tty: serial: qcom_geni_serial: Use iowrite32_rep to write to FIFO

Use iowrite32_rep to write to the hardware FIFO so that the code does
not have to worry about the system endianness.

Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 3e9de6c780d3..b0758606b676 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -600,14 +600,15 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport)
         remaining = chunk;
         for (i = 0; i < chunk; ) {
                 unsigned int tx_bytes;
-                unsigned int buf = 0;
+                u8 buf[sizeof(u32)];
                 int c;
 
+                memset(buf, 0, ARRAY_SIZE(buf));
                 tx_bytes = min_t(size_t, remaining, port->tx_bytes_pw);
                 for (c = 0; c < tx_bytes ; c++)
-                        buf |= (xmit->buf[tail + c] << (c * BITS_PER_BYTE));
+                        buf[c] = xmit->buf[tail + c];
 
-                writel_relaxed(buf, uport->membase + SE_GENI_TX_FIFOn);
+                iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1);
 
                 i += tx_bytes;
                 tail = (tail + tx_bytes) & (UART_XMIT_SIZE - 1);