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Commit 135f07c3 authored by Naveen Krishna Chatradhi's avatar Naveen Krishna Chatradhi Committed by Greg Kroah-Hartman
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serial: samsung: get fifosize via device tree 



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: default avatarNaveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: default avatarTomasz Figa <t.figa@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b1261c86

Documentation/devicetree/bindings/serial/samsung_uart.txt

+4 −0
Original line number Diff line number Diff line
@@ -29,6 +29,9 @@ Required properties: 
[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
@@ -51,4 +54,5 @@ Example: 
				"clk_uart_baud3";

		clocks = <&clocks PCLK_UART1>, <&clocks PCLK_UART1>,

				<&clocks SCLK_UART>;

		samsung,uart-fifosize = <16>;

	};

drivers/tty/serial/samsung.c

+9 −3
Original line number Diff line number Diff line
@@ -1295,9 +1295,15 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) 
			dev_get_platdata(&pdev->dev) :

			ourport->drv_data->def_cfg;



	if (pdev->dev.of_node)

		of_property_read_u32(pdev->dev.of_node,

			"samsung,uart-fifosize", &ourport->port.fifosize);



	if (!ourport->port.fifosize) {

		ourport->port.fifosize = (ourport->info->fifosize) ?

			ourport->info->fifosize :

			ourport->drv_data->fifosize[index];

	}



	probe_index++;