613 строки
25 KiB
C
613 строки
25 KiB
C
/*
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* Copyright (C) 2016 IBM Corp.
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef PINCTRL_ASPEED
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#define PINCTRL_ASPEED
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/pinctrl/pinconf-generic.h>
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#include <linux/regmap.h>
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/*
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* The ASPEED SoCs provide typically more than 200 pins for GPIO and other
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* functions. The SoC function enabled on a pin is determined on a priority
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* basis where a given pin can provide a number of different signal types.
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*
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* The signal active on a pin is described by both a priority level and
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* compound logical expressions involving multiple operators, registers and
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* bits. Some difficulty arises as the pin's function bit masks for each
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* priority level are frequently not the same (i.e. cannot just flip a bit to
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* change from a high to low priority signal), or even in the same register.
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* Further, not all signals can be unmuxed, as some expressions depend on
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* values in the hardware strapping register (which is treated as read-only).
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*
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* SoC Multi-function Pin Expression Examples
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* ------------------------------------------
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*
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* Here are some sample mux configurations from the AST2400 and AST2500
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* datasheets to illustrate the corner cases, roughly in order of least to most
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* corner. The signal priorities are in decending order from P0 (highest).
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*
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* D6 is a pin with a single function (beside GPIO); a high priority signal
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* that participates in one function:
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*
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* Ball | Default | P0 Signal | P0 Expression | P1 Signal | P1 Expression | Other
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* -----+---------+-----------+-----------------------------+-----------+---------------+----------
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* D6 GPIOA0 MAC1LINK SCU80[0]=1 GPIOA0
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* -----+---------+-----------+-----------------------------+-----------+---------------+----------
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*
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* C5 is a multi-signal pin (high and low priority signals). Here we touch
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* different registers for the different functions that enable each signal:
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*
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* -----+---------+-----------+-----------------------------+-----------+---------------+----------
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* C5 GPIOA4 SCL9 SCU90[22]=1 TIMER5 SCU80[4]=1 GPIOA4
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* -----+---------+-----------+-----------------------------+-----------+---------------+----------
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*
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* E19 is a single-signal pin with two functions that influence the active
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* signal. In this case both bits have the same meaning - enable a dedicated
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* LPC reset pin. However it's not always the case that the bits in the
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* OR-relationship have the same meaning.
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*
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* -----+---------+-----------+-----------------------------+-----------+---------------+----------
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* E19 GPIOB4 LPCRST# SCU80[12]=1 | Strap[14]=1 GPIOB4
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* -----+---------+-----------+-----------------------------+-----------+---------------+----------
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*
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* For example, pin B19 has a low-priority signal that's enabled by two
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* distinct SoC functions: A specific SIOPBI bit in register SCUA4, and an ACPI
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* bit in the STRAP register. The ACPI bit configures signals on pins in
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* addition to B19. Both of the low priority functions as well as the high
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* priority function must be disabled for GPIOF1 to be used.
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*
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* Ball | Default | P0 Signal | P0 Expression | P1 Signal | P1 Expression | Other
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* -----+---------+-----------+-----------------------------------------+-----------+----------------------------------------+----------
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* B19 GPIOF1 NDCD4 SCU80[25]=1 SIOPBI# SCUA4[12]=1 | Strap[19]=0 GPIOF1
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* -----+---------+-----------+-----------------------------------------+-----------+----------------------------------------+----------
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*
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* For pin E18, the SoC ANDs the expected state of three bits to determine the
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* pin's active signal:
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*
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* * SCU3C[3]: Enable external SOC reset function
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* * SCU80[15]: Enable SPICS1# or EXTRST# function pin
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* * SCU90[31]: Select SPI interface CS# output
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*
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* -----+---------+-----------+-----------------------------------------+-----------+----------------------------------------+----------
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* E18 GPIOB7 EXTRST# SCU3C[3]=1 & SCU80[15]=1 & SCU90[31]=0 SPICS1# SCU3C[3]=1 & SCU80[15]=1 & SCU90[31]=1 GPIOB7
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* -----+---------+-----------+-----------------------------------------+-----------+----------------------------------------+----------
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*
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* (Bits SCU3C[3] and SCU80[15] appear to only be used in the expressions for
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* selecting the signals on pin E18)
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*
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* Pin T5 is a multi-signal pin with a more complex configuration:
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*
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* Ball | Default | P0 Signal | P0 Expression | P1 Signal | P1 Expression | Other
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* -----+---------+-----------+------------------------------+-----------+---------------+----------
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* T5 GPIOL1 VPIDE SCU90[5:4]!=0 & SCU84[17]=1 NDCD1 SCU84[17]=1 GPIOL1
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* -----+---------+-----------+------------------------------+-----------+---------------+----------
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*
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* The high priority signal configuration is best thought of in terms of its
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* exploded form, with reference to the SCU90[5:4] bits:
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*
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* * SCU90[5:4]=00: disable
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* * SCU90[5:4]=01: 18 bits (R6/G6/B6) video mode.
