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serial: 8250_uniphier: fix dl_read and dl_write functions

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The register offset must be shifted by regshift, otherwise the
baudrate is not set.  I missed the issue probably because the
divisor register was already set by the boot loader.

Fixes: 1a8d2903cb ("serial: 8250_uniphier: add UniPhier serial driver")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Masahiro Yamada
2015-10-19 13:37:55 +09:00
committed by Greg Kroah-Hartman
parent 527e9316f8
commit 7be047e035
1 changed files with 6 additions and 2 deletions
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drivers/tty/serial/8250/8250_uniphier.c
+6 -2
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@@ -115,12 +115,16 @@ static void uniphier_serial_out(struct uart_port *p, int offset, int value)
*/
static int uniphier_serial_dl_read(struct uart_8250_port *up)
{
return readl(up->port.membase + UNIPHIER_UART_DLR);
int offset = UNIPHIER_UART_DLR << up->port.regshift;
return readl(up->port.membase + offset);
}
static void uniphier_serial_dl_write(struct uart_8250_port *up, int value)
{
writel(value, up->port.membase + UNIPHIER_UART_DLR);
int offset = UNIPHIER_UART_DLR << up->port.regshift;
writel(value, up->port.membase + offset);
}
static int uniphier_of_serial_setup(struct device *dev, struct uart_port *port,