From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Sat, 13 May 2017 07:28:59 +0000 (+0200)
Subject: serial: exar: Preconfigure xr17v35x MPIOs as output
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7dea8165f1d;p=linux.git

serial: exar: Preconfigure xr17v35x MPIOs as output

This is the safe default for GPIOs with unknown external wiring.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 2a8f00d96e6b1..0a20f7185094b 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -176,13 +176,13 @@ static void setup_gpio(u8 __iomem *p)
 	writeb(0x00, p + UART_EXAR_MPIOLVL_7_0);
 	writeb(0x00, p + UART_EXAR_MPIO3T_7_0);
 	writeb(0x00, p + UART_EXAR_MPIOINV_7_0);
-	writeb(0x00, p + UART_EXAR_MPIOSEL_7_0);
+	writeb(0xff, p + UART_EXAR_MPIOSEL_7_0);
 	writeb(0x00, p + UART_EXAR_MPIOOD_7_0);
 	writeb(0x00, p + UART_EXAR_MPIOINT_15_8);
 	writeb(0x00, p + UART_EXAR_MPIOLVL_15_8);
 	writeb(0x00, p + UART_EXAR_MPIO3T_15_8);
 	writeb(0x00, p + UART_EXAR_MPIOINV_15_8);
-	writeb(0x00, p + UART_EXAR_MPIOSEL_15_8);
+	writeb(0xff, p + UART_EXAR_MPIOSEL_15_8);
 	writeb(0x00, p + UART_EXAR_MPIOOD_15_8);
 }