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28 lines
931 B
Diff
28 lines
931 B
Diff
From 2f4b354fedfd33cd996d261f66c887a87cbee641 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 13 Feb 2017 17:20:08 +0000
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Subject: [PATCH] clk-bcm2835: Mark used PLLs and dividers CRITICAL
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The VPU configures and relies on several PLLs and dividers. Mark all
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enabled dividers and their PLLs as CRITICAL to prevent the kernel from
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switching them off.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/clk/bcm/clk-bcm2835.c | 5 +++++
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1 file changed, 5 insertions(+)
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--- a/drivers/clk/bcm/clk-bcm2835.c
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+++ b/drivers/clk/bcm/clk-bcm2835.c
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@@ -1407,6 +1407,11 @@ bcm2835_register_pll_divider(struct bcm2
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divider->div.hw.init = &init;
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divider->div.table = NULL;
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+ if (!(cprman_read(cprman, divider_data->cm_reg) & divider_data->hold_mask)) {
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+ init.flags |= CLK_IS_CRITICAL;
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+ divider->div.flags |= CLK_IS_CRITICAL;
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+ }
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+
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divider->cprman = cprman;
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divider->data = divider_data;
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