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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-01 18:35:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-01 18:35:58 -0700
commit84be4ae2c038e2b03d650cbf2a7cfd9e8d6e9e51 (patch)
tree06f806cdc8bded9ae81c963287beb73a6e961d4b /arch/arm/mach-mxs
parentac9e7ab32fe42489808c8d9fc89ad413d2805766 (diff)
parent36246a820075b65907112891b77ff7915fdb06a5 (diff)
downloadop-kernel-dev-84be4ae2c038e2b03d650cbf2a7cfd9e8d6e9e51.zip
op-kernel-dev-84be4ae2c038e2b03d650cbf2a7cfd9e8d6e9e51.tar.gz
Merge tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM soc-specific updates, take 2 from Olof Johansson: "This branch converts the MXS Freescale platform to use irqdomains and sparse IRQ, in preparation for DT probing and multiplatform kernels." * tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: mxs: remove mach/irqs.h ARM: mxs: select SPARSE_IRQ ARM: mxs: adopt irq_domain support for icoll driver ARM: mxs: select MULTI_IRQ_HANDLER ARM: mxs: retrieve timer irq from device tree gpio/mxs: adopt irq_domain support for mxs gpio driver
Diffstat (limited to 'arch/arm/mach-mxs')
-rw-r--r--arch/arm/mach-mxs/icoll.c63
-rw-r--r--arch/arm/mach-mxs/include/mach/common.h3
-rw-r--r--arch/arm/mach-mxs/include/mach/entry-macro.S35
-rw-r--r--arch/arm/mach-mxs/include/mach/irqs.h32
-rw-r--r--arch/arm/mach-mxs/mach-mxs.c39
-rw-r--r--arch/arm/mach-mxs/timer.c13
6 files changed, 72 insertions, 113 deletions
diff --git a/arch/arm/mach-mxs/icoll.c b/arch/arm/mach-mxs/icoll.c
index 23ca9d0..8fb23af 100644
--- a/arch/arm/mach-mxs/icoll.c
+++ b/arch/arm/mach-mxs/icoll.c
@@ -19,20 +19,27 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
+#include <linux/irqdomain.h>
#include <linux/io.h>
-
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <asm/exception.h>
#include <mach/mxs.h>
#include <mach/common.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 = MXS_IO_ADDRESS(MXS_ICOLL_BASE_ADDR);
+static struct irq_domain *icoll_domain;
static void icoll_ack_irq(struct irq_data *d)
{
@@ -48,13 +55,13 @@ static void icoll_ack_irq(struct irq_data *d)
static void icoll_mask_irq(struct irq_data *d)
{
__raw_writel(BM_ICOLL_INTERRUPTn_ENABLE,
- icoll_base + HW_ICOLL_INTERRUPTn_CLR(d->irq));
+ 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->irq));
+ icoll_base + HW_ICOLL_INTERRUPTn_SET(d->hwirq));
}
static struct irq_chip mxs_icoll_chip = {
@@ -63,18 +70,56 @@ static struct irq_chip mxs_icoll_chip = {
.irq_unmask = icoll_unmask_irq,
};
-void __init icoll_init_irq(void)
+asmlinkage void __exception_irq_entry icoll_handle_irq(struct pt_regs *regs)
{
- int i;
+ u32 irqnr;
+
+ do {
+ irqnr = __raw_readl(icoll_base + HW_ICOLL_STAT_OFFSET);
+ if (irqnr != 0x7f) {
+ __raw_writel(irqnr, icoll_base + HW_ICOLL_VECTOR);
+ irqnr = irq_find_mapping(icoll_domain, irqnr);
+ handle_IRQ(irqnr, regs);
+ continue;
+ }
+ break;
+ } while (1);
+}
+
+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);
+ set_irq_flags(virq, IRQF_VALID);
+
+ return 0;
+}
+static struct irq_domain_ops icoll_irq_domain_ops = {
+ .map = icoll_irq_domain_map,
+ .xlate = irq_domain_xlate_onecell,
+};
+
+void __init icoll_of_init(struct device_node *np,
+ struct device_node *interrupt_parent)
+{
/*
* Interrupt Collector reset, which initializes the priority
* for each irq to level 0.
