linux-kernel - [RFC 1/4] mmc: cqhci: Move CQHCI_ENABLE before setting TDLBA/TDLBAU

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Date:   Wed, 30 Aug 2017 18:34:08 +0530
From:   Ritesh Harjani <riteshh@...eaurora.org>
To:     ulf.hansson@...aro.org, adrian.hunter@...el.com
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        stummala@...eaurora.org, asutoshd@...eaurora.org,
        Ritesh Harjani <riteshh@...eaurora.org>
Subject: [RFC 1/4] mmc: cqhci: Move CQHCI_ENABLE before setting TDLBA/TDLBAU

Without this patch the CQHCI registers are getting reset
again.

Signed-off-by: Ritesh Harjani <riteshh@...eaurora.org>
---
 drivers/mmc/host/cqhci.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/cqhci.c b/drivers/mmc/host/cqhci.c
index 8650a13..2a7351c 100644
--- a/drivers/mmc/host/cqhci.c
+++ b/drivers/mmc/host/cqhci.c
@@ -262,6 +262,9 @@ static void __cqhci_enable(struct cqhci_host *cq_host)
 
 	cqhci_writel(cq_host, cqcfg, CQHCI_CFG);
 
+	cqcfg |= CQHCI_ENABLE;
+	cqhci_writel(cq_host, cqcfg, CQHCI_CFG);
+
 	cqhci_writel(cq_host, lower_32_bits(cq_host->desc_dma_base),
 		     CQHCI_TDLBA);
 	cqhci_writel(cq_host, upper_32_bits(cq_host->desc_dma_base),
@@ -271,10 +274,6 @@ static void __cqhci_enable(struct cqhci_host *cq_host)
 
 	cqhci_set_irqs(cq_host, 0);
 
-	cqcfg |= CQHCI_ENABLE;
-
-	cqhci_writel(cq_host, cqcfg, CQHCI_CFG);
-
 	mmc->cqe_on = true;
 
 	if (cq_host->ops->enable)
-- 
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Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.