linux-kernel - [PATCH 0/3] mmc: sunxi: Support eMMC DDR modes

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Date:	Sat, 30 Jan 2016 01:21:45 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Ulf Hansson <ulf.hansson@...aro.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Chen-Yu Tsai <wens@...e.org>, Hans de Goede <hdegoede@...hat.com>,
	linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: [PATCH 0/3] mmc: sunxi: Support eMMC DDR modes

Hi everyone,

This was "mmc: sunxi: Support vqmmc regulator and eMMC DDR modes". vqmmc
support and DT patches were merged even though it was an RFC series, to
my suprise.

These are the remaining patches that add eMMC HS-DDR support to sunxi.

Patch 1 adds timing delays for MMC_DDR52 mode.

Patch 2 adds support for 8 bit eMMC DDR52 mode. Under this mode, the
controller must run at twice the card clock, and different timing delays
are needed.

Patch 3 enables eMMC HS-DDR for sunxi-mmc.

Changes since RFC:

  - Dropped patches that are merged

  - Dropped "mmc: sunxi: Block signal voltage switching (CMD11)".
    According to Ulf, the mmc core won't send this command unless the UHS
    capabilities are set. We don't.

  - Increased f_max to 52 MHz. Clock rate range for 50 MHz timing delay
    also increased to match. See patch 1.

Regards
ChenYu

Chen-Yu Tsai (3):
  mmc: sunxi: Support MMC_DDR52 timing modes
  mmc: sunxi: Support 8 bit eMMC DDR transfer modes
  mmc: sunxi: Enable eMMC HS-DDR (MMC_CAP_1_8V_DDR) support

 drivers/mmc/host/sunxi-mmc.c | 42 ++++++++++++++++++++++++++++++++----------
 1 file changed, 32 insertions(+), 10 deletions(-)

-- 
2.7.0