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 1/6] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times
Date: Fri, 4 Aug 2017 20:08:11 +0200 [thread overview]
Message-ID: <20170804180816.18737-2-jbrunet@baylibre.com> (raw)
In-Reply-To: <20170804180816.18737-1-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 fa462831ccaf..6b7495dc6014 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 {
--
2.9.4
WARNING: multiple messages have this Message-ID (diff)
From: jbrunet@baylibre.com (Jerome Brunet)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/6] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times
Date: Fri, 4 Aug 2017 20:08:11 +0200 [thread overview]
Message-ID: <20170804180816.18737-2-jbrunet@baylibre.com> (raw)
In-Reply-To: <20170804180816.18737-1-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 fa462831ccaf..6b7495dc6014 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 {
--
2.9.4
WARNING: multiple messages have this Message-ID (diff)
From: jbrunet@baylibre.com (Jerome Brunet)
To: linus-amlogic@lists.infradead.org
Subject: [PATCH 1/6] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times
Date: Fri, 4 Aug 2017 20:08:11 +0200 [thread overview]
Message-ID: <20170804180816.18737-2-jbrunet@baylibre.com> (raw)
In-Reply-To: <20170804180816.18737-1-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 fa462831ccaf..6b7495dc6014 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 {
--
2.9.4
next prev parent reply other threads:[~2017-08-04 18:08 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-04 18:08 [PATCH 0/6] ARM64: dts: meson: update around mmc Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet [this message]
2017-08-04 18:08 ` [PATCH 1/6] ARM64: dts: meson-gxbb: nanopi-k2: add card regulator settle times Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` [PATCH 2/6] ARM64: dts: meson-gxl: libretech-cc: " Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` [PATCH 3/6] ARM64: dts: meson-gxbb: p20x: enable sdcard UHS modes Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` [PATCH 4/6] ARM64: dts: meson-gxbb: nanopi-k2: " Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-07 21:45 ` Kevin Hilman
2017-08-07 21:45 ` Kevin Hilman
2017-08-07 21:45 ` Kevin Hilman
2017-08-04 18:08 ` [PATCH 5/6] ARM64: dts: meson: add mmc clk gate pins Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` [PATCH 6/6] ARM64: dts: meson: remove cap-sd-highspeed from emmc nodes Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
2017-08-04 18:08 ` Jerome Brunet
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