*/
mxs_reset_block(icoll_base + HW_ICOLL_CTRL);
- for (i = 0; i < MXS_INTERNAL_IRQS; i++) {
- irq_set_chip_and_handler(i, &mxs_icoll_chip, handle_level_irq);
- set_irq_flags(i, IRQF_VALID);
- }
+ icoll_domain = irq_domain_add_linear(np, ICOLL_NUM_IRQS,
+ &icoll_irq_domain_ops, NULL);
+ WARN_ON(!icoll_domain);
+}
+
+static const struct of_device_id icoll_of_match[] __initconst = {
+ {.compatible = "fsl,icoll", .data = icoll_of_init},
+ { /* sentinel */ }
+};
+
+void __init icoll_init_irq(void)
+{
+ of_irq_init(icoll_of_match);
}
diff --git a/arch/arm/mach-mxs/include/mach/common.h b/arch/arm/mach-mxs/include/mach/common.h
index 4dec795..be5a9c9 100644
--- a/arch/arm/mach-mxs/include/mach/common.h
+++ b/arch/arm/mach-mxs/include/mach/common.h
@@ -13,7 +13,7 @@
extern const u32 *mxs_get_ocotp(void);
extern int mxs_reset_block(void __iomem *);
-extern void mxs_timer_init(int);
+extern void mxs_timer_init(void);
extern void mxs_restart(char, const char *);
extern int mxs_saif_clkmux_select(unsigned int clkmux);
@@ -24,5 +24,6 @@ extern int mx28_clocks_init(void);
extern void mx28_map_io(void);
extern void icoll_init_irq(void);
+extern void icoll_handle_irq(struct pt_regs *);
#endif /* __MACH_MXS_COMMON_H__ */
diff --git a/arch/arm/mach-mxs/include/mach/entry-macro.S b/arch/arm/mach-mxs/include/mach/entry-macro.S
deleted file mode 100644
index 0c14259..0000000
--- a/arch/arm/mach-mxs/include/mach/entry-macro.S
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Low-level IRQ helper macros for Freescale MXS-based
- *
- * 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 <mach/mxs.h>
-
-#define MXS_ICOLL_VBASE MXS_IO_ADDRESS(MXS_ICOLL_BASE_ADDR)
-#define HW_ICOLL_STAT_OFFSET 0x70
-
- .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
- ldr \irqnr, [\base, #HW_ICOLL_STAT_OFFSET]
- cmp \irqnr, #0x7F
- strne \irqnr, [\base]
- moveqs \irqnr, #0
- .endm
-
- .macro get_irqnr_preamble, base, tmp
- ldr \base, =MXS_ICOLL_VBASE
- .endm
diff --git a/arch/arm/mach-mxs/include/mach/irqs.h b/arch/arm/mach-mxs/include/mach/irqs.h
deleted file mode 100644
index f771039..0000000
--- a/arch/arm/mach-mxs/include/mach/irqs.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright 2004-2007 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 version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __MACH_MXS_IRQS_H__
-#define __MACH_MXS_IRQS_H__
-
-#define MXS_INTERNAL_IRQS 128
-
-#define MXS_GPIO_IRQ_START MXS_INTERNAL_IRQS
-
-/* the maximum for MXS-based */
-#define MXS_GPIO_IRQS (32 * 5)
-
-/*
- * The next 16 interrupts are for board specific purposes. Since
- * the kernel can only run on one machine at a time, we can re-use
- * these. If you need more, increase MXS_BOARD_IRQS, but keep it
- * within sensible limits.
