linux-kernel - [PATCH v2 09/18] media: rzg2l-cru: csi2: Make system clock optional for RZ/V2H(P) SoC

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Message-Id: <20250221155532.576759-10-tommaso.merciai.xr@bp.renesas.com>
Date: Fri, 21 Feb 2025 16:55:23 +0100
From: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
To: tomm.merciai@...il.com
Cc: linux-renesas-soc@...r.kernel.org,
	linux-media@...r.kernel.org,
	biju.das.jz@...renesas.com,
	prabhakar.mahadev-lad.rj@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	Hans Verkuil <hverkuil@...all.nl>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 09/18] media: rzg2l-cru: csi2: Make system clock optional for RZ/V2H(P) SoC

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

The RZ/V2H(P) SoC does not provide a `system` clock for the CSI-2
interface. To accommodate this, use `devm_clk_get_optional()` instead
of `devm_clk_get()` when retrieving the clock.

This patch is in preparation for adding support for RZ/V2H(P) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
---
 drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
index 3a4e720ba732..771fa35558be 100644
--- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
+++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-csi2.c
@@ -796,7 +796,7 @@ static int rzg2l_csi2_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, PTR_ERR(csi2->presetn),
 				     "Failed to get cpg presetn\n");
 
-	csi2->sysclk = devm_clk_get(dev, "system");
+	csi2->sysclk = devm_clk_get_optional(dev, "system");
 	if (IS_ERR(csi2->sysclk))
 		return dev_err_probe(dev, PTR_ERR(csi2->sysclk),
 				     "Failed to get system clk\n");
-- 
2.34.1