pinctrl-lpass-lpi.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
  4 * Copyright (c) 2020 Linaro Ltd.
  5 */
  6#ifndef __PINCTRL_LPASS_LPI_H__
  7#define __PINCTRL_LPASS_LPI_H__
  8
  9#include <linux/array_size.h>
 10#include <linux/bits.h>
 11
 12#include "../core.h"
 13
 14struct platform_device;
 15
 16struct pinctrl_pin_desc;
 17
 18#define LPI_SLEW_RATE_CTL_REG	0xa000
 19#define LPI_TLMM_REG_OFFSET		0x1000
 20#define LPI_SLEW_RATE_MAX		0x03
 21#define LPI_SLEW_BITS_SIZE		0x02
 22#define LPI_SLEW_RATE_MASK		GENMASK(1, 0)
 23#define LPI_GPIO_CFG_REG		0x00
 24#define LPI_GPIO_PULL_MASK		GENMASK(1, 0)
 25#define LPI_GPIO_FUNCTION_MASK		GENMASK(5, 2)
 26#define LPI_GPIO_OUT_STRENGTH_MASK	GENMASK(8, 6)
 27#define LPI_GPIO_OE_MASK		BIT(9)
 28#define LPI_GPIO_VALUE_REG		0x04
 29#define LPI_GPIO_VALUE_IN_MASK		BIT(0)
 30#define LPI_GPIO_VALUE_OUT_MASK		BIT(1)
 31
 32#define LPI_GPIO_BIAS_DISABLE		0x0
 33#define LPI_GPIO_PULL_DOWN		0x1
 34#define LPI_GPIO_KEEPER			0x2
 35#define LPI_GPIO_PULL_UP		0x3
 36#define LPI_GPIO_DS_TO_VAL(v)		(v / 2 - 1)
 37#define LPI_NO_SLEW				-1
 38
 39#define LPI_FUNCTION(fname)			                \
 40	[LPI_MUX_##fname] = {		                \
 41		.name = #fname,				\
 42		.groups = fname##_groups,               \
 43		.ngroups = ARRAY_SIZE(fname##_groups),	\
 44	}
 45
 46#define LPI_PINGROUP(id, soff, f1, f2, f3, f4)		\
 47	{						\
 48		.pin = id,				\
 49		.slew_offset = soff,			\
 50		.funcs = (int[]){			\
 51			LPI_MUX_gpio,			\
 52			LPI_MUX_##f1,			\
 53			LPI_MUX_##f2,			\
 54			LPI_MUX_##f3,			\
 55			LPI_MUX_##f4,			\
 56		},					\
 57		.nfuncs = 5,				\
 58		.pin_offset = 0,			\
 59	}
 60
 61#define LPI_PINGROUP_OFFSET(id, soff, f1, f2, f3, f4, poff)	\
 62	{							\
 63		.pin = id,					\
 64		.slew_offset = soff,				\
 65		.funcs = (int[]){				\
 66			LPI_MUX_gpio,				\
 67			LPI_MUX_##f1,				\
 68			LPI_MUX_##f2,				\
 69			LPI_MUX_##f3,				\
 70			LPI_MUX_##f4,				\
 71		},						\
 72		.nfuncs = 5,					\
 73		.pin_offset = poff,				\
 74	}
 75
 76/*
 77 * Slew rate control is done in the same register as rest of the
 78 * pin configuration.
 79 */
 80#define LPI_FLAG_SLEW_RATE_SAME_REG			BIT(0)
 81#define LPI_FLAG_USE_PREDEFINED_PIN_OFFSET		BIT(1)
 82
 83struct lpi_pingroup {
 84	unsigned int pin;
 85	/* Bit offset in slew register for SoundWire pins only */
 86	int slew_offset;
 87	unsigned int *funcs;
 88	unsigned int nfuncs;
 89	unsigned int pin_offset;
 90};
 91
 92struct lpi_function {
 93	const char *name;
 94	const char * const *groups;
 95	unsigned int ngroups;
 96};
 97
 98struct lpi_pinctrl_variant_data {
 99	const struct pinctrl_pin_desc *pins;
100	int npins;
101	const struct lpi_pingroup *groups;
102	int ngroups;
103	const struct lpi_function *functions;
104	int nfunctions;
105	unsigned int flags;
106};
107
108int lpi_pinctrl_probe(struct platform_device *pdev);
109void lpi_pinctrl_remove(struct platform_device *pdev);
110
111#endif /*__PINCTRL_LPASS_LPI_H__*/