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![Thomas Gleixner](/assets/img/avatar_default.png)
Most interrupt flow handlers do not use the irq argument. Those few which use it can retrieve the irq number from the irq descriptor. Remove the argument. Search and replace was done with coccinelle and some extra helper scripts around it. Thanks to Julia for her help! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Jiang Liu <jiang.liu@linux.intel.com>
266 lines
5.8 KiB
C
266 lines
5.8 KiB
C
/*
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* linux/arch/arm/mach-sa1100/gpio.c
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*
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* Generic SA-1100 GPIO handling
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/io.h>
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#include <linux/syscore_ops.h>
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#include <mach/hardware.h>
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#include <mach/irqs.h>
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static int sa1100_gpio_get(struct gpio_chip *chip, unsigned offset)
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{
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return GPLR & GPIO_GPIO(offset);
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}
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static void sa1100_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
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{
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if (value)
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GPSR = GPIO_GPIO(offset);
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else
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GPCR = GPIO_GPIO(offset);
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}
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static int sa1100_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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unsigned long flags;
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local_irq_save(flags);
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GPDR &= ~GPIO_GPIO(offset);
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local_irq_restore(flags);
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return 0;
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}
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static int sa1100_direction_output(struct gpio_chip *chip, unsigned offset, int value)
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{
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unsigned long flags;
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local_irq_save(flags);
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sa1100_gpio_set(chip, offset, value);
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GPDR |= GPIO_GPIO(offset);
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local_irq_restore(flags);
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return 0;
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}
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static int sa1100_to_irq(struct gpio_chip *chip, unsigned offset)
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{
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return IRQ_GPIO0 + offset;
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}
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static struct gpio_chip sa1100_gpio_chip = {
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.label = "gpio",
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.direction_input = sa1100_direction_input,
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.direction_output = sa1100_direction_output,
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.set = sa1100_gpio_set,
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.get = sa1100_gpio_get,
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.to_irq = sa1100_to_irq,
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.base = 0,
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.ngpio = GPIO_MAX + 1,
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};
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/*
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* SA1100 GPIO edge detection for IRQs:
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* IRQs are generated on Falling-Edge, Rising-Edge, or both.
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* Use this instead of directly setting GRER/GFER.
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*/
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static int GPIO_IRQ_rising_edge;
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static int GPIO_IRQ_falling_edge;
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static int GPIO_IRQ_mask;
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static int sa1100_gpio_type(struct irq_data *d, unsigned int type)
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{
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unsigned int mask;
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mask = BIT(d->hwirq);
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if (type == IRQ_TYPE_PROBE) {
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if ((GPIO_IRQ_rising_edge | GPIO_IRQ_falling_edge) & mask)
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return 0;
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type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
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}
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if (type & IRQ_TYPE_EDGE_RISING)
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GPIO_IRQ_rising_edge |= mask;
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else
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GPIO_IRQ_rising_edge &= ~mask;
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if (type & IRQ_TYPE_EDGE_FALLING)
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GPIO_IRQ_falling_edge |= mask;
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else
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GPIO_IRQ_falling_edge &= ~mask;
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GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask;
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GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask;
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return 0;
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}
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/*
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* GPIO IRQs must be acknowledged.
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*/
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static void sa1100_gpio_ack(struct irq_data *d)
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{
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GEDR = BIT(d->hwirq);
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}
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static void sa1100_gpio_mask(struct irq_data *d)
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{
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unsigned int mask = BIT(d->hwirq);
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GPIO_IRQ_mask &= ~mask;
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GRER &= ~mask;
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GFER &= ~mask;
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}
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static void sa1100_gpio_unmask(struct irq_data *d)
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{
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unsigned int mask = BIT(d->hwirq);
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GPIO_IRQ_mask |= mask;
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GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask;
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GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask;
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}
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static int sa1100_gpio_wake(struct irq_data *d, unsigned int on)
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{
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if (on)
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PWER |= BIT(d->hwirq);
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else
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PWER &= ~BIT(d->hwirq);
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return 0;
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}
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/*
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* This is for GPIO IRQs
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*/
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static struct irq_chip sa1100_gpio_irq_chip = {
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.name = "GPIO",
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.irq_ack = sa1100_gpio_ack,
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.irq_mask = sa1100_gpio_mask,
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.irq_unmask = sa1100_gpio_unmask,
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.irq_set_type = sa1100_gpio_type,
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.irq_set_wake = sa1100_gpio_wake,
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};
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static int sa1100_gpio_irqdomain_map(struct irq_domain *d,
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unsigned int irq, irq_hw_number_t hwirq)
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{
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irq_set_chip_and_handler(irq, &sa1100_gpio_irq_chip,
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handle_edge_irq);
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irq_set_noprobe(irq);
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return 0;
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}
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static const struct irq_domain_ops sa1100_gpio_irqdomain_ops = {
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.map = sa1100_gpio_irqdomain_map,
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.xlate = irq_domain_xlate_onetwocell,
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};
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static struct irq_domain *sa1100_gpio_irqdomain;
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/*
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* IRQ 0-11 (GPIO) handler. We enter here with the
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* irq_controller_lock held, and IRQs disabled. Decode the IRQ
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* and call the handler.
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*/
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static void sa1100_gpio_handler(struct irq_desc *desc)
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{
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unsigned int irq, mask;
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mask = GEDR;
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do {
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/*
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* clear down all currently active IRQ sources.
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* We will be processing them all.
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*/
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GEDR = mask;
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irq = IRQ_GPIO0;
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do {
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if (mask & 1)
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generic_handle_irq(irq);
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mask >>= 1;
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irq++;
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} while (mask);
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mask = GEDR;
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} while (mask);
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}
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static int sa1100_gpio_suspend(void)
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{
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/*
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* Set the appropriate edges for wakeup.
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*/
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GRER = PWER & GPIO_IRQ_rising_edge;
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GFER = PWER & GPIO_IRQ_falling_edge;
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/*
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* Clear any pending GPIO interrupts.
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*/
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GEDR = GEDR;
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return 0;
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}
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static void sa1100_gpio_resume(void)
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{
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GRER = GPIO_IRQ_rising_edge & GPIO_IRQ_mask;
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GFER = GPIO_IRQ_falling_edge & GPIO_IRQ_mask;
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}
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static struct syscore_ops sa1100_gpio_syscore_ops = {
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.suspend = sa1100_gpio_suspend,
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.resume = sa1100_gpio_resume,
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};
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static int __init sa1100_gpio_init_devicefs(void)
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{
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register_syscore_ops(&sa1100_gpio_syscore_ops);
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return 0;
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}
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device_initcall(sa1100_gpio_init_devicefs);
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void __init sa1100_init_gpio(void)
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{
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/* clear all GPIO edge detects */
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GFER = 0;
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GRER = 0;
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GEDR = -1;
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gpiochip_add(&sa1100_gpio_chip);
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sa1100_gpio_irqdomain = irq_domain_add_simple(NULL,
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28, IRQ_GPIO0,
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&sa1100_gpio_irqdomain_ops, NULL);
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/*
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* Install handlers for GPIO 0-10 edge detect interrupts
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*/
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irq_set_chained_handler(IRQ_GPIO0_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO1_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO2_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO3_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO4_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO5_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO6_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO7_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO8_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO9_SC, sa1100_gpio_handler);
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irq_set_chained_handler(IRQ_GPIO10_SC, sa1100_gpio_handler);
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/*
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* Install handler for GPIO 11-27 edge detect interrupts
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*/
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irq_set_chained_handler(IRQ_GPIO11_27, sa1100_gpio_handler);
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}
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