My own code should be based on LPCOpen's common chip-specific drivers.
Therefore, I first imported the LPCOpen drivers "lpc_chip_175x_6x" into my MCUXpresso workspace. For this, I used the import wizard, selected the LPCOpen project archive "lpcopen_2_10_lpcxpresso_nxp_lpcxpresso_1769.zip" which came included with the IDE installation.
Skimming through the *.c and *.h LPCOpen driver files (in the imported "lpc_chip_175x_6x" project), the only reference to PWM (except for the motor controller pwm) which I could find was LPC_PWM1_BASE in chip_lpc177x_8x.h.
Adhering to the naming convention of the LPCOpen driver files, I expected to find a file, e.g., named pwm_177x_8x.[ch] or at least a register structure for the PWM registers.
Any ideas why I'm missing these and where I could find them?
For now, I'm going to resort to the definitions provided in timer_17xx_40xx.[ch] as PWM is based on standard timer blocks and the register layout is very similar.