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-rw-r--r--arch/mips/ath79/irq.c244
-rw-r--r--arch/mips/include/asm/mach-ath79/ath79.h4
-rw-r--r--drivers/irqchip/Makefile2
-rw-r--r--drivers/irqchip/irq-ath79-cpu.c97
-rw-r--r--drivers/irqchip/irq-ath79-misc.c189
5 files changed, 313 insertions, 223 deletions
diff --git a/arch/mips/ath79/irq.c b/arch/mips/ath79/irq.c
index 511c06560dc1..2dfff1f19004 100644
--- a/arch/mips/ath79/irq.c
+++ b/arch/mips/ath79/irq.c
@@ -26,90 +26,6 @@
26#include "common.h" 26#include "common.h"
27#include "machtypes.h" 27#include "machtypes.h"
28 28
29static void __init ath79_misc_intc_domain_init(
30 struct device_node *node, int irq);
31
32static void ath79_misc_irq_handler(struct irq_desc *desc)
33{
34 struct irq_domain *domain = irq_desc_get_handler_data(desc);
35 void __iomem *base = domain->host_data;
36 u32 pending;
37
38 pending = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_STATUS) &
39 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
40
41 if (!pending) {
42 spurious_interrupt();
43 return;
44 }
45
46 while (pending) {
47 int bit = __ffs(pending);
48
49 generic_handle_irq(irq_linear_revmap(domain, bit));
50 pending &= ~BIT(bit);
51 }
52}
53
54static void ar71xx_misc_irq_unmask(struct irq_data *d)
55{
56 void __iomem *base = irq_data_get_irq_chip_data(d);
57 unsigned int irq = d->hwirq;
58 u32 t;
59
60 t = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
61 __raw_writel(t | (1 << irq), base + AR71XX_RESET_REG_MISC_INT_ENABLE);
62
63 /* flush write */
64 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
65}
66
67static void ar71xx_misc_irq_mask(struct irq_data *d)
68{
69 void __iomem *base = irq_data_get_irq_chip_data(d);
70 unsigned int irq = d->hwirq;
71 u32 t;
72
73 t = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
74 __raw_writel(t & ~(1 << irq), base + AR71XX_RESET_REG_MISC_INT_ENABLE);
75
76 /* flush write */
77 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
78}
79
80static void ar724x_misc_irq_ack(struct irq_data *d)
81{
82 void __iomem *base = irq_data_get_irq_chip_data(d);
83 unsigned int irq = d->hwirq;
84 u32 t;
85
86 t = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_STATUS);
87 __raw_writel(t & ~(1 << irq), base + AR71XX_RESET_REG_MISC_INT_STATUS);
88
89 /* flush write */
90 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_STATUS);
91}
92
93static struct irq_chip ath79_misc_irq_chip = {
94 .name = "MISC",
95 .irq_unmask = ar71xx_misc_irq_unmask,
96 .irq_mask = ar71xx_misc_irq_mask,
97};
98
99static void __init ath79_misc_irq_init(void)
100{
101 if (soc_is_ar71xx() || soc_is_ar913x())
102 ath79_misc_irq_chip.irq_mask_ack = ar71xx_misc_irq_mask;
103 else if (soc_is_ar724x() ||
104 soc_is_ar933x() ||
105 soc_is_ar934x() ||
106 soc_is_qca955x())
107 ath79_misc_irq_chip.irq_ack = ar724x_misc_irq_ack;
108 else
109 BUG();
110
111 ath79_misc_intc_domain_init(NULL, ATH79_CPU_IRQ(6));
112}
113 29
114static void ar934x_ip2_irq_dispatch(struct irq_desc *desc) 30static void ar934x_ip2_irq_dispatch(struct irq_desc *desc)
115{ 31{
@@ -212,142 +128,12 @@ static void qca955x_irq_init(void)
212 irq_set_chained_handler(ATH79_CPU_IRQ(3), qca955x_ip3_irq_dispatch); 128 irq_set_chained_handler(ATH79_CPU_IRQ(3), qca955x_ip3_irq_dispatch);
213} 129}
214 130
215/*
216 * The IP2/IP3 lines are tied to a PCI/WMAC/USB device. Drivers for
217 * these devices typically allocate coherent DMA memory, however the
218 * DMA controller may still have some unsynchronized data in the FIFO.
219 * Issue a flush in the handlers to ensure that the driver sees
220 * the update.
221 *
222 * This array map the interrupt lines to the DDR write buffer channels.
