From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-mmc@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
Wolfram Sang <wsa@the-dreams.de>
Subject: [PATCH v3 0/2] mmc: renesas_sdhi: avoid bad TAPs for Gen3
Date: Thu, 23 Apr 2020 15:04:30 +0200 [thread overview]
Message-ID: <20200423130432.9990-1-wsa+renesas@sang-engineering.com> (raw)
From: Wolfram Sang <wsa@the-dreams.de>
Here is a series which avoids using TAPs on R-Car Gen3 SoCs which are
bad to use according to HW engineers. The patch was originally for the
BSP (Thanks, Saito-san) and has been upported for the upstream driver.
Before we can apply this, we need to add some mising information for
R-Car M3-W ES1.[23].
Patches have been tested on Renesas Salvator-XS boards with R-Car H3
ES2.0 (changing from TAP3 to TAP4 here) and R-Car M3-N (changing from
TAP7 to TAP0 here).
A branch can be found here:
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/sdhi/new_manual_calib
It is based on current mmc/next + "[PATCH] mmc: renesas_sdhi: shorten
types after refactorization"
One implementation detail: For now, I kept using a generic naming for
the quirks, e.g. "sdhi_quirks_bad_taps2367". It is possible that we need
to rename/add ones later which are SoC bound, e.g. "sdhi_quirks_m3w_30".
Especially when we add manual calibration somewhen. But for now, the
generic approach seems better to me, so I sticked to it.
Looking forward to further comments and/or testing.
Happy hacking,
Wolfram
Takeshi Saito (1):
mmc: renesas_sdhi: Avoid bad TAP in HS400
Wolfram Sang (1):
mmc: renesas_sdhi: handle M3-W ES1.2 and 1.3 revisions
drivers/mmc/host/renesas_sdhi.h | 1 +
drivers/mmc/host/renesas_sdhi_core.c | 61 ++++++++++++++++++++++++----
2 files changed, 54 insertions(+), 8 deletions(-)
--
2.20.1
next reply other threads:[~2020-04-23 13:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-23 13:04 Wolfram Sang [this message]
2020-04-23 13:04 ` [PATCH v3 1/2] mmc: renesas_sdhi: handle M3-W ES1.2 and 1.3 revisions Wolfram Sang
2020-04-23 13:04 ` [PATCH v3 2/2] mmc: renesas_sdhi: Avoid bad TAP in HS400 Wolfram Sang
2020-05-05 11:32 ` [PATCH v3 0/2] mmc: renesas_sdhi: avoid bad TAPs for Gen3 Ulf Hansson
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