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onewire: w1-gpio: add ext_pullup_enable pin in platform data

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In the process of porting boards to devicetree implemenation, we should
keep information about external circuitry where they belong - the
individual drivers.

This patch adds a way to specify a GPIO to drive the (optional) external
pull-up logic, rather than using a function pointer for that.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Acked-by: Ville Syrjälä <syrjala@sci.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daniel Mack
2012-07-25 22:54:29 +02:00
committed by Greg Kroah-Hartman
parent 5f3d1382e3
commit d2323cf773
2 changed files with 18 additions and 1 deletions
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include/linux/w1-gpio.h
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@@ -19,6 +19,7 @@ struct w1_gpio_platform_data {
unsigned int pin;
unsigned int is_open_drain:1;
void (*enable_external_pullup)(int enable);
unsigned int ext_pullup_enable_pin;
};
#endif /* _LINUX_W1_GPIO_H */