[PATCH 4/7] omap3isp: Return -EPROBE_DEFER if the required regulators can't be obtained

[Sakari Ailus]

From: Pavel Machek <pa...@ucw.cz>

If regulator returns -EPROBE_DEFER, we need to return it too, so that
omap3isp will be re-probed when regulator is ready.

Signed-off-by: Pavel Machek <pa...@ucw.cz>
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
---
 drivers/media/platform/omap3isp/isp.c     | 3 ++-
 drivers/media/platform/omap3isp/ispccp2.c | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/omap3isp/isp.c 
b/drivers/media/platform/omap3isp/isp.c
index 80ed5a5f862a..4e6ba7f90e35 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -1880,7 +1880,8 @@ static int isp_initialize_modules(struct isp_device *isp)
 
        ret = omap3isp_ccp2_init(isp);
        if (ret < 0) {
-               dev_err(isp->dev, "CCP2 initialization failed\n");
+               if (ret != -EPROBE_DEFER)
+                       dev_err(isp->dev, "CCP2 initialization failed\n");
                goto error_ccp2;
        }
 
diff --git a/drivers/media/platform/omap3isp/ispccp2.c 
b/drivers/media/platform/omap3isp/ispccp2.c
index 4f8fd0c00748..47210b102bcb 100644
--- a/drivers/media/platform/omap3isp/ispccp2.c
+++ b/drivers/media/platform/omap3isp/ispccp2.c
@@ -1140,6 +1140,11 @@ int omap3isp_ccp2_init(struct isp_device *isp)
        if (isp->revision == ISP_REVISION_2_0) {
                ccp2->vdds_csib = devm_regulator_get(isp->dev, "vdds_csib");
                if (IS_ERR(ccp2->vdds_csib)) {
+                       if (PTR_ERR(ccp2->vdds_csib) == -EPROBE_DEFER) {
+                               dev_dbg(isp->dev,
+                                       "Can't get regulator vdds_csib, 
deferring probing\n");
+                               return -EPROBE_DEFER;
+                       }
                        dev_dbg(isp->dev,
                                "Could not get regulator vdds_csib\n");
                        ccp2->vdds_csib = NULL;
-- 
2.11.0