init_instance(uint16_t idx, i2c_instance_t *instance) {
-  if (i2c_handle[idx].Instance) {
-    return;
-  }
-
-  GPIO_InitTypeDef GPIO_InitStructure = {0};
-
-  // configure CTP I2C SCL and SDA GPIO lines
-  GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
-  GPIO_InitStructure.Pull = GPIO_NOPULL;
-  GPIO_InitStructure.Speed =
-      GPIO_SPEED_FREQ_LOW;  // I2C is a KHz bus and low speed is still good into
-  // the low MHz
-
-  GPIO_InitStructure.Alternate = instance->PinAF;
-  GPIO_InitStructure.Pin = instance->SclPin;
-  HAL_GPIO_Init(instance->SclPort, &GPIO_InitStructure);
-
-  GPIO_InitStructure.Alternate = instance->PinAF;
-  GPIO_InitStructure.Pin = instance->SdaPin;
-  HAL_GPIO_Init(instance->SdaPort, &GPIO_InitStructure);
-
-  i2c_handle[idx].Instance = instance->Instance;
-  i2c_handle[idx].Init.ClockSpeed = 200000;
-  i2c_handle[idx].Init.DutyCycle = I2C_DUTYCYCLE_16_9;
-  i2c_handle[idx].Init.OwnAddress1 = 0xFE;  // master
-  i2c_handle[idx].Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
-  i2c_handle[idx].Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
-  i2c_handle[idx].Init.OwnAddress2 = 0;
-  i2c_handle[idx].Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
-  i2c_handle[idx].Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
-
-  if (HAL_OK != HAL_I2C_Init(&i2c_handle[idx])) {
-    error_shutdown("I2C was not loaded properly.");
-    return;
-  }
-}
-
-void i2c_init(void) {
-  // enable I2C clock
-  I2C_INSTANCE_0_CLK_EN();
-  I2C_INSTANCE_0_SCL_CLK_EN();
-  I2C_INSTANCE_0_SDA_CLK_EN();
-
-  i2c_init_instance(0, &i2c_defs[0]);
-
-#ifdef I2C_INSTANCE_1
-  I2C_INSTANCE_1_CLK_EN();
-  I2C_INSTANCE_1_SCL_CLK_EN();
-  I2C_INSTANCE_1_SDA_CLK_EN();
-  i2c_init_instance(1, &i2c_defs[1]);
-#endif
-}
-
-void i2c_deinit(uint16_t idx) {
-  if (i2c_handle[idx].Instance) {
-    HAL_I2C_DeInit(&i2c_handle[idx]);
-    i2c_handle[idx].Instance = NULL;
-  }
-}
-
-void i2c_ensure_pin(GPIO_TypeDef *port, uint16_t GPIO_Pin,
-                    GPIO_PinState PinState) {
-  HAL_GPIO_WritePin(port, GPIO_Pin, PinState);
-  while (HAL_GPIO_ReadPin(port, GPIO_Pin) != PinState)
-    ;
-}
-
-// I2C cycle described in section 2.9.7 of STM CD00288116 Errata sheet
-//
-// https://www.st.com/content/ccc/resource/technical/document/errata_sheet/7f/05/b0/bc/34/2f/4c/21/CD00288116.pdf/files/CD00288116.pdf/jcr:content/translations/en.CD00288116.pdf
-
-void i2c_cycle(uint16_t idx) {
-  i2c_instance_t *instance = &i2c_defs[0];
-
-  // 1. Disable I2C peripheral
-  i2c_deinit(idx);
-
-  // 2. Configure SCL/SDA as GPIO OUTPUT Open Drain
-  GPIO_InitTypeDef GPIO_InitStructure = {0};
-  GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD;
-  GPIO_InitStructure.Pull = GPIO_NOPULL;
-  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
-  GPIO_InitStructure.Pin = instance->SdaPin;
-  HAL_GPIO_Init(instance->SdaPort, &GPIO_InitStructure);
