From: Shaik Sajida Bhanu <sbhanu@codeaurora.org>
To: adrian.hunter@intel.com, ulf.hansson@linaro.org, robh+dt@kernel.org
Cc: asutoshd@codeaurora.org, stummala@codeaurora.org,
pragalla@codeaurora.org, nitirawa@codeaurora.org,
rampraka@codeaurora.org, sayalil@codeaurora.org,
sartgarg@codeaurora.org, cang@codeaurora.org,
linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
agross@kernel.org, bjorn.andersson@linaro.org,
Shaik Sajida Bhanu <sbhanu@codeaurora.org>
Subject: [PATCH V1] arm64: dts: qcom: sc7180: Use maximum drive strength values for eMMC
Date: Mon, 16 Aug 2021 22:20:50 +0530 [thread overview]
Message-ID: <1629132650-26277-1-git-send-email-sbhanu@codeaurora.org> (raw)
The current drive strength values are not sufficient on non discrete
boards and this leads to CRC errors during switching to HS400 enhanced
strobe mode.
Hardware simulation results on non discrete boards shows up that use the
maximum drive strength values for data and command lines could helps
in avoiding these CRC errors.
So, update data and command line drive strength values to maximum.
Signed-off-by: Shaik Sajida Bhanu <sbhanu@codeaurora.org>
---
arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
index 0f2b3c0..79d7aa6 100644
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
@@ -1524,13 +1524,13 @@ ap_spi_fp: &spi10 {
pinconf-cmd {
pins = "sdc1_cmd";
bias-pull-up;
- drive-strength = <10>;
+ drive-strength = <16>;
};
pinconf-data {
pins = "sdc1_data";
bias-pull-up;
- drive-strength = <10>;
+ drive-strength = <16>;
};
pinconf-rclk {
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
next reply other threads:[~2021-08-16 16:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-16 16:50 Shaik Sajida Bhanu [this message]
2021-08-17 13:58 ` [PATCH V1] arm64: dts: qcom: sc7180: Use maximum drive strength values for eMMC Doug Anderson
2021-08-19 13:44 ` Doug Anderson
2021-09-23 20:19 ` Doug Anderson
2021-09-23 20:30 ` (subset) " Bjorn Andersson
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