diff options
| author | Biju Das <biju.das.jz@bp.renesas.com> | 2025-11-29 16:42:59 +0000 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 07:20:39 -0500 |
| commit | c867becab6fc21932b25d45d94509d49da50e2c2 (patch) | |
| tree | e2ed0ee8d3260459d59e5540363c928960ab6a40 /drivers/tty | |
| parent | d3b5bc6d6b138d20a057fec07ee4967e8e48c2d7 (diff) | |
serial: rsci: Add set_rtrg() callback
[ Upstream commit b346e5d7dbf6696176417923c49838a1beb1d785 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/rsci.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/tty/serial/rsci.c b/drivers/tty/serial/rsci.c index b3c48dc1e07d..0533a4bb1d03 100644 --- a/drivers/tty/serial/rsci.c +++ b/drivers/tty/serial/rsci.c @@ -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, }; |