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commit c7702894fe85cf99505d792ffa15bd7f16964701
Author: Eren Terzioglu <eren.terzio...@espressif.com>
AuthorDate: Wed Feb 26 09:16:52 2025 +0100
documentation/esp32[s2|s3]: Add I2C slave support
Add I2C Slave support into docs for xtensa based Espressif devices
Signed-off-by: Eren Terzioglu <eren.terzio...@espressif.com>
---
Documentation/platforms/xtensa/esp32/index.rst | 2 +-
.../xtensa/esp32s2/boards/esp32s2-kaluga-1/index.rst | 17 +++++++++++++++++
.../xtensa/esp32s2/boards/esp32s2-saola-1/index.rst | 17 +++++++++++++++++
Documentation/platforms/xtensa/esp32s2/index.rst | 2 +-
.../xtensa/esp32s3/boards/esp32s3-devkit/index.rst | 18 ++++++++++++++++++
Documentation/platforms/xtensa/esp32s3/index.rst | 2 +-
6 files changed, 55 insertions(+), 3 deletions(-)
diff --git a/Documentation/platforms/xtensa/esp32/index.rst
b/Documentation/platforms/xtensa/esp32/index.rst
index fb4e9020e8..523c1967d2 100644
--- a/Documentation/platforms/xtensa/esp32/index.rst
+++ b/Documentation/platforms/xtensa/esp32/index.rst
@@ -336,7 +336,7 @@ DAC Yes One-shot
eFuse Yes
Ethernet Yes
GPIO Yes
-I2C Yes
+I2C Yes Master and Slave mode supported
I2S Yes
LED_PWM Yes
MCPWM Yes
diff --git
a/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-kaluga-1/index.rst
b/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-kaluga-1/index.rst
index 5e1abc2d5f..a475a0ba7c 100644
--- a/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-kaluga-1/index.rst
+++ b/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-kaluga-1/index.rst
@@ -248,6 +248,23 @@ You can scan for all I2C devices using the following
command::
nsh> i2c dev 0x00 0x7f
+To use slave mode, you can enable `ESP32S2_I2S_ROLE_SLAVE` option.
+To use slave mode driver following snippet demonstrates how write to i2c bus
+using slave driver:
+
+.. code-block:: C
+
+ #define ESP_I2C_SLAVE_PATH "/dev/i2cslv0"
+ int main(int argc, char *argv[])
+ {
+ int i2c_slave_fd;
+ int ret;
+ uint8_t buffer[5] = {0xAA};
+ i2c_slave_fd = open(ESP_I2C_SLAVE_PATH, O_RDWR);
+ ret = write(i2c_slave_fd, buffer, 5);
+ close(i2c_slave_fd);
+ }
+
lvgl_ili9341
------------
diff --git
a/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst
b/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst
index edebe5a882..2929fc3e32 100644
--- a/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst
+++ b/Documentation/platforms/xtensa/esp32s2/boards/esp32s2-saola-1/index.rst
@@ -209,6 +209,23 @@ You can scan for all I2C devices using the following
command::
nsh> i2c dev 0x00 0x7f
+To use slave mode, you can enable `ESP32S2_I2S_ROLE_SLAVE` option.
+To use slave mode driver following snippet demonstrates how write to i2c bus
+using slave driver:
+
+.. code-block:: C
+
+ #define ESP_I2C_SLAVE_PATH "/dev/i2cslv0"
+ int main(int argc, char *argv[])
+ {
+ int i2c_slave_fd;
+ int ret;
+ uint8_t buffer[5] = {0xAA};
+ i2c_slave_fd = open(ESP_I2C_SLAVE_PATH, O_RDWR);
+ ret = write(i2c_slave_fd, buffer, 5);
+ close(i2c_slave_fd);
+ }
+
i2schar
-------
diff --git a/Documentation/platforms/xtensa/esp32s2/index.rst
b/Documentation/platforms/xtensa/esp32s2/index.rst
index 2745550d15..3c07f03938 100644
--- a/Documentation/platforms/xtensa/esp32s2/index.rst
+++ b/Documentation/platforms/xtensa/esp32s2/index.rst
@@ -323,7 +323,7 @@ DMA Yes
eFuse No
Ethernet No
GPIO Yes
-I2C Yes
+I2C Yes Master and Slave mode supported
I2S Yes
LED_PWM No
Pulse_CNT Yes
diff --git
a/Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst
b/Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst
index a26d244dd2..a0e3c6080d 100644
--- a/Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst
+++ b/Documentation/platforms/xtensa/esp32s3/boards/esp32s3-devkit/index.rst
@@ -242,6 +242,24 @@ You can scan for all I2C devices using the following
command::
nsh> i2c dev 0x00 0x7f
+To use slave mode, you can enable `ESP32S3_I2S0_ROLE_SLAVE` or
+`ESP32S3_I2S1_ROLE_SLAVE` option.
+To use slave mode driver following snippet demonstrates how write to i2c bus
+using slave driver:
+
+.. code-block:: C
+
+ #define ESP_I2C_SLAVE_PATH "/dev/i2cslv0"
+ int main(int argc, char *argv[])
+ {
+ int i2c_slave_fd;
+ int ret;
+ uint8_t buffer[5] = {0xAA};
+ i2c_slave_fd = open(ESP_I2C_SLAVE_PATH, O_RDWR);
+ ret = write(i2c_slave_fd, buffer, 5);
+ close(i2c_slave_fd);
+ }
+
knsh
----
diff --git a/Documentation/platforms/xtensa/esp32s3/index.rst
b/Documentation/platforms/xtensa/esp32s3/index.rst
index 605e1d9afa..cc79ddf215 100644
--- a/Documentation/platforms/xtensa/esp32s3/index.rst
+++ b/Documentation/platforms/xtensa/esp32s3/index.rst
@@ -356,7 +356,7 @@ CAN/TWAI Yes
DMA Yes
eFuse No
GPIO Yes
-I2C No
+I2C Yes Master and Slave mode supported
I2S Yes
LCD No
LED_PWM No
