linux-kernel - [PATCH 2/3] drm/etnaviv: split clock acquirement code to a separate function

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Date:   Mon,  4 Apr 2022 18:31:05 +0800
From:   Sui Jingfeng <15330273260@....cn>
To:     Lucas Stach <l.stach@...gutronix.de>,
        Russell King <linux+etnaviv@...linux.org.uk>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     etnaviv@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] drm/etnaviv: split clock acquirement code to a separate function

 This patch add a function (etnaviv_gpu_clk_get()) which is separated
 from the etnaviv_gpu_platform_probe() function.

Signed-off-by: Sui Jingfeng <15330273260@....cn>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 48 +++++++++++++++------------
 1 file changed, 27 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 37018bc55810..d607be474aeb 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1561,6 +1561,32 @@ static int etnaviv_gpu_clk_disable(struct etnaviv_gpu *gpu)
 	return 0;
 }
 
+static void etnaviv_gpu_clk_get(struct etnaviv_gpu *gpu, struct device *dev)
+{
+	/* Get Clocks: */
+	gpu->clk_reg = devm_clk_get(dev, "reg");
+	DBG("clk_reg: %p", gpu->clk_reg);
+	if (IS_ERR(gpu->clk_reg))
+		gpu->clk_reg = NULL;
+
+	gpu->clk_bus = devm_clk_get(dev, "bus");
+	DBG("clk_bus: %p", gpu->clk_bus);
+	if (IS_ERR(gpu->clk_bus))
+		gpu->clk_bus = NULL;
+
+	gpu->clk_core = devm_clk_get(dev, "core");
+	DBG("clk_core: %p", gpu->clk_core);
+	if (IS_ERR(gpu->clk_core))
+		gpu->clk_core = NULL;
+	gpu->base_rate_core = clk_get_rate(gpu->clk_core);
+
+	gpu->clk_shader = devm_clk_get(dev, "shader");
+	DBG("clk_shader: %p", gpu->clk_shader);
+	if (IS_ERR(gpu->clk_shader))
+		gpu->clk_shader = NULL;
+	gpu->base_rate_shader = clk_get_rate(gpu->clk_shader);
+}
+
 int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms)
 {
 	unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
@@ -1806,27 +1832,7 @@ static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
 	}
 
 	/* Get Clocks: */
-	gpu->clk_reg = devm_clk_get_optional(&pdev->dev, "reg");
-	DBG("clk_reg: %p", gpu->clk_reg);
-	if (IS_ERR(gpu->clk_reg))
-		return PTR_ERR(gpu->clk_reg);
-
-	gpu->clk_bus = devm_clk_get_optional(&pdev->dev, "bus");
-	DBG("clk_bus: %p", gpu->clk_bus);
-	if (IS_ERR(gpu->clk_bus))
-		return PTR_ERR(gpu->clk_bus);
-
-	gpu->clk_core = devm_clk_get(&pdev->dev, "core");
-	DBG("clk_core: %p", gpu->clk_core);
-	if (IS_ERR(gpu->clk_core))
-		return PTR_ERR(gpu->clk_core);
-	gpu->base_rate_core = clk_get_rate(gpu->clk_core);
-
-	gpu->clk_shader = devm_clk_get_optional(&pdev->dev, "shader");
-	DBG("clk_shader: %p", gpu->clk_shader);
-	if (IS_ERR(gpu->clk_shader))
-		return PTR_ERR(gpu->clk_shader);
-	gpu->base_rate_shader = clk_get_rate(gpu->clk_shader);
+	etnaviv_gpu_clk_get(gpu, dev);
 
 	/* TODO: figure out max mapped size */
 	dev_set_drvdata(dev, gpu);
-- 
2.25.1