-  GPIO_InitStructure.Pin = instance->SclPin;
-  HAL_GPIO_Init(instance->SclPort, &GPIO_InitStructure);
-  HAL_Delay(50);
-
-  // 3. Check SCL and SDA High level
-  i2c_ensure_pin(instance->SclPort, instance->SclPin, GPIO_PIN_SET);
-  i2c_ensure_pin(instance->SdaPort, instance->SdaPin, GPIO_PIN_SET);
-  // 4+5. Check SDA Low level
-  i2c_ensure_pin(instance->SdaPort, instance->SdaPin, GPIO_PIN_RESET);
-  // 6+7. Check SCL Low level
-  i2c_ensure_pin(instance->SclPort, instance->SclPin, GPIO_PIN_RESET);
-  // 8+9. Check SCL High level
-  i2c_ensure_pin(instance->SclPort, instance->SclPin, GPIO_PIN_SET);
-  // 10+11.  Check SDA High level
-  i2c_ensure_pin(instance->SclPort, instance->SdaPin, GPIO_PIN_SET);
-
-  // 12. Configure SCL/SDA as Alternate function Open-Drain
-  GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
-  GPIO_InitStructure.Pull = GPIO_NOPULL;
-  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
-  GPIO_InitStructure.Alternate = instance->PinAF;
-  GPIO_InitStructure.Pin = instance->SclPin;
-  HAL_GPIO_Init(instance->SclPort, &GPIO_InitStructure);
-  GPIO_InitStructure.Pin = instance->SdaPin;
-  HAL_GPIO_Init(instance->SdaPort, &GPIO_InitStructure);
-  HAL_Delay(50);
-
-  // 13. Force reset
-  RCC->APB1RSTR |= instance->Reset;
-
-  HAL_Delay(50);
-
-  // 14. Release reset
-  RCC->APB1RSTR &= ~instance->Reset;
-
-  // 15. Enable the I2C peripheral
-  i2c_init_instance(idx, instance);
-  HAL_Delay(10);
-}
-
-HAL_StatusTypeDef i2c_transmit(uint16_t idx, uint8_t addr, uint8_t *data,
-                               uint16_t len, uint32_t timeout) {
-  return HAL_I2C_Master_Transmit(&i2c_handle[idx], addr, data, len, timeout);
-}
-
-HAL_StatusTypeDef i2c_receive(uint16_t idx, uint8_t addr, uint8_t *data,
-                              uint16_t len, uint32_t timeout) {
-  HAL_StatusTypeDef ret =
-      HAL_I2C_Master_Receive(&i2c_handle[idx], addr, data, len, timeout);
-#ifdef USE_OPTIGA
-  if (idx == OPTIGA_I2C_INSTANCE) {
-    // apply GUARD_TIME as specified by the OPTIGA datasheet
-    // (only applies to the I2C bus to which the OPTIGA is connected)
-    hal_delay_us(50);
-  }
-#endif
-  return ret;
-}
-
-HAL_StatusTypeDef i2c_mem_write(uint16_t idx, uint8_t addr, uint16_t mem_addr,
-                                uint16_t mem_addr_size, uint8_t *data,
-                                uint16_t len, uint32_t timeout) {
-  return HAL_I2C_Mem_Write(&i2c_handle[idx], addr, mem_addr, mem_addr_size,
-                           data, len, timeout);
-}
-HAL_StatusTypeDef i2c_mem_read(uint16_t idx, uint8_t addr, uint16_t mem_addr,
-                               uint16_t mem_addr_size, uint8_t *data,
-                               uint16_t len, uint32_t timeout) {
-  return HAL_I2C_Mem_Read(&i2c_handle[idx], addr, mem_addr, mem_addr_size, data,
-                          len, timeout);
-}

