linux-kernel - [PATCH RFC 08/12] mmc: mmci: move ST specific register extensions access under condition.

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: <1398116922-31556-1-git-send-email-srinivas.kandagatla@linaro.org>
Date:	Mon, 21 Apr 2014 22:48:42 +0100
From:	srinivas.kandagatla@...aro.org
To:	linux-mmc@...r.kernel.org
Cc:	Russell King <linux@....linux.org.uk>,
	Chris Ball <chris@...ntf.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	linux-kernel@...r.kernel.org, agross@...cinc.com,
	linux-arm-msm@...r.kernel.org,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH RFC 08/12] mmc: mmci: move ST specific register extensions access under condition.

From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

This patch moves some of the ST specific register extensions access under
condition, so that other SOCs like Qualcomm or ARM would not a side effect of
writing to those reserved/different purpose bits.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/mmc/host/mmci.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 2dc7581..179abfb 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -270,7 +270,8 @@ static void mmci_write_pwrreg(struct mmci_host *host, u32 pwr)
 static void mmci_write_datactrlreg(struct mmci_host *host, u32 datactrl)
 {
 	/* Keep ST Micro busy mode if enabled */
-	datactrl |= host->datactrl_reg & MCI_ST_DPSM_BUSYMODE;
+	if (host->hw_designer == AMBA_VENDOR_ST)
+		datactrl |= host->datactrl_reg & MCI_ST_DPSM_BUSYMODE;
 
 	if (host->datactrl_reg != datactrl) {
 		host->datactrl_reg = datactrl;
@@ -816,7 +817,8 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
 			mmci_write_clkreg(host, clk);
 		}
 
-	if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50)
+	if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 &&
+	    host->hw_designer == AMBA_VENDOR_ST)
 		datactrl |= MCI_ST_DPSM_DDRMODE;
 
 	/*
-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/