From: jbrunet@baylibre.com (Jerome Brunet)
To: linus-amlogic@lists.infradead.org
Subject: [PATCH v3 5/9] ARM64: dts: meson-gxl: libretech-cc: add card regulator settle times
Date: Thu, 31 Aug 2017 15:52:22 +0200 [thread overview]
Message-ID: <20170831135226.19784-6-jbrunet@baylibre.com> (raw)
In-Reply-To: <20170831135226.19784-1-jbrunet@baylibre.com>
Changing the card voltage on the cc is not instantaneous, especially
when switching from 3.3v to 1.8v.
It take at least 30ms 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: 61ff2af9b278 ("ARM64: dts: fixup libretech cc definition")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
index a014c052241e..7d252168c2fa 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
@@ -91,6 +91,9 @@
states = <3300000 0>,
<1800000 1>;
+
+ regulator-settling-time-up-us = <200>;
+ regulator-settling-time-down-us = <50000>;
};
vddio_boot: regulator-vddio_boot {
--
2.9.5
next prev parent reply other threads:[~2017-08-31 13:52 UTC|newest]
Thread overview: 11+ 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 ` [PATCH v3 1/9] ARM64: dts: meson-gx: Use correct mmc clock source 0 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 ` [PATCH v3 3/9] ARM64: dts: meson: add mmc clk gate pins Jerome Brunet
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 [this message]
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 ` [PATCH v3 7/9] ARM64: dts: meson-gxbb: p20x: enable sdcard UHS modes Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 8/9] ARM64: dts: meson-gxbb: nanopi-k2: " Jerome Brunet
2017-08-31 13:52 ` [PATCH v3 9/9] ARM64: dts: meson-gxbb: nanopi-k2: enable sdr104 mode Jerome Brunet
2017-09-05 19:18 ` [PATCH v3 0/9] ARM64: dts: meson: update around mmc Kevin Hilman
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