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clk-bcm2835: Mark used PLLs and dividers CRITICAL
author
Phil Elwell
<phil@raspberrypi.org>
Mon, 13 Feb 2017 17:20:08 +0000
(17:20 +0000)
committer
popcornmix
<popcornmix@gmail.com>
Mon, 13 May 2019 23:07:52 +0000
(
00:07
+0100)
The VPU configures and relies on several PLLs and dividers. Mark all
enabled dividers and their PLLs as CRITICAL to prevent the kernel from
switching them off.
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
drivers/clk/bcm/clk-bcm2835.c
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diff --git
a/drivers/clk/bcm/clk-bcm2835.c
b/drivers/clk/bcm/clk-bcm2835.c
index
6c2eac8
..
841e252
100644
(file)
--- a/
drivers/clk/bcm/clk-bcm2835.c
+++ b/
drivers/clk/bcm/clk-bcm2835.c
@@
-1362,6
+1362,11
@@
bcm2835_register_pll_divider(struct bcm2835_cprman *cprman,
divider->div.hw.init = &init;
divider->div.table = NULL;
+ if (!(cprman_read(cprman, data->cm_reg) & data->hold_mask)) {
+ init.flags |= CLK_IS_CRITICAL;
+ divider->div.flags |= CLK_IS_CRITICAL;
+ }
+
divider->cprman = cprman;
divider->data = data;