Re: [PATCH 01/28] OMAP3: PM: GPMC context save/restore

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Kevin Hilman had written, on 10/05/2009 12:29 PM, the following:
Nishanth Menon <menon.nishanth@xxxxxxxxx> writes:

+		gpmc_context.cs_context[i].is_valid =
+				(gpmc_cs_read_reg(i, GPMC_CS_CONFIG7))
+							& GPMC_CONFIG7_CSVALID;
+		if (gpmc_context.cs_context[i].is_valid) {
+			gpmc_context.cs_context[i].config1 =
+				gpmc_cs_read_reg(i, GPMC_CS_CONFIG1);
+			gpmc_context.cs_context[i].config2 =
+				gpmc_cs_read_reg(i, GPMC_CS_CONFIG2);
+			gpmc_context.cs_context[i].config3 =
+				gpmc_cs_read_reg(i, GPMC_CS_CONFIG3);
+			gpmc_context.cs_context[i].config4 =
+				gpmc_cs_read_reg(i, GPMC_CS_CONFIG4);
+			gpmc_context.cs_context[i].config5 =
+				gpmc_cs_read_reg(i, GPMC_CS_CONFIG5);
+			gpmc_context.cs_context[i].config6 =
+				gpmc_cs_read_reg(i, GPMC_CS_CONFIG6);
+			gpmc_context.cs_context[i].config7 =
+				gpmc_cs_read_reg(i, GPMC_CS_CONFIG7);
+		}
here is a theoretical bug:
1: GPMC, 1, 2, 3 4 5 configured 6 7 not configured.
2. Save and restore 1: save and restore variables which are static will
contain 1-5 and not 6&7
3. next I disable 2,3
3. save will save 1,4,5 BUT my variable will contain 1,2,3,4,5 ->
restore will rename 2,3 (which I did not intend)..

Not sure I follow the problem here.  What do you mean by "rename".
The saved context will have values for 2 and 3, but the is_valid
flag will not be set, so they shouldn't be used.
My bad.. s/rename/enable/ for 2,3 ->definitely not something I would like to see.


Rajendra was the original author of these, so maybe I'm not fully
understanding here, but disabling a GPMC looks to me like it
will disable both the save and restore.

Yes, anyone else has an opinion, please pop them here.

--
Regards,
Nishanth Menon
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