core/embed/trezorhal/stm32u5/i2c.c

@@ -1,179 +0,0 @@
-
-
-#include STM32_HAL_H
-#include TREZOR_BOARD
-#include "i2c.h"
-#include "common.h"
-
-static I2C_HandleTypeDef i2c_handle[I2C_COUNT];
-
-typedef struct {
-  I2C_TypeDef *Instance;
-  GPIO_TypeDef *SclPort;
-  GPIO_TypeDef *SdaPort;
-  uint16_t SclPin;
-  uint16_t SdaPin;
-  uint8_t PinAF;
-  volatile uint32_t *ResetReg;
-  uint32_t ResetBit;
-} i2c_instance_t;
-
-i2c_instance_t i2c_defs[I2C_COUNT] = {
-    {
-        .Instance = I2C_INSTANCE_0,
-        .SclPort = I2C_INSTANCE_0_SCL_PORT,
-        .SdaPort = I2C_INSTANCE_0_SDA_PORT,
-        .SclPin = I2C_INSTANCE_0_SCL_PIN,
-        .SdaPin = I2C_INSTANCE_0_SDA_PIN,
-        .PinAF = I2C_INSTANCE_0_PIN_AF,
-        .ResetReg = I2C_INSTANCE_0_RESET_REG,
-        .ResetBit = I2C_INSTANCE_0_RESET_BIT,
-    },
-#ifdef I2C_INSTANCE_1
-    {
-        .Instance = I2C_INSTANCE_1,
-        .SclPort = I2C_INSTANCE_1_SCL_PORT,
-        .SdaPort = I2C_INSTANCE_1_SDA_PORT,
-        .SclPin = I2C_INSTANCE_1_SCL_PIN,
-        .SdaPin = I2C_INSTANCE_1_SDA_PIN,
-        .PinAF = I2C_INSTANCE_1_PIN_AF,
-        .ResetReg = I2C_INSTANCE_1_RESET_REG,
-        .ResetBit = I2C_INSTANCE_1_RESET_BIT,
-    },
-#endif
-#ifdef I2C_INSTANCE_2
-    {
-        .Instance = I2C_INSTANCE_2,
-        .SclPort = I2C_INSTANCE_2_SCL_PORT,
-        .SdaPort = I2C_INSTANCE_2_SDA_PORT,
-        .SclPin = I2C_INSTANCE_2_SCL_PIN,
-        .SdaPin = I2C_INSTANCE_2_SDA_PIN,
-        .PinAF = I2C_INSTANCE_2_PIN_AF,
-        .ResetReg = I2C_INSTANCE_2_RESET_REG,
-        .ResetBit = I2C_INSTANCE_2_RESET_BIT,
-    },
-#endif
-
-};
-
-/*
- * Using calculation from STM32CubeMX
- * PCLKx as source, assumed 160MHz
- * Fast mode, freq = 400kHz, Rise time = 250ns, Fall time = 100ns
- * Fast mode, freq = 200kHz, Rise time = 250ns, Fall time = 100ns
- * SCLH and SCLL are manually modified to achieve more symmetric clock
- */
-#define I2C_TIMING_400000_Hz 0x30D22728
-#define I2C_TIMING_200000_Hz 0x30D2595A
-#define I2C_TIMING I2C_TIMING_200000_Hz
-
-void i2c_init_instance(uint16_t idx, i2c_instance_t *instance) {
-  if (i2c_handle[idx].Instance) {
-    return;
-  }
-
-  GPIO_InitTypeDef GPIO_InitStructure = {0};
-
-  // configure CTP I2C SCL and SDA GPIO lines
-  GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
-  GPIO_InitStructure.Pull = GPIO_NOPULL;
-  GPIO_InitStructure.Speed =
-      GPIO_SPEED_FREQ_LOW;  // I2C is a KHz bus and low speed is still good into
-  // the low MHz
-
-  GPIO_InitStructure.Alternate = instance->PinAF;
-  GPIO_InitStructure.Pin = instance->SclPin;
-  HAL_GPIO_Init(instance->SclPort, &GPIO_InitStructure);
-
-  GPIO_InitStructure.Alternate = instance->PinAF;
-  GPIO_InitStructure.Pin = instance->SdaPin;
-  HAL_GPIO_Init(instance->SdaPort, &GPIO_InitStructure);
-
-  i2c_handle[idx].Instance = instance->Instance;
-  i2c_handle[idx].Init.Timing = I2C_TIMING;
-  i2c_handle[idx].Init.OwnAddress1 = 0xFE;  // master
