mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-19 08:18:32 +07:00
88d5e520aa
this remove all reference to gpio_remove retval in all driver except pinctrl and gpio. the same thing is done for gpio and pinctrl in two different patches. Signed-off-by: Abdoulaye Berthe <berthe.ab@gmail.com> Acked-by: Michael Büsch <m@bues.ch> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Mauro Carvalho Chehab <m.chehab@samsung.com> Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
/*
|
|
* arch/sh/boards/mach-x3proto/gpio.c
|
|
*
|
|
* Renesas SH-X3 Prototype Baseboard GPIO Support.
|
|
*
|
|
* Copyright (C) 2010 - 2012 Paul Mundt
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/io.h>
|
|
#include <mach/ilsel.h>
|
|
#include <mach/hardware.h>
|
|
|
|
#define KEYCTLR 0xb81c0000
|
|
#define KEYOUTR 0xb81c0002
|
|
#define KEYDETR 0xb81c0004
|
|
|
|
static DEFINE_SPINLOCK(x3proto_gpio_lock);
|
|
static struct irq_domain *x3proto_irq_domain;
|
|
|
|
static int x3proto_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int data;
|
|
|
|
spin_lock_irqsave(&x3proto_gpio_lock, flags);
|
|
data = __raw_readw(KEYCTLR);
|
|
data |= (1 << gpio);
|
|
__raw_writew(data, KEYCTLR);
|
|
spin_unlock_irqrestore(&x3proto_gpio_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int x3proto_gpio_get(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
return !!(__raw_readw(KEYDETR) & (1 << gpio));
|
|
}
|
|
|
|
static int x3proto_gpio_to_irq(struct gpio_chip *chip, unsigned gpio)
|
|
{
|
|
int virq;
|
|
|
|
if (gpio < chip->ngpio)
|
|
virq = irq_create_mapping(x3proto_irq_domain, gpio);
|
|
else
|
|
virq = -ENXIO;
|
|
|
|
return virq;
|
|
}
|
|
|
|
static void x3proto_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
|
|
{
|
|
struct irq_data *data = irq_get_irq_data(irq);
|
|
struct irq_chip *chip = irq_data_get_irq_chip(data);
|
|
unsigned long mask;
|
|
int pin;
|
|
|
|
chip->irq_mask_ack(data);
|
|
|
|
mask = __raw_readw(KEYDETR);
|
|
for_each_set_bit(pin, &mask, NR_BASEBOARD_GPIOS)
|
|
generic_handle_irq(irq_linear_revmap(x3proto_irq_domain, pin));
|
|
|
|
chip->irq_unmask(data);
|
|
}
|
|
|
|
struct gpio_chip x3proto_gpio_chip = {
|
|
.label = "x3proto-gpio",
|
|
.direction_input = x3proto_gpio_direction_input,
|
|
.get = x3proto_gpio_get,
|
|
.to_irq = x3proto_gpio_to_irq,
|
|
.base = -1,
|
|
.ngpio = NR_BASEBOARD_GPIOS,
|
|
};
|
|
|
|
static int x3proto_gpio_irq_map(struct irq_domain *domain, unsigned int virq,
|
|
irq_hw_number_t hwirq)
|
|
{
|
|
irq_set_chip_and_handler_name(virq, &dummy_irq_chip, handle_simple_irq,
|
|
"gpio");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct irq_domain_ops x3proto_gpio_irq_ops = {
|
|
.map = x3proto_gpio_irq_map,
|
|
.xlate = irq_domain_xlate_twocell,
|
|
};
|
|
|
|
int __init x3proto_gpio_setup(void)
|
|
{
|
|
int ilsel, ret;
|
|
|
|
ilsel = ilsel_enable(ILSEL_KEY);
|
|
if (unlikely(ilsel < 0))
|
|
return ilsel;
|
|
|
|
ret = gpiochip_add(&x3proto_gpio_chip);
|
|
if (unlikely(ret))
|
|
goto err_gpio;
|
|
|
|
x3proto_irq_domain = irq_domain_add_linear(NULL, NR_BASEBOARD_GPIOS,
|
|
&x3proto_gpio_irq_ops, NULL);
|
|
if (unlikely(!x3proto_irq_domain))
|
|
goto err_irq;
|
|
|
|
pr_info("registering '%s' support, handling GPIOs %u -> %u, "
|
|
"bound to IRQ %u\n",
|
|
x3proto_gpio_chip.label, x3proto_gpio_chip.base,
|
|
x3proto_gpio_chip.base + x3proto_gpio_chip.ngpio,
|
|
ilsel);
|
|
|
|
irq_set_chained_handler(ilsel, x3proto_gpio_irq_handler);
|
|
irq_set_irq_wake(ilsel, 1);
|
|
|
|
return 0;
|
|
|
|
err_irq:
|
|
gpiochip_remove(&x3proto_gpio_chip);
|
|
ret = 0;
|
|
err_gpio:
|
|
synchronize_irq(ilsel);
|
|
|
|
ilsel_disable(ILSEL_KEY);
|
|
|
|
return ret;
|
|
}
|