fsl_rio: Add comments for sRIO registers.

Add some comments to make sRIO registers map better readable.

Signed-off-by: Shaohui Xie <b21989@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index 3017532319c8d0df73ba36e3858c5368c17cccaf..412763672d23faa754e26d5b655cccd21046f4ad 100644 (file)
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -117,44 +117,59 @@ struct rio_atmu_regs {
 };
 
 struct rio_msg_regs {
-       u32 omr;
-       u32 osr;
+       u32 omr;        /* 0xD_3000 - Outbound message 0 mode register */
+       u32 osr;        /* 0xD_3004 - Outbound message 0 status register */
        u32 pad1;
-       u32 odqdpar;
+       u32 odqdpar;    /* 0xD_300C - Outbound message 0 descriptor queue
+                          dequeue pointer address register */
        u32 pad2;
-       u32 osar;
-       u32 odpr;
-       u32 odatr;
-       u32 odcr;
+       u32 osar;       /* 0xD_3014 - Outbound message 0 source address
+                          register */
+       u32 odpr;       /* 0xD_3018 - Outbound message 0 destination port
+                          register */
+       u32 odatr;      /* 0xD_301C - Outbound message 0 destination attributes
+                          Register*/
+       u32 odcr;       /* 0xD_3020 - Outbound message 0 double-word count
+                          register */
        u32 pad3;
-       u32 odqepar;
+       u32 odqepar;    /* 0xD_3028 - Outbound message 0 descriptor queue
+                          enqueue pointer address register */
        u32 pad4[13];
-       u32 imr;
-       u32 isr;
+       u32 imr;        /* 0xD_3060 - Inbound message 0 mode register */
+       u32 isr;        /* 0xD_3064 - Inbound message 0 status register */
        u32 pad5;
-       u32 ifqdpar;
+       u32 ifqdpar;    /* 0xD_306C - Inbound message 0 frame queue dequeue
+                          pointer address register*/
        u32 pad6;
-       u32 ifqepar;
+       u32 ifqepar;    /* 0xD_3074 - Inbound message 0 frame queue enqueue
+                          pointer address register */
        u32 pad7[226];
-       u32 odmr;
-       u32 odsr;
+       u32 odmr;       /* 0xD_3400 - Outbound doorbell mode register */
+       u32 odsr;       /* 0xD_3404 - Outbound doorbell status register */
        u32 res0[4];
-       u32 oddpr;
-       u32 oddatr;
+       u32 oddpr;      /* 0xD_3418 - Outbound doorbell destination port
+                          register */
+       u32 oddatr;     /* 0xD_341c - Outbound doorbell destination attributes
+                          register */
        u32 res1[3];
-       u32 odretcr;
+       u32 odretcr;    /* 0xD_342C - Outbound doorbell retry error threshold
+                          configuration register */
        u32 res2[12];
-       u32 dmr;
-       u32 dsr;
+       u32 dmr;        /* 0xD_3460 - Inbound doorbell mode register */
+       u32 dsr;        /* 0xD_3464 - Inbound doorbell status register */
        u32 pad8;
-       u32 dqdpar;
+       u32 dqdpar;     /* 0xD_346C - Inbound doorbell queue dequeue Pointer
+                          address register */
        u32 pad9;
-       u32 dqepar;
+       u32 dqepar;     /* 0xD_3474 - Inbound doorbell Queue enqueue pointer
+                          address register */
        u32 pad10[26];
-       u32 pwmr;
-       u32 pwsr;
-       u32 epwqbar;
-       u32 pwqbar;
+       u32 pwmr;       /* 0xD_34E0 - Inbound port-write mode register */
+       u32 pwsr;       /* 0xD_34E4 - Inbound port-write status register */
+       u32 epwqbar;    /* 0xD_34E8 - Extended Port-Write Queue Base Address
+                          register */
+       u32 pwqbar;     /* 0xD_34EC - Inbound port-write queue base address
+                          register */
 };
 
 struct rio_tx_desc {