mtd: lpc32xx_slc: Make probe() return -EPROBE_DEFER if necessary
Via of_get_named_gpio(), wp_gpio can become -EPROBE_DEFER which now makes
probe() return -EPROBE_DEFER as well to wait until the gpio controller is
probed before trying to probe lpc32xx_slc again.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/nand/lpc32xx_slc.c b/drivers/mtd/nand/lpc32xx_slc.c
index 1166650..1719387 100644
--- a/drivers/mtd/nand/lpc32xx_slc.c
+++ b/drivers/mtd/nand/lpc32xx_slc.c
@@ -821,6 +821,8 @@
dev_err(&pdev->dev, "Missing platform data\n");
return -ENOENT;
}
+ if (host->ncfg->wp_gpio == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
if (gpio_is_valid(host->ncfg->wp_gpio) &&
gpio_request(host->ncfg->wp_gpio, "NAND WP")) {
dev_err(&pdev->dev, "GPIO not available\n");