-  i2c_handle[idx].Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
-  i2c_handle[idx].Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
-  i2c_handle[idx].Init.OwnAddress2 = 0;
-  i2c_handle[idx].Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
-  i2c_handle[idx].Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
-
-  if (HAL_OK != HAL_I2C_Init(&i2c_handle[idx])) {
-    error_shutdown("I2C was not loaded properly.");
-    return;
-  }
-}
-
-void i2c_init(void) {
-  // enable I2C clock
-  I2C_INSTANCE_0_CLK_EN();
-  I2C_INSTANCE_0_SCL_CLK_EN();
-  I2C_INSTANCE_0_SDA_CLK_EN();
-  i2c_init_instance(0, &i2c_defs[0]);
-
-#ifdef I2C_INSTANCE_1
-  I2C_INSTANCE_1_CLK_EN();
-  I2C_INSTANCE_1_SCL_CLK_EN();
-  I2C_INSTANCE_1_SDA_CLK_EN();
-  i2c_init_instance(1, &i2c_defs[1]);
-#endif
-
-#ifdef I2C_INSTANCE_2
-  I2C_INSTANCE_2_CLK_EN();
-  I2C_INSTANCE_2_SCL_CLK_EN();
-  I2C_INSTANCE_2_SDA_CLK_EN();
-  i2c_init_instance(2, &i2c_defs[2]);
-#endif
-}
-
-void i2c_deinit(uint16_t idx) {
-  if (i2c_handle[idx].Instance) {
-    HAL_I2C_DeInit(&i2c_handle[idx]);
-    i2c_handle[idx].Instance = NULL;
-  }
-}
-
-void i2c_ensure_pin(GPIO_TypeDef *port, uint16_t GPIO_Pin,
-                    GPIO_PinState PinState) {
-  HAL_GPIO_WritePin(port, GPIO_Pin, PinState);
-  while (HAL_GPIO_ReadPin(port, GPIO_Pin) != PinState)
-    ;
-}
-
-void i2c_cycle(uint16_t idx) {
-  SET_BIT(*i2c_defs[idx].ResetReg, i2c_defs[idx].ResetBit);
-  CLEAR_BIT(*i2c_defs[idx].ResetReg, i2c_defs[idx].ResetBit);
-}
-
-HAL_StatusTypeDef i2c_transmit(uint16_t idx, uint8_t addr, uint8_t *data,
-                               uint16_t len, uint32_t timeout) {
-  return HAL_I2C_Master_Transmit(&i2c_handle[idx], addr, data, len, timeout);
-}
-
-HAL_StatusTypeDef i2c_receive(uint16_t idx, uint8_t addr, uint8_t *data,
-                              uint16_t len, uint32_t timeout) {
-  HAL_StatusTypeDef ret =
-      HAL_I2C_Master_Receive(&i2c_handle[idx], addr, data, len, timeout);
-#ifdef USE_OPTIGA
-  if (idx == OPTIGA_I2C_INSTANCE) {
-    // apply GUARD_TIME as specified by the OPTIGA datasheet
-    // (only applies to the I2C bus to which the OPTIGA is connected)
-    hal_delay_us(50);
-  }
-#endif
-
-  return ret;
-}
-
-HAL_StatusTypeDef i2c_mem_write(uint16_t idx, uint8_t addr, uint16_t mem_addr,
-                                uint16_t mem_addr_size, uint8_t *data,
-                                uint16_t len, uint32_t timeout) {
-  return HAL_I2C_Mem_Write(&i2c_handle[idx], addr, mem_addr, mem_addr_size,
-                           data, len, timeout);
-}
-HAL_StatusTypeDef i2c_mem_read(uint16_t idx, uint8_t addr, uint16_t mem_addr,
-                               uint16_t mem_addr_size, uint8_t *data,
-                               uint16_t len, uint32_t timeout) {
-  return HAL_I2C_Mem_Read(&i2c_handle[idx], addr, mem_addr, mem_addr_size, data,
-                          len, timeout);
-}

