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net: phy: dp83867: Add device tree bindings and documentation 

Add the device tree bindings and the accompanying documentation
for the TI DP83867 Giga bit ethernet phy driver.

The original document was from:
    [commit 2a10154abcb75ad0d7b6bfea6210ac743ec60897 from the Linux kernel]

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
Tested-by: Mugunthan V N <mugunthanvnm@ti.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Dan Murphy 2016-05-02 15:45:58 -05:00 committed by Joe Hershberger
parent 20671a9896
commit c7ba7bdc9d
2 changed files with 60 additions and 0 deletions
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doc/device-tree-bindings/net/ti,dp83867.txt Normal file
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* Texas Instruments - dp83867 Giga bit ethernet phy
Required properties:
- reg - The ID number for the phy, usually a small integer
- ti,rx-internal-delay - RGMII Recieve Clock Delay - see dt-bindings/net/ti-dp83867.h
for applicable values
- ti,tx-internal-delay - RGMII Transmit Clock Delay - see dt-bindings/net/ti-dp83867.h
for applicable values
- ti,fifo-depth - Transmitt FIFO depth- see dt-bindings/net/ti-dp83867.h
for applicable values
Default child nodes are standard Ethernet PHY device
nodes as described in doc/devicetree/bindings/net/ethernet.txt
Example:
ethernet-phy@0 {
reg = <0>;
ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_25_NS>;
ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_75_NS>;
ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
};
Datasheet can be found:
http://www.ti.com/product/DP83867IR/datasheet

35
include/dt-bindings/net/ti-dp83867.h Normal file
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/*
* TI DP83867 PHY drivers
*
* SPDX-License-Identifier: GPL-2.0
*
*/
#ifndef _DT_BINDINGS_TI_DP83867_H
#define _DT_BINDINGS_TI_DP83867_H
/* PHY CTRL bits */
#define DP83867_PHYCR_FIFO_DEPTH_3_B_NIB 0x00
#define DP83867_PHYCR_FIFO_DEPTH_4_B_NIB 0x01
#define DP83867_PHYCR_FIFO_DEPTH_6_B_NIB 0x02
#define DP83867_PHYCR_FIFO_DEPTH_8_B_NIB 0x03
/* RGMIIDCTL internal delay for rx and tx */
#define DP83867_RGMIIDCTL_250_PS 0x0
#define DP83867_RGMIIDCTL_500_PS 0x1
#define DP83867_RGMIIDCTL_750_PS 0x2
#define DP83867_RGMIIDCTL_1_NS 0x3
#define DP83867_RGMIIDCTL_1_25_NS 0x4
#define DP83867_RGMIIDCTL_1_50_NS 0x5
#define DP83867_RGMIIDCTL_1_75_NS 0x6
#define DP83867_RGMIIDCTL_2_00_NS 0x7
#define DP83867_RGMIIDCTL_2_25_NS 0x8
#define DP83867_RGMIIDCTL_2_50_NS 0x9
#define DP83867_RGMIIDCTL_2_75_NS 0xa
#define DP83867_RGMIIDCTL_3_00_NS 0xb
#define DP83867_RGMIIDCTL_3_25_NS 0xc
#define DP83867_RGMIIDCTL_3_50_NS 0xd
#define DP83867_RGMIIDCTL_3_75_NS 0xe
#define DP83867_RGMIIDCTL_4_00_NS 0xf
#endif