Commit e96bec00 authored by Lad Prabhakar's avatar Lad Prabhakar Committed by Biju Das
Browse files

drm: renesas: rz-du: mipi_dsi: Make "rst" reset control optional for RZ/V2H(P) 



In preparation for adding support for the Renesas RZ/V2H(P) SoC, make the
"rst" reset control optional in the MIPI DSI driver. The RZ/V2H(P) SoC
does not provide this reset line, and attempting to acquire it using the
mandatory API causes probe failure.

Switching to devm_reset_control_get_optional_exclusive() ensures
compatibility with both SoCs that provide this reset line and those that
do not, such as RZ/V2H(P).

Co-developed-by: default avatarFabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: default avatarFabrizio Castro <fabrizio.castro.jz@renesas.com>
Signed-off-by: default avatarLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20250609225630.502888-6-prabhakar.mahadev-lad.rj@bp.renesas.com
parent 2991c3f0

drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c

+1 −1
Original line number Diff line number Diff line
@@ -937,7 +937,7 @@ static int rzg2l_mipi_dsi_probe(struct platform_device *pdev) 
	if (IS_ERR(dsi->vclk))

		return PTR_ERR(dsi->vclk);



	dsi->rstc = devm_reset_control_get_exclusive(dsi->dev, "rst");

	dsi->rstc = devm_reset_control_get_optional_exclusive(dsi->dev, "rst");

	if (IS_ERR(dsi->rstc))

		return dev_err_probe(dsi->dev, PTR_ERR(dsi->rstc),

				     "failed to get rst\n");