linux-toradex.git/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt, branch master

dt-bindings: phy: rockchip-emmc-phy: Convert to dtschema

2024-07-02T13:24:01+00:00

Convert txt bindings of Rockchip EMMC PHY to dtschema to allow
for validation.

Signed-off-by: Shresth Prasad 
Reviewed-by: Krzysztof Kozlowski 
Link: https://lore.kernel.org/r/20240620212806.3011-2-shresthprasad7@gmail.com
Signed-off-by: Vinod Koul

devicetree: phy: rockchip-emmc optional add vendor prefix

2021-01-13T11:58:24+00:00

Update the documentation and add the vendor prefix to the optional
properties referred in vendor-prefixes.yaml.
Follow up with
commit 8b5c2b45b8f0a ("phy: rockchip: set pulldown for strobe line in dts")
commit a8cef928276bb ("phy: rockchip-emmc: output tap delay dt property")

Signed-off-by: Chris Ruehl 
Reviewed-by: Rob Herring 
Link: https://lore.kernel.org/r/20201215014409.905-2-chris.ruehl@gtsys.com.hk
Signed-off-by: Vinod Koul

devicetree: phy: rockchip-emmc add output-tapdelay-select

2020-12-05T08:10:48+00:00

Update the rockchip-emmc-phy.txt and add the u32 property
'output-tapdelay-select'. This allow to set the otapdlysec register.

Tested with our customized rk3399 board to tune eMMC.

Signed-off-by: Chris Ruehl 
Link: https://lore.kernel.org/r/20201202082507.3536-3-chris.ruehl@gtsys.com.hk
Signed-off-by: Vinod Koul

devicetree: phy: rockchip-emmc: pulldown property

2020-12-05T08:07:58+00:00

Update the documentation and add the bool property
enable-strobe-pulldown used to enable the internal pull-down for the
strobe line.

Signed-off-by: Chris Ruehl 
Link: https://lore.kernel.org/r/20201129054416.3980-3-chris.ruehl@gtsys.com.hk
Signed-off-by: Vinod Koul

dt-bindings: phy: Add a new property drive-impedance-ohm for RK's emmc PHY

2019-04-17T08:42:59+00:00

This patch documents the new proprty drive-impedance-ohm for
Rockchip's eMMC PHY node.

Signed-off-by: Christoph Muellner 
Signed-off-by: Philipp Tomsich 
Signed-off-by: Kishon Vijay Abraham I

Documentation: phy: Let the rockchip eMMC PHY get an exported card clock

2016-07-25T08:34:19+00:00

As of an earlier change in this series ("Documentation: mmc:
sdhci-of-arasan: Add ability to export card clock") the SDHCI driver
used on Rockchip SoCs can now expose its clock.  Let's now specify that
the PHY can use it.

Letting the PHY get access to this clock means it can adjust
phyctrl_frqsel field appropriately.  Although the Rockchip PHY appears
slightly different than the reference Arasan one, you can see that the
Arasan datasheet [1] had it defined as:
  Select the frequency range of DLL operation:
  3b'000 => 200MHz to 170 MHz
  3b'001 => 170MHz to 140 MHz
  3b'010 => 140MHz to 110 MHz
  3b'011 => 110MHz to 80MHz
  3b'100 => 80MHz to 50 MHz
  3b'101 => 275Mhz to 250MHz
  3b'110 => 250MHz to 225MHz
  3b'111 => 225MHz to 200MHz

On the Rockchip version of the PHY we have less granularity but the idea
is the same.

[1]: https://arasan.com/wp-content/media/eMMC-5-1-Total-Solution_Rev-1-3.pdf

Signed-off-by: Douglas Anderson 
Acked-by: Kishon Vijay Abraham I 
Acked-by: Rob Herring 
Reviewed-by: Heiko Stuebner 
Signed-off-by: Ulf Hansson

phy: rockchip-emmc: adapt binding to specifiy register offset and length

2016-04-13T13:03:05+00:00

The emmc-phy occupies a contiguous set of 8 registers inside the general
register files, so the reg property should specify this.

Signed-off-by: Heiko Stuebner 
Acked-by: Rob Herring 
Signed-off-by: Kishon Vijay Abraham I

phy: rockchip-emmc: should be a child device of the GRF

2016-04-13T13:03:05+00:00

The emmc-phy is fully enclosed in the general register files (GRF).
Therefore as seen from the device-tree it shouldn't be a separate platform-
device but instead a sub-device of the GRF - using the simply-mfd mechanism.

The driver entered the kernel in the current merge-window, so we can still
adapt the binding without needing a fallback, as the binding hasn't been
released with a full kernel yet.

Signed-off-by: Heiko Stuebner 
Acked-by: Rob Herring 
Reviewed-by: Shawn Lin 
Signed-off-by: Kishon Vijay Abraham I

Documentation: bindings: add dt documentation for Rockchip eMMC PHY

2016-03-01T11:43:50+00:00

This patch adds a binding that describes the Rockchip eMMC PHYs
found on Rockchip SoCs eMMC interface.

Signed-off-by: Shawn Lin 
Signed-off-by: Kishon Vijay Abraham I