media: synopsys: csi2rx: use devm_reset_control_get_optional_exclusive()

The DW MIPI CSI-2 RX is used on different SoCs, not all of which provide a
reset controller. Switch to devm_reset_control_get_optional_exclusive()
to support such platforms.

Reset presence and numbering are validated by the DT binding.

Reviewed-by: Michael Riesch <michael.riesch@collabora.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

diff --git a/drivers/media/platform/synopsys/dw-mipi-csi2rx.c b/drivers/media/platform/synopsys/dw-mipi-csi2rx.c
index 170346ae1a599e43bba9d19476ee4d65124303bd..0cc892f4a1b3c6ce575a5d4fca7acf7057f7b7f7 100644 (file)
--- a/drivers/media/platform/synopsys/dw-mipi-csi2rx.c
+++ b/drivers/media/platform/synopsys/dw-mipi-csi2rx.c
@@ -639,7 +639,7 @@ static int dw_mipi_csi2rx_probe(struct platform_device *pdev)
                return dev_err_probe(dev, PTR_ERR(csi2->phy),
                                     "failed to get MIPI CSI-2 PHY\n");
 
-       csi2->reset = devm_reset_control_get_exclusive(dev, NULL);
+       csi2->reset = devm_reset_control_get_optional_exclusive(dev, NULL);
        if (IS_ERR(csi2->reset))
                return dev_err_probe(dev, PTR_ERR(csi2->reset),
                                     "failed to get reset\n");