[PATCH v2.1 2/2] smiapp: Support the "rotation" property

[Sakari Ailus]

Use the "rotation" property to tell that the sensor is mounted upside
down. This reverses the behaviour of the VFLIP and HFLIP controls as well
as the pixel order.

Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
---
since v2:

- Fix the property name in the commit message

 .../devicetree/bindings/media/i2c/nokia,smia.txt         |  2 ++
 drivers/media/i2c/smiapp/smiapp-core.c                   | 16 ++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/nokia,smia.txt 
b/Documentation/devicetree/bindings/media/i2c/nokia,smia.txt
index 33f10a94c381..6f509657470e 100644
--- a/Documentation/devicetree/bindings/media/i2c/nokia,smia.txt
+++ b/Documentation/devicetree/bindings/media/i2c/nokia,smia.txt
@@ -29,6 +29,8 @@ Optional properties
 - reset-gpios: XSHUTDOWN GPIO
 - flash-leds: See ../video-interfaces.txt
 - lens-focus: See ../video-interfaces.txt
+- rotation: Integer property; valid values are 0 (sensor mounted upright)
+           and 180 (sensor mounted upside down).
 
 
 Endpoint node mandatory properties
diff --git a/drivers/media/i2c/smiapp/smiapp-core.c 
b/drivers/media/i2c/smiapp/smiapp-core.c
index e1f8208581aa..32286df6ab43 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2764,6 +2764,7 @@ static struct smiapp_hwconfig *smiapp_get_hwconfig(struct 
device *dev)
        struct v4l2_fwnode_endpoint *bus_cfg;
        struct fwnode_handle *ep;
        struct fwnode_handle *fwnode = dev_fwnode(dev);
+       u32 rotation;
        int i;
        int rval;
 
@@ -2800,6 +2801,21 @@ static struct smiapp_hwconfig 
*smiapp_get_hwconfig(struct device *dev)
 
        dev_dbg(dev, "lanes %u\n", hwcfg->lanes);
 
+       rval = fwnode_property_read_u32(fwnode, "upside-down", &rotation);
+       if (!rval) {
+               switch (rotation) {
+               case 180:
+                       hwcfg->module_board_orient =
+                               SMIAPP_MODULE_BOARD_ORIENT_180;
+                       /* Fall through */
+               case 0:
+                       break;
+               default:
+                       dev_err(dev, "invalid rotation %u\n", rotation);
+                       goto out_err;
+               }
+       }
+
        /* NVM size is not mandatory */
        fwnode_property_read_u32(fwnode, "nokia,nvm-size", &hwcfg->nvm_size);
 
-- 
2.11.0