drm/exynos: Use devm_* APIs in exynos_hdmi.c

devm_* functions are device managed and make error handling and exit code
simpler.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

1 files changed, 13 insertions, 47 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index a4052271a1f6..9f017748e730 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -2176,27 +2176,27 @@ static int __devinit hdmi_resources_init(struct hdmi_context *hdata)
         memset(res, 0, sizeof(*res));
 
         /* get clocks, power */
-        res->hdmi = clk_get(dev, "hdmi");
+        res->hdmi = devm_clk_get(dev, "hdmi");
         if (IS_ERR_OR_NULL(res->hdmi)) {
                 DRM_ERROR("failed to get clock 'hdmi'\n");
                 goto fail;
         }
-        res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
+        res->sclk_hdmi = devm_clk_get(dev, "sclk_hdmi");
         if (IS_ERR_OR_NULL(res->sclk_hdmi)) {
                 DRM_ERROR("failed to get clock 'sclk_hdmi'\n");
                 goto fail;
         }
-        res->sclk_pixel = clk_get(dev, "sclk_pixel");
+        res->sclk_pixel = devm_clk_get(dev, "sclk_pixel");
         if (IS_ERR_OR_NULL(res->sclk_pixel)) {
                 DRM_ERROR("failed to get clock 'sclk_pixel'\n");
                 goto fail;
         }
-        res->sclk_hdmiphy = clk_get(dev, "sclk_hdmiphy");
+        res->sclk_hdmiphy = devm_clk_get(dev, "sclk_hdmiphy");
         if (IS_ERR_OR_NULL(res->sclk_hdmiphy)) {
                 DRM_ERROR("failed to get clock 'sclk_hdmiphy'\n");
                 goto fail;
         }
-        res->hdmiphy = clk_get(dev, "hdmiphy");
+        res->hdmiphy = devm_clk_get(dev, "hdmiphy");
         if (IS_ERR_OR_NULL(res->hdmiphy)) {
                 DRM_ERROR("failed to get clock 'hdmiphy'\n");
                 goto fail;
@@ -2204,7 +2204,7 @@ static int __devinit hdmi_resources_init(struct hdmi_context *hdata)
 
         clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
 
-        res->regul_bulk = kzalloc(ARRAY_SIZE(supply) *
+        res->regul_bulk = devm_kzalloc(dev, ARRAY_SIZE(supply) *
                 sizeof(res->regul_bulk[0]), GFP_KERNEL);
         if (!res->regul_bulk) {
                 DRM_ERROR("failed to get memory for regulators\n");
@@ -2214,7 +2214,7 @@ static int __devinit hdmi_resources_init(struct hdmi_context *hdata)
                 res->regul_bulk[i].supply = supply[i];
                 res->regul_bulk[i].consumer = NULL;
         }
-        ret = regulator_bulk_get(dev, ARRAY_SIZE(supply), res->regul_bulk);
+        ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(supply), res->regul_bulk);
         if (ret) {
                 DRM_ERROR("failed to get regulators\n");
                 goto fail;
@@ -2227,28 +2227,6 @@ fail:
         return -ENODEV;
 }
 
-static int hdmi_resources_cleanup(struct hdmi_context *hdata)
-{
-        struct hdmi_resources *res = &hdata->res;
-
-        regulator_bulk_free(res->regul_count, res->regul_bulk);
-        /* kfree is NULL-safe */
-        kfree(res->regul_bulk);
-        if (!IS_ERR_OR_NULL(res->hdmiphy))
-                clk_put(res->hdmiphy);
-        if (!IS_ERR_OR_NULL(res->sclk_hdmiphy))
-                clk_put(res->sclk_hdmiphy);
-        if (!IS_ERR_OR_NULL(res->sclk_pixel))
-                clk_put(res->sclk_pixel);
-        if (!IS_ERR_OR_NULL(res->sclk_hdmi))
-                clk_put(res->sclk_hdmi);
-        if (!IS_ERR_OR_NULL(res->hdmi))
-                clk_put(res->hdmi);
-        memset(res, 0, sizeof(*res));
-
-        return 0;
-}
-
 static struct i2c_client *hdmi_ddc, *hdmi_hdmiphy;
 
 void hdmi_attach_ddc_client(struct i2c_client *ddc)
@@ -2388,36 +2366,32 @@ static int __devinit hdmi_probe(struct platform_device *pdev)
         ret = hdmi_resources_init(hdata);
 
         if (ret) {
-                ret = -EINVAL;
                 DRM_ERROR("hdmi_resources_init failed\n");
-                goto err_data;
+                return -EINVAL;
         }
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res) {
                 DRM_ERROR("failed to find registers\n");
-                ret = -ENOENT;
-                goto err_resource;
+                return -ENOENT;
         }
 
         hdata->regs = devm_request_and_ioremap(&pdev->dev, res);
         if (!hdata->regs) {
                 DRM_ERROR("failed to map registers\n");
-                ret = -ENXIO;
-                goto err_resource;
+                return -ENXIO;
         }
 
-        ret = gpio_request(hdata->hpd_gpio, "HPD");
+        ret = devm_gpio_request(&pdev->dev, hdata->hpd_gpio, "HPD");
         if (ret) {
                 DRM_ERROR("failed to request HPD gpio\n");
-                goto err_resource;
+                return ret;
         }
 
         /* DDC i2c driver */
         if (i2c_add_driver(&ddc_driver)) {
                 DRM_ERROR("failed to register ddc i2c driver\n");
-                ret = -ENOENT;
-                goto err_gpio;
+                return -ENOENT;
         }
 
         hdata->ddc_port = hdmi_ddc;
@@ -2480,11 +2454,6 @@ err_hdmiphy:
         i2c_del_driver(&hdmiphy_driver);
 err_ddc:
         i2c_del_driver(&ddc_driver);
-err_gpio:
-        gpio_free(hdata->hpd_gpio);
-err_resource:
-        hdmi_resources_cleanup(hdata);
-err_data:
         return ret;
 }
 
@@ -2501,9 +2470,6 @@ static int __devexit hdmi_remove(struct platform_device *pdev)
         free_irq(hdata->internal_irq, hdata);
         free_irq(hdata->external_irq, hdata);
 
-        gpio_free(hdata->hpd_gpio);
-
-        hdmi_resources_cleanup(hdata);
 
         /* hdmiphy i2c driver */
         i2c_del_driver(&hdmiphy_driver);