irqchip: spear_shirq: Precalculate status mask

Calculate the status mask at compile time, not at runtime.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20140619212713.496614337@linutronix.de
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/irqchip/spear-shirq.c b/drivers/irqchip/spear-shirq.c
index 874950c014be..fc57c35a20b4 100644
--- a/drivers/irqchip/spear-shirq.c
+++ b/drivers/irqchip/spear-shirq.c
@@ -49,6 +49,7 @@ struct shirq_regs {
  *
  * base:        Base register address
  * regs:        Register configuration for shared irq block
+ * mask:        Mask to apply to the status register
  * virq_base:   Base virtual interrupt number
  * nr_irqs:     Number of interrupts handled by this block
  * offset:      Bit offset of the first interrupt
@@ -57,6 +58,7 @@ struct shirq_regs {
 struct spear_shirq {
         void __iomem            *base;
         struct shirq_regs       regs;
+        u32                     mask;
         u32                     virq_base;
         u32                     nr_irqs;
         u32                     offset;
@@ -72,6 +74,7 @@ static DEFINE_SPINLOCK(lock);
 static struct spear_shirq spear300_shirq_ras1 = {
         .offset         = 0,
         .nr_irqs        = 9,
+        .mask           = ((0x1 << 9) - 1) << 0,
         .regs = {
                 .enb_reg = SPEAR300_INT_ENB_MASK_REG,
                 .status_reg = SPEAR300_INT_STS_MASK_REG,
@@ -89,6 +92,7 @@ static struct spear_shirq *spear300_shirq_blocks[] = {
 static struct spear_shirq spear310_shirq_ras1 = {
         .offset         = 0,
         .nr_irqs        = 8,
+        .mask           = ((0x1 << 8) - 1) << 0,
         .regs = {
                 .enb_reg = -1,
                 .status_reg = SPEAR310_INT_STS_MASK_REG,
@@ -99,6 +103,7 @@ static struct spear_shirq spear310_shirq_ras1 = {
 static struct spear_shirq spear310_shirq_ras2 = {
         .offset         = 8,
         .nr_irqs        = 5,
+        .mask           = ((0x1 << 5) - 1) << 8,
         .regs = {
                 .enb_reg = -1,
                 .status_reg = SPEAR310_INT_STS_MASK_REG,
@@ -109,6 +114,7 @@ static struct spear_shirq spear310_shirq_ras2 = {
 static struct spear_shirq spear310_shirq_ras3 = {
         .offset         = 13,
         .nr_irqs        = 1,
+        .mask           = ((0x1 << 1) - 1) << 13,
         .regs = {
                 .enb_reg = -1,
                 .status_reg = SPEAR310_INT_STS_MASK_REG,
@@ -119,6 +125,7 @@ static struct spear_shirq spear310_shirq_ras3 = {
 static struct spear_shirq spear310_shirq_intrcomm_ras = {
         .offset         = 14,
         .nr_irqs        = 3,
+        .mask           = ((0x1 << 3) - 1) << 14,
         .regs = {
                 .enb_reg = -1,
                 .status_reg = SPEAR310_INT_STS_MASK_REG,
@@ -141,6 +148,7 @@ static struct spear_shirq *spear310_shirq_blocks[] = {
 static struct spear_shirq spear320_shirq_ras3 = {
         .offset         = 0,
         .nr_irqs        = 7,
+        .mask           = ((0x1 << 7) - 1) << 0,
         .disabled       = 1,
         .regs = {
                 .enb_reg = SPEAR320_INT_ENB_MASK_REG,
@@ -154,6 +162,7 @@ static struct spear_shirq spear320_shirq_ras3 = {
 static struct spear_shirq spear320_shirq_ras1 = {
         .offset         = 7,
         .nr_irqs        = 3,
+        .mask           = ((0x1 << 3) - 1) << 7,
         .regs = {
                 .enb_reg = -1,
                 .status_reg = SPEAR320_INT_STS_MASK_REG,
@@ -165,6 +174,7 @@ static struct spear_shirq spear320_shirq_ras1 = {
 static struct spear_shirq spear320_shirq_ras2 = {
         .offset         = 10,
         .nr_irqs        = 1,
+        .mask           = ((0x1 << 1) - 1) << 10,
         .regs = {
                 .enb_reg = -1,
                 .status_reg = SPEAR320_INT_STS_MASK_REG,
@@ -176,6 +186,7 @@ static struct spear_shirq spear320_shirq_ras2 = {
 static struct spear_shirq spear320_shirq_intrcomm_ras = {
         .offset         = 11,
         .nr_irqs        = 11,
+        .mask           = ((0x1 << 11) - 1) << 11,
         .regs = {
                 .enb_reg = -1,
                 .status_reg = SPEAR320_INT_STS_MASK_REG,
@@ -239,7 +250,7 @@ static void shirq_handler(unsigned irq, struct irq_desc *desc)
 
         chip->irq_ack(idata);
 
-        mask = ((0x1 << shirq->nr_irqs) - 1) << shirq->offset;
+        mask = shirq->mask;
         while ((val = readl(shirq->base + shirq->regs.status_reg) &
                                 mask)) {