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Message-Id: <201306261602.26800.arnd@arndb.de>
Date: Wed, 26 Jun 2013 16:02:26 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Sachin Kamat <sachin.kamat@...aro.org>
Cc: linux-samsung-soc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
kgene.kim@...sung.com, tglx@...utronix.de, t.figa@...sung.com,
patches@...aro.org
Subject: Re: [PATCH 1/2] ARM: EXYNOS: Remove combiner_init declaration
On Wednesday 26 June 2013, Sachin Kamat wrote:
> Commit d243997f ("ARM: EXYNOS: Remove legacy interrupt initialization
> code") removed the call to combiner_init(). Since there are no more
> users in the machine code, remove the declaration as well.
>
> Signed-off-by: Sachin Kamat <sachin.kamat@...aro.org>
Hi,
Your two patches look good to me, but I think there is more that
can be cleaned up now. See below for my experimental patch.
I have not gotten around to test or submit that, but feel
free to take any contents for your own patches.
Arnd
commit 3ee3acd595728d20b1a23fccc9684479749833e6
Author: Arnd Bergmann <arnd@...db.de>
Date: Fri Jun 14 15:47:26 2013 +0200
irqchip: exynos: remove ATAGS code
With 3.11, the exynos platform will only support DT based booting,
so we can kill off a lot of code from this driver.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index 3e156bc..a659ace 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -71,10 +71,6 @@ void exynos4212_register_clocks(void);
#define exynos4212_register_clocks()
#endif
-struct device_node;
-void combiner_init(void __iomem *combiner_base, struct device_node *np,
- unsigned int max_nr, int irq_base);
-
extern struct smp_operations exynos_smp_ops;
extern void exynos_cpu_die(unsigned int cpu);
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 55df3bd..e6b9137 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -1,7 +1,7 @@
obj-$(CONFIG_IRQCHIP) += irqchip.o
obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o
-obj-$(CONFIG_ARCH_EXYNOS) += exynos-combiner.o
+obj-$(CONFIG_ARCH_EXYNOS_COMMON) += exynos-combiner.o
obj-$(CONFIG_ARCH_MVEBU) += irq-armada-370-xp.o
obj-$(CONFIG_ARCH_MXS) += irq-mxs.o
obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o
diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
index a9d2b2f..d6ba2f7 100644
--- a/drivers/irqchip/exynos-combiner.c
+++ b/drivers/irqchip/exynos-combiner.c
@@ -19,10 +19,6 @@
#include <linux/of_irq.h>
#include <asm/mach/irq.h>
-#ifdef CONFIG_EXYNOS_ATAGS
-#include <plat/cpu.h>
-#endif
-
#include "irqchip.h"
#define COMBINER_ENABLE_SET 0x0
@@ -138,7 +134,6 @@ static void __init combiner_init_one(struct combiner_chip_data *combiner_data,
__raw_writel(combiner_data->irq_mask, base + COMBINER_ENABLE_CLEAR);
}
-#ifdef CONFIG_OF
static int combiner_irq_domain_xlate(struct irq_domain *d,
struct device_node *controller,
const u32 *intspec, unsigned int intsize,
@@ -156,16 +151,6 @@ static int combiner_irq_domain_xlate(struct irq_domain *d,
return 0;
}
-#else
-static int combiner_irq_domain_xlate(struct irq_domain *d,
- struct device_node *controller,
- const u32 *intspec, unsigned int intsize,
- unsigned long *out_hwirq,
- unsigned int *out_type)
-{
- return -EINVAL;
-}
-#endif
static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
@@ -184,95 +169,48 @@ static struct irq_domain_ops combiner_irq_domain_ops = {
.map = combiner_irq_domain_map,
};
-static unsigned int combiner_lookup_irq(int group)
-{
-#ifdef CONFIG_EXYNOS_ATAGS
- if (group < EXYNOS4210_MAX_COMBINER_NR || soc_is_exynos5250())
- return IRQ_SPI(group);
-
- switch (group) {
- case 16:
- return IRQ_SPI(107);
- case 17:
- return IRQ_SPI(108);
- case 18:
- return IRQ_SPI(48);
- case 19:
- return IRQ_SPI(42);
- }
-#endif
- return 0;
-}
-
-void __init combiner_init(void __iomem *combiner_base,
- struct device_node *np,
- unsigned int max_nr,
- int irq_base)
+static int __init combiner_init(struct device_node *np)
{
int i, irq;
+ unsigned int max_nr = 20;
unsigned int nr_irq;
+ void __iomem *combiner_base;
struct combiner_chip_data *combiner_data;
+ combiner_base = of_iomap(np, 0);
+ if (!combiner_base) {
+ pr_err("%s: failed to map combiner registers\n", __func__);
+ return -ENXIO;
+ }
+
+ if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
+ pr_info("%s: number of combiners not specified, "
+ "setting default as %d.\n",
+ __func__, max_nr);
+ }
+
nr_irq = max_nr * IRQ_IN_COMBINER;
combiner_data = kcalloc(max_nr, sizeof (*combiner_data), GFP_KERNEL);
if (!combiner_data) {
pr_warning("%s: could not allocate combiner data\n", __func__);
- return;
+ return -ENOMEM;
}
- combiner_irq_domain = irq_domain_add_simple(np, nr_irq, irq_base,
+ combiner_irq_domain = irq_domain_add_simple(np, nr_irq, -1,
&combiner_irq_domain_ops, combiner_data);
if (WARN_ON(!combiner_irq_domain)) {
pr_warning("%s: irq domain init failed\n", __func__);
- return;
+ return -EINVAL;
}
for (i = 0; i < max_nr; i++) {
-#ifdef CONFIG_OF
- if (np)
- irq = irq_of_parse_and_map(np, i);
- else
-#endif
- irq = combiner_lookup_irq(i);
-
+ irq = irq_of_parse_and_map(np, i);
combiner_init_one(&combiner_data[i], i,
combiner_base + (i >> 2) * 0x10, irq);
combiner_cascade_irq(&combiner_data[i], irq);
}
-}
-
-#ifdef CONFIG_OF
-static int __init combiner_of_init(struct device_node *np,
- struct device_node *parent)
-{
- void __iomem *combiner_base;
- unsigned int max_nr = 20;
- int irq_base = -1;
-
- combiner_base = of_iomap(np, 0);
- if (!combiner_base) {
- pr_err("%s: failed to map combiner registers\n", __func__);
- return -ENXIO;
- }
-
- if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
- pr_info("%s: number of combiners not specified, "
- "setting default as %d.\n",
- __func__, max_nr);
- }
-
- /*
- * FIXME: This is a hardwired COMBINER_IRQ(0,0). Once all devices
- * get their IRQ from DT, remove this in order to get dynamic
- * allocation.
- */
- irq_base = 160;
-
- combiner_init(combiner_base, np, max_nr, irq_base);
return 0;
}
-IRQCHIP_DECLARE(exynos4210_combiner, "samsung,exynos4210-combiner",
- combiner_of_init);
-#endif
+IRQCHIP_DECLARE(exynos_combiner, "samsung,exynos4210-combiner", combiner_init);
--
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