[PATCH v2 4/7] serial: exar: add optional board_setup function

parker
2024-04-11T20:26:03Z

From: Parker Newman <pnewman@connecttech.com>

Adds an optional "board_setup" function pointer to struct
exar8250_board. This gets called once during probe prior to setting up
the ports.

Signed-off-by: Parker Newman <pnewman@connecttech.com>
---
drivers/tty/serial/8250/8250_exar.c | 23 +++++++++++++++++------
1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 9915a99cb7c6..b30f3855652a 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -143,7 +143,7 @@
*
* MPIO Port Function
* ---- ---- --------
- * 0 2 Mode bit 0
+ * 0 2 Mode bit 0
* 1 2 Mode bit 1
* 2 2 Terminate bus
* 3 - <reserved>
@@ -179,22 +179,24 @@ struct exar8250_platform {
int (*rs485_config)(struct uart_port *port, struct ktermios *termios,
struct serial_rs485 *rs485);
const struct serial_rs485 *rs485_supported;
- int (*register_gpio)(struct pci_dev *, struct uart_8250_port *);
- void (*unregister_gpio)(struct uart_8250_port *);
+ int (*register_gpio)(struct pci_dev *pcidev, struct uart_8250_port *port);
+ void (*unregister_gpio)(struct uart_8250_port *port);
};

/**
* struct exar8250_board - board information
* @num_ports: number of serial ports
* @reg_shift: describes UART register mapping in PCI memory
- * @setup: quirk run at ->probe() stage
+ * @board_setup: quirk run once at ->probe() stage before setting up ports
+ * @setup: quirk run at ->probe() stage for each port
* @exit: quirk run at ->remove() stage
*/
struct exar8250_board {
unsigned int num_ports;
unsigned int reg_shift;
- int (*setup)(struct exar8250 *, struct pci_dev *,
- struct uart_8250_port *, int);
+ int (*board_setup)(struct exar8250 *priv);
+ int (*setup)(struct exar8250 *priv, struct pci_dev *pcidev,
+ struct uart_8250_port *port, int idx);
void (*exit)(struct pci_dev *pcidev);
};

@@ -966,6 +968,15 @@ exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
if (rc)
return rc;

+ if (board->board_setup) {
+ rc = board->board_setup(priv);
+ if (rc) {
+ pci_err(pcidev,
+ "failed to setup serial board: %d\n", rc);
+ return rc;
+ }
+ }
+
for (i = 0; i < nr_ports && i < maxnr; i++) {
rc = board->setup(priv, pcidev, &uart, i);
if (rc) {
--
2.43.2