diff options
Diffstat (limited to 'drivers/gpio/gpio-lynxpoint.c')
| -rw-r--r-- | drivers/gpio/gpio-lynxpoint.c | 44 |
1 files changed, 16 insertions, 28 deletions
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index ca12d9f96914..31b4a091ab60 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -1,36 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0 /* * GPIO controller driver for Intel Lynxpoint PCH chipset> * Copyright (c) 2012, Intel Corporation. * * Author: Mathias Nyman <mathias.nyman@linux.intel.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> +#include <linux/acpi.h> #include <linux/bitops.h> -#include <linux/interrupt.h> #include <linux/gpio/driver.h> -#include <linux/slab.h> -#include <linux/acpi.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> -#include <linux/io.h> +#include <linux/slab.h> +#include <linux/types.h> /* LynxPoint chipset has support for 94 gpio pins */ @@ -240,21 +226,23 @@ static void lp_gpio_irq_handler(struct irq_desc *desc) struct gpio_chip *gc = irq_desc_get_handler_data(desc); struct lp_gpio *lg = gpiochip_get_data(gc); struct irq_chip *chip = irq_data_get_irq_chip(data); - u32 base, pin, mask; unsigned long reg, ena, pending; + u32 base, pin; /* check from GPIO controller which pin triggered the interrupt */ for (base = 0; base < lg->chip.ngpio; base += 32) { reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT); ena = lp_gpio_reg(&lg->chip, base, LP_INT_ENABLE); - while ((pending = (inl(reg) & inl(ena)))) { + /* Only interrupts that are enabled */ + pending = inl(reg) & inl(ena); + + for_each_set_bit(pin, &pending, 32) { unsigned irq; - pin = __ffs(pending); - mask = BIT(pin); /* Clear before handling so we don't lose an edge */ - outl(mask, reg); + outl(BIT(pin), reg); + irq = irq_find_mapping(lg->chip.irq.domain, base + pin); generic_handle_irq(irq); } @@ -466,5 +454,5 @@ module_exit(lp_gpio_exit); MODULE_AUTHOR("Mathias Nyman (Intel)"); MODULE_DESCRIPTION("GPIO interface for Intel Lynxpoint"); -MODULE_LICENSE("GPL"); +MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:lp_gpio"); |