[PATCH v13 3/7] drm/sun4i: dsi: Get the mod clock for A31

From: Jagan Teki <jagan@amarulasolutions.com>
To: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>
Cc: michael@amarulasolutions.com, Icenowy Zheng <icenowy@aosc.io>,
	linux-sunxi <linux-sunxi@googlegroups.com>,
	dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	linux-amarula@amarulasolutions.com,
	Jagan Teki <jagan@amarulasolutions.com>
Subject: [PATCH v13 3/7] drm/sun4i: dsi: Get the mod clock for A31
Date: Thu, 19 Dec 2019 00:40:13 +0530	[thread overview]
Message-ID: <20191218191017.2895-4-jagan@amarulasolutions.com> (raw)
In-Reply-To: <20191218191017.2895-1-jagan@amarulasolutions.com>

As per the user manual, look like mod clock is not mandatory
for all Allwinner MIPI DSI controllers, it is connected to
CLK_DSI_SCLK for A31 and not available in A64.

So, add compatible check for A31 and get mod clock accordingly.

Tested-by: Merlijn Wajer <merlijn@wizzup.org>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
Changes for v13:
- Drop has_mod_clk quirk as commented by Chen-Yu

 drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index c958ca9bae63..68b88a3dc4c5 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -1120,10 +1120,13 @@ static int sun6i_dsi_probe(struct platform_device *pdev)
 		return PTR_ERR(dsi->reset);
 	}
 
-	dsi->mod_clk = devm_clk_get(dev, "mod");
-	if (IS_ERR(dsi->mod_clk)) {
-		dev_err(dev, "Couldn't get the DSI mod clock\n");
-		return PTR_ERR(dsi->mod_clk);
+	if (of_device_is_compatible(dev->of_node,
+				    "allwinner,sun6i-a31-mipi-dsi")) {
+		dsi->mod_clk = devm_clk_get(dev, "mod");
+		if (IS_ERR(dsi->mod_clk)) {
+			dev_err(dev, "Couldn't get the DSI mod clock\n");
+			return PTR_ERR(dsi->mod_clk);
+		}
 	}
 
 	/*
-- 
2.18.0.321.gffc6fa0e3

