[PATCH v8 08/16] drm/meson: dw-hdmi: Don't open code devm_clk_get_enabled()

Uwe Kleine-König
2022-03-14T14:17:11Z

devm_clk_get_enabled() returns a clock prepared and enabled and already
registers a devm exit handler to disable (and unprepare) the clock.

There is slight change in behavior as a failure to enable the clock
now results in an error message, too. Also the actual error code is added
to the message.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
drivers/gpu/drm/meson/meson_dw_hdmi.c | 48 +++++++++------------------
1 file changed, 16 insertions(+), 32 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 5cd2b2ebbbd3..6034e80c5b2e 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -670,29 +670,6 @@ static void meson_disable_regulator(void *data)
regulator_disable(data);
}

-static void meson_disable_clk(void *data)
-{
- clk_disable_unprepare(data);
-}
-
-static int meson_enable_clk(struct device *dev, char *name)
-{
- struct clk *clk;
- int ret;
-
- clk = devm_clk_get(dev, name);
- if (IS_ERR(clk)) {
- dev_err(dev, "Unable to get %s pclk\n", name);
- return PTR_ERR(clk);
- }
-
- ret = clk_prepare_enable(clk);
- if (!ret)
- ret = devm_add_action_or_reset(dev, meson_disable_clk, clk);
-
- return ret;
-}
-
static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
void *data)
{
@@ -702,6 +679,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
struct drm_device *drm = data;
struct meson_drm *priv = drm->dev_private;
struct dw_hdmi_plat_data *dw_plat_data;
+ struct clk *clk;
int irq;
int ret;

@@ -763,17 +741,23 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
if (IS_ERR(meson_dw_hdmi->hdmitx))
return PTR_ERR(meson_dw_hdmi->hdmitx);

- ret = meson_enable_clk(dev, "isfr");
- if (ret)
- return ret;
+ clk = devm_clk_get_enabled(dev, "isfr");
+ if (IS_ERR(clk)) {
+ dev_err(dev, "Failed to get enabled isfr pclk (%pe)\n", clk);
+ return PTR_ERR(clk);
+ }

- ret = meson_enable_clk(dev, "iahb");
- if (ret)
- return ret;
+ clk = devm_clk_get_enabled(dev, "iahb");
+ if (IS_ERR(clk)) {
+ dev_err(dev, "Failed to get enabled iahb pclk (%pe)\n", clk);
+ return PTR_ERR(clk);
+ }

- ret = meson_enable_clk(dev, "venci");
- if (ret)
- return ret;
+ clk = devm_clk_get_enabled(dev, "venci");
+ if (IS_ERR(clk)) {
+ dev_err(dev, "Failed to get enabled venci pclk (%pe)\n", clk);
+ return PTR_ERR(clk);
+ }

dw_plat_data->regm = devm_regmap_init(dev, NULL, meson_dw_hdmi,
&meson_dw_hdmi_regmap_config);
--
2.35.1