forked from Minki/linux
ff10e353a4
Add support for the drive strength configuration. Usually, this value is expressed in mA. Since the numeric value depends on VDDIOP voltage, a value we can't retrieve at runtime, the controller uses low, medium and high to define the drive strength. The PIO controller accepts two values for the low drive configuration: 0 and 1. Most of the time, we don't care about the drive strength. So we keep the default value which is 0. The drive strength is advertised through the sysfs only when it has been explicitly set in the device tree i.e. if its value is different from 0. Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/*
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* This header provides constants for most at91 pinctrl bindings.
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*
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* Copyright (C) 2013 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* GPLv2 only
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*/
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#ifndef __DT_BINDINGS_AT91_PINCTRL_H__
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#define __DT_BINDINGS_AT91_PINCTRL_H__
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#define AT91_PINCTRL_NONE (0 << 0)
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#define AT91_PINCTRL_PULL_UP (1 << 0)
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#define AT91_PINCTRL_MULTI_DRIVE (1 << 1)
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#define AT91_PINCTRL_DEGLITCH (1 << 2)
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#define AT91_PINCTRL_PULL_DOWN (1 << 3)
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#define AT91_PINCTRL_DIS_SCHMIT (1 << 4)
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#define AT91_PINCTRL_OUTPUT (1 << 7)
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#define AT91_PINCTRL_OUTPUT_VAL(x) ((x & 0x1) << 8)
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#define AT91_PINCTRL_DEBOUNCE (1 << 16)
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#define AT91_PINCTRL_DEBOUNCE_VAL(x) (x << 17)
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#define AT91_PINCTRL_PULL_UP_DEGLITCH (AT91_PINCTRL_PULL_UP | AT91_PINCTRL_DEGLITCH)
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#define AT91_PINCTRL_DRIVE_STRENGTH_DEFAULT (0x0 << 5)
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#define AT91_PINCTRL_DRIVE_STRENGTH_LOW (0x1 << 5)
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#define AT91_PINCTRL_DRIVE_STRENGTH_MED (0x2 << 5)
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#define AT91_PINCTRL_DRIVE_STRENGTH_HI (0x3 << 5)
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#define AT91_PIOA 0
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#define AT91_PIOB 1
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#define AT91_PIOC 2
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#define AT91_PIOD 3
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#define AT91_PIOE 4
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#define AT91_PERIPH_GPIO 0
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#define AT91_PERIPH_A 1
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#define AT91_PERIPH_B 2
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#define AT91_PERIPH_C 3
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#define AT91_PERIPH_D 4
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#define ATMEL_PIO_DRVSTR_LO 1
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#define ATMEL_PIO_DRVSTR_ME 2
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#define ATMEL_PIO_DRVSTR_HI 3
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#endif /* __DT_BINDINGS_AT91_PINCTRL_H__ */
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