From: Wolfram Sang <wsa@xxxxxxxxxxxxx> 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
