mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 05:40:53 +07:00
8783dd3a37
LTO patches add __visible to the asmlinkage define, causing compilation warnings like: drivers/irqchip/irq-gic.c:283:1: warning: 'externally_visible' attribute have effect only on public objects [-Wattributes] Drop asmlinkage here to avoid such warnings. Reported-by: Olof's autobuilder <build@lixom.net> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: linux-arm-kernel@lists.infradead.org Cc: khilman@linaro.org Cc: Russell King <linux@arm.linux.org.uk> Cc: Josh Cartwright <joshc@codeaurora.org> Cc: Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1393980030-17770-1-git-send-email-sboyd@codeaurora.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
/*
|
|
* MOXA ART SoCs IRQ chip driver.
|
|
*
|
|
* Copyright (C) 2013 Jonas Jensen
|
|
*
|
|
* Jonas Jensen <jonas.jensen@gmail.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/irqdomain.h>
|
|
|
|
#include <asm/exception.h>
|
|
|
|
#include "irqchip.h"
|
|
|
|
#define IRQ_SOURCE_REG 0
|
|
#define IRQ_MASK_REG 0x04
|
|
#define IRQ_CLEAR_REG 0x08
|
|
#define IRQ_MODE_REG 0x0c
|
|
#define IRQ_LEVEL_REG 0x10
|
|
#define IRQ_STATUS_REG 0x14
|
|
|
|
#define FIQ_SOURCE_REG 0x20
|
|
#define FIQ_MASK_REG 0x24
|
|
#define FIQ_CLEAR_REG 0x28
|
|
#define FIQ_MODE_REG 0x2c
|
|
#define FIQ_LEVEL_REG 0x30
|
|
#define FIQ_STATUS_REG 0x34
|
|
|
|
|
|
struct moxart_irq_data {
|
|
void __iomem *base;
|
|
struct irq_domain *domain;
|
|
unsigned int interrupt_mask;
|
|
};
|
|
|
|
static struct moxart_irq_data intc;
|
|
|
|
static void __exception_irq_entry handle_irq(struct pt_regs *regs)
|
|
{
|
|
u32 irqstat;
|
|
int hwirq;
|
|
|
|
irqstat = readl(intc.base + IRQ_STATUS_REG);
|
|
|
|
while (irqstat) {
|
|
hwirq = ffs(irqstat) - 1;
|
|
handle_IRQ(irq_linear_revmap(intc.domain, hwirq), regs);
|
|
irqstat &= ~(1 << hwirq);
|
|
}
|
|
}
|
|
|
|
static int __init moxart_of_intc_init(struct device_node *node,
|
|
struct device_node *parent)
|
|
{
|
|
unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
|
|
int ret;
|
|
struct irq_chip_generic *gc;
|
|
|
|
intc.base = of_iomap(node, 0);
|
|
if (!intc.base) {
|
|
pr_err("%s: unable to map IC registers\n",
|
|
node->full_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
intc.domain = irq_domain_add_linear(node, 32, &irq_generic_chip_ops,
|
|
intc.base);
|
|
if (!intc.domain) {
|
|
pr_err("%s: unable to create IRQ domain\n", node->full_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = irq_alloc_domain_generic_chips(intc.domain, 32, 1,
|
|
"MOXARTINTC", handle_edge_irq,
|
|
clr, 0, IRQ_GC_INIT_MASK_CACHE);
|
|
if (ret) {
|
|
pr_err("%s: could not allocate generic chip\n",
|
|
node->full_name);
|
|
irq_domain_remove(intc.domain);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = of_property_read_u32(node, "interrupt-mask",
|
|
&intc.interrupt_mask);
|
|
if (ret)
|
|
pr_err("%s: could not read interrupt-mask DT property\n",
|
|
node->full_name);
|
|
|
|
gc = irq_get_domain_generic_chip(intc.domain, 0);
|
|
|
|
gc->reg_base = intc.base;
|
|
gc->chip_types[0].regs.mask = IRQ_MASK_REG;
|
|
gc->chip_types[0].regs.ack = IRQ_CLEAR_REG;
|
|
gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
|
|
gc->chip_types[0].chip.irq_mask = irq_gc_mask_clr_bit;
|
|
gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit;
|
|
|
|
writel(0, intc.base + IRQ_MASK_REG);
|
|
writel(0xffffffff, intc.base + IRQ_CLEAR_REG);
|
|
|
|
writel(intc.interrupt_mask, intc.base + IRQ_MODE_REG);
|
|
writel(intc.interrupt_mask, intc.base + IRQ_LEVEL_REG);
|
|
|
|
set_handle_irq(handle_irq);
|
|
|
|
return 0;
|
|
}
|
|
IRQCHIP_DECLARE(moxa_moxart_ic, "moxa,moxart-ic", moxart_of_intc_init);
|