From: Peter Ujfalusi Date: Wed, 14 Oct 2015 11:43:00 +0000 (+0300) Subject: dmaengine: edma: Consolidate the comments for functions X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=11c157337a3fb0a8bed5272b3a43f2bf482032ee;p=linux-beck.git dmaengine: edma: Consolidate the comments for functions Remove or rewrite the comments for the internal functions. Signed-off-by: Peter Ujfalusi Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index d33ae0b43925..6bcbdceb3dc2 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -508,19 +508,7 @@ static void edma_setup_interrupt(struct edma_cc *ecc, unsigned lch, } /* - * paRAM management functions - */ - -/** - * edma_write_slot - write parameter RAM data for slot - * @ecc: pointer to edma_cc struct - * @slot: number of parameter RAM slot being modified - * @param: data to be written into parameter RAM slot - * - * Use this to assign all parameters of a transfer at once. This - * allows more efficient setup of transfers than issuing multiple - * calls to set up those parameters in small pieces, and provides - * complete control over all transfer options. + * paRAM slot management functions */ static void edma_write_slot(struct edma_cc *ecc, unsigned slot, const struct edmacc_param *param) @@ -531,15 +519,6 @@ static void edma_write_slot(struct edma_cc *ecc, unsigned slot, memcpy_toio(ecc->base + PARM_OFFSET(slot), param, PARM_SIZE); } -/** - * edma_read_slot - read parameter RAM data from slot - * @ecc: pointer to edma_cc struct - * @slot: number of parameter RAM slot being copied - * @param: where to store copy of parameter RAM data - * - * Use this to read data from a parameter RAM slot, perhaps to - * save them as a template for later reuse. - */ static void edma_read_slot(struct edma_cc *ecc, unsigned slot, struct edmacc_param *param) { @@ -590,15 +569,6 @@ static int edma_alloc_slot(struct edma_cc *ecc, int slot) return EDMA_CTLR_CHAN(ecc->id, slot); } -/** - * edma_free_slot - deallocate DMA parameter RAM - * @ecc: pointer to edma_cc struct - * @slot: parameter RAM slot returned from edma_alloc_slot() - * - * This deallocates the parameter RAM slot allocated by edma_alloc_slot(). - * Callers are responsible for ensuring the slot is inactive, and will - * not be activated. - */ static void edma_free_slot(struct edma_cc *ecc, unsigned slot) { slot = EDMA_CHAN_SLOT(slot); @@ -707,10 +677,9 @@ static int edma_start(struct edma_cc *ecc, unsigned channel) * @ecc: pointer to edma_cc struct * @channel: channel being deactivated * - * When @lch is a channel, any active transfer is paused and - * all pending hardware events are cleared. The current transfer - * may not be resumed, and the channel's Parameter RAM should be - * reinitialized before being reused. + * Any active transfer is paused and all pending hardware events are cleared. + * The current transfer may not be resumed, and the channel's Parameter RAM + * should be reinitialized before being reused. */ static void edma_stop(struct edma_cc *ecc, unsigned channel) { @@ -742,13 +711,9 @@ static void edma_stop(struct edma_cc *ecc, unsigned channel) } } -/** - * edma_pause - pause dma on a channel - * @ecc: pointer to edma_cc struct - * @channel: on which edma_start() has been called - * - * This temporarily disables EDMA hardware events on the specified channel, - * preventing them from triggering new transfers on its behalf +/* + * Temporarily disable EDMA hardware events on the specified channel, + * preventing them from triggering new transfers */ static void edma_pause(struct edma_cc *ecc, unsigned channel) { @@ -766,13 +731,7 @@ static void edma_pause(struct edma_cc *ecc, unsigned channel) } } -/** - * edma_resume - resumes dma on a paused channel - * @ecc: pointer to edma_cc struct - * @channel: on which edma_pause() has been called - * - * This re-enables EDMA hardware events on the specified channel. - */ +/* Re-enable EDMA hardware events on the specified channel. */ static void edma_resume(struct edma_cc *ecc, unsigned channel) { if (ecc->id != EDMA_CTLR(channel)) { @@ -808,19 +767,6 @@ static int edma_trigger_channel(struct edma_cc *ecc, unsigned channel) return 0; } -/****************************************************************************** - * - * It cleans ParamEntry qand bring back EDMA to initial state if media has - * been removed before EDMA has finished.It is usedful for removable media. - * Arguments: - * ch_no - channel no - * - * Return: zero on success, or corresponding error no on failure - * - * FIXME this should not be needed ... edma_stop() should suffice. - * - *****************************************************************************/ - static void edma_clean_channel(struct edma_cc *ecc, unsigned channel) { if (ecc->id != EDMA_CTLR(channel)) { @@ -975,14 +921,7 @@ static void edma_free_channel(struct edma_cc *ecc, unsigned channel) clear_bit(channel, ecc->edma_inuse); } -/* - * edma_assign_channel_eventq - move given channel to desired eventq - * Arguments: - * channel - channel number - * eventq_no - queue to move the channel - * - * Can be used to move a channel to a selected event queue. - */ +/* Move channel to a specific event queue */ static void edma_assign_channel_eventq(struct edma_cc *ecc, unsigned channel, enum dma_event_q eventq_no) { @@ -1005,6 +944,7 @@ static void edma_assign_channel_eventq(struct edma_cc *ecc, unsigned channel, edma_map_dmach_to_queue(ecc, channel, eventq_no); } +/* eDMA interrupt handler */ static irqreturn_t dma_irq_handler(int irq, void *data) { struct edma_cc *ecc = data; @@ -1056,11 +996,7 @@ static irqreturn_t dma_irq_handler(int irq, void *data) return IRQ_HANDLED; } -/****************************************************************************** - * - * DMA error interrupt handler - * - *****************************************************************************/ +/* eDMA error interrupt handler */ static irqreturn_t dma_ccerr_handler(int irq, void *data) { struct edma_cc *ecc = data;