irqchip: renesas-irqc: Add more register documentation

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Link: https://lkml.kernel.org/r/1426704961-27322-2-git-send-email-geert+renesas@glider.be
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

1 files changed, 15 insertions, 5 deletions

diff --git a/drivers/irqchip/irq-renesas-irqc.c b/drivers/irqchip/irq-renesas-irqc.c
index 384e6ed61d7c..44fe04a8da95 100644
--- a/drivers/irqchip/irq-renesas-irqc.c
+++ b/drivers/irqchip/irq-renesas-irqc.c
@@ -30,14 +30,24 @@
 #include <linux/module.h>
 #include <linux/platform_data/irq-renesas-irqc.h>
 
-#define IRQC_IRQ_MAX 32 /* maximum 32 interrupts per driver instance */
+#define IRQC_IRQ_MAX    32      /* maximum 32 interrupts per driver instance */
 
-#define IRQC_REQ_STS 0x00
-#define IRQC_EN_STS 0x04
-#define IRQC_EN_SET 0x08
+#define IRQC_REQ_STS    0x00    /* Interrupt Request Status Register */
+#define IRQC_EN_STS     0x04    /* Interrupt Enable Status Register */
+#define IRQC_EN_SET     0x08    /* Interrupt Enable Set Register */
 #define IRQC_INT_CPU_BASE(n) (0x000 + ((n) * 0x10))
-#define DETECT_STATUS 0x100
+                                /* SYS-CPU vs. RT-CPU */
+#define DETECT_STATUS   0x100   /* IRQn Detect Status Register */
+#define MONITOR         0x104   /* IRQn Signal Level Monitor Register */
+#define HLVL_STS        0x108   /* IRQn High Level Detect Status Register */
+#define LLVL_STS        0x10c   /* IRQn Low Level Detect Status Register */
+#define S_R_EDGE_STS    0x110   /* IRQn Sync Rising Edge Detect Status Reg. */
+#define S_F_EDGE_STS    0x114   /* IRQn Sync Falling Edge Detect Status Reg. */
+#define A_R_EDGE_STS    0x118   /* IRQn Async Rising Edge Detect Status Reg. */
+#define A_F_EDGE_STS    0x11c   /* IRQn Async Falling Edge Detect Status Reg. */
+#define CHTEN_STS       0x120   /* Chattering Reduction Status Register */
 #define IRQC_CONFIG(n) (0x180 + ((n) * 0x04))
+                                /* IRQn Configuration Register */
 
 struct irqc_irq {
         int hw_irq;