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serial: rsci: Add set_rtrg() callback

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The rtrg variable is populated in sci_init_single() for RZ/T2H. Add
set_rtrg() callback for setting the rtrg value.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/20251129164325.209213-4-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Biju Das 2025-11-29 16:42:59 +00:00 committed by Greg Kroah-Hartman
parent 3a3ab10245
commit b346e5d7db
1 changed files with 17 additions and 0 deletions
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17
drivers/tty/serial/rsci.c
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@ -151,6 +151,22 @@ static void rsci_start_rx(struct uart_port *port)
rsci_serial_out(port, CCR0, ctrl);
}
static int rsci_scif_set_rtrg(struct uart_port *port, int rx_trig)
{
u32 fcr = rsci_serial_in(port, FCR);
if (rx_trig >= port->fifosize)
rx_trig = port->fifosize - 1;
else if (rx_trig < 1)
rx_trig = 0;
fcr &= ~FCR_RTRG4_0;
fcr |= field_prep(FCR_RTRG4_0, rx_trig);
rsci_serial_out(port, FCR, fcr);
return rx_trig;
}
static void rsci_set_termios(struct uart_port *port, struct ktermios *termios,
const struct ktermios *old)
{
@ -454,6 +470,7 @@ static const struct sci_port_ops rsci_port_ops = {
.poll_put_char = rsci_poll_put_char,
.prepare_console_write = rsci_prepare_console_write,
.suspend_regs_size = rsci_suspend_regs_size,
.set_rtrg = rsci_scif_set_rtrg,
.shutdown_complete = rsci_shutdown_complete,
};