forked from luck/tmp_suning_uos_patched
d17cab4451
set_irq_flags is ARM specific with custom flags which have genirq equivalents. Convert drivers to use the genirq interfaces directly, so we can kill off set_irq_flags. The translation of flags is as follows: IRQF_VALID -> !IRQ_NOREQUEST IRQF_PROBE -> !IRQ_NOPROBE IRQF_NOAUTOEN -> IRQ_NOAUTOEN For IRQs managed by an irqdomain, the irqdomain core code handles clearing and setting IRQ_NOREQUEST already, so there is no need to do this in .map() functions and we can simply remove the set_irq_flags calls. Some users also modify IRQ_NOPROBE and this has been maintained although it is not clear that is really needed. There appears to be a great deal of blind copy and paste of this code. Signed-off-by: Rob Herring <robh@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Cc: Russell King <linux@arm.linux.org.uk> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Lee Jones <lee@kernel.org> Cc: Alexander Shiyan <shc_work@mail.ru> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: linux-rpi-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Link: http://lkml.kernel.org/r/1440889285-5637-3-git-send-email-robh@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
/*
|
|
* Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/stmp_device.h>
|
|
#include <asm/exception.h>
|
|
|
|
#define HW_ICOLL_VECTOR 0x0000
|
|
#define HW_ICOLL_LEVELACK 0x0010
|
|
#define HW_ICOLL_CTRL 0x0020
|
|
#define HW_ICOLL_STAT_OFFSET 0x0070
|
|
#define HW_ICOLL_INTERRUPTn_SET(n) (0x0124 + (n) * 0x10)
|
|
#define HW_ICOLL_INTERRUPTn_CLR(n) (0x0128 + (n) * 0x10)
|
|
#define BM_ICOLL_INTERRUPTn_ENABLE 0x00000004
|
|
#define BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 0x1
|
|
|
|
#define ICOLL_NUM_IRQS 128
|
|
|
|
static void __iomem *icoll_base;
|
|
static struct irq_domain *icoll_domain;
|
|
|
|
static void icoll_ack_irq(struct irq_data *d)
|
|
{
|
|
/*
|
|
* The Interrupt Collector is able to prioritize irqs.
|
|
* Currently only level 0 is used. So acking can use
|
|
* BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0 unconditionally.
|
|
*/
|
|
__raw_writel(BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0,
|
|
icoll_base + HW_ICOLL_LEVELACK);
|
|
}
|
|
|
|
static void icoll_mask_irq(struct irq_data *d)
|
|
{
|
|
__raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
|
|
icoll_base + HW_ICOLL_INTERRUPTn_CLR(d->hwirq));
|
|
}
|
|
|
|
static void icoll_unmask_irq(struct irq_data *d)
|
|
{
|
|
__raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
|
|
icoll_base + HW_ICOLL_INTERRUPTn_SET(d->hwirq));
|
|
}
|
|
|
|
static struct irq_chip mxs_icoll_chip = {
|
|
.irq_ack = icoll_ack_irq,
|
|
.irq_mask = icoll_mask_irq,
|
|
.irq_unmask = icoll_unmask_irq,
|
|
};
|
|
|
|
asmlinkage void __exception_irq_entry icoll_handle_irq(struct pt_regs *regs)
|
|
{
|
|
u32 irqnr;
|
|
|
|
irqnr = __raw_readl(icoll_base + HW_ICOLL_STAT_OFFSET);
|
|
__raw_writel(irqnr, icoll_base + HW_ICOLL_VECTOR);
|
|
handle_domain_irq(icoll_domain, irqnr, regs);
|
|
}
|
|
|
|
static int icoll_irq_domain_map(struct irq_domain *d, unsigned int virq,
|
|
irq_hw_number_t hw)
|
|
{
|
|
irq_set_chip_and_handler(virq, &mxs_icoll_chip, handle_level_irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct irq_domain_ops icoll_irq_domain_ops = {
|
|
.map = icoll_irq_domain_map,
|
|
.xlate = irq_domain_xlate_onecell,
|
|
};
|
|
|
|
static int __init icoll_of_init(struct device_node *np,
|
|
struct device_node *interrupt_parent)
|
|
{
|
|
icoll_base = of_iomap(np, 0);
|
|
WARN_ON(!icoll_base);
|
|
|
|
/*
|
|
* Interrupt Collector reset, which initializes the priority
|
|
* for each irq to level 0.
|
|
*/
|
|
stmp_reset_block(icoll_base + HW_ICOLL_CTRL);
|
|
|
|
icoll_domain = irq_domain_add_linear(np, ICOLL_NUM_IRQS,
|
|
&icoll_irq_domain_ops, NULL);
|
|
return icoll_domain ? 0 : -ENODEV;
|
|
}
|
|
IRQCHIP_DECLARE(mxs, "fsl,icoll", icoll_of_init);
|