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authorHeiko Stübner <heiko@sntech.de>2011-10-05 12:27:05 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-10-09 12:36:21 +0100
commit3f0292ae8bb100cc8f96106a3de277df48134887 (patch)
tree6638f4fb724c40042690364d9f682f7350f32110 /drivers/regulator/Kconfig
parente3efe6669bf9c3cbd955b5a2976c70d79e8fd745 (diff)
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/Kconfig9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index c7fd2c0e3f2..5e0c7b66473 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