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serial: exar: add optional board_init function

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Add an optional "board_init()" function pointer to struct exar8250_board
which is called once during probe prior to setting up the ports. It will
be used in subsequent patches of this series.

Signed-off-by: Parker Newman <pnewman@connecttech.com>
Link: https://lore.kernel.org/r/0e72a3154114c733283ff273bc1e31456ee101f4.1713382717.git.pnewman@connecttech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Parker Newman 2024-04-17 16:31:25 -04:00 committed by Greg Kroah-Hartman
parent 477f6ee694
commit 393b520a99
1 changed files with 12 additions and 1 deletions
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13
drivers/tty/serial/8250/8250_exar.c
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@ -177,12 +177,14 @@ struct exar8250_platform {
* 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_init: 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 (*board_init)(struct exar8250 *priv, struct pci_dev *pcidev);
int (*setup)(struct exar8250 *, struct pci_dev *,
struct uart_8250_port *, int);
void (*exit)(struct pci_dev *pcidev);
@ -773,6 +775,15 @@ exar_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
if (rc)
return rc;
if (board->board_init) {
rc = board->board_init(priv, pcidev);
if (rc) {
dev_err_probe(&pcidev->dev, rc,
"failed to init serial board\n");
return rc;
}
}
for (i = 0; i < nr_ports && i < maxnr; i++) {
rc = board->setup(priv, pcidev, &uart, i);
if (rc) {