On Mon 09 Jul 02:16 PDT 2018, Bhushan Shah wrote:
> 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@xxxxxxx>
> Suggested-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
> Tested-by: Brian Masney <masneyb@xxxxxxxxxxxxx>
Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
Regards,
Bjorn
> ---
> 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
>
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