ARM: SAMSUNG: Convert irq-vic-timer to generic irq chip

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

2 files changed, 27 insertions, 44 deletions

diff --git a/arch/arm/plat-samsung/include/plat/irq-vic-timer.h b/arch/arm/plat-samsung/include/plat/irq-vic-timer.h
index a90b53431b5b..5b9c42fd32d7 100644
--- a/arch/arm/plat-samsung/include/plat/irq-vic-timer.h
+++ b/arch/arm/plat-samsung/include/plat/irq-vic-timer.h
@@ -10,4 +10,4 @@
  * published by the Free Software Foundation.
 */
 
-extern void s3c_init_vic_timer_irq(unsigned int vic, unsigned int timer);
+extern void s3c_init_vic_timer_irq(unsigned int num, unsigned int timer_irq);
diff --git a/arch/arm/plat-samsung/irq-vic-timer.c b/arch/arm/plat-samsung/irq-vic-timer.c
index d6ad66ab9290..a607546ddbd0 100644
--- a/arch/arm/plat-samsung/irq-vic-timer.c
+++ b/arch/arm/plat-samsung/irq-vic-timer.c
@@ -28,60 +28,43 @@ static void s3c_irq_demux_vic_timer(unsigned int irq, struct irq_desc *desc)
 }
 
 /* We assume the IRQ_TIMER0..IRQ_TIMER4 range is continuous. */
-
-static void s3c_irq_timer_mask(struct irq_data *data)
-{
-        u32 reg = __raw_readl(S3C64XX_TINT_CSTAT);
-        u32 mask = (u32)data->chip_data;
-
-        reg &= 0x1f;  /* mask out pending interrupts */
-        reg &= ~mask;
-        __raw_writel(reg, S3C64XX_TINT_CSTAT);
-}
-
-static void s3c_irq_timer_unmask(struct irq_data *data)
+static void s3c_irq_timer_ack(struct irq_data *d)
 {
-        u32 reg = __raw_readl(S3C64XX_TINT_CSTAT);
-        u32 mask = (u32)data->chip_data;
+        struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+        u32 mask = (1 << 5) << (d->irq - gc->irq_base);
 
-        reg &= 0x1f;  /* mask out pending interrupts */
-        reg |= mask;
-        __raw_writel(reg, S3C64XX_TINT_CSTAT);
+        irq_reg_writel(mask | gc->mask_cache, gc->reg_base);
 }
 
-static void s3c_irq_timer_ack(struct irq_data *data)
-{
-        u32 reg = __raw_readl(S3C64XX_TINT_CSTAT);
-        u32 mask = (u32)data->chip_data;
-
-        reg &= 0x1f;
-        reg |= mask << 5;
-        __raw_writel(reg, S3C64XX_TINT_CSTAT);
-}
-
-static struct irq_chip s3c_irq_timer = {
-        .name           = "s3c-timer",
-        .irq_mask       = s3c_irq_timer_mask,
-        .irq_unmask     = s3c_irq_timer_unmask,
-        .irq_ack        = s3c_irq_timer_ack,
-};
-
 /**
  * s3c_init_vic_timer_irq() - initialise timer irq chanined off VIC.\
- * @parent_irq: The parent IRQ on the VIC for the timer.
- * @timer_irq: The IRQ to be used for the timer.
+ * @num: Number of timers to initialize
+ * @timer_irq: Base IRQ number to be used for the timers.
  *
  * Register the necessary IRQ chaining and support for the timer IRQs
  * chained of the VIC.
  */
-void __init s3c_init_vic_timer_irq(unsigned int parent_irq,
-                                   unsigned int timer_irq)
+void __init s3c_init_vic_timer_irq(unsigned int num, unsigned int timer_irq)
 {
+        unsigned int pirq[5] = { IRQ_TIMER0_VIC, IRQ_TIMER1_VIC, IRQ_TIMER2_VIC,
+                                 IRQ_TIMER3_VIC, IRQ_TIMER4_VIC };
+        struct irq_chip_generic *s3c_tgc;
+        struct irq_chip_type *ct;
+        unsigned int i;
 
-        irq_set_chained_handler(parent_irq, s3c_irq_demux_vic_timer);
-        irq_set_handler_data(parent_irq, (void *)timer_irq);
+        s3c_tgc = irq_alloc_generic_chip("s3c-timer", 1, timer_irq,
+                                         S3C64XX_TINT_CSTAT, handle_level_irq);
+        ct = s3c_tgc->chip_types;
+        ct->chip.irq_mask = irq_gc_mask_clr_bit;
+        ct->chip.irq_unmask = irq_gc_mask_set_bit;
+        ct->chip.irq_ack = s3c_irq_timer_ack;
+        irq_setup_generic_chip(s3c_tgc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,
+                               IRQ_NOREQUEST | IRQ_NOPROBE, 0);
+        /* Clear the upper bits of the mask_cache*/
+        s3c_tgc->mask_cache &= 0x1f;
 
-        irq_set_chip_and_handler(timer_irq, &s3c_irq_timer, handle_level_irq);
-        irq_set_chip_data(timer_irq, (void *)(1 << (timer_irq - IRQ_TIMER0)));
-        set_irq_flags(timer_irq, IRQF_VALID);
+        for (i = 0; i < num; i++, timer_irq++) {
+                irq_set_chained_handler(pirq[i], s3c_irq_demux_vic_timer);
+                irq_set_handler_data(pirq[i], (void *)timer_irq);
+        }
 }