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* * SCU90[5:4]=10: 24 bits (R8/G8/B8) video mode.
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* * SCU90[5:4]=11: 30 bits (R10/G10/B10) video mode.
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*
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* Re-writing:
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*
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* -----+---------+-----------+------------------------------+-----------+---------------+----------
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* T5 GPIOL1 VPIDE (SCU90[5:4]=1 & SCU84[17]=1) NDCD1 SCU84[17]=1 GPIOL1
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* | (SCU90[5:4]=2 & SCU84[17]=1)
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* | (SCU90[5:4]=3 & SCU84[17]=1)
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* -----+---------+-----------+------------------------------+-----------+---------------+----------
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*
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* For reference the SCU84[17] bit configure the "UART1 NDCD1 or Video VPIDE
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* function pin", where the signal itself is determined by whether SCU94[5:4]
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* is disabled or in one of the 18, 24 or 30bit video modes.
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*
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* Other video-input-related pins require an explicit state in SCU90[5:4], e.g.
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* W1 and U5:
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*
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* -----+---------+-----------+------------------------------+-----------+---------------+----------
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* W1 GPIOL6 VPIB0 SCU90[5:4]=3 & SCU84[22]=1 TXD1 SCU84[22]=1 GPIOL6
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* U5 GPIOL7 VPIB1 SCU90[5:4]=3 & SCU84[23]=1 RXD1 SCU84[23]=1 GPIOL7
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* -----+---------+-----------+------------------------------+-----------+---------------+----------
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*
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* The examples of T5 and W1 are particularly fertile, as they also demonstrate
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* that despite operating as part of the video input bus each signal needs to
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* be enabled individually via it's own SCU84 (in the cases of T5 and W1)
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* register bit. This is a little crazy if the bus doesn't have optional
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* signals, but is used to decent effect with some of the UARTs where not all
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* signals are required. However, this isn't done consistently - UART1 is
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* enabled on a per-pin basis, and by contrast, all signals for UART6 are
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* enabled by a single bit.
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*
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* Further, the high and low priority signals listed in the table above share
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* a configuration bit. The VPI signals should operate in concert in a single
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* function, but the UART signals should retain the ability to be configured
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* independently. This pushes the implementation down the path of tagging a
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* signal's expressions with the function they participate in, rather than
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* defining masks affecting multiple signals per function. The latter approach
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* fails in this instance where applying the configuration for the UART pin of
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* interest will stomp on the state of other UART signals when disabling the
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* VPI functions on the current pin.
