[PATCH v5 0/3] mmc: renesas_sdhi: add eMMC HS400 mode support

From: Simon Horman <horms+renesas@verge.net.au>
To: Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Ulf Hansson <ulf.hansson@linaro.org>
Cc: Magnus Damm <magnus.damm@gmail.com>,
	linux-mmc@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
	Simon Horman <horms+renesas@verge.net.au>
Subject: [PATCH v5 0/3] mmc: renesas_sdhi: add eMMC HS400 mode support
Date: Mon, 18 Jun 2018 14:57:48 +0200	[thread overview]
Message-ID: <20180618125751.27615-1-horms+renesas@verge.net.au> (raw)

Hi,

this patch-set provides SDHI driver support for eMMC HS400.

Based on mmc-v4.18-rc1

Dependencies for applying these patches:
* none

Dependencies to test eMMC HS400:
* [PATCH] clk: renesas: rcar-gen3: Fix SD divider setting
* [PATCH v2] arm64: dts: salvator-common: Enable HS400 of SDHI2

To assist testing and review this patch and the above mentioned
dependencies, which are necessary and sufficient to enable HS400 on
R-Car {H3,M3-W,M3-N} / Salvator-{X,XS}.

https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas.git topic/hs400-v5

Changes since v4:
* Refactor host tuning operations as suggested by Ulf
* Differeniate between 4 tap and 8 tap support for HS400
* Support HS400 with R-Car M3-N (r8a77965)

Changes since v3:
* As a follow-up to discussion with Ulf and Wolfram I have proposed
  two new HS400 tuning host operations. These are provided, and explained,
  in "mmc: core: more fine-grained hooks for HS400 tuning".

  The following driver patches have been updated to use these new operations.

  And "mmc: tmio: add eMMC HS400 mode support" proposes a minor cleanup
  to make it a little cleaner to add the proposed new host operations to
  the MMC core.

Changes since v2:
* Consolidate disable_scc and reset_hs400_mode into reset_hs400_tuning
  callback
* Reuse renesas_sdhi_reset_hs400_mode() in renesas_sdhi_hw_reset()
* Factor out renesas_sdhi_reset_scc()

Masaharu Hayakawa (2):
  mmc: tmio: add eMMC HS400 mode support
  mmc: renesas_sdhi: add eMMC HS400 mode support

Simon Horman (1):
  mmc: core: more fine-grained hooks for HS400 tuning

 drivers/mmc/core/mmc.c                        |  10 ++
 drivers/mmc/host/renesas_sdhi_core.c          | 127 +++++++++++++++++++++-----
 drivers/mmc/host/renesas_sdhi_internal_dmac.c |  20 +++-
 drivers/mmc/host/renesas_sdhi_sys_dmac.c      |  17 +++-
 drivers/mmc/host/tmio_mmc.h                   |   6 ++
 drivers/mmc/host/tmio_mmc_core.c              |  47 +++++++++-
 include/linux/mfd/tmio.h                      |   3 +
 include/linux/mmc/host.h                      |   7 ++
 8 files changed, 209 insertions(+), 28 deletions(-)

-- 
2.11.0