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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>
This commit is contained in:
Karthikeyan Ramasubramanian 2018-05-03 14:14:38 -06:00 committed by Greg Kroah-Hartman
parent 7fb5b88001
commit 69736b57df
1 changed files with 4 additions and 3 deletions
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7
drivers/tty/serial/qcom_geni_serial.c
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@ -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);