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*
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* Ball | Default | P0 Signal | P0 Expression | P1 Signal | P1 Expression | Other
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* -----+------------+-----------+---------------------------+-----------+---------------+------------
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* A12 RGMII1TXCK GPIOT0 SCUA0[0]=1 RMII1TXEN Strap[6]=0 RGMII1TXCK
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* B12 RGMII1TXCTL GPIOT1 SCUA0[1]=1 – Strap[6]=0 RGMII1TXCTL
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* -----+------------+-----------+---------------------------+-----------+---------------+------------
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*
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* A12 demonstrates that the "Other" signal isn't always GPIO - in this case
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* GPIOT0 is a high-priority signal and RGMII1TXCK is Other. Thus, GPIO
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* should be treated like any other signal type with full function expression
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* requirements, and not assumed to be the default case. Separately, GPIOT0 and
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* GPIOT1's signal descriptor bits are distinct, therefore we must iterate all
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* pins in the function's group to disable the higher-priority signals such
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* that the signal for the function of interest is correctly enabled.
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*
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* Finally, three priority levels aren't always enough; the AST2500 brings with
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* it 18 pins of five priority levels, however the 18 pins only use three of
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* the five priority levels.
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*
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* Ultimately the requirement to control pins in the examples above drive the
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* design:
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*
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* * Pins provide signals according to functions activated in the mux
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* configuration
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*
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* * Pins provide up to five signal types in a priority order
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*
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* * For priorities levels defined on a pin, each priority provides one signal
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*
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* * Enabling lower priority signals requires higher priority signals be
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* disabled
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*
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* * A function represents a set of signals; functions are distinct if their
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* sets of signals are not equal
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*
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* * Signals participate in one or more functions
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*
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* * A function is described by an expression of one or more signal
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* descriptors, which compare bit values in a register
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*
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* * A signal expression is the smallest set of signal descriptors whose
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* comparisons must evaluate 'true' for a signal to be enabled on a pin.
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*
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* * A function's signal is active on a pin if evaluating all signal
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* descriptors in the pin's signal expression for the function yields a 'true'
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* result
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*
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* * A signal at a given priority on a given pin is active if any of the
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* functions in which the signal participates are active, and no higher
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* priority signal on the pin is active
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*
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* * GPIO is configured per-pin
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*
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* And so:
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*
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* * To disable a signal, any function(s) activating the signal must be
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* disabled
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*
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* * Each pin must know the signal expressions of functions in which it
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* participates, for the purpose of enabling the Other function. This is done
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* by deactivating all functions that activate higher priority signals on the
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* pin.
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*
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* As a concrete example:
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*
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* * T5 provides three signals types: VPIDE, NDCD1 and GPIO
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*
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* * The VPIDE signal participates in 3 functions: VPI18, VPI24 and VPI30
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*
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* * The NDCD1 signal participates in just its own NDCD1 function
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*
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* * VPIDE is high priority, NDCD1 is low priority, and GPIOL1 is the least
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* prioritised
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*
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* * The prerequisit for activating the NDCD1 signal is that the VPI18, VPI24
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* and VPI30 functions all be disabled
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*
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* * Similarly, all of VPI18, VPI24, VPI30 and NDCD1 functions must be disabled
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* to provide GPIOL6
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*
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* Considerations
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* --------------
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*
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* If pinctrl allows us to allocate a pin we can configure a function without
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* concern for the function of already allocated pins, if pin groups are
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* created with respect to the SoC functions in which they participate. This is
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* intuitive, but it did not feel obvious from the bit/pin relationships.
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*
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* Conversely, failing to allocate all pins in a group indicates some bits (as
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* well as pins) required for the group's configuration will already be in use,
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* likely in a way that's inconsistent with the requirements of the failed
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* group.
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*/
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#define ASPEED_IP_SCU 0
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#define ASPEED_IP_GFX 1
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#define ASPEED_IP_LPC 2
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#define ASPEED_NR_PINMUX_IPS 3
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/*
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* The "Multi-function Pins Mapping and Control" table in the SoC datasheet
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* references registers by the device/offset mnemonic. The register macros
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* below are named the same way to ease transcription and verification (as
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* opposed to naming them e.g. PINMUX_CTRL_[0-9]). Further, signal expressions
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* reference registers beyond those dedicated to pinmux, such as the system
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* reset control and MAC clock configuration registers. The AST2500 goes a step
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* further and references registers in the graphics IP block, but that isn't
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* handled yet.
