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601b29aa48
In addition to the regular mux configuration such as mux mode 1, 2 etc, certain pins of DRA7 require to have "virtual mode" also programmed. This allows for predefined delay characteristics to be used by the SoC to meet timing characterstics needed for the interface. Provide easy to use macro to do the same. It is important to note that the official TI guidelines recommend to do as minimal pin reconfiguration beyond the bootloader given the design of the hardware involved which can result in substantial glitches which may impair functionality of certain peripherals. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/*
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* This header provides constants for DRA pinctrl bindings.
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*
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* Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Rajendra Nayak <rnayak@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _DT_BINDINGS_PINCTRL_DRA_H
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#define _DT_BINDINGS_PINCTRL_DRA_H
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/* DRA7 mux mode options for each pin. See TRM for options */
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#define MUX_MODE0 0x0
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#define MUX_MODE1 0x1
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#define MUX_MODE2 0x2
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#define MUX_MODE3 0x3
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#define MUX_MODE4 0x4
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#define MUX_MODE5 0x5
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#define MUX_MODE6 0x6
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#define MUX_MODE7 0x7
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#define MUX_MODE8 0x8
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#define MUX_MODE9 0x9
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#define MUX_MODE10 0xa
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#define MUX_MODE11 0xb
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#define MUX_MODE12 0xc
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#define MUX_MODE13 0xd
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#define MUX_MODE14 0xe
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#define MUX_MODE15 0xf
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/* Certain pins need virtual mode, but note: they may glitch */
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#define MUX_VIRTUAL_MODE0 (MODE_SELECT | (0x0 << 4))
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#define MUX_VIRTUAL_MODE1 (MODE_SELECT | (0x1 << 4))
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#define MUX_VIRTUAL_MODE2 (MODE_SELECT | (0x2 << 4))
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#define MUX_VIRTUAL_MODE3 (MODE_SELECT | (0x3 << 4))
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#define MUX_VIRTUAL_MODE4 (MODE_SELECT | (0x4 << 4))
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#define MUX_VIRTUAL_MODE5 (MODE_SELECT | (0x5 << 4))
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#define MUX_VIRTUAL_MODE6 (MODE_SELECT | (0x6 << 4))
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#define MUX_VIRTUAL_MODE7 (MODE_SELECT | (0x7 << 4))
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#define MUX_VIRTUAL_MODE8 (MODE_SELECT | (0x8 << 4))
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#define MUX_VIRTUAL_MODE9 (MODE_SELECT | (0x9 << 4))
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#define MUX_VIRTUAL_MODE10 (MODE_SELECT | (0xa << 4))
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#define MUX_VIRTUAL_MODE11 (MODE_SELECT | (0xb << 4))
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#define MUX_VIRTUAL_MODE12 (MODE_SELECT | (0xc << 4))
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#define MUX_VIRTUAL_MODE13 (MODE_SELECT | (0xd << 4))
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#define MUX_VIRTUAL_MODE14 (MODE_SELECT | (0xe << 4))
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#define MUX_VIRTUAL_MODE15 (MODE_SELECT | (0xf << 4))
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#define MODE_SELECT (1 << 8)
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#define PULL_ENA (0 << 16)
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#define PULL_DIS (1 << 16)
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#define PULL_UP (1 << 17)
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#define INPUT_EN (1 << 18)
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#define SLEWCONTROL (1 << 19)
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#define WAKEUP_EN (1 << 24)
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#define WAKEUP_EVENT (1 << 25)
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/* Active pin states */
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#define PIN_OUTPUT (0 | PULL_DIS)
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#define PIN_OUTPUT_PULLUP (PULL_UP)
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#define PIN_OUTPUT_PULLDOWN (0)
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#define PIN_INPUT (INPUT_EN | PULL_DIS)
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#define PIN_INPUT_SLEW (INPUT_EN | SLEWCONTROL)
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#define PIN_INPUT_PULLUP (PULL_ENA | INPUT_EN | PULL_UP)
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#define PIN_INPUT_PULLDOWN (PULL_ENA | INPUT_EN)
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#endif
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