15 /* DIER register DMA enable bits */
28 	struct stm32_timers_dma *dma = p;  in stm32_timers_dma_done()  local
32 	status = dmaengine_tx_status(dma->chan, dma->chan->cookie, &state);  in stm32_timers_dma_done()
34 		complete(&dma->completion);  in stm32_timers_dma_done()
38  * stm32_timers_dma_burst_read - Read from timers registers using DMA.
40  * Read from STM32 timers registers using DMA on a single event.
42  * @buf: DMA'able destination buffer
44  * @reg: registers start offset for DMA to read from (like CCRx for capture)
45  * @num_reg: number of registers to read upon each DMA request, starting @reg.
57 	struct stm32_timers_dma *dma = &ddata->dma;  in stm32_timers_dma_burst_read()  local
75 	if (!dma->chans[id])  in stm32_timers_dma_burst_read()
77 	mutex_lock(&dma->lock);  in stm32_timers_dma_burst_read()
79 	/* Select DMA channel in use */  in stm32_timers_dma_burst_read()
80 	dma->chan = dma->chans[id];  in stm32_timers_dma_burst_read()
87 	/* Prepare DMA read from timer registers, using DMA burst mode */  in stm32_timers_dma_burst_read()
89 	config.src_addr = (dma_addr_t)dma->phys_base + TIM_DMAR;  in stm32_timers_dma_burst_read()
91 	ret = dmaengine_slave_config(dma->chan, &config);  in stm32_timers_dma_burst_read()
95 	desc = dmaengine_prep_slave_single(dma->chan, dma_buf, len,  in stm32_timers_dma_burst_read()
103 	desc->callback_param = dma;  in stm32_timers_dma_burst_read()
109 	reinit_completion(&dma->completion);  in stm32_timers_dma_burst_read()
110 	dma_async_issue_pending(dma->chan);  in stm32_timers_dma_burst_read()
112 	/* Setup and enable timer DMA burst mode */  in stm32_timers_dma_burst_read()
119 	/* Clear pending flags before enabling DMA request */  in stm32_timers_dma_burst_read()
129 	err = wait_for_completion_interruptible_timeout(&dma->completion,  in stm32_timers_dma_burst_read()
141 	dmaengine_terminate_all(dma->chan);  in stm32_timers_dma_burst_read()
145 	dma->chan = NULL;  in stm32_timers_dma_burst_read()
146 	mutex_unlock(&dma->lock);  in stm32_timers_dma_burst_read()
177 	init_completion(&ddata->dma.completion);  in stm32_timers_dma_probe()
178 	mutex_init(&ddata->dma.lock);  in stm32_timers_dma_probe()
180 	/* Optional DMA support: get valid DMA channel(s) or NULL */  in stm32_timers_dma_probe()
183 		ddata->dma.chans[i] = dma_request_chan(dev, name);  in stm32_timers_dma_probe()
185 	ddata->dma.chans[STM32_TIMERS_DMA_UP] = dma_request_chan(dev, "up");  in stm32_timers_dma_probe()
186 	ddata->dma.chans[STM32_TIMERS_DMA_TRIG] = dma_request_chan(dev, "trig");  in stm32_timers_dma_probe()
187 	ddata->dma.chans[STM32_TIMERS_DMA_COM] = dma_request_chan(dev, "com");  in stm32_timers_dma_probe()
190 		if (IS_ERR(ddata->dma.chans[i])) {  in stm32_timers_dma_probe()
192 			if (PTR_ERR(ddata->dma.chans[i]) != -ENODEV && !ret)  in stm32_timers_dma_probe()
193 				ret = PTR_ERR(ddata->dma.chans[i]);  in stm32_timers_dma_probe()
195 			ddata->dma.chans[i] = NULL;  in stm32_timers_dma_probe()
208 		if (ddata->dma.chans[i])  in stm32_timers_dma_remove()
209 			dma_release_channel(ddata->dma.chans[i]);  in stm32_timers_dma_remove()
229 	/* Timer physical addr for DMA */  in stm32_timers_probe()
230 	ddata->dma.phys_base = res->start;  in stm32_timers_probe()
264 	 * DMA are released, to avoid race on DMA.  in stm32_timers_remove()