From 9474ae7f02be8de5caa5a2aebf7dced3a2932784 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Tue, 25 Oct 2016 15:16:26 -0500 Subject: [PATCH] UPSTREAM: mainboard/google/reef: clarify memory part number details Explain the reasoning for the part_num strings used in the memory SKU table explaining the necessity of keeping mosys in sync with the strings used. It's possible that actual part numbers could change as the higher speed material gets cheaper, for example. BUG=chrome-os-partner:58966 BRANCH=None TEST=None Signed-off-by: Aaron Durbin Reviewed-on: https://review.coreboot.org/17129 Reviewed-by: Duncan Laurie Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh Change-Id: If895e52791dc56e283261b3438106116b8b2ea05 Reviewed-on: https://chromium-review.googlesource.com/404676 Commit-Ready: Furquan Shaikh Tested-by: Furquan Shaikh Reviewed-by: Aaron Durbin --- .../google/reef/variants/baseboard/memory.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/src/mainboard/google/reef/variants/baseboard/memory.c b/src/mainboard/google/reef/variants/baseboard/memory.c index c4667f390e..23cb631833 100644 --- a/src/mainboard/google/reef/variants/baseboard/memory.c +++ b/src/mainboard/google/reef/variants/baseboard/memory.c @@ -62,9 +62,15 @@ const struct lpddr4_swizzle_cfg baseboard_lpddr4_swizzle = { }, }; +/* + * The strings in the part_num field aren't necessarily the exact part + * numbers used in all the designs. The reason is that the mosys userland + * tool uses these strings for dumping more information. Different speed bins + * could change in future systems, but the strings still need to match. + */ static const struct lpddr4_sku skus[] = { /* - * K4F6E304HB-MGCJ - both logical channels While the parts + * K4F6E304HB-MG - both logical channels While the parts * are listed at 16Gb there are 2 ranks per channel so indicate * the deneisty as 8Gb per rank. */ @@ -76,7 +82,7 @@ static const struct lpddr4_sku skus[] = { .ch1_dual_rank = 1, .part_num = "K4F6E304HB-MGCJ", }, - /* K4F8E304HB-MGCJ - both logical channels */ + /* K4F8E304HB-MG - both logical channels */ [1] = { .speed = LP4_SPEED_2400, .ch0_rank_density = LP4_8Gb_DENSITY, @@ -84,7 +90,7 @@ static const struct lpddr4_sku skus[] = { .part_num = "K4F8E304HB-MGCJ", }, /* - * MT53B512M32D2NP-062WT:C - both logical channels. While the parts + * MT53B512M32D2NP - both logical channels. While the parts * are listed at 16Gb there are 2 ranks per channel so indicate * the deneisty as 8Gb per rank. */ @@ -97,7 +103,7 @@ static const struct lpddr4_sku skus[] = { .part_num = "MT53B512M32D2NP", .disable_periodic_retraining = 1, }, - /* MT53B256M32D1NP-062 WT:C - both logical channels */ + /* MT53B256M32D1NP - both logical channels */ [3] = { .speed = LP4_SPEED_2400, .ch0_rank_density = LP4_8Gb_DENSITY, @@ -106,7 +112,7 @@ static const struct lpddr4_sku skus[] = { .disable_periodic_retraining = 1, }, /* - * H9HCNNNBPUMLHR-NLE - both logical channels. While the parts + * H9HCNNNBPUMLHR - both logical channels. While the parts * are listed at 16Gb there are 2 ranks per channel so indicate the * density as 8Gb per rank. */ @@ -118,7 +124,7 @@ static const struct lpddr4_sku skus[] = { .ch1_dual_rank = 1, .part_num = "H9HCNNNBPUMLHR", }, - /* H9HCNNN8KUMLHR-NLE - both logical channels */ + /* H9HCNNN8KUMLHR - both logical channels */ [5] = { .speed = LP4_SPEED_2400, .ch0_rank_density = LP4_8Gb_DENSITY,