It is possible that a context switch occurs after stm32_i2c_isr() call
but before elapsed time is saved in stm32_i2c_sem_waitdone(). It is then
possible that the handling code was executed only once with "elapsed
time" equal 0. When scheduler resumes this thread it is quite possible
that now "elapsed time" will be well above timeout threshold. In that
case the function returns and reports a timeout, even though the
handling code was not executed "recently".

Fix this by inverting the order of operations in the loop - save elapsed
time before handling I2C. This way a context switch anywhere in the loop
will not cause an erroneous "timeout" error.

fix as5048b by adding missing frequency parameter

Approved-by: Gregory Nutt

increase number of supported PWM channels from 4 to 6

Approved-by: Gregory Nutt

actually write modified value to register

Approved-by: Gregory Nutt

use correct macro for irqid (fortunately both point to LPC43_IRQ_EXTINT+18)

Approved-by: Gregory Nutt

fix logic in preprocessor checks and correct arguments to lpc43_pin_config initialization

Approved-by: Gregory Nutt

fix logic error in lpc43_adc

Approved-by: Gregory Nutt

Fix errors in LPC43 SCT and SGPIO headers.

Approved-by: Gregory Nutt

rename LPC43_GPDMA_GLOBAL_CONFIG (already slipped previous commit C file); fix GPDMA_CONTROL_SBSIZE_*, improve usability of GPDMA_CONTROL_{S,D} macros

Approved-by: Gregory Nutt

add missing PINCONF_INBUFFER in several places of lpc4310203050_pinconfig.h

Approved-by: Gregory Nutt

change Kconfig type of ADC0_MASK from hex to int; add ADC driver options to lpc43xx

Approved-by: Gregory Nutt

add LPC4337FET256

Approved-by: Gregory Nutt

Note: This has already been tested. However, I have to significantly clean up the actual drivers (C files) before committing them, too.

rename LPC43_GPDMA_GLOBAL_CONFIG (already slipped previous commit C file); fix GPDMA_CONTROL_SBSIZE_*, improve usability of GPDMA_CONTROL_{S,D} macros

Ensure interrups are back on BEFORE running code dependant on clock_systimer

Approved-by: Gregory Nutt

Kinetis:Fixed GPIO _PIN_OUTPUT_LOWDRIVE swapped with _PIN_OUTPUT_OPENDRAIN

Approved-by: Gregory Nutt