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*/
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#define SCU2C 0x2C /* Misc. Control Register */
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#define SCU3C 0x3C /* System Reset Control/Status Register */
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#define SCU48 0x48 /* MAC Interface Clock Delay Setting */
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#define HW_STRAP1 0x70 /* AST2400 strapping is 33 bits, is split */
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#define SCU80 0x80 /* Multi-function Pin Control #1 */
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#define SCU84 0x84 /* Multi-function Pin Control #2 */
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#define SCU88 0x88 /* Multi-function Pin Control #3 */
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#define SCU8C 0x8C /* Multi-function Pin Control #4 */
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#define SCU90 0x90 /* Multi-function Pin Control #5 */
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#define SCU94 0x94 /* Multi-function Pin Control #6 */
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#define SCUA0 0xA0 /* Multi-function Pin Control #7 */
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#define SCUA4 0xA4 /* Multi-function Pin Control #8 */
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#define SCUA8 0xA8 /* Multi-function Pin Control #9 */
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#define SCUAC 0xAC /* Multi-function Pin Control #10 */
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#define HW_STRAP2 0xD0 /* Strapping */
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/**
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* A signal descriptor, which describes the register, bits and the
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* enable/disable values that should be compared or written.
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*
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* @ip: The IP block identifier, used as an index into the regmap array in
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* struct aspeed_pinctrl_data
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* @reg: The register offset with respect to the base address of the IP block
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* @mask: The mask to apply to the register. The lowest set bit of the mask is
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* used to derive the shift value.
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* @enable: The value that enables the function. Value should be in the LSBs,
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* not at the position of the mask.
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* @disable: The value that disables the function. Value should be in the
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* LSBs, not at the position of the mask.
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*/
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struct aspeed_sig_desc {
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unsigned int ip;
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unsigned int reg;
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u32 mask;
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u32 enable;
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u32 disable;
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};
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/**
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* Describes a signal expression. The expression is evaluated by ANDing the
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* evaluation of the descriptors.
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*
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* @signal: The signal name for the priority level on the pin. If the signal
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* type is GPIO, then the signal name must begin with the string
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* "GPIO", e.g. GPIOA0, GPIOT4 etc.
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* @function: The name of the function the signal participates in for the
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* associated expression
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* @ndescs: The number of signal descriptors in the expression
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* @descs: Pointer to an array of signal descriptors that comprise the
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* function expression
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*/
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struct aspeed_sig_expr {
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const char *signal;
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const char *function;
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int ndescs;
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const struct aspeed_sig_desc *descs;
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};
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/**
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* A struct capturing the list of expressions enabling signals at each priority
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* for a given pin. The signal configuration for a priority level is evaluated
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* by ORing the evaluation of the signal expressions in the respective
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* priority's list.
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*
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* @name: A name for the pin
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* @prios: A pointer to an array of expression list pointers
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*
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*/
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struct aspeed_pin_desc {
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const char *name;
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const struct aspeed_sig_expr ***prios;
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};
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/* Macro hell */
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#define SIG_DESC_IP_BIT(ip, reg, idx, val) \
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{ ip, reg, BIT_MASK(idx), val, (((val) + 1) & 1) }
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/**
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* Short-hand macro for describing an SCU descriptor enabled by the state of
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* one bit. The disable value is derived.
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*
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* @reg: The signal's associated register, offset from base
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* @idx: The signal's bit index in the register
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* @val: The value (0 or 1) that enables the function
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*/
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#define SIG_DESC_BIT(reg, idx, val) \
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SIG_DESC_IP_BIT(ASPEED_IP_SCU, reg, idx, val)
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#define SIG_DESC_IP_SET(ip, reg, idx) SIG_DESC_IP_BIT(ip, reg, idx, 1)
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/**
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* A further short-hand macro expanding to an SCU descriptor enabled by a set
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* bit.
