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drivers: i2c: Add a dump routine

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Add a function to dump out a set of I2C messages. It uses debug logging
so it only useful for debugging.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-06-04 15:08:13 -06:00 committed by Carles Cufí
parent cae8bd7408
commit 6b50f643da
4 changed files with 57 additions and 0 deletions
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1
CODEOWNERS
View file

@ -184,6 +184,7 @@
/drivers/hwinfo/ @alexanderwachter
/drivers/i2c/*litex* @mateusz-holenko @kgugala @pgielda
/drivers/i2s/i2s_ll_stm32* @avisconti
/drivers/i2c/i2c_common.c @sjg20
/drivers/i2c/i2c_shell.c @nashif
/drivers/ieee802154/ @jukkar @tbursztyka
/drivers/ieee802154/ieee802154_rf2xx* @jukkar @tbursztyka @nandojve

1
drivers/i2c/CMakeLists.txt
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@ -2,6 +2,7 @@
zephyr_library()
zephyr_library_sources(i2c_common.c)
zephyr_library_sources_ifdef(CONFIG_I2C_SHELL i2c_shell.c)
zephyr_library_sources_ifdef(CONFIG_I2C_BITBANG i2c_bitbang.c)
zephyr_library_sources_ifdef(CONFIG_I2C_CC13XX_CC26XX i2c_cc13xx_cc26xx.c)

30
drivers/i2c/i2c_common.c Normal file
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@ -0,0 +1,30 @@
/*
* Logging of I2C messages
*
* Copyright 2020 Google LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include <drivers/i2c.h>
#define LOG_LEVEL CONFIG_I2C_LOG_LEVEL
#include <logging/log.h>
LOG_MODULE_REGISTER(i2c);
void i2c_dump_msgs(const char *name, const struct i2c_msg *msgs,
uint8_t num_msgs, uint16_t addr)
{
LOG_DBG("I2C msg: %s, addr=%x", name, addr);
for (unsigned int i = 0; i < num_msgs; i++) {
const struct i2c_msg *msg = &msgs[i];
LOG_DBG(" %c len=%02x: ",
msg->flags & I2C_MSG_READ ? 'R' : 'W', msg->len);
if (!(msg->flags & I2C_MSG_READ)) {
LOG_HEXDUMP_DBG(msg->buf, msg->len, "contents:");
}
}
}

25
include/drivers/i2c.h
View file

@ -628,6 +628,31 @@ static inline int i2c_reg_update_byte(struct device *dev, uint8_t dev_addr,
return i2c_reg_write_byte(dev, dev_addr, reg_addr, new_value);
}
/**
* @brief Dump out an I2C message
*
* Dumps out a list of I2C messages. For any that are writes (W), the data is
* displayed in hex.
*
* It looks something like this (with name "testing"):
*
* D: I2C msg: testing, addr=56
* D: W len=01:
* D: contents:
* D: 06 |.
* D: W len=0e:
* D: contents:
* D: 00 01 02 03 04 05 06 07 |........
* D: 08 09 0a 0b 0c 0d |......
*
* @param name Name of this dump, displayed at the top.
* @param msgs Array of messages to dump.
* @param num_msgs Number of messages to dump.
* @param addr Address of the I2C target device.
*/
void i2c_dump_msgs(const char *name, const struct i2c_msg *msgs,
uint8_t num_msgs, uint16_t addr);
struct i2c_client_config {
char *i2c_master;
uint16_t i2c_addr;