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Commit 976ee49d authored by Saranya Chidura's avatar Saranya Chidura
Browse files

coresight:byte-cntr: fix the byte-counter of ETR 



When ETR byte-cntr is enabled, ETR triggers an interrupt at
ETRBYTECNT. It indicates atleast 'block_size' bytes of data
is captured in DDR. The Byte-cntr is a 8-byte counter, so
the CSR register ETRBYTECNT is set to 'block_size/8'.

Change-Id: I62871b4a62216f35365ee490f6b0946a039e182e
Signed-off-by: default avatarSaranya Chidura <schidura@codeaurora.org>
parent be5c1d18

drivers/hwtracing/coresight/coresight-byte-cntr.c

+5 −1
Original line number Diff line number Diff line
@@ -268,8 +268,12 @@ static int tmc_etr_byte_cntr_open(struct inode *in, struct file *fp) 
		return -EINVAL;

	}



	/* IRQ is a '8- byte' counter and to observe interrupt at

	 * 'block_size' bytes of data

	 */

	coresight_csr_set_byte_cntr(byte_cntr_data->csr,

				byte_cntr_data->block_size);

				(byte_cntr_data->block_size) / 8);



	fp->private_data = byte_cntr_data;

	nonseekable_open(in, fp);

	byte_cntr_data->enable = true;

drivers/hwtracing/coresight/coresight-tmc.c

+6 −1
Original line number Diff line number Diff line
@@ -487,8 +487,13 @@ static ssize_t block_size_store(struct device *dev, 
	if (!drvdata->byte_cntr)

		return -EINVAL;



	if (val && val < 16) {

		pr_err("Assign minimum block size of 16 bytes\n");

		return -EINVAL;

	}



	mutex_lock(&drvdata->byte_cntr->byte_cntr_lock);

	drvdata->byte_cntr->block_size = val * 8;

	drvdata->byte_cntr->block_size = val;

	mutex_unlock(&drvdata->byte_cntr->byte_cntr_lock);



	return size;