Refactors all of the serial drivers to use a shared driver class
initialization priority configuration, CONFIG_SERIAL_INIT_PRIORITY, to
allow configuring serial drivers separately from other devices. This is
similar to other driver classes like I2C and SPI.
The default is set to CONFIG_KERNEL_INIT_PRIORITY_DEVICE to preserve the
existing default initialization priority for most drivers. The one
exception is uart_lpc11u6x.c which previously used
CONFIG_KERNEL_INIT_PRIORITY_OBJECTS.
This change was motivated by an issue on the frdm_k64f board where the
serial driver was incorrectly initialized before the clock control
driver.
Signed-off-by: Maureen Helm <maureen.helm@intel.com>
Add support for `CONFIG_UART_ASYNC_API` to the uart_rtt driver.
As RTT provides no mechanism for knowing when new data has arrived,
the reception commands all return errors.
This fixes hard faults when asynchronous calls are made on the uart_rtt
driver, in addition to providing a small level of functionality.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Instantiate RTT UART instances from devicetree nodes instead of from
Kconfig symbols. While RTT is implemented using software, not hardware,
it is emulating a hardware device, and thus should be configured through
devicetree. This allows the simulated UART device to be selected via
devicetree aliases and chosen nodes.
The following devicetree snippet will instantiate RTT channels 0 and 2
as UART devices.
```
/ {
rtt0: rtt_terminal {
compatible = "segger,rtt-uart";
label = "rtt_terminal";
status = "okay";
};
rtt2: rtt_secondary {
compatible = "segger,rtt-uart";
label = "rtt_app_specific";
status = "okay";
};
};
```
Fixes the RTT portion of #10621.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
Now that device_api attribute is unmodified at runtime, as well as all
the other attributes, it is possible to switch all device driver
instance to be constant.
A coccinelle rule is used for this:
@r_const_dev_1
disable optional_qualifier
@
@@
-struct device *
+const struct device *
@r_const_dev_2
disable optional_qualifier
@
@@
-struct device * const
+const struct device *
Fixes#27399
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Add support for virtual UART device that uses Segger RTT channels
for data transfers. Due to the RTT principle, this driver supports
only polling API.
Signed-off-by: Pavel Kral <pavel.kral@omsquare.com>
