1 * Synopsis Designware Mobile Storage Host Controller
3 The Synopsis designware mobile storage host controller is used to interface
4 a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
5 differences between the core mmc properties described by mmc.txt and the
6 properties used by the Synopsis Designware Mobile Storage Host Controller.
10 * compatible: should be
11 - snps,dw-mshc: for controllers compliant with synopsis dw-mshc.
12 * #address-cells: should be 1.
13 * #size-cells: should be 0.
15 # Slots: The slot specific information are contained within child-nodes with
16 each child-node representing a supported slot. There should be atleast one
17 child node representing a card slot. The name of the child node representing
18 the slot is recommended to be slot@n where n is the unique number of the slot
19 connnected to the controller. The following are optional properties which
20 can be included in the slot child node.
22 * reg: specifies the physical slot number. The valid values of this
23 property is 0 to (num-slots -1), where num-slots is the value
24 specified by the num-slots property.
26 * bus-width: as documented in mmc core bindings.
28 * wp-gpios: specifies the write protect gpio line. The format of the
29 gpio specifier depends on the gpio controller. If the write-protect
30 line is not available, this property is optional.
34 * num-slots: specifies the number of slots supported by the controller.
35 The number of physical slots actually used could be equal or less than the
36 value specified by num-slots. If this property is not specified, the value
37 of num-slot property is assumed to be 1.
39 * fifo-depth: The maximum size of the tx/rx fifo's. If this property is not
40 specified, the default value of the fifo size is determined from the
43 * card-detect-delay: Delay in milli-seconds before detecting card after card
44 insert event. The default value is 0.
46 * supports-highspeed: Enables support for high speed cards (upto 50MHz)
48 * broken-cd: as documented in mmc core bindings.
52 - All the MSHC controller nodes should be represented in the aliases node using
53 the following format 'mshc{n}' where n is a unique number for the alias.
57 The MSHC controller node can be split into two portions, SoC specific and
58 board specific portions as listed below.
61 compatible = "snps,dw-mshc";
62 reg = <0x12200000 0x1000>;
63 interrupts = <0 75 0>;
73 card-detect-delay = <200>;