223 */
224
225static unsigned irq_wb_chan[8] = {
226 -1, -1, -1, -1, -1, -1, -1, -1,
227};
228
229asmlinkage void plat_irq_dispatch(void)
230{
231 unsigned long pending;
232 int irq;
233
234 pending = read_c0_status() & read_c0_cause() & ST0_IM;
235
236 if (!pending) {
237 spurious_interrupt();
238 return;
239 }
240
241 pending >>= CAUSEB_IP;
242 while (pending) {
243 irq = fls(pending) - 1;
244 if (irq < ARRAY_SIZE(irq_wb_chan) && irq_wb_chan[irq] != -1)
245 ath79_ddr_wb_flush(irq_wb_chan[irq]);
246 do_IRQ(MIPS_CPU_IRQ_BASE + irq);
247 pending &= ~BIT(irq);
248 }
249}
250
251static int misc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
252{
253 irq_set_chip_and_handler(irq, &ath79_misc_irq_chip, handle_level_irq);
254 irq_set_chip_data(irq, d->host_data);
255 return 0;
256}
257
258static const struct irq_domain_ops misc_irq_domain_ops = {
259 .xlate = irq_domain_xlate_onecell,
260 .map = misc_map,
261};
262
263static void __init ath79_misc_intc_domain_init(
264 struct device_node *node, int irq)
265{
266 void __iomem *base = ath79_reset_base;
267 struct irq_domain *domain;
268
269 domain = irq_domain_add_legacy(node, ATH79_MISC_IRQ_COUNT,
270 ATH79_MISC_IRQ_BASE, 0, &misc_irq_domain_ops, base);
271 if (!domain)
272 panic("Failed to add MISC irqdomain");
273
274 /* Disable and clear all interrupts */
275 __raw_writel(0, base + AR71XX_RESET_REG_MISC_INT_ENABLE);
276 __raw_writel(0, base + AR71XX_RESET_REG_MISC_INT_STATUS);
277
278 irq_set_chained_handler_and_data(irq, ath79_misc_irq_handler, domain);
279}
280
281static int __init ath79_misc_intc_of_init(
282 struct device_node *node, struct device_node *parent)
283{
284 int irq;
285
286 irq = irq_of_parse_and_map(node, 0);
287 if (!irq)
288 panic("Failed to get MISC IRQ");
289
290 ath79_misc_intc_domain_init(node, irq);
291 return 0;
292}
293
294static int __init ar7100_misc_intc_of_init(
295 struct device_node *node, struct device_node *parent)
296{
297 ath79_misc_irq_chip.irq_mask_ack = ar71xx_misc_irq_mask;
298 return ath79_misc_intc_of_init(node, parent);
299}
300
301IRQCHIP_DECLARE(ar7100_misc_intc, "qca,ar7100-misc-intc",
302 ar7100_misc_intc_of_init);
303
304static int __init ar7240_misc_intc_of_init(
305 struct device_node *node, struct device_node *parent)
306{
307 ath79_misc_irq_chip.irq_ack = ar724x_misc_irq_ack;
308 return ath79_misc_intc_of_init(node, parent);
309}
310
311IRQCHIP_DECLARE(ar7240_misc_intc, "qca,ar7240-misc-intc",
312 ar7240_misc_intc_of_init);
313
314static int __init ar79_cpu_intc_of_init(
315 struct device_node *node, struct device_node *parent)
316{
317 int err, i, count;
318
319 /* Fill the irq_wb_chan table */
320 count = of_count_phandle_with_args(
321 node, "qca,ddr-wb-channels", "#qca,ddr-wb-channel-cells");
322
323 for (i = 0; i < count; i++) {
324 struct of_phandle_args args;
325 u32 irq = i;
326
327 of_property_read_u32_index(
328 node, "qca,ddr-wb-channel-interrupts", i, &irq);
329 if (irq >= ARRAY_SIZE(irq_wb_chan))
330 continue;
331
332 err = of_parse_phandle_with_args(
333 node, "qca,ddr-wb-channels",
334 "#qca,ddr-wb-channel-cells",
335 i, &args);
336 if (err)
337 return err;
338
339 irq_wb_chan[irq] = args.args[0];
340 pr_info("IRQ: Set flush channel of IRQ%d to %d\n",
341 irq, args.args[0]);
342 }
343
344 return mips_cpu_irq_of_init(node, parent);
345}
346IRQCHIP_DECLARE(ar79_cpu_intc, "qca,ar7100-cpu-intc",
347 ar79_cpu_intc_of_init);
348
349void __init arch_init_irq(void) 131void __init arch_init_irq(void)
350{ 132{
133 unsigned irq_wb_chan2 = -1;
134 unsigned irq_wb_chan3 = -1;
135 bool misc_is_ar71xx;
