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Revert "regulator: of: Use regulator-init-microvolt as early minimum"

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This reverts commit a4e0323d13.

If uboot needs a high cpu rate, the voltage should be set to a high
value, and the minimal voltage of regulator will also be set to this
value during kernel startup, so it will be failed to set voltage which
is less than this value when consumers change voltage, for example pvtm.

This patch add a new 'regulator-early-min-microvolt' property to limit
the minimal voltage of regulator during kernel startup and it will no
longer be restricted by uboot.

Change-Id: Ia50920b7627f886fab5c9f65a3fc19946debdff2
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
This commit is contained in:
Finley Xiao
2018-08-27 17:43:05 +08:00
committed by Tao Huang
parent 90cb7171b8
commit 8726e76f58
2 changed files with 3 additions and 4 deletions
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5
Documentation/devicetree/bindings/regulator/regulator.txt
View File

@@ -5,9 +5,8 @@ Optional properties:
- regulator-min-microvolt: smallest voltage consumers may set
- regulator-max-microvolt: largest voltage consumers may set
- regulator-microvolt-offset: Offset applied to voltages to compensate for voltage drops
- regulator-init-microvolt: Set by bootloader or when initialising, in order to
make sure the voltage can suit the needs of all regulator consumers during
system startup.
- regulator-early-min-microvolt: minimum voltage during system startup, make sure we
select a voltage that suits the needs of all regulator consumers
- regulator-min-microamp: smallest current consumers may set
- regulator-max-microamp: largest current consumers may set
- regulator-input-current-limit-microamp: maximum input current regulator allows

2
drivers/regulator/of_regulator.c
View File

@@ -42,7 +42,7 @@ static void of_get_regulation_constraints(struct device_node *np,
if (!of_property_read_u32(np, "regulator-max-microvolt", &pval))
constraints->max_uV = pval;
if (!of_property_read_u32(np, "regulator-init-microvolt", &pval))
if (!of_property_read_u32(np, "regulator-early-min-microvolt", &pval))
constraints->early_min_uV = pval;
/* Voltage change possible? */