[PATCH v4 1/3] memory: omap-gpmc: allow shared wait pins

["B. Niedermayr" <benedikt.niedermayr@siemens.com>]

From: Benedikt Niedermayr <benedikt.niedermayr@siemens.com>

Newer kernels refuse to probe when using the same wait pin for
different chipselect regions.

But this may be a usecase when connecting for example FPGA or ASIC
modules to the gpmc, which only got one wait pin installed.

Signed-off-by: Benedikt Niedermayr <benedikt.niedermayr@siemens.com>
---
 drivers/memory/omap-gpmc.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index d9bf1c2ac319..e3674a15b934 100644
--- a/drivers/memory/omap-gpmc.c
+++ b/drivers/memory/omap-gpmc.c
@@ -2221,9 +2221,13 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
 							 GPIO_ACTIVE_HIGH,
 							 GPIOD_IN);
 		if (IS_ERR(waitpin_desc)) {
-			dev_err(&pdev->dev, "invalid wait-pin: %d\n", wait_pin);
 			ret = PTR_ERR(waitpin_desc);
-			goto err;
+			if (ret == -EBUSY) {
+				dev_info(&pdev->dev, "shared wait-pin: %d\n", wait_pin);
+			} else {
+				dev_err(&pdev->dev, "invalid wait-pin: %d\n", wait_pin);
+				goto err;
+			}
 		}
 	}
 
-- 
2.34.1