From d06e7f8f666483e0f0719245c1056490523e0805 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Wed, 16 Apr 2014 10:43:41 +0200
Subject: [PATCH] drm/tegra: hdmi - Clean up clock usage
Clocks are never enabled or disabled in atomic context, so we can use
the clk_prepare_enable() and clk_disable_unprepare() helpers instead.
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
drivers/gpu/drm/tegra/hdmi.c | 20 ++++++--------------
1 file changed, 6 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c
index 96fa838d60a41..5bc26590ab327 100644
--- a/drivers/gpu/drm/tegra/hdmi.c
+++ b/drivers/gpu/drm/tegra/hdmi.c
@@ -727,7 +727,7 @@ static int tegra_output_hdmi_enable(struct tegra_output *output)
if (err < 0)
return err;
- err = clk_enable(hdmi->clk);
+ err = clk_prepare_enable(hdmi->clk);
if (err < 0) {
dev_err(hdmi->dev, "failed to enable clock: %d\n", err);
return err;
@@ -944,8 +944,8 @@ static int tegra_output_hdmi_disable(struct tegra_output *output)
tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
}
+ clk_disable_unprepare(hdmi->clk);
reset_control_assert(hdmi->rst);
- clk_disable(hdmi->clk);
regulator_disable(hdmi->vdd);
regulator_disable(hdmi->pll);
@@ -1015,7 +1015,7 @@ static int tegra_hdmi_show_regs(struct seq_file *s, void *data)
struct tegra_hdmi *hdmi = node->info_ent->data;
int err;
- err = clk_enable(hdmi->clk);
+ err = clk_prepare_enable(hdmi->clk);
if (err)
return err;
@@ -1184,7 +1184,7 @@ static int tegra_hdmi_show_regs(struct seq_file *s, void *data)
#undef DUMP_REG
- clk_disable(hdmi->clk);
+ clk_disable_unprepare(hdmi->clk);
return 0;
}
@@ -1379,18 +1379,10 @@ static int tegra_hdmi_probe(struct platform_device *pdev)
return PTR_ERR(hdmi->rst);
}
- err = clk_prepare(hdmi->clk);
- if (err < 0)
- return err;
-
hdmi->clk_parent = devm_clk_get(&pdev->dev, "parent");
if (IS_ERR(hdmi->clk_parent))
return PTR_ERR(hdmi->clk_parent);
- err = clk_prepare(hdmi->clk_parent);
- if (err < 0)
- return err;
-
err = clk_set_parent(hdmi->clk, hdmi->clk_parent);
if (err < 0) {
dev_err(&pdev->dev, "failed to setup clocks: %d\n", err);
@@ -1466,8 +1458,8 @@ static int tegra_hdmi_remove(struct platform_device *pdev)
return err;
}
- clk_unprepare(hdmi->clk_parent);
- clk_unprepare(hdmi->clk);
+ clk_disable_unprepare(hdmi->clk_parent);
+ clk_disable_unprepare(hdmi->clk);
return 0;
}
--
2.30.2