void imx233_timrot_setup(unsigned timer_nr, bool reload, unsigned count, unsigned src, unsigned prescale, bool polarity, imx233_timer_fn_t fn) { int oldstatus = disable_interrupt_save(IRQ_FIQ_STATUS); /* only enable interrupt if function is set */ bool irq = fn != NULL; timer_fns[timer_nr] = fn; /* make sure we start from stop state */ HW_TIMROT_TIMCTRLn(timer_nr) = BF_OR2(TIMROT_TIMCTRLn, SELECT(BV_TIMROT_TIMCTRLn_SELECT__NEVER_TICK), UPDATE(1)); /* write count and take effect immediately with UPDATE * manual says count-1 for reload timers */ HW_TIMROT_TIMCOUNTn(timer_nr) = reload ? count - 1 : count; /* start timer */ HW_TIMROT_TIMCTRLn(timer_nr) = BF_OR6(TIMROT_TIMCTRLn, SELECT(src), PRESCALE(prescale), POLARITY(polarity), RELOAD(reload), IRQ(irq), IRQ_EN(irq)); imx233_icoll_enable_interrupt(INT_SRC_TIMER(timer_nr), irq); restore_interrupt(oldstatus); }
#if defined(BOARD_UI_LED_PWM_DRIVE_ACTIVE_LOW) # define UI_POLARITY(c) ACTIVE_LOW(c) # define UI_DRIVE_TYPE(p) ((p)|GPIO_OPENDRAIN) #else # define UI_POLARITY(c) ACTIVE_HIGH((c)) # define UI_DRIVE_TYPE(p) (p) #endif __EXPORT const struct timer_io_channels_t led_pwm_channels[MAX_TIMER_LED_CHANNELS] = { { .gpio_out = DRIVE_TYPE(LED_TIM3_CH4OUT), .gpio_in = 0, .timer_index = 0, .timer_channel = 4, .masks = POLARITY(4), }, { .gpio_out = DRIVE_TYPE(LED_TIM3_CH1OUT), .gpio_in = 0, .timer_index = 0, .timer_channel = 1, .masks = POLARITY(1), }, { .gpio_out = DRIVE_TYPE(LED_TIM3_CH2OUT), .gpio_in = 0, .timer_index = 0, .timer_channel = 2, .masks = POLARITY(2), },