ARM: SAMSUNG: Convert irq-uart 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>

1 files changed, 12 insertions, 71 deletions

diff --git a/arch/arm/plat-samsung/irq-uart.c b/arch/arm/plat-samsung/irq-uart.c
index 4d4e571af553..32582c0958e3 100644
--- a/arch/arm/plat-samsung/irq-uart.c
+++ b/arch/arm/plat-samsung/irq-uart.c
@@ -27,60 +27,6 @@
 /* Note, we make use of the fact that the parent IRQs, IRQ_UART[0..3]
  * are consecutive when looking up the interrupt in the demux routines.
  */
-
-static inline void __iomem *s3c_irq_uart_base(struct irq_data *data)
-{
-        struct s3c_uart_irq *uirq = irq_data_get_irq_chip_data(data);
-        return uirq->regs;
-}
-
-static inline unsigned int s3c_irq_uart_bit(unsigned int irq)
-{
-        return irq & 3;
-}
-
-static void s3c_irq_uart_mask(struct irq_data *data)
-{
-        void __iomem *regs = s3c_irq_uart_base(data);
-        unsigned int bit = s3c_irq_uart_bit(data->irq);
-        u32 reg;
-
-        reg = __raw_readl(regs + S3C64XX_UINTM);
-        reg |= (1 << bit);
-        __raw_writel(reg, regs + S3C64XX_UINTM);
-}
-
-static void s3c_irq_uart_maskack(struct irq_data *data)
-{
-        void __iomem *regs = s3c_irq_uart_base(data);
-        unsigned int bit = s3c_irq_uart_bit(data->irq);
-        u32 reg;
-
-        reg = __raw_readl(regs + S3C64XX_UINTM);
-        reg |= (1 << bit);
-        __raw_writel(reg, regs + S3C64XX_UINTM);
-        __raw_writel(1 << bit, regs + S3C64XX_UINTP);
-}
-
-static void s3c_irq_uart_unmask(struct irq_data *data)
-{
-        void __iomem *regs = s3c_irq_uart_base(data);
-        unsigned int bit = s3c_irq_uart_bit(data->irq);
-        u32 reg;
-
-        reg = __raw_readl(regs + S3C64XX_UINTM);
-        reg &= ~(1 << bit);
-        __raw_writel(reg, regs + S3C64XX_UINTM);
-}
-
-static void s3c_irq_uart_ack(struct irq_data *data)
-{
-        void __iomem *regs = s3c_irq_uart_base(data);
-        unsigned int bit = s3c_irq_uart_bit(data->irq);
-
-        __raw_writel(1 << bit, regs + S3C64XX_UINTP);
-}
-
 static void s3c_irq_demux_uart(unsigned int irq, struct irq_desc *desc)
 {
         struct s3c_uart_irq *uirq = desc->irq_data.handler_data;
@@ -97,30 +43,25 @@ static void s3c_irq_demux_uart(unsigned int irq, struct irq_desc *desc)
                 generic_handle_irq(base + 3);
 }
 
-static struct irq_chip s3c_irq_uart = {
-        .name           = "s3c-uart",
-        .irq_mask       = s3c_irq_uart_mask,
-        .irq_unmask     = s3c_irq_uart_unmask,
-        .irq_mask_ack   = s3c_irq_uart_maskack,
-        .irq_ack        = s3c_irq_uart_ack,
-};
-
 static void __init s3c_init_uart_irq(struct s3c_uart_irq *uirq)
 {
         void __iomem *reg_base = uirq->regs;
-        unsigned int irq;
-        int offs;
+        struct irq_chip_generic *gc;
+        struct irq_chip_type *ct;
 
         /* mask all interrupts at the start. */
         __raw_writel(0xf, reg_base + S3C64XX_UINTM);
 
-        for (offs = 0; offs < 3; offs++) {
-                irq = uirq->base_irq + offs;
-
-                irq_set_chip_and_handler(irq, &s3c_irq_uart, handle_level_irq);
-                irq_set_chip_data(irq, uirq);
-                set_irq_flags(irq, IRQF_VALID);
-        }
+        gc = irq_alloc_generic_chip("s3c-uart", 1, uirq->base_irq, reg_base,
+                                    handle_level_irq);
+        ct = gc->chip_types;
+        ct->chip.irq_ack = irq_gc_ack;
+        ct->chip.irq_mask = irq_gc_mask_set_bit;
+        ct->chip.irq_unmask = irq_gc_mask_clr_bit;
+        ct->regs.ack = S3C64XX_UINTP;
+        ct->regs.mask = S3C64XX_UINTM;
+        irq_setup_generic_chip(gc, IRQ_MSK(4), IRQ_GC_INIT_MASK_CACHE,
+                               IRQ_NOREQUEST | IRQ_NOPROBE, 0);
 
         irq_set_handler_data(uirq->parent_irq, uirq);
         irq_set_chained_handler(uirq->parent_irq, s3c_irq_demux_uart);