drivers/pinctrl/cirrus/pinctrl-cs47l15.c

Source file repositories/reference/linux-study-clean/drivers/pinctrl/cirrus/pinctrl-cs47l15.c

File Facts

System
Linux kernel
Corpus path
drivers/pinctrl/cirrus/pinctrl-cs47l15.c
Extension
.c
Size
1439 bytes
Lines
41
Domain
Driver Families
Bucket
drivers/pinctrl
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Pinctrl for Cirrus Logic CS47L15
 *
 * Copyright (C) 2018-2019 Cirrus Logic, Inc. and
 *                         Cirrus Logic International Semiconductor Ltd.
 */

#include <linux/err.h>
#include <linux/mfd/madera/core.h>

#include "pinctrl-madera.h"

/*
 * The alt func groups are the most commonly used functions we place these at
 * the lower function indexes for convenience, and the less commonly used gpio
 * functions at higher indexes.
 *
 * To stay consistent with the datasheet the function names are the same as
 * the group names for that function's pins
 *
 * Note - all 1 less than in datasheet because these are zero-indexed
 */
static const unsigned int cs47l15_aif1_pins[] = { 0, 1, 2, 3 };
static const unsigned int cs47l15_aif2_pins[] = { 4, 5, 6, 7 };
static const unsigned int cs47l15_aif3_pins[] = { 8, 9, 10, 11 };
static const unsigned int cs47l15_spk1_pins[] = { 12, 13, 14 };

static const struct madera_pin_groups cs47l15_pin_groups[] = {
	{ "aif1", cs47l15_aif1_pins, ARRAY_SIZE(cs47l15_aif1_pins) },
	{ "aif2", cs47l15_aif2_pins, ARRAY_SIZE(cs47l15_aif2_pins) },
	{ "aif3", cs47l15_aif3_pins, ARRAY_SIZE(cs47l15_aif3_pins) },
	{ "pdmspk1", cs47l15_spk1_pins, ARRAY_SIZE(cs47l15_spk1_pins) },
};

const struct madera_pin_chip cs47l15_pin_chip = {
	.n_pins = CS47L15_NUM_GPIOS,
	.pin_groups = cs47l15_pin_groups,
	.n_pin_groups = ARRAY_SIZE(cs47l15_pin_groups),
};

Annotation

Implementation Notes