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From:   Longfang Liu <liulongfang@huawei.com>
To:     <herbert@gondor.apana.org.au>
CC:     <linux-crypto@vger.kernel.org>
Subject: [PATCH 1/5] crypto: hisilicon/sec2 - clear SEC debug regs
Date:   Fri, 26 Jun 2020 18:32:05 +0800
Message-ID: <1593167529-22463-2-git-send-email-liulongfang@huawei.com>
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From: Kai Ye <yekai13@huawei.com>

SEC debug registers aren't cleared even if its driver is removed,
so add a clearing operation in driver removing.

Signed-off-by: Kai Ye <yekai13@huawei.com>
Reviewed-by: Longfang Liu <liulongfang@huawei.com>
---
 drivers/crypto/hisilicon/sec2/sec_main.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/crypto/hisilicon/sec2/sec_main.c b/drivers/crypto/hisilicon/sec2/sec_main.c
index a4cb58b..c2567cc 100644
--- a/drivers/crypto/hisilicon/sec2/sec_main.c
+++ b/drivers/crypto/hisilicon/sec2/sec_main.c
@@ -346,10 +346,17 @@ static int sec_set_user_domain_and_cache(struct hisi_qm *qm)
 /* sec_debug_regs_clear() - clear the sec debug regs */
 static void sec_debug_regs_clear(struct hisi_qm *qm)
 {
+	int i;
+
 	/* clear current_qm */
 	writel(0x0, qm->io_base + QM_DFX_MB_CNT_VF);
 	writel(0x0, qm->io_base + QM_DFX_DB_CNT_VF);
 
+	/* clear sec dfx regs */
+	writel(0x1, qm->io_base + SEC_CTRL_CNT_CLR_CE);
+	for (i = 0; i < ARRAY_SIZE(sec_dfx_regs); i++)
+		readl(qm->io_base + sec_dfx_regs[i].offset);
+
 	/* clear rdclr_en */
 	writel(0x0, qm->io_base + SEC_CTRL_CNT_CLR_CE);
 
-- 
2.8.1