bcm27xx: add linux 5.4 support

Tested on bcm2710 (Raspberry Pi 3B).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0018-Register-the-clocks-early-during-the-boot-process-so.patch b/target/linux/bcm27xx/patches-5.4/950-0018-Register-the-clocks-early-during-the-boot-process-so.patch
new file mode 100644
index 0000000000..40653989b4
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0018-Register-the-clocks-early-during-the-boot-process-so.patch
@@ -0,0 +1,45 @@
+From fe4c14f1d934801361e9c9e2456f8250af2fffbd 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
+@@ -2248,8 +2248,15 @@ 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 cprman_plat_data cprman_bcm2835_plat_data = {
+@@ -2275,7 +2282,11 @@ 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");