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authorShawn Guo <shawn.guo@linaro.org>2012-06-13 16:37:04 +0800
committerShawn Guo <shawn.guo@linaro.org>2012-07-01 21:58:15 +0800
commitec7828807b14aab647a43c5b4ee2084de273c172 (patch)
tree9c8152469958e2d5dce30b126517dc6eb0f2cad9 /arch/arm/plat-mxc
parented4a7fb01a467f5d264fe12f17eb981f21c7bbcd (diff)
ARM: imx: add a legacy irqdomain for 3ds_debugboard
Call irq_alloc_descs to get the irq_base for 3ds_debugboard, and add a legacy irqdomain using the irq_base, so that the mapping between 3ds_debugboard hardware irq and Linux irq number can be dynamically handled by irqdomain. As the result, the use of MXC_BOARD_IRQ_START can be completely removed from 3ds_debugboard.c. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r--arch/arm/plat-mxc/3ds_debugboard.c42
1 files changed, 25 insertions, 17 deletions
diff --git a/arch/arm/plat-mxc/3ds_debugboard.c b/arch/arm/plat-mxc/3ds_debugboard.c
index 3b48a08c165a..5c10ad05df74 100644
--- a/arch/arm/plat-mxc/3ds_debugboard.c
+++ b/arch/arm/plat-mxc/3ds_debugboard.c
@@ -12,9 +12,11 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
+#include <linux/irqdomain.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
+#include <linux/module.h>
#include <linux/smsc911x.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
@@ -48,26 +50,22 @@
/* CPU ID and Personality ID */
#define MCU_BOARD_ID_REG 0x68
-#define MXC_IRQ_TO_EXPIO(irq) ((irq) - MXC_BOARD_IRQ_START)
-
-#define MXC_EXP_IO_BASE (MXC_BOARD_IRQ_START)
#define MXC_MAX_EXP_IO_LINES 16
/* interrupts like external uart , external ethernet etc*/
-#define EXPIO_INT_ENET (MXC_BOARD_IRQ_START + 0)
-#define EXPIO_INT_XUART_A (MXC_BOARD_IRQ_START + 1)
-#define EXPIO_INT_XUART_B (MXC_BOARD_IRQ_START + 2)
-#define EXPIO_INT_BUTTON_A (MXC_BOARD_IRQ_START + 3)
-#define EXPIO_INT_BUTTON_B (MXC_BOARD_IRQ_START + 4)
+#define EXPIO_INT_ENET 0
+#define EXPIO_INT_XUART_A 1
+#define EXPIO_INT_XUART_B 2
+#define EXPIO_INT_BUTTON_A 3
+#define EXPIO_INT_BUTTON_B 4
static void __iomem *brd_io;
+static struct irq_domain *domain;
static struct resource smsc911x_resources[] = {
{
.flags = IORESOURCE_MEM,
} , {
- .start = EXPIO_INT_ENET,
- .end = EXPIO_INT_ENET,
.flags = IORESOURCE_IRQ,
},
};
@@ -99,11 +97,11 @@ static void mxc_expio_irq_handler(u32 irq, struct irq_desc *desc)
imr_val = __raw_readw(brd_io + INTR_MASK_REG);
int_valid = __raw_readw(brd_io + INTR_STATUS_REG) & ~imr_val;
- expio_irq = MXC_BOARD_IRQ_START;
+ expio_irq = 0;
for (; int_valid != 0; int_valid >>= 1, expio_irq++) {
if ((int_valid & 1) == 0)
continue;
- generic_handle_irq(expio_irq);
+ generic_handle_irq(irq_find_mapping(domain, expio_irq));
}
desc->irq_data.chip->irq_ack(&desc->irq_data);
@@ -117,7 +115,7 @@ static void mxc_expio_irq_handler(u32 irq, struct irq_desc *desc)
static void expio_mask_irq(struct irq_data *d)
{
u16 reg;
- u32 expio = MXC_IRQ_TO_EXPIO(d->irq);
+ u32 expio = d->hwirq;
reg = __raw_readw(brd_io + INTR_MASK_REG);
reg |= (1 << expio);
@@ -126,7 +124,7 @@ static void expio_mask_irq(struct irq_data *d)
static void expio_ack_irq(struct irq_data *d)
{
- u32 expio = MXC_IRQ_TO_EXPIO(d->irq);
+ u32 expio = d->hwirq;
__raw_writew(1 << expio, brd_io + INTR_RESET_REG);
__raw_writew(0, brd_io + INTR_RESET_REG);
@@ -136,7 +134,7 @@ static void expio_ack_irq(struct irq_data *d)
static void expio_unmask_irq(struct irq_data *d)
{
u16 reg;
- u32 expio = MXC_IRQ_TO_EXPIO(d->irq);
+ u32 expio = d->hwirq;
reg = __raw_readw(brd_io + INTR_MASK_REG);
reg &= ~(1 << expio);
@@ -157,6 +155,7 @@ static struct regulator_consumer_supply dummy_supplies[] = {
int __init mxc_expio_init(u32 base, u32 intr_gpio)
{
u32 p_irq = gpio_to_irq(intr_gpio);
+ int irq_base;
int i;
brd_io = ioremap(BOARD_IO_ADDR(base), SZ_4K);
@@ -186,8 +185,15 @@ int __init mxc_expio_init(u32 base, u32 intr_gpio)
__raw_writew(0xFFFF, brd_io + INTR_RESET_REG);
__raw_writew(0, brd_io + INTR_RESET_REG);
__raw_writew(0x1F, brd_io + INTR_MASK_REG);
- for (i = MXC_EXP_IO_BASE;
- i < (MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES); i++) {
+
+ irq_base = irq_alloc_descs(-1, 0, MXC_MAX_EXP_IO_LINES, numa_node_id());
+ WARN_ON(irq_base < 0);
+
+ domain = irq_domain_add_legacy(NULL, MXC_MAX_EXP_IO_LINES, irq_base, 0,
+ &irq_domain_simple_ops, NULL);
+ WARN_ON(!domain);
+
+ for (i = irq_base; i < irq_base + MXC_MAX_EXP_IO_LINES; i++) {
irq_set_chip_and_handler(i, &expio_irq_chip, handle_level_irq);
set_irq_flags(i, IRQF_VALID);
}
@@ -199,6 +205,8 @@ int __init mxc_expio_init(u32 base, u32 intr_gpio)
smsc911x_resources[0].start = LAN9217_BASE_ADDR(base);
smsc911x_resources[0].end = LAN9217_BASE_ADDR(base) + 0x100 - 1;
+ smsc911x_resources[1].start = irq_find_mapping(domain, EXPIO_INT_ENET);
+ smsc911x_resources[1].end = irq_find_mapping(domain, EXPIO_INT_ENET);
platform_device_register(&smsc_lan9217_device);
return 0;