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

6 files changed, 72 insertions, 113 deletions

diff --git a/arch/arm/mach-mxs/icoll.c b/arch/arm/mach-mxs/icoll.c
index 23ca9d083b2..8fb23af154b 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 4dec79563f1..be5a9c93cb2 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 0c14259705b..00000000000
--- 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 f771039b814..00000000000
--- 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 cf43e5effb9..4748ec551a6 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 02d36de9c4e..7c379261339 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);
 }