From: Noam Camus <[email protected]> Add support for UPIO_MEM32BE in addition to UPIO_MEM32.
For big endian we use 2 new accessors similar to little endian, called dw8250_serial_out32be() and dw8250_serial_in32be(). Signed-off-by: Noam Camus <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> (cherry picked from commit 4625090187768bc776d69dfaa6a1f79b1125debe) Signed-off-by: Tan Jui Nee <[email protected]> --- drivers/tty/serial/8250/8250_dw.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index ffe5e0c..92c4a9b 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -182,6 +182,24 @@ static unsigned int dw8250_serial_in32(struct uart_port *p, int offset) return dw8250_modify_msr(p, offset, value); } +static void dw8250_serial_out32be(struct uart_port *p, int offset, int value) +{ + struct dw8250_data *d = p->private_data; + + iowrite32be(value, p->membase + (offset << p->regshift)); + + if (offset == UART_LCR && !d->uart_16550_compatible) + dw8250_check_lcr(p, value); +} + +static unsigned int dw8250_serial_in32be(struct uart_port *p, int offset) +{ + unsigned int value = ioread32be(p->membase + (offset << p->regshift)); + + return dw8250_modify_msr(p, offset, value); +} + + static int dw8250_handle_irq(struct uart_port *p) { struct dw8250_data *d = p->private_data; @@ -276,6 +294,11 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data) data->skip_autocfg = true; } #endif + if (of_device_is_big_endian(p->dev->of_node)) { + p->iotype = UPIO_MEM32BE; + p->serial_in = dw8250_serial_in32be; + p->serial_out = dw8250_serial_out32be; + } } else if (has_acpi_companion(p->dev)) { p->iotype = UPIO_MEM32; p->regshift = 2; -- 1.9.1 -- _______________________________________________ linux-yocto mailing list [email protected] https://lists.yoctoproject.org/listinfo/linux-yocto
