Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5ce998cf authored by Michael Hennerich's avatar Michael Hennerich Committed by Bryan Wu
Browse files

Blackfin arch: Check for Anomaly 05000182 



IMDMA does not operate to full speed for 600MHz and higher devices

Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent 9cd9c616

arch/blackfin/kernel/bfin_dma_5xx.c

+11 −0
Original line number Diff line number Diff line
@@ -90,6 +90,17 @@ int request_dma(unsigned int channel, char *device_id) 
{



	pr_debug("request_dma() : BEGIN \n");



#if defined(CONFIG_BF561) && ANOMALY_05000182

	if (channel >= CH_IMEM_STREAM0_DEST && channel <= CH_IMEM_STREAM1_DEST) {

		if (get_cclk() > 500000000) {

			printk(KERN_WARNING

			       "Request IMDMA failed due to ANOMALY 05000182\n");

			return -EFAULT;

		}

	}

#endif



	mutex_lock(&(dma_ch[channel].dmalock));



	if ((dma_ch[channel].chan_status == DMA_CHANNEL_REQUESTED)