hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Documentation: devicetree: Update samsung UART bindings 

The primary purpose of this patch is to add information about (now
required) aliases of UART ports. However the documentation currently is
heavily outdated and so this patch also takes care of this.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomasz Figa 2014-06-26 13:24:33 +02:00 committed by Greg Kroah-Hartman
parent 44acd26063
commit 9b58bec76e
1 changed files with 46 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
Documentation/devicetree/bindings/serial/samsung_uart.txt
View File

@ -1,14 +1,54 @@
* Samsung's UART Controller
The Samsung's UART controller is used for interfacing SoC with serial communicaion
devices.
The Samsung's UART controller is used for interfacing SoC with serial
communicaion devices.
Required properties:
- compatible: should be
- "samsung,exynos4210-uart", for UART's compatible with Exynos4210 uart ports.
- compatible: should be one of following:
- "samsung,exynos4210-uart" - Exynos4210 SoC,
- "samsung,s3c2410-uart" - compatible with ports present on S3C2410 SoC,
- "samsung,s3c2412-uart" - compatible with ports present on S3C2412 SoC,
- "samsung,s3c2440-uart" - compatible with ports present on S3C2440 SoC,
- "samsung,s3c6400-uart" - compatible with ports present on S3C6400 SoC,
- "samsung,s5pv210-uart" - compatible with ports present on S5PV210 SoC.
- reg: base physical address of the controller and length of memory mapped
region.
- interrupts: interrupt number to the cpu. The interrupt specifier format depends
on the interrupt controller parent.
- interrupts: a single interrupt signal to SoC interrupt controller,
according to interrupt bindings documentation [1].
- clock-names: input names of clocks used by the controller:
- "uart" - controller bus clock,
- "clk_uart_baudN" - Nth baud base clock input (N = 0, 1, ...),
according to SoC User's Manual (only N = 0 is allowedfor SoCs without
internal baud clock mux).
- clocks: phandles and specifiers for all clocks specified in "clock-names"
property, in the same order, according to clock bindings documentation [2].
[1] Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
[2] Documentation/devicetree/bindings/clock/clock-bindings.txt
Note: Each Samsung UART should have an alias correctly numbered in the
"aliases" node, according to serialN format, where N is the port number
(non-negative decimal integer) as specified by User's Manual of respective
SoC.
Example:
aliases {
serial0 = &uart0;
serial1 = &uart1;
serial2 = &uart2;
};
Example:
uart1: serial@7f005400 {
compatible = "samsung,s3c6400-uart";
reg = <0x7f005400 0x100>;
interrupt-parent = <&vic1>;
interrupts = <6>;
clock-names = "uart", "clk_uart_baud2",
"clk_uart_baud3";
clocks = <&clocks PCLK_UART1>, <&clocks PCLK_UART1>,
<&clocks SCLK_UART>;
};