MLK-11502 dts: imx7d-sdb: change ramp up delay for VDD_SD1 regulator

Currently the ramp up delay for VDD_SD1 regulator is 1s, the delay
is added in the following patch:

   commit 558c8cde973b9b2abf9a69e3be5a887d38185da3
   MLK-11277 dts: imx7d-sdb: add ramp up delay for VDD_SD1 regulator

Here we find this delay will also impact the sd1 resume time cost, and
1s is too much for the sd1 resume, so we try to reduce the delay time
of this VDD_SD1 regulator, finally 200ms pass our test.

This patch change the ramp up delay for VDD_SD1 regulator from 1s to
200ms.

Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
(cherry picked from commit 16523e1bd8613c38b8182da36fdae99564980e24)

diff --git a/arch/arm/boot/dts/imx7d-sdb.dts b/arch/arm/boot/dts/imx7d-sdb.dts
index fe177d2..02b766b 100644 (file)
--- a/arch/arm/boot/dts/imx7d-sdb.dts
+++ b/arch/arm/boot/dts/imx7d-sdb.dts
@@ -111,7 +111,7 @@
                        regulator-min-microvolt = <3300000>;
                        regulator-max-microvolt = <3300000>;
                        gpio = <&gpio5 2 GPIO_ACTIVE_HIGH>;
-                       startup-delay-us = <1000000>;
+                       startup-delay-us = <200000>;
                        enable-active-high;
                };