amd64_edac: Cleanup Dram Configuration registers handling

* Restrict DCT ganged mode check since only Fam10h supports it
* Adjust DRAM type detection for BD since it only supports DDR3
* Remove second and thus unneeded DCLR read in k8_early_channel_count() - we do
  that in read_mc_regs()
* Cleanup comments and remove family names from register macros
* Remove unused defines

There should be no functional change resulting from this patch.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

1 files changed, 7 insertions, 12 deletions

diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h
index ba1818305943..7323f1b493ad 100644
--- a/drivers/edac/amd64_edac.h
+++ b/drivers/edac/amd64_edac.h
@@ -218,27 +218,23 @@
 
 #define DBAM_MAX_VALUE                  11
 
-
-#define F10_DCLR_0                      0x90
-#define F10_DCLR_1                      0x190
+#define DCLR0                           0x90
+#define DCLR1                           0x190
 #define REVE_WIDTH_128                  BIT(16)
 #define F10_WIDTH_128                   BIT(11)
 
-
-#define F10_DCHR_0                      0x94
-#define F10_DCHR_1                      0x194
-
-#define F10_DCHR_FOUR_RANK_DIMM         BIT(18)
+#define DCHR0                           0x94
+#define DCHR1                           0x194
 #define DDR3_MODE                       BIT(8)
-#define F10_DCHR_MblMode                BIT(6)
-
 
 #define F10_DCTL_SEL_LOW                0x110
 #define dct_sel_baseaddr(pvt)           ((pvt->dct_sel_low) & 0xFFFFF800)
 #define dct_sel_interleave_addr(pvt)    (((pvt->dct_sel_low) >> 6) & 0x3)
 #define dct_high_range_enabled(pvt)     (pvt->dct_sel_low & BIT(0))
 #define dct_interleave_enabled(pvt)     (pvt->dct_sel_low & BIT(2))
-#define dct_ganging_enabled(pvt)        (pvt->dct_sel_low & BIT(4))
+
+#define dct_ganging_enabled(pvt)        ((boot_cpu_data.x86 == 0x10) && ((pvt)->dct_sel_low & BIT(4)))
+
 #define dct_data_intlv_enabled(pvt)     (pvt->dct_sel_low & BIT(5))
 #define dct_dram_enabled(pvt)           (pvt->dct_sel_low & BIT(8))
 #define dct_memory_cleared(pvt)         (pvt->dct_sel_low & BIT(10))
@@ -262,7 +258,6 @@
 
 #define K8_NBSL                         0x48
 
-
 /* Family F10h: Normalized Extended Error Codes */
 #define F10_NBSL_EXT_ERR_RES            0x0
 #define F10_NBSL_EXT_ERR_ECC            0x8