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Commit d674645f authored by Mao Jinlong's avatar Mao Jinlong Committed by Gerrit - the friendly Code Review server
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coresight: etm3x: Check fuse status after clearing power down bit 



Move check of the fuse behind clearing power down bit action as
ETMCR bit 0 must be cleared before checking any ETM status.

Change-Id: I581b827eb43404413a2dca5299ea42d4233d99b5
Signed-off-by: default avatarMao Jinlong <jinlmao@codeaurora.org>
parent 6618051a

drivers/hwtracing/coresight/coresight-etm3x.c

+5 −4
Original line number Diff line number Diff line
@@ -712,10 +712,6 @@ static void etm_init_arch_data(void *info) 


	CS_UNLOCK(drvdata->base);



	/* check the state of the fuse */

	if (!coresight_authstatus_enabled(drvdata->base))

		goto out;



	/* First dummy read */

	(void)etm_readl(drvdata, ETMPDSR);

	/* Provide power to ETM: ETMPDCR[3] == 1 */
@@ -725,6 +721,11 @@ static void etm_init_arch_data(void *info) 
	 * certain registers might be ignored.

	 */

	etm_clr_pwrdwn(drvdata);



	/* check the state of the fuse */

	if (!coresight_authstatus_enabled(drvdata->base))

		goto out;



	/*

	 * Set prog bit. It will be set from reset but this is included to

	 * ensure it is set