linux/drivers/pinctrl/qcom/pinctrl-qdf2xxx.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
 *
 * GPIO and pin control functions on this SOC are handled by the "TLMM"
 * device.  The driver which controls this device is pinctrl-msm.c.  Each
 * SOC with a TLMM is expected to create a client driver that registers
 * with pinctrl-msm.c.  This means that all TLMM drivers are pin control
 * drivers.
 *
 * This pin control driver is intended to be used only an ACPI-enabled
 * system.  As such, UEFI will handle all pin control configuration, so
 * this driver does not provide pin control functions.  It is effectively
 * a GPIO-only driver.  The alternative is to duplicate the GPIO code of
 * pinctrl-msm.c into another driver.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/acpi.h>

#include "pinctrl-msm.h"

/* A maximum of 256 allows us to use a u8 array to hold the GPIO numbers */
#define MAX_GPIOS …

/* maximum size of each gpio name (enough room for "gpioXXX" + null) */
#define NAME_SIZE …

static int qdf2xxx_pinctrl_probe(struct platform_device *pdev)
{ … }

static const struct acpi_device_id qdf2xxx_acpi_ids[] = …;
MODULE_DEVICE_TABLE(acpi, qdf2xxx_acpi_ids);

static struct platform_driver qdf2xxx_pinctrl_driver = …;

static int __init qdf2xxx_pinctrl_init(void)
{ … }
arch_initcall(qdf2xxx_pinctrl_init);

static void __exit qdf2xxx_pinctrl_exit(void)
{ … }
module_exit(qdf2xxx_pinctrl_exit);

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;