9b2a6132364f79e73ccb04c26c3323f5ae38f46a
[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.9 / 950-0026-Register-the-clocks-early-during-the-boot-process.patch
1 From 492d6b9c3f1f8cc1eb890dc0eafacae51d6ba2f0 Mon Sep 17 00:00:00 2001
2 From: Martin Sperl <kernel@martin.sperl.org>
3 Date: Fri, 2 Sep 2016 16:45:27 +0100
4 Subject: [PATCH] Register the clocks early during the boot process, so that
5 special/critical clocks can get enabled early on in the boot process avoiding
6 the risk of disabling a clock, pll_divider or pll when a claiming driver
7 fails to install propperly - maybe it needs to defer.
8
9 Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
10 ---
11 drivers/clk/bcm/clk-bcm2835.c | 15 +++++++++++++--
12 1 file changed, 13 insertions(+), 2 deletions(-)
13
14 --- a/drivers/clk/bcm/clk-bcm2835.c
15 +++ b/drivers/clk/bcm/clk-bcm2835.c
16 @@ -1903,8 +1903,15 @@ static int bcm2835_clk_probe(struct plat
17 if (ret)
18 return ret;
19
20 - return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
21 + ret = of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
22 &cprman->onecell);
23 + if (ret)
24 + return ret;
25 +
26 + /* note that we have registered all the clocks */
27 + dev_dbg(dev, "registered %d clocks\n", asize);
28 +
29 + return 0;
30 }
31
32 static const struct of_device_id bcm2835_clk_of_match[] = {
33 @@ -1921,7 +1928,11 @@ static struct platform_driver bcm2835_cl
34 .probe = bcm2835_clk_probe,
35 };
36
37 -builtin_platform_driver(bcm2835_clk_driver);
38 +static int __init __bcm2835_clk_driver_init(void)
39 +{
40 + return platform_driver_register(&bcm2835_clk_driver);
41 +}
42 +core_initcall(__bcm2835_clk_driver_init);
43
44 MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
45 MODULE_DESCRIPTION("BCM2835 clock driver");