linux-kernel - [PATCH 1/6] media: synopsys: use devm_reset_control_get_optional

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Message-Id: <20260210-imx93-dw-csi2-v1-1-69667bb86bfa@nxp.com>
Date: Tue, 10 Feb 2026 12:11:08 -0500
From: Frank Li <Frank.Li@....com>
To: Michael Riesch <michael.riesch@...labora.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Philipp Zabel <p.zabel@...gutronix.de>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, Guoniu Zhou <guoniu.zhou@....nxp.com>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, imx@...ts.linux.dev, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH 1/6] media: synopsys: 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.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/media/platform/synopsys/dw-mipi-csi2rx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/synopsys/dw-mipi-csi2rx.c b/drivers/media/platform/synopsys/dw-mipi-csi2rx.c
index 170346ae1a599e43bba9d19476ee4d65124303bd..0cc892f4a1b3c6ce575a5d4fca7acf7057f7b7f7 100644
--- 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");

-- 
2.43.0