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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/char/hw_random/omap-rng.c
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@@ -22,6 +22,7 @@
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 #include <linux/platform_device.h>
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 #include <linux/hw_random.h>
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 #include <linux/delay.h>
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+#include <linux/kernel.h>
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 #include <linux/slab.h>
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 #include <linux/pm_runtime.h>
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 #include <linux/of.h>
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@@ -243,7 +244,6 @@
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 	.cleanup	= omap2_rng_cleanup,
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 };
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-#if defined(CONFIG_OF)
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 static inline u32 omap4_rng_data_present(struct omap_rng_dev *priv)
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 {
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 	return omap_rng_read(priv, RNG_STATUS_REG) & RNG_REG_STATUS_RDY;
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@@ -358,7 +358,7 @@
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 	.cleanup	= omap4_rng_cleanup,
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 };
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-static const struct of_device_id omap_rng_of_match[] = {
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+static const struct of_device_id omap_rng_of_match[] __maybe_unused = {
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 		{
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 			.compatible	= "ti,omap2-rng",
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 			.data		= &omap2_rng_pdata,
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@@ -392,11 +392,8 @@
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 	if (of_device_is_compatible(dev->of_node, "ti,omap4-rng") ||
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 	    of_device_is_compatible(dev->of_node, "inside-secure,safexcel-eip76")) {
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 		irq = platform_get_irq(pdev, 0);
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-		if (irq < 0) {
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-			dev_err(dev, "%s: error getting IRQ resource - %d\n",
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-				__func__, irq);
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+		if (irq < 0)
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 			return irq;
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-		}
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 		err = devm_request_irq(dev, irq, omap4_rng_irq,
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 				       IRQF_TRIGGER_NONE, dev_name(dev), priv);
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@@ -421,13 +418,6 @@
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 	}
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 	return 0;
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 }
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-#else
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-static int of_get_omap_rng_device_details(struct omap_rng_dev *omap_rng,
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-					  struct platform_device *pdev)
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-{
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-	return -EINVAL;
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-}
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-#endif
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421
 
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 static int get_omap_rng_device_details(struct omap_rng_dev *omap_rng)
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 {
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@@ -439,7 +429,6 @@
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 static int omap_rng_probe(struct platform_device *pdev)
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 {
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 	struct omap_rng_dev *priv;
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-	struct resource *res;
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 	struct device *dev = &pdev->dev;
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 	int ret;
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@@ -456,8 +445,7 @@
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 	platform_set_drvdata(pdev, priv);
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 	priv->dev = dev;
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	priv->base = devm_ioremap_resource(dev, res);
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+	priv->base = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(priv->base)) {
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 		ret = PTR_ERR(priv->base);
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 		goto err_ioremap;
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@@ -478,7 +466,7 @@
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 	}
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 	priv->clk = devm_clk_get(&pdev->dev, NULL);
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-	if (IS_ERR(priv->clk) && PTR_ERR(priv->clk) == -EPROBE_DEFER)
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+	if (PTR_ERR(priv->clk) == -EPROBE_DEFER)
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 		return -EPROBE_DEFER;
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 	if (!IS_ERR(priv->clk)) {
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 		ret = clk_prepare_enable(priv->clk);
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@@ -490,7 +478,7 @@
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 	}
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 	priv->clk_reg = devm_clk_get(&pdev->dev, "reg");
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-	if (IS_ERR(priv->clk_reg) && PTR_ERR(priv->clk_reg) == -EPROBE_DEFER)
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+	if (PTR_ERR(priv->clk_reg) == -EPROBE_DEFER)
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 		return -EPROBE_DEFER;
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 	if (!IS_ERR(priv->clk_reg)) {
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 		ret = clk_prepare_enable(priv->clk_reg);
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@@ -507,7 +495,7 @@
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 	if (ret)
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 		goto err_register;
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-	ret = hwrng_register(&priv->rng);
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+	ret = devm_hwrng_register(&pdev->dev, &priv->rng);
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 	if (ret)
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 		goto err_register;
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@@ -532,7 +520,6 @@
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 {
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 	struct omap_rng_dev *priv = platform_get_drvdata(pdev);
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-	hwrng_unregister(&priv->rng);
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 	priv->pdata->cleanup(priv);
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