pinctrl-aspeed.h

  1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 * Copyright (C) 2016 IBM Corp.
  4 */
  5
  6#ifndef PINCTRL_ASPEED
  7#define PINCTRL_ASPEED
  8
  9#include <linux/pinctrl/pinctrl.h>
 10#include <linux/pinctrl/pinmux.h>
 11#include <linux/pinctrl/pinconf.h>
 12#include <linux/pinctrl/pinconf-generic.h>
 13#include <linux/regmap.h>
 14
 15#include "pinmux-aspeed.h"
 16
 17/**
 18 * @param The pinconf parameter type
 19 * @pins The pin range this config struct covers, [low, high]
 20 * @reg The register housing the configuration bits
 21 * @mask The mask to select the bits of interest in @reg
 22 */
 23struct aspeed_pin_config {
 24	enum pin_config_param param;
 25	unsigned int pins[2];
 26	unsigned int reg;
 27	u32 mask;
 28};
 29
 30#define ASPEED_PINCTRL_PIN(name_) \
 31	[name_] = { \
 32		.number = name_, \
 33		.name = #name_, \
 34		.drv_data = (void *) &(PIN_SYM(name_)) \
 35	}
 36
 37#define ASPEED_SB_PINCONF(param_, pin0_, pin1_, reg_, bit_) { \
 38	.param = param_, \
 39	.pins = {pin0_, pin1_}, \
 40	.reg = reg_, \
 41	.mask = BIT_MASK(bit_) \
 42}
 43
 44#define ASPEED_PULL_DOWN_PINCONF(pin_, reg_, bit_) \
 45	ASPEED_SB_PINCONF(PIN_CONFIG_BIAS_PULL_DOWN, pin_, pin_, reg_, bit_), \
 46	ASPEED_SB_PINCONF(PIN_CONFIG_BIAS_DISABLE,   pin_, pin_, reg_, bit_)
 47
 48#define ASPEED_PULL_UP_PINCONF(pin_, reg_, bit_) \
 49	ASPEED_SB_PINCONF(PIN_CONFIG_BIAS_PULL_UP, pin_, pin_, reg_, bit_), \
 50	ASPEED_SB_PINCONF(PIN_CONFIG_BIAS_DISABLE, pin_, pin_, reg_, bit_)
 51/*
 52 * Aspeed pin configuration description.
 53 *
 54 * @param: pinconf configuration parameter
 55 * @arg: The supported argument for @param, or -1 if any value is supported
 56 * @val: The register value to write to configure @arg for @param
 57 * @mask: The bitfield mask for @val
 58 *
 59 * The map is to be used in conjunction with the configuration array supplied
 60 * by the driver implementation.
 61 */
 62struct aspeed_pin_config_map {
 63	enum pin_config_param param;
 64	s32 arg;
 65	u32 val;
 66	u32 mask;
 67};
 68
 69struct aspeed_pinctrl_data {
 70	struct regmap *scu;
 71
 72	const struct pinctrl_pin_desc *pins;
 73	const unsigned int npins;
 74
 75	const struct aspeed_pin_config *configs;
 76	const unsigned int nconfigs;
 77
 78	struct aspeed_pinmux_data pinmux;
 79
 80	const struct aspeed_pin_config_map *confmaps;
 81	const unsigned int nconfmaps;
 82};
 83
 84/* Aspeed pinctrl helpers */
 85int aspeed_pinctrl_get_groups_count(struct pinctrl_dev *pctldev);
 86const char *aspeed_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
 87		unsigned int group);
 88int aspeed_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
 89		unsigned int group, const unsigned int **pins,
 90		unsigned int *npins);
 91void aspeed_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
 92		struct seq_file *s, unsigned int offset);
 93int aspeed_pinmux_get_fn_count(struct pinctrl_dev *pctldev);
 94const char *aspeed_pinmux_get_fn_name(struct pinctrl_dev *pctldev,
 95		unsigned int function);
 96int aspeed_pinmux_get_fn_groups(struct pinctrl_dev *pctldev,
 97		unsigned int function, const char * const **groups,
 98		unsigned int * const num_groups);
 99int aspeed_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned int function,
100		unsigned int group);
101int aspeed_gpio_request_enable(struct pinctrl_dev *pctldev,
102		struct pinctrl_gpio_range *range,
103		unsigned int offset);
104int aspeed_pinctrl_probe(struct platform_device *pdev,
105		const struct pinctrl_desc *pdesc,
106		struct aspeed_pinctrl_data *pdata);
107int aspeed_pin_config_get(struct pinctrl_dev *pctldev, unsigned int offset,
108		unsigned long *config);
109int aspeed_pin_config_set(struct pinctrl_dev *pctldev, unsigned int offset,
110		unsigned long *configs, unsigned int num_configs);
111int aspeed_pin_config_group_get(struct pinctrl_dev *pctldev,
112		unsigned int selector,
113		unsigned long *config);
114int aspeed_pin_config_group_set(struct pinctrl_dev *pctldev,
115		unsigned int selector,
116		unsigned long *configs,
117		unsigned int num_configs);
118
119#endif /* PINCTRL_ASPEED */