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serial: 8250_uniphier: remove unused "fifo-size" property

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The FIFO size of the UART devices is 64 on almost all UniPhier SoCs
with the exception Pro4TV SoC (MN2WS0235), which used 128 FIFO size.
However, Pro4TV SoC was never upstreamed, and out of production.

So, this property has never been used in a useful way.
Let's remove old unused code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Masahiro Yamada 2018-09-28 11:05:07 +09:00 committed by Greg Kroah-Hartman
parent 9e3eb4eabd
commit 2fd8e45418
2 changed files with 1 additions and 13 deletions
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4
Documentation/devicetree/bindings/serial/uniphier-uart.txt
View File

@ -6,9 +6,6 @@ Required properties:
- interrupts: a single interrupt specifier.
- clocks: phandle to the input clock.
Optional properties:
- fifo-size: the RX/TX FIFO size. Defaults to 64 if not specified.
Example:
aliases {
serial0 = &serial0;
@ -19,5 +16,4 @@ Example:
reg = <0x54006800 0x40>;
interrupts = <0 33 4>;
clocks = <&uart_clk>;
fifo-size = <64>;
};

10
drivers/tty/serial/8250/8250_uniphier.c
View File

@ -12,9 +12,6 @@
#include "8250.h"
/* Most (but not all) of UniPhier UART devices have 64-depth FIFO. */
#define UNIPHIER_UART_DEFAULT_FIFO_SIZE 64
/*
* This hardware is similar to 8250, but its register map is a bit different:
* - MMIO32 (regshift = 2)
@ -185,12 +182,6 @@ static int uniphier_of_serial_setup(struct device *dev, struct uart_port *port,
port->uartclk = clk_get_rate(priv->clk);
/* Check for fifo size */
if (of_property_read_u32(np, "fifo-size", &prop) == 0)
port->fifosize = prop;
else
port->fifosize = UNIPHIER_UART_DEFAULT_FIFO_SIZE;
return 0;
}
@ -241,6 +232,7 @@ static int uniphier_uart_probe(struct platform_device *pdev)
up.port.type = PORT_16550A;
up.port.iotype = UPIO_MEM32;
up.port.fifosize = 64;
up.port.regshift = UNIPHIER_UART_REGSHIFT;
up.port.flags = UPF_FIXED_PORT | UPF_FIXED_TYPE;
up.capabilities = UART_CAP_FIFO;