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authorLinus Torvalds <torvalds@linux-foundation.org>2020-08-05 13:02:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-05 13:02:45 -0700
commit441977979a78bffe51b13932d353919b1fb20c14 (patch)
tree6b38f64721824ef3f35ad8489613cbd7b4abd7db /Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
parent1d8ce0e09301920454234a4096dee96a670a8e32 (diff)
parent6f1188b4ac7577c29a4883d5618fa2231396fe9d (diff)
Merge tag 'devicetree-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull Devicetree updates from Rob Herring: - Improve device links cycle detection and breaking. Add more bindings for device link dependencies. - Refactor parsing 'no-map' in __reserved_mem_alloc_size() - Improve DT unittest 'ranges' and 'dma-ranges' test case to check differing cell sizes - Various http to https link conversions - Add a schema check to prevent 'syscon' from being used by itself without a more specific compatible - A bunch more DT binding conversions to schema * tag 'devicetree-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (55 commits) of: reserved-memory: remove duplicated call to of_get_flat_dt_prop() for no-map node of: unittest: Use bigger address cells to catch parser regressions dt-bindings: memory-controllers: Convert mmdc to json-schema dt-bindings: mtd: Convert imx nand to json-schema dt-bindings: mtd: Convert gpmi nand to json-schema dt-bindings: iio: io-channel-mux: Fix compatible string in example code of: property: Add device link support for pinctrl-0 through pinctrl-8 of: property: Add device link support for multiple DT bindings dt-bindings: phy: ti: phy-gmii-sel: convert bindings to json-schema dt-bindings: mux: mux.h: drop a duplicated word dt-bindings: misc: Convert olpc,xo1.75-ec to json-schema dt-bindings: aspeed-lpc: Replace HTTP links with HTTPS ones dt-bindings: drm/bridge: Replace HTTP links with HTTPS ones drm/tilcdc: Replace HTTP links with HTTPS ones dt-bindings: iommu: renesas,ipmmu-vmsa: Add r8a774e1 support dt-bindings: fpga: Replace HTTP links with HTTPS ones dt-bindings: virtio: Replace HTTP links with HTTPS ones dt-bindings: media: imx274: Add optional input clock and supplies dt-bindings: i2c-gpio: Use 'deprecated' keyword on deprecated properties dt-bindings: interrupt-controller: Fix typos in loongson,liointc.yaml ...
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-* Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
-
-The Enhanced Secure Digital Host Controller on Freescale i.MX family
-provides an interface for MMC, SD, and SDIO types of memory cards.
-
-This file documents differences between the core properties described
-by mmc.txt and the properties used by the sdhci-esdhc-imx driver.
-
-Required properties:
-- compatible : Should be "fsl,<chip>-esdhc", the supported chips include
- "fsl,imx25-esdhc"
- "fsl,imx35-esdhc"
- "fsl,imx51-esdhc"
- "fsl,imx53-esdhc"
- "fsl,imx6q-usdhc"
- "fsl,imx6sl-usdhc"
- "fsl,imx6sx-usdhc"
- "fsl,imx6ull-usdhc"
- "fsl,imx7d-usdhc"
- "fsl,imx7ulp-usdhc"
- "fsl,imx8mq-usdhc"
- "fsl,imx8mm-usdhc"
- "fsl,imx8mn-usdhc"
- "fsl,imx8mp-usdhc"
- "fsl,imx8qm-usdhc"
- "fsl,imx8qxp-usdhc"
-
-Optional properties:
-- fsl,wp-controller : Indicate to use controller internal write protection
-- fsl,delay-line : Specify the number of delay cells for override mode.
- This is used to set the clock delay for DLL(Delay Line) on override mode
- to select a proper data sampling window in case the clock quality is not good
- due to signal path is too long on the board. Please refer to eSDHC/uSDHC
- chapter, DLL (Delay Line) section in RM for details.
-- voltage-ranges : Specify the voltage range in case there are software
- transparent level shifters on the outputs of the controller. Two cells are
- required, first cell specifies minimum slot voltage (mV), second cell
- specifies maximum slot voltage (mV). Several ranges could be specified.
-- fsl,tuning-start-tap: Specify the start dealy cell point when send first CMD19
- in tuning procedure.
-- fsl,tuning-step: Specify the increasing delay cell steps in tuning procedure.
- The uSDHC use one delay cell as default increasing step to do tuning process.
- This property allows user to change the tuning step to more than one delay
- cells which is useful for some special boards or cards when the default
- tuning step can't find the proper delay window within limited tuning retries.
-- fsl,strobe-dll-delay-target: Specify the strobe dll control slave delay target.
- This delay target programming host controller loopback read clock, and this
- property allows user to change the delay target for the strobe input read clock.
- If not use this property, driver default set the delay target to value 7.
- Only eMMC HS400 mode need to take care of this property.
-
-Examples:
-
-esdhc@70004000 {
- compatible = "fsl,imx51-esdhc";
- reg = <0x70004000 0x4000>;
- interrupts = <1>;
- fsl,wp-controller;
-};
-
-esdhc@70008000 {
- compatible = "fsl,imx51-esdhc";
- reg = <0x70008000 0x4000>;
- interrupts = <2>;
- cd-gpios = <&gpio1 6 0>; /* GPIO1_6 */
- wp-gpios = <&gpio1 5 0>; /* GPIO1_5 */
-};