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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
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The Samsung's UART controller is used for interfacing SoC with serial
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communicaion devices.
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Required properties:
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- compatible: should be one of following:
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- "samsung,exynos4210-uart" - Exynos4210 SoC,
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- "samsung,s3c2410-uart" - compatible with ports present on S3C2410 SoC,
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- "samsung,s3c2412-uart" - compatible with ports present on S3C2412 SoC,
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- "samsung,s3c2440-uart" - compatible with ports present on S3C2440 SoC,
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- "samsung,s3c6400-uart" - compatible with ports present on S3C6400 SoC,
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- "samsung,s5pv210-uart" - compatible with ports present on S5PV210 SoC.
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- reg: base physical address of the controller and length of memory mapped
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region.
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- interrupts: a single interrupt signal to SoC interrupt controller,
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according to interrupt bindings documentation [1].
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- clock-names: input names of clocks used by the controller:
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- "uart" - controller bus clock,
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- "clk_uart_baudN" - Nth baud base clock input (N = 0, 1, ...),
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according to SoC User's Manual (only N = 0 is allowedfor SoCs without
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internal baud clock mux).
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- clocks: phandles and specifiers for all clocks specified in "clock-names"
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property, in the same order, according to clock bindings documentation [2].
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[1] Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
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[2] Documentation/devicetree/bindings/clock/clock-bindings.txt
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Optional properties:
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- samsung,uart-fifosize: The fifo size supported by the UART channel
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Note: Each Samsung UART should have an alias correctly numbered in the
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"aliases" node, according to serialN format, where N is the port number
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(non-negative decimal integer) as specified by User's Manual of respective
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SoC.
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Example:
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aliases {
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serial0 = &uart0;
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serial1 = &uart1;
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serial2 = &uart2;
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};
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Example:
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uart1: serial@7f005400 {
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compatible = "samsung,s3c6400-uart";
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reg = <0x7f005400 0x100>;
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interrupt-parent = <&vic1>;
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interrupts = <6>;
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clock-names = "uart", "clk_uart_baud2",
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"clk_uart_baud3";
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clocks = <&clocks PCLK_UART1>, <&clocks PCLK_UART1>,
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<&clocks SCLK_UART>;
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samsung,uart-fifosize = <16>;
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};
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