From: Markus Reichl <m.reichl@fivetechno.de>
To: Krzysztof Kozlowski <k.kozlowski@samsung.com>,
Kukjin Kim <kgene@kernel.org>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mmc@vger.kernel.org
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
Mark Brown <broonie@kernel.org>,
Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Subject: Re: [PATCH] ARM: dts: exynos: Fix invalid maximum voltage for buck9 supplying SD card
Date: Thu, 24 Mar 2016 15:10:29 +0100 [thread overview]
Message-ID: <56F3F555.5040704@fivetechno.de> (raw)
In-Reply-To: <1458807125-13580-1-git-send-email-k.kozlowski@samsung.com>
Hi Krzysztof,
with this patch on Odroid XU4 I get the following dmesg|grep vdd_2.8v_ldo:
[ 1.739943] vdd_2.8v_ldo: override max_uV, 3755000 -> 3750000
[ 1.740905] vdd_2.8v_ldo: 3000 <--> 3750 mV at 5000 mV
Regards,
--
Markus Reichl
Am 24.03.2016 um 09:12 schrieb Krzysztof Kozlowski:
> The buck9 regulator of S2MPS11 PMIC had incorrect maximum voltage -
> lower by 5 mV than specified by datasheet. This buck9 provides power to
> other regulators, including LDO13 and LDO19 which supply the MMC2 (SD
> card).
>
> When constraints were applied, the depending regulators were not
> providing enough power, leading to SD card detection errors:
> mmc1: card never left busy state
> mmc1: error -110 whilst initialising SD card
>
> Fixes: 86a2d2ac5e5d ("ARM: dts: Add dts file for Odroid XU3 board")
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
>
> ---
>
> The issue can be reproduced on next-20160324 with
> bae4fdc88d7f7dda1 (regulator: core: Ensure we are at least in bounds for our constraints).
> ---
> arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
> index 1bd507bfa750..82b2ba632cf6 100644
> --- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
> +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
> @@ -299,7 +299,7 @@
> buck9_reg: BUCK9 {
> regulator-name = "vdd_2.8v_ldo";
> regulator-min-microvolt = <3000000>;
> - regulator-max-microvolt = <3750000>;
> + regulator-max-microvolt = <3755000>;
> regulator-always-on;
> regulator-boot-on;
> };
>
next prev parent reply other threads:[~2016-03-24 14:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-24 8:12 [PATCH] ARM: dts: exynos: Fix invalid maximum voltage for buck9 supplying SD card Krzysztof Kozlowski
2016-03-24 9:33 ` Jaehoon Chung
2016-03-24 9:53 ` Mark Brown
2016-03-24 10:25 ` Krzysztof Kozlowski
2016-03-24 11:02 ` Mark Brown
2016-03-24 11:02 ` Mark Brown
2016-03-24 14:10 ` Markus Reichl [this message]
2016-03-25 5:45 ` Javier Martinez Canillas
2016-03-25 7:14 ` Markus Reichl
2016-03-28 0:08 ` Krzysztof Kozlowski
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