136
351 if (mips_machtype == ATH79_MACH_GENERIC_OF) { 137 if (mips_machtype == ATH79_MACH_GENERIC_OF) {
352 irqchip_init(); 138 irqchip_init();
353 return; 139 return;
@@ -355,14 +141,26 @@ void __init arch_init_irq(void)
355 141
356 if (soc_is_ar71xx() || soc_is_ar724x() || 142 if (soc_is_ar71xx() || soc_is_ar724x() ||
357 soc_is_ar913x() || soc_is_ar933x()) { 143 soc_is_ar913x() || soc_is_ar933x()) {
358 irq_wb_chan[2] = 3; 144 irq_wb_chan2 = 3;
359 irq_wb_chan[3] = 2; 145 irq_wb_chan3 = 2;
360 } else if (soc_is_ar934x()) { 146 } else if (soc_is_ar934x()) {
361 irq_wb_chan[3] = 2; 147 irq_wb_chan3 = 2;
362 } 148 }
363 149
364 mips_cpu_irq_init(); 150 ath79_cpu_irq_init(irq_wb_chan2, irq_wb_chan3);
365 ath79_misc_irq_init(); 151
152 if (soc_is_ar71xx() || soc_is_ar913x())
153 misc_is_ar71xx = true;
154 else if (soc_is_ar724x() ||
155 soc_is_ar933x() ||
156 soc_is_ar934x() ||
157 soc_is_qca955x())
158 misc_is_ar71xx = false;
159 else
160 BUG();
161 ath79_misc_irq_init(
162 ath79_reset_base + AR71XX_RESET_REG_MISC_INT_STATUS,
163 ATH79_CPU_IRQ(6), ATH79_MISC_IRQ_BASE, misc_is_ar71xx);
366 164
367 if (soc_is_ar934x()) 165 if (soc_is_ar934x())
368 ar934x_ip2_irq_init(); 166 ar934x_ip2_irq_init();
diff --git a/arch/mips/include/asm/mach-ath79/ath79.h b/arch/mips/include/asm/mach-ath79/ath79.h
index 2b3487213d1e..441faa92c3cd 100644
--- a/arch/mips/include/asm/mach-ath79/ath79.h
+++ b/arch/mips/include/asm/mach-ath79/ath79.h
@@ -144,4 +144,8 @@ static inline u32 ath79_reset_rr(unsigned reg)
144void ath79_device_reset_set(u32 mask); 144void ath79_device_reset_set(u32 mask);
145void ath79_device_reset_clear(u32 mask); 145void ath79_device_reset_clear(u32 mask);
146 146
147void ath79_cpu_irq_init(unsigned irq_wb_chan2, unsigned irq_wb_chan3);
148void ath79_misc_irq_init(void __iomem *regs, int irq,
149 int irq_base, bool is_ar71xx);
150
147#endif /* __ASM_MACH_ATH79_H */ 151#endif /* __ASM_MACH_ATH79_H */
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index be6ada6eaab3..f71bbc7906ba 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -1,5 +1,7 @@
1obj-$(CONFIG_IRQCHIP) += irqchip.o 1obj-$(CONFIG_IRQCHIP) += irqchip.o
2 2
3obj-$(CONFIG_ATH79) += irq-ath79-cpu.o
4obj-$(CONFIG_ATH79) += irq-ath79-misc.o
3obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o 5obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o
4obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2836.o 6obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2836.o
5obj-$(CONFIG_ARCH_EXYNOS) += exynos-combiner.o 7obj-$(CONFIG_ARCH_EXYNOS) += exynos-combiner.o
diff --git a/drivers/irqchip/irq-ath79-cpu.c b/drivers/irqchip/irq-ath79-cpu.c
new file mode 100644
index 000000000000..befe93c5a51a
--- /dev/null
+++ b/drivers/irqchip/irq-ath79-cpu.c
@@ -0,0 +1,97 @@
1/*
2 * Atheros AR71xx/AR724x/AR913x specific interrupt handling
3 *
4 * Copyright (C) 2015 Alban Bedel <albeu@free.fr>
5 * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
6 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
7 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
8 *
9 * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 as published
13 * by the Free Software Foundation.
14 */
15
16#include <linux/interrupt.h>
17#include <linux/irqchip.h>
18#include <linux/of.h>
19
20#include <asm/irq_cpu.h>
21#include <asm/mach-ath79/ath79.h>
22
23/*
24 * The IP2/IP3 lines are tied to a PCI/WMAC/USB device. Drivers for
25 * these devices typically allocate coherent DMA memory, however the
26 * DMA controller may still have some unsynchronized data in the FIFO.
