Different nRF52 devices have different maximum TWI DMA transfer size,
and it's easy to hit the limit with i2c displays on nrf52832 (8 bit) and
nrf52810 (10 bit). Currently neither the driver or the hal validate the
limit, leading to random NACK errors when trying to transfer more data.
Add a check on the driver to fail gracefully when going over the limit.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
DTS property attributes are (by default) not required.
Explicitly specifying `required: false` is redundant.
Perhaps a warning to that effect would be useful.
Signed-off-by: Chris Friedt <cfriedt@meta.com>
-pin properties, e.g. tx-pin have been replaced by pinctrl. Mark them as
deprecated since old pin configuration schemes will be deprecated in
Zephyr 3.2.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Add support for the new pinctrl API to the I2C drivers that handle
the nRF TWI and TWIM peripherals. Update code of the drivers and
related devicetree bindings.
Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
These changes turn out to have been incompatible with the way pinctrl
drivers are going to work, so we need to go back to what we had before
until we can agree on a better approach.
Squash of the following reverts:
Revert "boards: nrf: fix deprecated I2C properties"
This reverts commit 2a4ac9ac02.
Revert "samples: switch nrf overlays to sda-gpios, scl-gpios"
This reverts commit 01bb08e7d8.
Revert "boards: nrf: switch to sda-gpios, scl-gpios"
This reverts commit 17a66304c4.
Revert "i2c: nordic: switch to phandle arrays for pinmux"
This reverts commit 821c03a14a.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Deprecate the scl-pin and sda-pin properties in the devicetree.
Provide new scl-gpios and sda-gpios properties instead.
This lets the user specify SCL and SDA like this:
&i2c0 {
scl-gpios = <&gpio0 1 0>;
sda-gpios = <&gpio1 4 0>;
};
Instead of having to use:
&i2c0 {
scl-pin = <1>;
sda-pin = <36>;
};
Provide error checking and understandable error messages for invalid
configurations.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Add some details to help new users learn how to manage the nodes
for compatibles corresponding to IP blocks on Nordic SoCs.
The focus is on IP blocks where the pinmux is configured in
devicetree. These typically have individual properties for each pin,
like a SCK pin on a SPI peripheral, which correspond directly to a
PSEL register value. These violate the usual devicetree convention of
using a 'foo-gpios <&gpioX ...>' phandle property and work in ways
that only make sense if you understand the underlying register map, so
it's worth explaining them a bit more carefully.
Skip these two bindings, which have no drivers: nordic,nrf-i2s.yaml,
nordic,nrf-pdm.yaml.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
This commit introduces separate "compatible" strings for dts nodes
representing different types of Nordic TWI peripherals. Previously
"nordic,nrf-i2c" was used for both TWI and TWIM, and TWIS was not
supported.
Quite a few files need to be touched by this commit but the changes can
be divided into groups of related or very similar ones, distinguishable
by the initial part of the path to the modified file:
* dts/bindings/i2c/
new bindings for "nordic,nrf-twim" and "nordic,nrf-twis" are added
and the one for "nordic,nrf-i2s" is renamed to "nordic,nrf-twi",
common fields for all these bindings are extracted to a shared file
* dts/arm/nordic/
"compatible" properties in i2cX nodes are updated (when there is no
choice as only one type of TWI peripheral is available) or replaced
with a comment pointing out that the proper type of peripheral needs
to be picked at some upper layer
* drivers/i2c/
both flavors of i2c_nrfx drivers are updated with the new names of
macros generated from dts
* boards/
all i2cX nodes in dts files for boards equipped with an nRF chip are
updated with the proper "compatible" property, according to the type
of TWI peripheral that is currently selected for the board by the
corresponding Kconfig choice option (I2C_x_NRF_TWI*)
Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
2019-09-26 19:13:17 +02:00
Renamed from dts/bindings/i2c/nordic,nrf-i2c.yaml (Browse further)
