target/linux/ramips/patches-3.14/0025-MIPS-ralink-allow-loading-irq-registers-from-the-dev.patch

   1 From b1cc9a15f6ead8dbd849257e42d69a5799fb7597 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Wed, 6 Aug 2014 18:24:36 +0200
   4 Subject: [PATCH 25/57] MIPS: ralink: allow loading irq registers from the
   5  devicetree
   6
   7 Signed-off-by: John Crispin <blogic@openwrt.org>
   8 ---
   9  arch/mips/ralink/irq.c |   33 +++++++++++++++++++++++----------
  10  1 file changed, 23 insertions(+), 10 deletions(-)
  11
  12 diff --git a/arch/mips/ralink/irq.c b/arch/mips/ralink/irq.c
  13 index 781b3d1..82c3146 100644
  14 --- a/arch/mips/ralink/irq.c
  15 +++ b/arch/mips/ralink/irq.c
  16 @@ -20,14 +20,6 @@
  17
  18  #include "common.h"
  19
  20 -/* INTC register offsets */
  21 -#define INTC_REG_STATUS0       0x00
  22 -#define INTC_REG_STATUS1       0x04
  23 -#define INTC_REG_TYPE          0x20
  24 -#define INTC_REG_RAW_STATUS    0x30
  25 -#define INTC_REG_ENABLE                0x34
  26 -#define INTC_REG_DISABLE       0x38
  27 -
  28  #define INTC_INT_GLOBAL                BIT(31)
  29
  30  #define RALINK_CPU_IRQ_INTC    (MIPS_CPU_IRQ_BASE + 2)
  31 @@ -44,16 +36,34 @@
  32
  33  #define RALINK_INTC_IRQ_PERFC   (RALINK_INTC_IRQ_BASE + 9)
  34
  35 +enum rt_intc_regs_enum {
  36 +       INTC_REG_STATUS0 = 0,
  37 +       INTC_REG_STATUS1,
  38 +       INTC_REG_TYPE,
  39 +       INTC_REG_RAW_STATUS,
  40 +       INTC_REG_ENABLE,
  41 +       INTC_REG_DISABLE,
  42 +};
  43 +
  44 +static u32 rt_intc_regs[] = {
  45 +       [INTC_REG_STATUS0] = 0x00,
  46 +       [INTC_REG_STATUS1] = 0x04,
  47 +       [INTC_REG_TYPE] = 0x20,
  48 +       [INTC_REG_RAW_STATUS] = 0x30,
  49 +       [INTC_REG_ENABLE] = 0x34,
  50 +       [INTC_REG_DISABLE] = 0x38,
  51 +};
  52 +
  53  static void __iomem *rt_intc_membase;
  54
  55  static inline void rt_intc_w32(u32 val, unsigned reg)
  56  {
  57 -       __raw_writel(val, rt_intc_membase + reg);
  58 +       __raw_writel(val, rt_intc_membase + rt_intc_regs[reg]);
  59  }
  60
  61  static inline u32 rt_intc_r32(unsigned reg)
  62  {
  63 -       return __raw_readl(rt_intc_membase + reg);
  64 +       return __raw_readl(rt_intc_membase + rt_intc_regs[reg]);
  65  }
  66
  67  static void ralink_intc_irq_unmask(struct irq_data *d)
  68 @@ -134,6 +144,9 @@ static int __init intc_of_init(struct device_node *node,
  69         struct irq_domain *domain;
  70         int irq;
  71
  72 +       if (!of_property_read_u32_array(node, "ralink,intc-registers", rt_intc_regs, 6))
  73 +               pr_info("intc: using register map from devicetree\n");
  74 +
  75         irq = irq_of_parse_and_map(node, 0);
  76         if (!irq)
  77                 panic("Failed to get INTC IRQ");
  78 --
  79 1.7.10.4
  80