[PATCH v4 3/7] serial: exar: add optional board_init function

Parker Newman
2024-04-17T20:31:59Z

From: Parker Newman <pnewman@connecttech.com>

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>
---
Changes in v3:
- Renamed board_setup to board_init.
- Changed pci_err to dev_err_probe
- Added note above about checkpatch fixes

Changes in v4:
- Removed checkpatch fixes, they will be in their own patch at the end
- Added pcidev to board_init() args to avoid needing to add to priv

drivers/tty/serial/8250/8250_exar.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 72385c7d2eda..f14f73d250bb 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -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) {
--
2.43.2