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From: Jerome Brunet <jbrunet@baylibre.com>
To: Kevin Hilman <khilman@baylibre.com>, Carlo Caione <carlo@caione.org>
Cc: Jerome Brunet <jbrunet@baylibre.com>,
	linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v3 4/9] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times
Date: Thu, 31 Aug 2017 15:52:21 +0200	[thread overview]
Message-ID: <20170831135226.19784-5-jbrunet@baylibre.com> (raw)
In-Reply-To: <20170831135226.19784-1-jbrunet@baylibre.com>

Changing the card voltage on the nanopi-k2 is not instantaneous,
especially when switching from 3.3v to 1.8v.

It take at least 3ms for the regulator to go from 3.3v to 1.8v. Add
margin to that to make sure we don't upset the sdcard during the voltage
switch

Fixes: 9bc7ffb08daf ("arm64: dts: amlogic: Add NanoPi K2")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
index 60d5f2da6916..acb6797756e5 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
@@ -107,6 +107,9 @@
 
 		states = <3300000 0>,
 		         <1800000 1>;
+
+		regulator-settling-time-up-us = <100>;
+		regulator-settling-time-down-us = <5000>;
 	};
 
 	wifi_32k: wifi-32k {
-- 
2.9.5

WARNING: multiple messages have this Message-ID (diff)
From: jbrunet@baylibre.com (Jerome Brunet)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 4/9] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times
Date: Thu, 31 Aug 2017 15:52:21 +0200	[thread overview]
Message-ID: <20170831135226.19784-5-jbrunet@baylibre.com> (raw)
In-Reply-To: <20170831135226.19784-1-jbrunet@baylibre.com>

Changing the card voltage on the nanopi-k2 is not instantaneous,
especially when switching from 3.3v to 1.8v.

It take at least 3ms for the regulator to go from 3.3v to 1.8v. Add
margin to that to make sure we don't upset the sdcard during the voltage
switch

Fixes: 9bc7ffb08daf ("arm64: dts: amlogic: Add NanoPi K2")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
index 60d5f2da6916..acb6797756e5 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
@@ -107,6 +107,9 @@
 
 		states = <3300000 0>,
 		         <1800000 1>;
+
+		regulator-settling-time-up-us = <100>;
+		regulator-settling-time-down-us = <5000>;
 	};
 
 	wifi_32k: wifi-32k {
-- 
2.9.5

WARNING: multiple messages have this Message-ID (diff)
From: jbrunet@baylibre.com (Jerome Brunet)
To: linus-amlogic@lists.infradead.org
Subject: [PATCH v3 4/9] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times
Date: Thu, 31 Aug 2017 15:52:21 +0200	[thread overview]
Message-ID: <20170831135226.19784-5-jbrunet@baylibre.com> (raw)
In-Reply-To: <20170831135226.19784-1-jbrunet@baylibre.com>

Changing the card voltage on the nanopi-k2 is not instantaneous,
especially when switching from 3.3v to 1.8v.

It take at least 3ms for the regulator to go from 3.3v to 1.8v. Add
margin to that to make sure we don't upset the sdcard during the voltage
switch

Fixes: 9bc7ffb08daf ("arm64: dts: amlogic: Add NanoPi K2")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
index 60d5f2da6916..acb6797756e5 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-nanopi-k2.dts
@@ -107,6 +107,9 @@
 
 		states = <3300000 0>,
 		         <1800000 1>;
+
+		regulator-settling-time-up-us = <100>;
+		regulator-settling-time-down-us = <5000>;
 	};
 
 	wifi_32k: wifi-32k {
-- 
2.9.5

  parent reply	other threads:[~2017-08-31 13:52 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-31 13:52 [PATCH v3 0/9] ARM64: dts: meson: update around mmc Jerome Brunet
2017-08-31 13:52 ` Jerome Brunet
2017-08-31 13:52 ` Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 1/9] ARM64: dts: meson-gx: Use correct mmc clock source 0 Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 2/9] ARM64: dts: meson: remove cap-sd-highspeed from emmc nodes Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 3/9] ARM64: dts: meson: add mmc clk gate pins Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52 ` Jerome Brunet [this message]
2017-08-31 13:52   ` [PATCH v3 4/9] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 5/9] ARM64: dts: meson-gxl: libretech-cc: " Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 6/9] ARM64: dts: meson-gxl: libretech-cc: enable high speed modes Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 7/9] ARM64: dts: meson-gxbb: p20x: enable sdcard UHS modes Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 8/9] ARM64: dts: meson-gxbb: nanopi-k2: " Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 9/9] ARM64: dts: meson-gxbb: nanopi-k2: enable sdr104 mode Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-08-31 13:52   ` Jerome Brunet
2017-09-05 19:18 ` [PATCH v3 0/9] ARM64: dts: meson: update around mmc Kevin Hilman
2017-09-05 19:18   ` Kevin Hilman
2017-09-05 19:18   ` Kevin Hilman
2017-09-05 19:18   ` Kevin Hilman

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