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| author | Heiko Stübner <heiko@sntech.de> | 2011-10-05 12:27:05 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-10-09 12:36:21 +0100 |
| commit | 3f0292ae8bb100cc8f96106a3de277df48134887 (patch) | |
| tree | 6638f4fb724c40042690364d9f682f7350f32110 /drivers/regulator/Kconfig | |
| parent | e3efe6669bf9c3cbd955b5a2976c70d79e8fd745 (diff) | |
| download | linux-exynos-3f0292ae8bb100cc8f96106a3de277df48134887.tar.gz linux-exynos-3f0292ae8bb100cc8f96106a3de277df48134887.tar.bz2 linux-exynos-3f0292ae8bb100cc8f96106a3de277df48134887.zip | |
regulator: Add driver for gpio-controlled regulators
This patch adds support for regulators that can be controlled via gpios.
Examples for such regulators are the TI-tps65024x voltage regulators
with 4 fixed and 1 runtime-switchable voltage regulators
or the TI-bq240XX charger regulators.
The number of controlling gpios is not limited, the mapping between
voltage/current and target gpio state is done via the states map
and the driver can be used for either voltage or current regulators.
A mapping for a regulator with two GPIOs could look like:
gpios = {
{ .gpio = GPIO1, .flags = GPIOF_OUT_INIT_HIGH, .label = "gpio name 1" },
{ .gpio = GPIO2, .flags = GPIOF_OUT_INIT_LOW, .label = "gpio name 2" },
}
The flags element of the gpios array determines the initial state of
the gpio, set during probe. The initial state of the regulator is also
calculated from these values
states = {
{ .value = volt_or_cur1, .gpios = (0 << 1) | (0 << 0) },
{ .value = volt_or_cur2, .gpios = (0 << 1) | (1 << 0) },
{ .value = volt_or_cur3, .gpios = (1 << 1) | (0 << 0) },
{ .value = volt_or_cur4, .gpios = (1 << 1) | (1 << 0) },
}
The target-state for the n-th gpio is determined by the n-th bit
in the bitfield of the target-value.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/Kconfig')
| -rw-r--r-- | drivers/regulator/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index c7fd2c0e3f2b..5e0c7b664732 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -64,6 +64,15 @@ config REGULATOR_USERSPACE_CONSUMER If unsure, say no. +config REGULATOR_GPIO + tristate "GPIO regulator support" + help + This driver provides support for regulators that can be + controlled via gpios. + It is capable of supporting current and voltage regulators + and the platform has to provide a mapping of GPIO-states + to target volts/amps. + config REGULATOR_BQ24022 tristate "TI bq24022 Dual Input 1-Cell Li-Ion Charger IC" help |