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*
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* @reg: The register, offset from base
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* @idx: The bit index in the register
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*/
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#define SIG_DESC_SET(reg, idx) SIG_DESC_IP_BIT(ASPEED_IP_SCU, reg, idx, 1)
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#define SIG_DESC_LIST_SYM(sig, func) sig_descs_ ## sig ## _ ## func
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#define SIG_DESC_LIST_DECL(sig, func, ...) \
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static const struct aspeed_sig_desc SIG_DESC_LIST_SYM(sig, func)[] = \
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{ __VA_ARGS__ }
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#define SIG_EXPR_SYM(sig, func) sig_expr_ ## sig ## _ ## func
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#define SIG_EXPR_DECL_(sig, func) \
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static const struct aspeed_sig_expr SIG_EXPR_SYM(sig, func) = \
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{ \
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.signal = #sig, \
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.function = #func, \
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.ndescs = ARRAY_SIZE(SIG_DESC_LIST_SYM(sig, func)), \
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.descs = &(SIG_DESC_LIST_SYM(sig, func))[0], \
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}
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/**
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* Declare a signal expression.
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*
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* @sig: A macro symbol name for the signal (is subjected to stringification
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* and token pasting)
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* @func: The function in which the signal is participating
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* @...: Signal descriptors that define the signal expression
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*
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* For example, the following declares the ROMD8 signal for the ROM16 function:
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*
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* SIG_EXPR_DECL(ROMD8, ROM16, SIG_DESC_SET(SCU90, 6));
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*
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* And with multiple signal descriptors:
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*
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* SIG_EXPR_DECL(ROMD8, ROM16S, SIG_DESC_SET(HW_STRAP1, 4),
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* { HW_STRAP1, GENMASK(1, 0), 0, 0 });
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*/
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#define SIG_EXPR_DECL(sig, func, ...) \
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SIG_DESC_LIST_DECL(sig, func, __VA_ARGS__); \
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SIG_EXPR_DECL_(sig, func)
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/**
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* Declare a pointer to a signal expression
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*
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* @sig: The macro symbol name for the signal (subjected to token pasting)
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* @func: The macro symbol name for the function (subjected to token pasting)
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*/
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#define SIG_EXPR_PTR(sig, func) (&SIG_EXPR_SYM(sig, func))
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#define SIG_EXPR_LIST_SYM(sig) sig_exprs_ ## sig
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/**
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* Declare a signal expression list for reference in a struct aspeed_pin_prio.
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*
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* @sig: A macro symbol name for the signal (is subjected to token pasting)
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* @...: Signal expression structure pointers (use SIG_EXPR_PTR())
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*
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* For example, the 16-bit ROM bus can be enabled by one of two possible signal
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* expressions:
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*
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* SIG_EXPR_DECL(ROMD8, ROM16, SIG_DESC_SET(SCU90, 6));
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* SIG_EXPR_DECL(ROMD8, ROM16S, SIG_DESC_SET(HW_STRAP1, 4),
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* { HW_STRAP1, GENMASK(1, 0), 0, 0 });
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* SIG_EXPR_LIST_DECL(ROMD8, SIG_EXPR_PTR(ROMD8, ROM16),
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* SIG_EXPR_PTR(ROMD8, ROM16S));
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*/
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#define SIG_EXPR_LIST_DECL(sig, ...) \
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static const struct aspeed_sig_expr *SIG_EXPR_LIST_SYM(sig)[] = \
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{ __VA_ARGS__, NULL }
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/**
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* A short-hand macro for declaring a function expression and an expression
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* list with a single function.
