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@xxxxxxxxxxx>
Cc: gregkh@xxxxxxxxxxxxxxxxxxx
---
.../devicetree/bindings/serial/samsung_uart.txt | 4 ++++
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 85e8ee2..e85f37e 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 6be852d..e49a945 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++;
--
1.7.9.5
--
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