mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-02 18:46:41 +07:00
135f07c325
UART modules on some SoCs only differ in the fifosize of each UART channel. Its useless to duplicate the drv_data structure or create a compatible name for such a change. We can get fifosize via the device tree nodes (not mandating it). Also updates the documentation. Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Reviewed-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
59 lines
2.1 KiB
Plaintext
59 lines
2.1 KiB
Plaintext
* Samsung's UART Controller
|
|
|
|
The Samsung's UART controller is used for interfacing SoC with serial
|
|
communicaion devices.
|
|
|
|
Required properties:
|
|
- 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: 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
|
|
|
|
Optional properties:
|
|
- samsung,uart-fifosize: The fifo size supported by the UART channel
|
|
|
|
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>;
|
|
samsung,uart-fifosize = <16>;
|
|
};
|