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Sascha Hauer 3d705d14fe mmc: implement Driver Stage Register handling 
Some eMMC and SD cards implement a DSR register that allows to tune
raise/fall times and drive strength of the CMD and DATA outputs.
The values to use depend on the card in use and the host.
It might be needed to reduce the drive strength to prevent voltage peaks
above the host's specification.

Implement a 'dsr' devicetree property that allows to specify the value
to set the DSR to. For non-dt setups the new members of mmc_host can be
set by board code.

This patch was initially authored by Sascha Hauer. It contains
improvements authored by Markus Niebel and Uwe Kleine-König.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2014-09-09 13:59:07 +02:00
..
arasan,sdhci.txt mmc: arasan: Add driver for Arasan SDHCI 2014-01-13 12:48:34 -05:00
atmel-hsmci.txt mmc: atmel-mci: document clock properties 2014-02-07 17:20:38 +01:00
brcm,bcm2835-sdhci.txt mmc: add BCM2835 driver 2013-02-11 13:28:49 -05:00
davinci_mmc.txt mmc: davinci_mmc: add DT support 2013-04-04 16:55:05 +05:30
exynos-dw-mshc.txt mmc: dw_mmc: modify the dt-binding for removing slot-node and supports-highspeed 2014-08-11 11:48:39 +02:00
fsl-esdhc.txt mmc: core: parse voltage from device-tree 2013-08-26 11:31:40 -04:00
fsl-imx-esdhc.txt mmc: sdhci-esdhc-imx: add delay line setting support 2013-10-21 15:58:13 -04:00
fsl-imx-mmc.txt mmc: mxcmmc: DT support 2013-04-12 15:12:34 -04:00
k3-dw-mshc.txt mmc: dw_mmc: modify the dt-binding for removing slot-node and supports-highspeed 2014-08-11 11:48:39 +02:00
kona-sdhci.txt Documentation: dt: kona-sdhci: Add clocks property 2013-12-22 23:45:32 -08:00
mmc-spi-slot.txt mmc: dt: Deduplicate binding docs by referencing mmc.txt 2012-07-10 23:04:06 -04:00
mmc.txt mmc: implement Driver Stage Register handling 2014-09-09 13:59:07 +02:00
mmci.txt mmc: mmci: Mark the DT bindings for highspeed mode as deprecated 2014-05-12 12:52:42 +02:00
moxa,moxart-mmc.txt mmc: moxart: Add MOXA ART SD/MMC driver 2014-05-12 18:05:16 -04:00
mxs-mmc.txt mmc: mxs-mmc: move to use generic DMA helper 2013-04-04 21:22:44 +08:00
nvidia,tegra20-sdhci.txt ARM: tegra: document reset properties in DT bindings 2013-12-11 16:42:13 -07:00
orion-sdio.txt mmc: mvsdio: implement a Device Tree binding 2013-02-11 13:28:54 -05:00
pxa-mmc.txt mmc: pxa-mci: add DT bindings 2012-09-04 13:58:12 -04:00
renesas,mmcif.txt mmc: sh_mmcif: Document DT bindings 2014-07-26 11:38:19 +02:00
rockchip-dw-mshc.txt mmc: dw_mmc: add support for RK3288 2014-09-09 13:58:59 +02:00
samsung-sdhci.txt doc: spelling error changes 2014-05-05 15:32:05 +02:00
sdhci-dove.txt mmc: sdhci-dove: DT support for sdhci-dove 2012-09-04 13:58:15 -04:00
sdhci-msm.txt mmc: sdhci-msm: Fix the binding example 2014-07-26 11:08:01 +02:00
sdhci-pxa.txt mmc: sdhci-pxav3: add support for the Armada 38x SDHCI controller 2014-03-29 12:18:19 -04:00
sdhci-sirf.txt mmc: sdhci-sirf: add mmc host sdhci-pltfm based driver for SiRF SoCs 2013-03-22 13:29:46 -04:00
sdhci-spear.txt mmc: sdhci-spear: Add clk_{un}prepare() support 2012-10-07 17:41:45 -04:00
sdhci-st.txt mmc: sdhci-st: ST Microelectronics SDHCI binding documentation. 2014-07-10 09:11:32 +02:00
socfpga-dw-mshc.txt Revert "dts: socfpga: Add support for SD/MMC on the SOCFPGA platform" 2014-03-17 09:04:57 -04:00
sunxi-mmc.txt mmc: sunxi: Add driver for SD/MMC hosts found on Allwinner sunxi SoCs 2014-06-03 16:52:34 -07:00
synopsys-dw-mshc.txt mmc: dw_mmc: modify the dt-binding for removing slot-node and supports-highspeed 2014-08-11 11:48:39 +02:00
ti-omap-hsmmc.txt mmc: omap_hsmmc: Pin remux workaround to support SDIO interrupt on AM335x 2014-07-09 11:26:06 +02:00
ti-omap.txt mmc: omap: Fix I2C dependency and make driver usable with device tree 2013-11-26 15:51:16 -08:00
tmio_mmc.txt mmc: tmio-mmc: Add renesas, sdhi-r8a7791 to binding documentation 2014-07-09 14:54:39 +02:00
usdhi6rol0.txt mmc: add a driver for the Renesas usdhi6rol0 SD/SDIO host controller 2014-06-02 21:24:45 -04:00
vt8500-sdmmc.txt mmc: SD/MMC Host Controller for Wondermedia WM8505/WM8650 2012-12-06 13:54:50 -05:00