From: Arnaud Degroote <arnaud.degroote@isae-supaero.fr>
Date: Fri, 23 Jan 2015 15:11:53 +0000 (+0100)
Subject: Initial porting of xenomai on exynos4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a246d035a06c3ff8dc1a05ed5c8ecbc3cda09bd3;p=platform%2Fkernel%2Flinux-exynos.git

Initial porting of xenomai on exynos4

Based on patch from kinsamanka

Signed-off-by: Arnaud Degroote <arnaud.degroote@isae-supaero.fr>
[patch taken from https://github.com/adegroote/linux.git
 linux-stable-xenomai-odroid-3.18.y branch, adapted to v4.14
 IPIPE changes (added IRQCHIP_PIPELINE_SAFE flags to irqchips)]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 429ca8ed7e51..ceadb18265bf 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -267,6 +267,7 @@ static const struct irq_chip regmap_irq_chip = {
 	.irq_enable		= regmap_irq_enable,
 	.irq_set_type		= regmap_irq_set_type,
 	.irq_set_wake		= regmap_irq_set_wake,
+	.flags			= IRQCHIP_PIPELINE_SAFE,
 };
 
 static irqreturn_t regmap_irq_thread(int irq, void *d)
diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
index b78a169c9c83..2c5fc74ad69c 100644
--- a/drivers/irqchip/exynos-combiner.c
+++ b/drivers/irqchip/exynos-combiner.c
@@ -20,6 +20,7 @@
 #include <linux/interrupt.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
+#include <linux/ipipe.h>
 
 #define COMBINER_ENABLE_SET	0x0
 #define COMBINER_ENABLE_CLEAR	0x4
@@ -27,7 +28,7 @@
 
 #define IRQ_IN_COMBINER		8
 
-static DEFINE_SPINLOCK(irq_controller_lock);
+static IPIPE_DEFINE_SPINLOCK(irq_controller_lock);
 
 struct combiner_chip_data {
 	unsigned int hwirq_offset;
@@ -88,7 +89,7 @@ static void combiner_handle_cascade_irq(struct irq_desc *desc)
 	if (unlikely(!cascade_irq))
 		handle_bad_irq(desc);
 	else
-		generic_handle_irq(cascade_irq);
+		ipipe_handle_demuxed_irq(cascade_irq);
 
  out:
 	chained_irq_exit(chip, desc);
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index c8d0de7ea160..4a2aaceef834 100644
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -29,6 +29,7 @@
 #include <linux/spinlock.h>
 #include <linux/regmap.h>
 #include <linux/err.h>
+#include <linux/ipipe.h>
 #include <linux/soc/samsung/exynos-pmu.h>
 
 #include <dt-bindings/pinctrl/samsung.h>
@@ -216,6 +217,7 @@ static struct exynos_irq_chip exynos_gpio_irq_chip = {
 		.irq_set_type = exynos_irq_set_type,
 		.irq_request_resources = exynos_irq_request_resources,
 		.irq_release_resources = exynos_irq_release_resources,
+		.flags		= IRQCHIP_PIPELINE_SAFE,
 	},
 	.eint_con = EXYNOS_GPIO_ECON_OFFSET,
 	.eint_mask = EXYNOS_GPIO_EMASK_OFFSET,
@@ -258,7 +260,7 @@ static irqreturn_t exynos_eint_gpio_irq(int irq, void *data)
 	virq = irq_linear_revmap(bank->irq_domain, pin);
 	if (!virq)
 		return IRQ_NONE;
-	generic_handle_irq(virq);
+	ipipe_handle_demuxed_irq(virq);
 	return IRQ_HANDLED;
 }
 
@@ -361,6 +363,7 @@ static const struct exynos_irq_chip exynos4210_wkup_irq_chip __initconst = {
 		.irq_set_wake = exynos_wkup_irq_set_wake,
 		.irq_request_resources = exynos_irq_request_resources,
 		.irq_release_resources = exynos_irq_release_resources,
+		.flags		= IRQCHIP_PIPELINE_SAFE,
 	},
 	.eint_con = EXYNOS_WKUP_ECON_OFFSET,
 	.eint_mask = EXYNOS_WKUP_EMASK_OFFSET,
@@ -377,6 +380,7 @@ static const struct exynos_irq_chip exynos7_wkup_irq_chip __initconst = {
 		.irq_set_wake = exynos_wkup_irq_set_wake,
 		.irq_request_resources = exynos_irq_request_resources,
 		.irq_release_resources = exynos_irq_release_resources,
+		.flags		= IRQCHIP_PIPELINE_SAFE,
 	},
 	.eint_con = EXYNOS7_WKUP_ECON_OFFSET,
 	.eint_mask = EXYNOS7_WKUP_EMASK_OFFSET,
@@ -403,7 +407,7 @@ static void exynos_irq_eint0_15(struct irq_desc *desc)
 	chained_irq_enter(chip, desc);
 
 	eint_irq = irq_linear_revmap(bank->irq_domain, eintd->irq);
-	generic_handle_irq(eint_irq);
+	ipipe_handle_demuxed_irq(eint_irq);
 
 	chained_irq_exit(chip, desc);
 }
@@ -415,7 +419,7 @@ static inline void exynos_irq_demux_eint(unsigned long pend,
 
 	while (pend) {
 		irq = fls(pend) - 1;
-		generic_handle_irq(irq_find_mapping(domain, irq));
+		ipipe_handle_demuxed_irq(irq_find_mapping(domain, irq));
 		pend &= ~(1 << irq);
 	}
 }
diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.h b/drivers/pinctrl/samsung/pinctrl-samsung.h
index 9af07af6cad6..9f2eb54d90c5 100644
--- a/drivers/pinctrl/samsung/pinctrl-samsung.h
+++ b/drivers/pinctrl/samsung/pinctrl-samsung.h
@@ -175,7 +175,7 @@ struct samsung_pin_bank {
 	struct gpio_chip gpio_chip;
 	struct pinctrl_gpio_range grange;
 	struct exynos_irq_chip *irq_chip;
-	spinlock_t slock;
+	ipipe_spinlock_t slock;
 
 	u32 pm_save[PINCFG_TYPE_NUM + 1]; /* +1 to handle double CON registers*/
 };