linux-kernel - [PATCH AUTOSEL 4.18 71/88] ARM: dts: qcom: msm8974-hammerhead: increase load on l20 for sdhci

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Date:   Fri, 7 Sep 2018 00:36:42 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Bhushan Shah <bshah@....org>, Brian Masney <masneyb@...tation.org>,
        Andy Gross <andy.gross@...aro.org>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 71/88] ARM: dts: qcom: msm8974-hammerhead:
 increase load on l20 for sdhci

From: Bhushan Shah <bshah@....org>

[ Upstream commit 03864e57770a9541e7ff3990bacf2d9a2fffcd5d ]

The kernel would not boot on the hammerhead hardware due to the
following error:

mmc0: Timeout waiting for hardware interrupt.
mmc0: sdhci: ============ SDHCI REGISTER DUMP ===========
mmc0: sdhci: Sys addr:  0x00000200 | Version:  0x00003802
mmc0: sdhci: Blk size:  0x00000200 | Blk cnt:  0x00000200
mmc0: sdhci: Argument:  0x00000000 | Trn mode: 0x00000023
mmc0: sdhci: Present:   0x03e80000 | Host ctl: 0x00000034
mmc0: sdhci: Power:     0x00000001 | Blk gap:  0x00000000
mmc0: sdhci: Wake-up:   0x00000000 | Clock:    0x00000007
mmc0: sdhci: Timeout:   0x0000000e | Int stat: 0x00000000
mmc0: sdhci: Int enab:  0x02ff900b | Sig enab: 0x02ff100b
mmc0: sdhci: AC12 err:  0x00000000 | Slot int: 0x00000000
mmc0: sdhci: Caps:      0x642dc8b2 | Caps_1:   0x00008007
mmc0: sdhci: Cmd:       0x00000c1b | Max curr: 0x00000000
mmc0: sdhci: Resp[0]:   0x00000c00 | Resp[1]:  0x00000000
mmc0: sdhci: Resp[2]:   0x00000000 | Resp[3]:  0x00000000
mmc0: sdhci: Host ctl2: 0x00000008
mmc0: sdhci: ADMA Err:  0x00000000 | ADMA Ptr: 0x70040220
mmc0: sdhci: ============================================
mmc0: Card stuck in wrong state! mmcblk0 card_busy_detect status: 0xe00
mmc0: cache flush error -110
mmc0: Reset 0x1 never completed.

This patch increases the load on l20 to 0.2 amps for the sdhci
and allows the device to boot normally.

Signed-off-by: Bhushan Shah <bshah@....org>
Signed-off-by: Brian Masney <masneyb@...tation.org>
Suggested-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Tested-by: Brian Masney <masneyb@...tation.org>
Signed-off-by: Andy Gross <andy.gross@...aro.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
index 4dc0b347b1ee..c2dc9d09484a 100644
--- a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
+++ b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
@@ -189,6 +189,8 @@
 						regulator-max-microvolt = <2950000>;
 
 						regulator-boot-on;
+						regulator-system-load = <200000>;
+						regulator-allow-set-load;
 					};
 
 					l21 {
-- 
2.17.1