linux-kernel - [PATCH 5.4 48/49] misc: rtsx: do not setting OC_POWER_DOWN reg in rtsx_pci_init

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Date:   Sat, 31 Oct 2020 12:35:44 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ricky Wu <ricky_wu@...ltek.com>,
        Chris Clayton <chris2553@...glemail.com>
Subject: [PATCH 5.4 48/49] misc: rtsx: do not setting OC_POWER_DOWN reg in rtsx_pci_init_ocp()

From: Ricky Wu <ricky_wu@...ltek.com>

commit 551b6729578a8981c46af964c10bf7d5d9ddca83 upstream.

this power saving action in rtsx_pci_init_ocp() cause INTEL-NUC6 platform
missing card reader

Signed-off-by: Ricky Wu <ricky_wu@...ltek.com>
Link: https://lore.kernel.org/r/20200824030006.30033-1-ricky_wu@realtek.com
Cc: Chris Clayton <chris2553@...glemail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/misc/cardreader/rtsx_pcr.c |    4 ----
 1 file changed, 4 deletions(-)

--- a/drivers/misc/cardreader/rtsx_pcr.c
+++ b/drivers/misc/cardreader/rtsx_pcr.c
@@ -1189,10 +1189,6 @@ void rtsx_pci_init_ocp(struct rtsx_pcr *
 			rtsx_pci_write_register(pcr, REG_OCPGLITCH,
 				SD_OCP_GLITCH_MASK, pcr->hw_param.ocp_glitch);
 			rtsx_pci_enable_ocp(pcr);
-		} else {
-			/* OC power down */
-			rtsx_pci_write_register(pcr, FPDCTL, OC_POWER_DOWN,
-				OC_POWER_DOWN);
 		}
 	}
 }