Message ID | 20170831135226.19784-6-jbrunet@baylibre.com (mailing list archive) |
---|---|
State | Accepted |
Headers | show
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Thu, 31 Aug 2017 06:52:35 -0700 (PDT) From: Jerome Brunet <jbrunet@baylibre.com> To: Kevin Hilman <khilman@baylibre.com>, Carlo Caione <carlo@caione.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 Message-Id: <20170831135226.19784-6-jbrunet@baylibre.com> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20170831135226.19784-1-jbrunet@baylibre.com> References: <20170831135226.19784-1-jbrunet@baylibre.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170831_145254_271078_6148231E X-CRM114-Status: UNSURE ( 9.78 ) X-CRM114-Notice: Please train this message. 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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 {
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(+)