ARM: dove: fix legacy dove IRQ numbers

v3.18 changed handle_IRQ() to call __handle_domain_irq(), which now
rejects attempts to deliver IRQ0.  Since IRQ 0 is used as the timer
interrupt (just like the PIT on x86), this causes boot to fail as the
bogomips calibration never completes.

Fix this by shuffling all interrupts up by one.

Fixes: a71b092a ("ARM: Convert handle_IRQ to use __handle_domain_irq")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/mach-dove/include/mach/irqs.h

@@ -14,73 +14,73 @@
 /*
  * Dove Low Interrupt Controller
  */
-#define IRQ_DOVE_BRIDGE		0
-#define IRQ_DOVE_H2C		1
-#define IRQ_DOVE_C2H		2
-#define IRQ_DOVE_NAND		3
-#define IRQ_DOVE_PDMA		4
-#define IRQ_DOVE_SPI1		5
-#define IRQ_DOVE_SPI0		6
-#define IRQ_DOVE_UART_0		7
-#define IRQ_DOVE_UART_1		8
-#define IRQ_DOVE_UART_2		9
-#define IRQ_DOVE_UART_3		10
-#define IRQ_DOVE_I2C		11
-#define IRQ_DOVE_GPIO_0_7	12
-#define IRQ_DOVE_GPIO_8_15	13
-#define IRQ_DOVE_GPIO_16_23	14
-#define IRQ_DOVE_PCIE0_ERR	15
-#define IRQ_DOVE_PCIE0		16
-#define IRQ_DOVE_PCIE1_ERR	17
-#define IRQ_DOVE_PCIE1		18
-#define IRQ_DOVE_I2S0		19
-#define IRQ_DOVE_I2S0_ERR	20
-#define IRQ_DOVE_I2S1		21
-#define IRQ_DOVE_I2S1_ERR	22
-#define IRQ_DOVE_USB_ERR	23
-#define IRQ_DOVE_USB0		24
-#define IRQ_DOVE_USB1		25
-#define IRQ_DOVE_GE00_RX	26
-#define IRQ_DOVE_GE00_TX	27
-#define IRQ_DOVE_GE00_MISC	28
-#define IRQ_DOVE_GE00_SUM	29
-#define IRQ_DOVE_GE00_ERR	30
-#define IRQ_DOVE_CRYPTO		31
+#define IRQ_DOVE_BRIDGE		(1 + 0)
+#define IRQ_DOVE_H2C		(1 + 1)
+#define IRQ_DOVE_C2H		(1 + 2)
+#define IRQ_DOVE_NAND		(1 + 3)
+#define IRQ_DOVE_PDMA		(1 + 4)
+#define IRQ_DOVE_SPI1		(1 + 5)
+#define IRQ_DOVE_SPI0		(1 + 6)
+#define IRQ_DOVE_UART_0		(1 + 7)
+#define IRQ_DOVE_UART_1		(1 + 8)
+#define IRQ_DOVE_UART_2		(1 + 9)
+#define IRQ_DOVE_UART_3		(1 + 10)
+#define IRQ_DOVE_I2C		(1 + 11)
+#define IRQ_DOVE_GPIO_0_7	(1 + 12)
+#define IRQ_DOVE_GPIO_8_15	(1 + 13)
+#define IRQ_DOVE_GPIO_16_23	(1 + 14)
+#define IRQ_DOVE_PCIE0_ERR	(1 + 15)
+#define IRQ_DOVE_PCIE0		(1 + 16)
+#define IRQ_DOVE_PCIE1_ERR	(1 + 17)
+#define IRQ_DOVE_PCIE1		(1 + 18)
+#define IRQ_DOVE_I2S0		(1 + 19)
+#define IRQ_DOVE_I2S0_ERR	(1 + 20)
+#define IRQ_DOVE_I2S1		(1 + 21)
+#define IRQ_DOVE_I2S1_ERR	(1 + 22)
+#define IRQ_DOVE_USB_ERR	(1 + 23)
+#define IRQ_DOVE_USB0		(1 + 24)
+#define IRQ_DOVE_USB1		(1 + 25)
+#define IRQ_DOVE_GE00_RX	(1 + 26)
+#define IRQ_DOVE_GE00_TX	(1 + 27)
+#define IRQ_DOVE_GE00_MISC	(1 + 28)
+#define IRQ_DOVE_GE00_SUM	(1 + 29)
+#define IRQ_DOVE_GE00_ERR	(1 + 30)
+#define IRQ_DOVE_CRYPTO		(1 + 31)
 
