diff options
| author | Naveen Krishna Chatradhi <ch.naveen@samsung.com> | 2014-07-14 17:07:16 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-17 18:18:22 -0700 |
| commit | 135f07c3252dc77d0245714d0b413ecc711cd823 (patch) | |
| tree | 4ef8a12ac1a415767e7e4c0a597abf4201076cc3 | |
| parent | b1261c86fe238cc0da3f5dc837a38a0c39f3e7c4 (diff) | |
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: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/devicetree/bindings/serial/samsung_uart.txt | 4 | ||||
| -rw-r--r-- | drivers/tty/serial/samsung.c | 12 |
2 files changed, 13 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.txt b/Documentation/devicetree/bindings/serial/samsung_uart.txt index 85e8ee2a17fc..e85f37ec33f0 100644 --- a/Documentation/devicetree/bindings/serial/samsung_uart.txt +++ b/Documentation/devicetree/bindings/serial/samsung_uart.txt @@ -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>; }; diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 6be852d4df6d..e49a9451976e 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1295,9 +1295,15 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) dev_get_platdata(&pdev->dev) : ourport->drv_data->def_cfg; - ourport->port.fifosize = (ourport->info->fifosize) ? - ourport->info->fifosize : - ourport->drv_data->fifosize[index]; + 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++; |