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serial: introduce CONFIG_UART_USE_RUNTIME_CONFIGURE

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This kconfig option enables runtime configuration of UART
controllers. This allows application to call uart_configure()
to configure the UART controllers and calling uart_config_get()
to retrieve configuration. If this is disabled, UART controllers
rely on UART driver's initialization function to properly
configure the controller. The main use of this option is mainly
code size reduction.

Fixes #16231

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2021-05-26 12:33:37 -07:00 • committed by Carles Cufí
commit 4e1692f85a
15 changed files with 77 additions and 1 deletions
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4
drivers/serial/uart_stm32.c
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@ -320,6 +320,7 @@ static inline enum uart_config_flow_control uart_stm32_ll2cfg_hwctrl(uint32_t fc
return UART_CFG_FLOW_CTRL_NONE;
}
#ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
static int uart_stm32_configure(const struct device *dev,
const struct uart_config *cfg)
{
@ -425,6 +426,7 @@ static int uart_stm32_config_get(const struct device *dev,
uart_stm32_get_hwctrl(dev));
return 0;
}
#endif /* CONFIG_UART_USE_RUNTIME_CONFIGURE */
static int uart_stm32_poll_in(const struct device *dev, unsigned char *c)
{
@ -1290,8 +1292,10 @@ static const struct uart_driver_api uart_stm32_driver_api = {
.poll_in = uart_stm32_poll_in,
.poll_out = uart_stm32_poll_out,
.err_check = uart_stm32_err_check,
#ifdef CONFIG_UART_USE_RUNTIME_CONFIGURE
.configure = uart_stm32_configure,
.config_get = uart_stm32_config_get,
#endif /* CONFIG_UART_USE_RUNTIME_CONFIGURE */
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.fifo_fill = uart_stm32_fifo_fill,
.fifo_read = uart_stm32_fifo_read,