27 * Issue a flush in the handlers to ensure that the driver sees
28 * the update.
29 *
30 * This array map the interrupt lines to the DDR write buffer channels.
31 */
32
33static unsigned irq_wb_chan[8] = {
34 -1, -1, -1, -1, -1, -1, -1, -1,
35};
36
37asmlinkage void plat_irq_dispatch(void)
38{
39 unsigned long pending;
40 int irq;
41
42 pending = read_c0_status() & read_c0_cause() & ST0_IM;
43
44 if (!pending) {
45 spurious_interrupt();
46 return;
47 }
48
49 pending >>= CAUSEB_IP;
50 while (pending) {
51 irq = fls(pending) - 1;
52 if (irq < ARRAY_SIZE(irq_wb_chan) && irq_wb_chan[irq] != -1)
53 ath79_ddr_wb_flush(irq_wb_chan[irq]);
54 do_IRQ(MIPS_CPU_IRQ_BASE + irq);
55 pending &= ~BIT(irq);
56 }
57}
58
59static int __init ar79_cpu_intc_of_init(
60 struct device_node *node, struct device_node *parent)
61{
62 int err, i, count;
63
64 /* Fill the irq_wb_chan table */
65 count = of_count_phandle_with_args(
66 node, "qca,ddr-wb-channels", "#qca,ddr-wb-channel-cells");
67
68 for (i = 0; i < count; i++) {
69 struct of_phandle_args args;
70 u32 irq = i;
71
72 of_property_read_u32_index(
73 node, "qca,ddr-wb-channel-interrupts", i, &irq);
74 if (irq >= ARRAY_SIZE(irq_wb_chan))
75 continue;
76
77 err = of_parse_phandle_with_args(
78 node, "qca,ddr-wb-channels",
79 "#qca,ddr-wb-channel-cells",
80 i, &args);
81 if (err)
82 return err;
83
84 irq_wb_chan[irq] = args.args[0];
85 }
86
87 return mips_cpu_irq_of_init(node, parent);
88}
89IRQCHIP_DECLARE(ar79_cpu_intc, "qca,ar7100-cpu-intc",
90 ar79_cpu_intc_of_init);
91
92void __init ath79_cpu_irq_init(unsigned irq_wb_chan2, unsigned irq_wb_chan3)
93{
94 irq_wb_chan[2] = irq_wb_chan2;
95 irq_wb_chan[3] = irq_wb_chan3;
96 mips_cpu_irq_init();
97}
diff --git a/drivers/irqchip/irq-ath79-misc.c b/drivers/irqchip/irq-ath79-misc.c
new file mode 100644
index 000000000000..aa7290784636
--- /dev/null
+++ b/drivers/irqchip/irq-ath79-misc.c
@@ -0,0 +1,189 @@
1/*
2 * Atheros AR71xx/AR724x/AR913x MISC interrupt controller
3 *
4 * Copyright (C) 2015 Alban Bedel <albeu@free.fr>
5 * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
6 * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
7 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
8 *
9 * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 as published
13 * by the Free Software Foundation.
14 */
15
16#include <linux/irqchip.h>
17#include <linux/irqchip/chained_irq.h>
18#include <linux/of_address.h>
19#include <linux/of_irq.h>
20
21#define AR71XX_RESET_REG_MISC_INT_STATUS 0
22#define AR71XX_RESET_REG_MISC_INT_ENABLE 4
23
24#define ATH79_MISC_IRQ_COUNT 32
25
26static void ath79_misc_irq_handler(struct irq_desc *desc)
27{
28 struct irq_domain *domain = irq_desc_get_handler_data(desc);
29 struct irq_chip *chip = irq_desc_get_chip(desc);
30 void __iomem *base = domain->host_data;
31 u32 pending;
32
33 chained_irq_enter(chip, desc);
34
35 pending = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_STATUS) &
36 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
37
38 if (!pending) {
39 spurious_interrupt();
40 chained_irq_exit(chip, desc);
41 return;
42 }
43
44 while (pending) {
45 int bit = __ffs(pending);
46
47 generic_handle_irq(irq_linear_revmap(domain, bit));
48 pending &= ~BIT(bit);
49 }
50
51 chained_irq_exit(chip, desc);
52}
53
54static void ar71xx_misc_irq_unmask(struct irq_data *d)
55{
56 void __iomem *base = irq_data_get_irq_chip_data(d);
57 unsigned int irq = d->hwirq;
58 u32 t;
59
60 t = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
61 __raw_writel(t | BIT(irq), base + AR71XX_RESET_REG_MISC_INT_ENABLE);
62
63 /* flush write */
