This patch fixes a potential race between the irq handler and the probe
and remove functions.

The irq should not be requested before the chargers power_supply has been
registered and has to be freed before the power_supply is unregistered,
otherwise it is possible that the irq fires while the power_supply is not
initialized yet or has already been freed.

While we are at it replace request_irq with request_any_context_irq.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NAnton Vorontsov <cbouatmailru@gmail.com>

This patch sets a default name for the power_supply in case there was
no name supplied through the platform_data.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NAnton Vorontsov <cbouatmailru@gmail.com>

Since kzalloc can return NULL we have to check its result.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NVasiliy Kulikov <segoon@openwall.com>
Signed-off-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NAnton Vorontsov <cbouatmailru@gmail.com>

This patch adds a simple driver for chargers indicating their online
status through a GPIO pin.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NAnton Vorontsov <cbouatmailru@gmail.com>