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*
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* @func: A macro symbol name for the function (is subjected to token pasting)
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* @...: Function descriptors that define the function expression
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*
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* For example, signal NCTS6 participates in its own function with one group:
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*
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* SIG_EXPR_LIST_DECL_SINGLE(NCTS6, NCTS6, SIG_DESC_SET(SCU90, 7));
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*/
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#define SIG_EXPR_LIST_DECL_SINGLE(sig, func, ...) \
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SIG_DESC_LIST_DECL(sig, func, __VA_ARGS__); \
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SIG_EXPR_DECL_(sig, func); \
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SIG_EXPR_LIST_DECL(sig, SIG_EXPR_PTR(sig, func))
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#define SIG_EXPR_LIST_DECL_DUAL(sig, f0, f1) \
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SIG_EXPR_LIST_DECL(sig, SIG_EXPR_PTR(sig, f0), SIG_EXPR_PTR(sig, f1))
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#define SIG_EXPR_LIST_PTR(sig) (&SIG_EXPR_LIST_SYM(sig)[0])
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#define PIN_EXPRS_SYM(pin) pin_exprs_ ## pin
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#define PIN_EXPRS_PTR(pin) (&PIN_EXPRS_SYM(pin)[0])
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#define PIN_SYM(pin) pin_ ## pin
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#define MS_PIN_DECL_(pin, ...) \
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static const struct aspeed_sig_expr **PIN_EXPRS_SYM(pin)[] = \
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{ __VA_ARGS__, NULL }; \
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static const struct aspeed_pin_desc PIN_SYM(pin) = \
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{ #pin, PIN_EXPRS_PTR(pin) }
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/**
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* Declare a multi-signal pin
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*
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* @pin: The pin number
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* @other: Macro name for "other" functionality (subjected to stringification)
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* @high: Macro name for the highest priority signal functions
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* @low: Macro name for the low signal functions
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*
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* For example:
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*
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* #define A8 56
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* SIG_EXPR_DECL(ROMD8, ROM16, SIG_DESC_SET(SCU90, 6));
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* SIG_EXPR_DECL(ROMD8, ROM16S, SIG_DESC_SET(HW_STRAP1, 4),
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* { HW_STRAP1, GENMASK(1, 0), 0, 0 });
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* SIG_EXPR_LIST_DECL(ROMD8, SIG_EXPR_PTR(ROMD8, ROM16),
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* SIG_EXPR_PTR(ROMD8, ROM16S));
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* SIG_EXPR_LIST_DECL_SINGLE(NCTS6, NCTS6, SIG_DESC_SET(SCU90, 7));
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* MS_PIN_DECL(A8, GPIOH0, ROMD8, NCTS6);
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*/
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#define MS_PIN_DECL(pin, other, high, low) \
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SIG_EXPR_LIST_DECL_SINGLE(other, other); \
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MS_PIN_DECL_(pin, \
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SIG_EXPR_LIST_PTR(high), \
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SIG_EXPR_LIST_PTR(low), \
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SIG_EXPR_LIST_PTR(other))
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#define PIN_GROUP_SYM(func) pins_ ## func
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#define FUNC_GROUP_SYM(func) groups_ ## func
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#define FUNC_GROUP_DECL(func, ...) \
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static const int PIN_GROUP_SYM(func)[] = { __VA_ARGS__ }; \
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static const char *FUNC_GROUP_SYM(func)[] = { #func }
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/**
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* Declare a single signal pin
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*
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* @pin: The pin number
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* @other: Macro name for "other" functionality (subjected to stringification)
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* @sig: Macro name for the signal (subjected to stringification)
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*
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* For example:
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*
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* #define E3 80
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* SIG_EXPR_LIST_DECL_SINGLE(SCL5, I2C5, I2C5_DESC);
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* SS_PIN_DECL(E3, GPIOK0, SCL5);
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*/
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#define SS_PIN_DECL(pin, other, sig) \
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SIG_EXPR_LIST_DECL_SINGLE(other, other); \
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MS_PIN_DECL_(pin, SIG_EXPR_LIST_PTR(sig), SIG_EXPR_LIST_PTR(other))
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/**
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* Single signal, single function pin declaration
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*
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* @pin: The pin number
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* @other: Macro name for "other" functionality (subjected to stringification)
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* @sig: Macro name for the signal (subjected to stringification)
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* @...: Signal descriptors that define the function expression
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*
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* For example:
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*
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* SSSF_PIN_DECL(A4, GPIOA2, TIMER3, SIG_DESC_SET(SCU80, 2));
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*/
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#define SSSF_PIN_DECL(pin, other, sig, ...) \
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SIG_EXPR_LIST_DECL_SINGLE(sig, sig, __VA_ARGS__); \
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SIG_EXPR_LIST_DECL_SINGLE(other, other); \
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MS_PIN_DECL_(pin, SIG_EXPR_LIST_PTR(sig), SIG_EXPR_LIST_PTR(other)); \