- */
-#define MXS_BOARD_IRQ_START (MXS_GPIO_IRQ_START + MXS_GPIO_IRQS)
-#define MXS_BOARD_IRQS 16
-
-#define NR_IRQS (MXS_BOARD_IRQ_START + MXS_BOARD_IRQS)
-
-#endif /* __MACH_MXS_IRQS_H__ */
diff --git a/arch/arm/mach-mxs/mach-mxs.c b/arch/arm/mach-mxs/mach-mxs.c
index cf43e5e..4748ec5 100644
--- a/arch/arm/mach-mxs/mach-mxs.c
+++ b/arch/arm/mach-mxs/mach-mxs.c
@@ -17,10 +17,8 @@
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/init.h>
-#include <linux/irqdomain.h>
#include <linux/micrel_phy.h>
#include <linux/mxsfb.h>
-#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/pinctrl/consumer.h>
@@ -141,37 +139,6 @@ static struct of_dev_auxdata mxs_auxdata_lookup[] __initdata = {
{ /* sentinel */ }
};
-static int __init mxs_icoll_add_irq_domain(struct device_node *np,
- struct device_node *interrupt_parent)
-{
- irq_domain_add_legacy(np, 128, 0, 0, &irq_domain_simple_ops, NULL);
-
- return 0;
-}
-
-static int __init mxs_gpio_add_irq_domain(struct device_node *np,
- struct device_node *interrupt_parent)
-{
- static int gpio_irq_base = MXS_GPIO_IRQ_START;
-
- irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
- gpio_irq_base += 32;
-
- return 0;
-}
-
-static const struct of_device_id mxs_irq_match[] __initconst = {
- { .compatible = "fsl,mxs-icoll", .data = mxs_icoll_add_irq_domain, },
- { .compatible = "fsl,mxs-gpio", .data = mxs_gpio_add_irq_domain, },
- { /* sentinel */ }
-};
-
-static void __init mxs_dt_init_irq(void)
-{
- icoll_init_irq();
- of_irq_init(mxs_irq_match);
-}
-
static void __init imx23_timer_init(void)
{
mx23_clocks_init();
@@ -421,7 +388,8 @@ static const char *imx28_dt_compat[] __initdata = {
DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
.map_io = mx23_map_io,
- .init_irq = mxs_dt_init_irq,
+ .init_irq = icoll_init_irq,
+ .handle_irq = icoll_handle_irq,
.timer = &imx23_timer,
.init_machine = mxs_machine_init,
.dt_compat = imx23_dt_compat,
@@ -430,7 +398,8 @@ MACHINE_END
DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
.map_io = mx28_map_io,
- .init_irq = mxs_dt_init_irq,
+ .init_irq = icoll_init_irq,
+ .handle_irq = icoll_handle_irq,
.timer = &imx28_timer,
.init_machine = mxs_machine_init,
.dt_compat = imx28_dt_compat,
diff --git a/arch/arm/mach-mxs/timer.c b/arch/arm/mach-mxs/timer.c
index 02d36de..7c37926 100644
--- a/arch/arm/mach-mxs/timer.c
+++ b/arch/arm/mach-mxs/timer.c
@@ -25,6 +25,8 @@
#include <linux/irq.h>
#include <linux/clockchips.h>
#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
#include <asm/mach/time.h>
#include <mach/mxs.h>
@@ -244,9 +246,17 @@ static int __init mxs_clocksource_init(struct clk *timer_clk)
return 0;
}
-void __init mxs_timer_init(int irq)
+void __init mxs_timer_init(void)
{
+ struct device_node *np;
struct clk *timer_clk;
+ int irq;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,timrot");
+ if (!np) {
+ pr_err("%s: failed find timrot node\n", __func__);
+ return;
+ }
timer_clk = clk_get_sys("timrot", NULL);
if (IS_ERR(timer_clk)) {
@@ -295,5 +305,6 @@ void __init mxs_timer_init(int irq)
mxs_clockevent_init(timer_clk);
/* Make irqs happen */
+ irq = irq_of_parse_and_map(np, 0);
setup_irq(irq, &mxs_timer_irq);
}
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