reset: lpc18xx: get rid of global variables for restart notifier

Moving the notifier_block into the drivers priv struct allows us
to retrive the priv struct with container_of and remove the
global variables.

Signed-off-by: Joachim Eastwood <[e-mail]>
Signed-off-by: Philipp Zabel <[e-mail]>

drivers/reset/reset-lpc18xx.c

···
 
 struct lpc18xx_rgu_data {
 	struct reset_controller_dev rcdev;
+	struct notifier_block restart_nb;
 	struct clk *clk_delay;
 	struct clk *clk_reg;
 	void __iomem *base;
···
 
 #define to_rgu_data(p) container_of(p, struct lpc18xx_rgu_data, rcdev)
 
-static void __iomem *rgu_base;
-
-static int lpc18xx_rgu_restart(struct notifier_block *this, unsigned long mode,
+static int lpc18xx_rgu_restart(struct notifier_block *nb, unsigned long mode,
 			       void *cmd)
 {
-	writel(BIT(LPC18XX_RGU_CORE_RST), rgu_base + LPC18XX_RGU_CTRL0);
+	struct lpc18xx_rgu_data *rc = container_of(nb, struct lpc18xx_rgu_data,
+						   restart_nb);
+
+	writel(BIT(LPC18XX_RGU_CORE_RST), rc->base + LPC18XX_RGU_CTRL0);
 	mdelay(2000);
 
 	pr_emerg("%s: unable to restart system\n", __func__);
 
 	return NOTIFY_DONE;
 }
-
-static struct notifier_block lpc18xx_rgu_restart_nb = {
-	.notifier_call = lpc18xx_rgu_restart,
-	.priority = 192,
-};
 
 /*
  * The LPC18xx RGU has mostly self-deasserting resets except for the
···
 		goto dis_clks;
 	}
 
-	rgu_base = rc->base;
-	ret = register_restart_handler(&lpc18xx_rgu_restart_nb);
+	rc->restart_nb.priority = 192,
+	rc->restart_nb.notifier_call = lpc18xx_rgu_restart,
+	ret = register_restart_handler(&rc->restart_nb);
 	if (ret)
 		dev_warn(&pdev->dev, "failed to register restart handler\n");
 
···
 	struct lpc18xx_rgu_data *rc = platform_get_drvdata(pdev);
 	int ret;
 
-	ret = unregister_restart_handler(&lpc18xx_rgu_restart_nb);
+	ret = unregister_restart_handler(&rc->restart_nb);
 	if (ret)
 		dev_warn(&pdev->dev, "failed to unregister restart handler\n");