[PATCH v3 0/4] regulator: core: support shared enable GPIO

From: Kim, Milo
Date: Mon Feb 18 2013 - 01:51:04 EST

A Regulator can be enabled by external GPIO pin which is configurable in the
At this moment, the GPIO can be owned by only one regulator device.
In some devices like LP8788 LDOs, multiple regulators are enabled by shared
one GPIO pin.
This patch-set enables shared enable GPIO concept and fix LP8788 LDO driver
as well.

Patches were generated based on 'for-next' of regulator.git

Patch v3.
a) Add a reference count, 'request_count' which makes sure only free the GPIO
when it has no users
b) Make return type of regulator_ena_gpio_ctrl()
c) Free the GPIO when kzalloc() gets failed in regulator_ena_gpio_request()
d) Add a pointer to the GPIO structure to the regulator_dev on setting the GPIO
: use a GPIO structure directly instead of scanning the GPIO list

Patch v2.
a) Add a list for enable GPIO
b) Add a reference count, 'enable_count' for actual pin control

Patch v1.
Initial patch

Milo(Woogyom) Kim (4):
regulator: core: support shared enable GPIO concept
regulator: core: manage enable GPIO list
regulator: core: use regulator_ena_pin member
regulator: lp8788-ldo: use ena_pin of regulator-core for external control

drivers/regulator/core.c | 142 +++++++++++++++++++++++++++++++++-----
drivers/regulator/lp8788-ldo.c | 98 +++++---------------------
include/linux/regulator/driver.h | 4 +-
3 files changed, 142 insertions(+), 102 deletions(-)


Best Regards,

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