core/site_scons/models/D001/discovery.py

@@ -72,7 +72,6 @@ def configure(
         features_available.append("display_rgb565")
 
     if "input" in features_wanted:
-        sources += ["embed/trezorhal/stm32f4/i2c.c"]
         sources += ["embed/trezorhal/stm32f4/i2c_bus.c"]
         sources += ["embed/trezorhal/stm32f4/touch/stmpe811.c"]
         features_available.append("touch")

core/site_scons/models/D002/discovery2.py

@@ -57,9 +57,6 @@ def configure(
         ]
 
     if "input" in features_wanted:
-        sources += [
-            "embed/trezorhal/stm32u5/i2c.c",
-        ]
         sources += ["embed/trezorhal/stm32u5/i2c_bus.c"]
         sources += ["embed/trezorhal/stm32u5/touch/sitronix.c"]
         features_available.append("touch")

core/site_scons/models/T2B1/trezor_r_v10.py

@@ -48,11 +48,6 @@ def configure(
     else:
         sources += [f"embed/trezorhal/stm32f4/displays/{display}"]
 
-    sources += [
-        "embed/trezorhal/stm32f4/i2c.c",
-        "embed/trezorhal/stm32f4/i2c_bus.c",
-    ]
-
     if "input" in features_wanted:
         sources += ["embed/trezorhal/stm32f4/button.c"]
         features_available.append("button")

core/site_scons/models/T2T1/trezor_t.py

@@ -82,7 +82,6 @@ def configure(
     features_available.append("backlight")
 
     if "input" in features_wanted:
-        sources += ["embed/trezorhal/stm32f4/i2c.c"]
         sources += ["embed/trezorhal/stm32f4/i2c_bus.c"]
         sources += ["embed/trezorhal/stm32f4/touch/ft6x36.c"]
         features_available.append("touch")

core/site_scons/models/T3B1/trezor_t3b1_revB.py

@@ -73,7 +73,6 @@ def configure(
 
     if "optiga" in features_wanted:
         defines += ["USE_OPTIGA=1"]
-        sources += ["embed/trezorhal/stm32u5/i2c.c"]
         sources += ["embed/trezorhal/stm32u5/i2c_bus.c"]
         sources += ["embed/trezorhal/stm32u5/optiga_hal.c"]
         sources += ["embed/trezorhal/optiga/optiga.c"]

core/site_scons/models/T3T1/trezor_t3t1_revE.py

@@ -71,7 +71,6 @@ def configure(
     features_available.append("backlight")
 
     if "input" in features_wanted:
-        sources += ["embed/trezorhal/stm32u5/i2c.c"]
         sources += ["embed/trezorhal/stm32u5/i2c_bus.c"]
         sources += ["embed/trezorhal/stm32u5/touch/ft6x36.c"]
         sources += ["embed/trezorhal/stm32u5/touch/panels/lx154a2422cpt23.c"]

core/site_scons/models/T3T1/trezor_t3t1_v4.py

@@ -75,7 +75,6 @@ def configure(
     features_available.append("backlight")
 
     if "input" in features_wanted:
-        sources += ["embed/trezorhal/stm32u5/i2c.c"]
         sources += ["embed/trezorhal/stm32u5/i2c_bus.c"]
         sources += ["embed/trezorhal/stm32u5/touch/ft6x36.c"]
         features_available.append("touch")