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FUNC_GROUP_DECL(sig, pin)
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#define GPIO_PIN_DECL(pin, gpio) \
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SIG_EXPR_LIST_DECL_SINGLE(gpio, gpio); \
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MS_PIN_DECL_(pin, SIG_EXPR_LIST_PTR(gpio))
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/**
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* @param The pinconf parameter type
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* @pins The pin range this config struct covers, [low, high]
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* @reg The register housing the configuration bits
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* @mask The mask to select the bits of interest in @reg
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*/
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struct aspeed_pin_config {
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enum pin_config_param param;
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unsigned int pins[2];
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unsigned int reg;
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u8 bit;
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u8 value;
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};
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struct aspeed_pinctrl_data {
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struct regmap *maps[ASPEED_NR_PINMUX_IPS];
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const struct pinctrl_pin_desc *pins;
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const unsigned int npins;
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const struct aspeed_pin_group *groups;
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const unsigned int ngroups;
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const struct aspeed_pin_function *functions;
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const unsigned int nfunctions;
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const struct aspeed_pin_config *configs;
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const unsigned int nconfigs;
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};
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#define ASPEED_PINCTRL_PIN(name_) \
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[name_] = { \
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.number = name_, \
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.name = #name_, \
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.drv_data = (void *) &(PIN_SYM(name_)) \
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}
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struct aspeed_pin_group {
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const char *name;
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const unsigned int *pins;
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const unsigned int npins;
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};
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#define ASPEED_PINCTRL_GROUP(name_) { \
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.name = #name_, \
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.pins = &(PIN_GROUP_SYM(name_))[0], \
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.npins = ARRAY_SIZE(PIN_GROUP_SYM(name_)), \
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}
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struct aspeed_pin_function {
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const char *name;
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const char *const *groups;
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unsigned int ngroups;
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};
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#define ASPEED_PINCTRL_FUNC(name_, ...) { \
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.name = #name_, \
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.groups = &FUNC_GROUP_SYM(name_)[0], \
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.ngroups = ARRAY_SIZE(FUNC_GROUP_SYM(name_)), \
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}
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int aspeed_pinctrl_get_groups_count(struct pinctrl_dev *pctldev);
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const char *aspeed_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
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unsigned int group);
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int aspeed_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
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unsigned int group, const unsigned int **pins,
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unsigned int *npins);
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void aspeed_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
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struct seq_file *s, unsigned int offset);
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int aspeed_pinmux_get_fn_count(struct pinctrl_dev *pctldev);
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const char *aspeed_pinmux_get_fn_name(struct pinctrl_dev *pctldev,
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unsigned int function);
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int aspeed_pinmux_get_fn_groups(struct pinctrl_dev *pctldev,
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unsigned int function, const char * const **groups,
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unsigned int * const num_groups);
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int aspeed_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int function,
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unsigned int group);
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int aspeed_gpio_request_enable(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned int offset);
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int aspeed_pinctrl_probe(struct platform_device *pdev,
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struct pinctrl_desc *pdesc,
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struct aspeed_pinctrl_data *pdata);
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int aspeed_pin_config_get(struct pinctrl_dev *pctldev, unsigned int offset,
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unsigned long *config);
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int aspeed_pin_config_set(struct pinctrl_dev *pctldev, unsigned int offset,
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unsigned long *configs, unsigned int num_configs);
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int aspeed_pin_config_group_get(struct pinctrl_dev *pctldev,
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unsigned int selector,
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unsigned long *config);
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int aspeed_pin_config_group_set(struct pinctrl_dev *pctldev,
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unsigned int selector,
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unsigned long *configs,
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unsigned int num_configs);
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#endif /* PINCTRL_ASPEED */
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