// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2003-2015 Broadcom Corporation * All Rights Reserved */ #include <linux/gpio/driver.h> #include <linux/platform_device.h> #include <linux/module.h> #include <linux/irq.h> #include <linux/interrupt.h> #include <linux/irqchip/chained_irq.h> #include <linux/acpi.h> /* * XLP GPIO has multiple 32 bit registers for each feature where each register * controls 32 pins. So, pins up to 64 require 2 32-bit registers and up to 96 * require 3 32-bit registers for each feature. * Here we only define offset of the first register for each feature. Offset of * the registers for pins greater than 32 can be calculated as following(Use * GPIO_INT_STAT as example): * * offset = (gpio / XLP_GPIO_REGSZ) * 4; * reg_addr = addr + offset; * * where addr is base address of the that feature register and gpio is the pin. */ #define GPIO_9XX_BYTESWAP … #define GPIO_9XX_CTRL … #define GPIO_9XX_OUTPUT_EN … #define GPIO_9XX_PADDRV … /* * Only for 4 interrupt enable reg are defined for now, * total reg available are 12. */ #define GPIO_9XX_INT_EN00 … #define GPIO_9XX_INT_EN10 … #define GPIO_9XX_INT_EN20 … #define GPIO_9XX_INT_EN30 … #define GPIO_9XX_INT_POL … #define GPIO_9XX_INT_TYPE … #define GPIO_9XX_INT_STAT … /* Interrupt type register mask */ #define XLP_GPIO_IRQ_TYPE_LVL … #define XLP_GPIO_IRQ_TYPE_EDGE … /* Interrupt polarity register mask */ #define XLP_GPIO_IRQ_POL_HIGH … #define XLP_GPIO_IRQ_POL_LOW … #define XLP_GPIO_REGSZ … #define XLP_GPIO_IRQ_BASE … #define XLP_MAX_NR_GPIO … struct xlp_gpio_priv { … }; static int xlp_gpio_get_reg(void __iomem *addr, unsigned gpio) { … } static void xlp_gpio_set_reg(void __iomem *addr, unsigned gpio, int state) { … } static void xlp_gpio_irq_enable(struct irq_data *d) { … } static void xlp_gpio_irq_disable(struct irq_data *d) { … } static void xlp_gpio_irq_mask_ack(struct irq_data *d) { … } static void xlp_gpio_irq_unmask(struct irq_data *d) { … } static int xlp_gpio_set_irq_type(struct irq_data *d, unsigned int type) { … } static struct irq_chip xlp_gpio_irq_chip = …; static void xlp_gpio_generic_handler(struct irq_desc *desc) { … } static int xlp_gpio_dir_output(struct gpio_chip *gc, unsigned gpio, int state) { … } static int xlp_gpio_dir_input(struct gpio_chip *gc, unsigned gpio) { … } static int xlp_gpio_get(struct gpio_chip *gc, unsigned gpio) { … } static void xlp_gpio_set(struct gpio_chip *gc, unsigned gpio, int state) { … } static int xlp_gpio_probe(struct platform_device *pdev) { … } #ifdef CONFIG_ACPI static const struct acpi_device_id xlp_gpio_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, xlp_gpio_acpi_match); #endif static struct platform_driver xlp_gpio_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux