openwrtv3/target/linux/brcm2708/patches-4.9/0026-Register-the-clocks-early-during-the-boot-process.patch

From 492d6b9c3f1f8cc1eb890dc0eafacae51d6ba2f0 Mon Sep 17 00:00:00 2001
From: Martin Sperl <kernel@martin.sperl.org>
Date: Fri, 2 Sep 2016 16:45:27 +0100
Subject: [PATCH] Register the clocks early during the boot process, so that
 special/critical clocks can get enabled early on in the boot process avoiding
 the risk of disabling a clock, pll_divider or pll when a claiming driver
 fails to install propperly - maybe it needs to defer.

Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
---
 drivers/clk/bcm/clk-bcm2835.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -1903,8 +1903,15 @@ static int bcm2835_clk_probe(struct plat
 	if (ret)
 		return ret;
 
-	return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
+	ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
 				      &cprman->onecell);
+	if (ret)
+		return ret;
+
+	/* note that we have registered all the clocks */
+	dev_dbg(dev, "registered %d clocks\n", asize);
+
+	return 0;
 }
 
 static const struct of_device_id bcm2835_clk_of_match[] = {
@@ -1921,7 +1928,11 @@ static struct platform_driver bcm2835_cl
 	.probe          = bcm2835_clk_probe,
 };
 
-builtin_platform_driver(bcm2835_clk_driver);
+static int __init __bcm2835_clk_driver_init(void)
+{
+	return platform_driver_register(&bcm2835_clk_driver);
+}
+core_initcall(__bcm2835_clk_driver_init);
 
 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
 MODULE_DESCRIPTION("BCM2835 clock driver");