// SPDX-License-Identifier: GPL-2.0 /* * GPIO driver for AMD 8111 south bridges * * Copyright (c) 2012 Dmitry Eremin-Solenikov * * Based on the AMD RNG driver: * Copyright 2005 (c) MontaVista Software, Inc. * with the majority of the code coming from: * * Hardware driver for the Intel/AMD/VIA Random Number Generators (RNG) * (c) Copyright 2003 Red Hat Inc <[email protected]> * * derived from * * Hardware driver for the AMD 768 Random Number Generator (RNG) * (c) Copyright 2001 Red Hat Inc * * derived from * * Hardware driver for Intel i810 Random Number Generator (RNG) * Copyright 2000,2001 Jeff Garzik <[email protected]> * Copyright 2000,2001 Philipp Rumpf <[email protected]> */ #include <linux/ioport.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/gpio/driver.h> #include <linux/pci.h> #include <linux/spinlock.h> #define PMBASE_OFFSET … #define PMBASE_SIZE … #define AMD_REG_GPIO(i) … #define AMD_GPIO_LTCH_STS … #define AMD_GPIO_RTIN … #define AMD_GPIO_DEBOUNCE … #define AMD_GPIO_MODE_MASK … #define AMD_GPIO_MODE_IN … #define AMD_GPIO_MODE_OUT … /* Enable alternative (e.g. clkout, IRQ, etc) function of the pin */ #define AMD_GPIO_MODE_ALTFN … #define AMD_GPIO_X_MASK … #define AMD_GPIO_X_IN_ACTIVEHI … #define AMD_GPIO_X_IN_LATCH … #define AMD_GPIO_X_OUT_LOW … #define AMD_GPIO_X_OUT_HI … #define AMD_GPIO_X_OUT_CLK0 … #define AMD_GPIO_X_OUT_CLK1 … /* * Data for PCI driver interface * * This data only exists for exporting the supported * PCI ids via MODULE_DEVICE_TABLE. We do not actually * register a pci_driver, because someone else might one day * want to register another driver on the same PCI id. */ static const struct pci_device_id pci_tbl[] = …; MODULE_DEVICE_TABLE(pci, pci_tbl); struct amd_gpio { … }; static int amd_gpio_request(struct gpio_chip *chip, unsigned offset) { … } static void amd_gpio_free(struct gpio_chip *chip, unsigned offset) { … } static void amd_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { … } static int amd_gpio_get(struct gpio_chip *chip, unsigned offset) { … } static int amd_gpio_dirout(struct gpio_chip *chip, unsigned offset, int value) { … } static int amd_gpio_dirin(struct gpio_chip *chip, unsigned offset) { … } static struct amd_gpio gp = …; static int __init amd_gpio_init(void) { … } static void __exit amd_gpio_exit(void) { … } module_init(…) …; module_exit(amd_gpio_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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