From: Axel Lin Date: Thu, 7 Jun 2012 02:05:14 +0000 (+0800) Subject: regulator: core: Handle fixed voltage in map_voltage_linear X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5a6881e8e134ea636bbc8423049e84638dbb7106;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git regulator: core: Handle fixed voltage in map_voltage_linear Fixed voltage is a kind of linear mapping where n_voltages is 1. This change allows [list|map]_voltage_linear to be used for fixed voltage. For fixed voltage, n_voltages is 1 and the only valid selector is 0. Thus we actually don't care the uV_step setting. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 8521e0d6b3bc..5c6aedaa934d 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2070,6 +2070,14 @@ int regulator_map_voltage_linear(struct regulator_dev *rdev, { int ret, voltage; + /* Allow uV_step to be 0 for fixed voltage */ + if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) { + if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV) + return 0; + else + return -EINVAL; + } + if (!rdev->desc->uV_step) { BUG_ON(!rdev->desc->uV_step); return -EINVAL;