linux-kernel - [PATCH 1/2] mmc: sdhci-of-arasan: Use Mask writes for Tap delays

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1605507327-106818-2-git-send-email-manish.narani@xilinx.com>
Date:   Mon, 16 Nov 2020 11:45:26 +0530
From:   Manish Narani <manish.narani@...inx.com>
To:     <michal.simek@...inx.com>, <adrian.hunter@...el.com>,
        <ulf.hansson@...aro.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <git@...inx.com>, Manish Narani <manish.narani@...inx.com>,
        Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@...inx.com>
Subject: [PATCH 1/2] mmc: sdhci-of-arasan: Use Mask writes for Tap delays

Mask the ITAP and OTAP delay bits before updating with the new
tap value for Versal platform.

Fixes: 1a470721c8f5 ("sdhci: arasan: Add support for Versal Tap Delays")
Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@...inx.com>
Signed-off-by: Manish Narani <manish.narani@...inx.com>
---
 drivers/mmc/host/sdhci-of-arasan.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index 100621e55427..3ec5ecad637c 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -30,7 +30,10 @@
 #define SDHCI_ARASAN_VENDOR_REGISTER	0x78
 
 #define SDHCI_ARASAN_ITAPDLY_REGISTER	0xF0F8
+#define SDHCI_ARASAN_ITAPDLY_SEL_MASK	0xFF
+
 #define SDHCI_ARASAN_OTAPDLY_REGISTER	0xF0FC
+#define SDHCI_ARASAN_OTAPDLY_SEL_MASK	0x3F
 
 #define SDHCI_ARASAN_CQE_BASE_ADDR	0x200
 #define VENDOR_ENHANCED_STROBE		BIT(0)
@@ -755,6 +758,7 @@ static int sdhci_versal_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
 		regval = sdhci_readl(host, SDHCI_ARASAN_OTAPDLY_REGISTER);
 		regval |= SDHCI_OTAPDLY_ENABLE;
 		sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
+		regval &= ~SDHCI_ARASAN_OTAPDLY_SEL_MASK;
 		regval |= tap_delay;
 		sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
 	}
@@ -822,6 +826,7 @@ static int sdhci_versal_sampleclk_set_phase(struct clk_hw *hw, int degrees)
 		sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
 		regval |= SDHCI_ITAPDLY_ENABLE;
 		sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+		regval &= ~SDHCI_ARASAN_ITAPDLY_SEL_MASK;
 		regval |= tap_delay;
 		sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
 		regval &= ~SDHCI_ITAPDLY_CHGWIN;
-- 
2.17.1