64 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
65}
66
67static void ar71xx_misc_irq_mask(struct irq_data *d)
68{
69 void __iomem *base = irq_data_get_irq_chip_data(d);
70 unsigned int irq = d->hwirq;
71 u32 t;
72
73 t = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
74 __raw_writel(t & ~BIT(irq), base + AR71XX_RESET_REG_MISC_INT_ENABLE);
75
76 /* flush write */
77 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_ENABLE);
78}
79
80static void ar724x_misc_irq_ack(struct irq_data *d)
81{
82 void __iomem *base = irq_data_get_irq_chip_data(d);
83 unsigned int irq = d->hwirq;
84 u32 t;
85
86 t = __raw_readl(base + AR71XX_RESET_REG_MISC_INT_STATUS);
87 __raw_writel(t & ~BIT(irq), base + AR71XX_RESET_REG_MISC_INT_STATUS);
88
89 /* flush write */
90 __raw_readl(base + AR71XX_RESET_REG_MISC_INT_STATUS);
91}
92
93static struct irq_chip ath79_misc_irq_chip = {
94 .name = "MISC",
95 .irq_unmask = ar71xx_misc_irq_unmask,
96 .irq_mask = ar71xx_misc_irq_mask,
97};
98
99static int misc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
100{
101 irq_set_chip_and_handler(irq, &ath79_misc_irq_chip, handle_level_irq);
102 irq_set_chip_data(irq, d->host_data);
103 return 0;
104}
105
106static const struct irq_domain_ops misc_irq_domain_ops = {
107 .xlate = irq_domain_xlate_onecell,
108 .map = misc_map,
109};
110
111static void __init ath79_misc_intc_domain_init(
112 struct irq_domain *domain, int irq)
113{
114 void __iomem *base = domain->host_data;
115
116 /* Disable and clear all interrupts */
117 __raw_writel(0, base + AR71XX_RESET_REG_MISC_INT_ENABLE);
118 __raw_writel(0, base + AR71XX_RESET_REG_MISC_INT_STATUS);
119
120 irq_set_chained_handler_and_data(irq, ath79_misc_irq_handler, domain);
121}
122
123static int __init ath79_misc_intc_of_init(
124 struct device_node *node, struct device_node *parent)
125{
126 struct irq_domain *domain;
127 void __iomem *base;
128 int irq;
129
130 irq = irq_of_parse_and_map(node, 0);
131 if (!irq) {
132 pr_err("Failed to get MISC IRQ\n");
133 return -EINVAL;
134 }
135
136 base = of_iomap(node, 0);
137 if (!base) {
138 pr_err("Failed to get MISC IRQ registers\n");
139 return -ENOMEM;
140 }
141
142 domain = irq_domain_add_linear(node, ATH79_MISC_IRQ_COUNT,
143 &misc_irq_domain_ops, base);
144 if (!domain) {
145 pr_err("Failed to add MISC irqdomain\n");
146 return -EINVAL;
147 }
148
149 ath79_misc_intc_domain_init(domain, irq);
150 return 0;
151}
152
153static int __init ar7100_misc_intc_of_init(
154 struct device_node *node, struct device_node *parent)
155{
156 ath79_misc_irq_chip.irq_mask_ack = ar71xx_misc_irq_mask;
157 return ath79_misc_intc_of_init(node, parent);
158}
159
160IRQCHIP_DECLARE(ar7100_misc_intc, "qca,ar7100-misc-intc",
161 ar7100_misc_intc_of_init);
162
163static int __init ar7240_misc_intc_of_init(
164 struct device_node *node, struct device_node *parent)
165{
166 ath79_misc_irq_chip.irq_ack = ar724x_misc_irq_ack;
167 return ath79_misc_intc_of_init(node, parent);
168}
169
170IRQCHIP_DECLARE(ar7240_misc_intc, "qca,ar7240-misc-intc",
171 ar7240_misc_intc_of_init);
172
173void __init ath79_misc_irq_init(void __iomem *regs, int irq,
174 int irq_base, bool is_ar71xx)
175{
176 struct irq_domain *domain;
177
178 if (is_ar71xx)
179 ath79_misc_irq_chip.irq_mask_ack = ar71xx_misc_irq_mask;
180 else
181 ath79_misc_irq_chip.irq_ack = ar724x_misc_irq_ack;
182
183 domain = irq_domain_add_legacy(NULL, ATH79_MISC_IRQ_COUNT,
184 irq_base, 0, &misc_irq_domain_ops, regs);
185 if (!domain)
186 panic("Failed to create MISC irqdomain");
187
188 ath79_misc_intc_domain_init(domain, irq);
189}