 /*
  * Dove High Interrupt Controller
  */
-#define IRQ_DOVE_AC97		32
-#define IRQ_DOVE_PMU		33
-#define IRQ_DOVE_CAM		34
-#define IRQ_DOVE_SDIO0		35
-#define IRQ_DOVE_SDIO1		36
-#define IRQ_DOVE_SDIO0_WAKEUP	37
-#define IRQ_DOVE_SDIO1_WAKEUP	38
-#define IRQ_DOVE_XOR_00		39
-#define IRQ_DOVE_XOR_01		40
-#define IRQ_DOVE_XOR0_ERR	41
-#define IRQ_DOVE_XOR_10		42
-#define IRQ_DOVE_XOR_11		43
-#define IRQ_DOVE_XOR1_ERR	44
-#define IRQ_DOVE_LCD_DCON	45
-#define IRQ_DOVE_LCD1		46
-#define IRQ_DOVE_LCD0		47
-#define IRQ_DOVE_GPU		48
-#define IRQ_DOVE_PERFORM_MNTR	49
-#define IRQ_DOVE_VPRO_DMA1	51
-#define IRQ_DOVE_SSP_TIMER	54
-#define IRQ_DOVE_SSP		55
-#define IRQ_DOVE_MC_L2_ERR	56
-#define IRQ_DOVE_CRYPTO_ERR	59
-#define IRQ_DOVE_GPIO_24_31	60
-#define IRQ_DOVE_HIGH_GPIO	61
-#define IRQ_DOVE_SATA		62
+#define IRQ_DOVE_AC97		(1 + 32)
+#define IRQ_DOVE_PMU		(1 + 33)
+#define IRQ_DOVE_CAM		(1 + 34)
+#define IRQ_DOVE_SDIO0		(1 + 35)
+#define IRQ_DOVE_SDIO1		(1 + 36)
+#define IRQ_DOVE_SDIO0_WAKEUP	(1 + 37)
+#define IRQ_DOVE_SDIO1_WAKEUP	(1 + 38)
+#define IRQ_DOVE_XOR_00		(1 + 39)
+#define IRQ_DOVE_XOR_01		(1 + 40)
+#define IRQ_DOVE_XOR0_ERR	(1 + 41)
+#define IRQ_DOVE_XOR_10		(1 + 42)
+#define IRQ_DOVE_XOR_11		(1 + 43)
+#define IRQ_DOVE_XOR1_ERR	(1 + 44)
+#define IRQ_DOVE_LCD_DCON	(1 + 45)
+#define IRQ_DOVE_LCD1		(1 + 46)
+#define IRQ_DOVE_LCD0		(1 + 47)
+#define IRQ_DOVE_GPU		(1 + 48)
+#define IRQ_DOVE_PERFORM_MNTR	(1 + 49)
+#define IRQ_DOVE_VPRO_DMA1	(1 + 51)
+#define IRQ_DOVE_SSP_TIMER	(1 + 54)
+#define IRQ_DOVE_SSP		(1 + 55)
+#define IRQ_DOVE_MC_L2_ERR	(1 + 56)
+#define IRQ_DOVE_CRYPTO_ERR	(1 + 59)
+#define IRQ_DOVE_GPIO_24_31	(1 + 60)
+#define IRQ_DOVE_HIGH_GPIO	(1 + 61)
+#define IRQ_DOVE_SATA		(1 + 62)
 
 /*
  * DOVE General Purpose Pins
  */
-#define IRQ_DOVE_GPIO_START	64
+#define IRQ_DOVE_GPIO_START	65
 #define NR_GPIO_IRQS		64
 
 /*

arch/arm/mach-dove/irq.c

@@ -126,14 +126,14 @@ __exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs)
 	stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF);
 	stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF);
 	if (stat) {
-		unsigned int hwirq = __fls(stat);
+		unsigned int hwirq = 1 + __fls(stat);
 		handle_IRQ(hwirq, regs);
 		return;
 	}
 	stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF);
 	stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF);
 	if (stat) {
-		unsigned int hwirq = 32 + __fls(stat);
+		unsigned int hwirq = 33 + __fls(stat);
 		handle_IRQ(hwirq, regs);
 		return;
 	}
@@ -144,8 +144,8 @@ void __init dove_init_irq(void)
 {
 	int i;
 
-	orion_irq_init(0, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
-	orion_irq_init(32, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
+	orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
+	orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
 
 #ifdef CONFIG_MULTI_IRQ_HANDLER
 	set_handle_irq(dove_legacy_handle_irq);