011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
From e58a4a79b9b83d9afa66c0e2cc7490ca40a193bf Mon Sep 17 00:00:00 2001
|
|
From: Lee Jones <lee.jones@linaro.org>
|
|
Date: Thu, 11 Feb 2016 13:19:09 -0800
|
|
Subject: [PATCH] clk: Allow clocks to be marked as CRITICAL
|
|
|
|
Critical clocks are those which must not be gated, else undefined
|
|
or catastrophic failure would occur. Here we have chosen to
|
|
ensure the prepare/enable counts are correctly incremented, so as
|
|
not to confuse users with enabled clocks with no visible users.
|
|
|
|
Signed-off-by: Lee Jones <lee.jones@linaro.org>
|
|
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
|
|
Link: lkml.kernel.org/r/1455225554-13267-2-git-send-email-mturquette@baylibre.com
|
|
(cherry picked from commit 32b9b10961860860268961d9aad0c56a73018c37)
|
|
---
|
|
drivers/clk/clk.c | 5 +++++
|
|
include/linux/clk-provider.h | 1 +
|
|
2 files changed, 6 insertions(+)
|
|
|
|
--- a/drivers/clk/clk.c
|
|
+++ b/drivers/clk/clk.c
|
|
@@ -2466,6 +2466,11 @@ static int __clk_init(struct device *dev
|
|
if (core->ops->init)
|
|
core->ops->init(core->hw);
|
|
|
|
+ if (core->flags & CLK_IS_CRITICAL) {
|
|
+ clk_core_prepare(core);
|
|
+ clk_core_enable(core);
|
|
+ }
|
|
+
|
|
kref_init(&core->ref);
|
|
out:
|
|
clk_prepare_unlock();
|
|
--- a/include/linux/clk-provider.h
|
|
+++ b/include/linux/clk-provider.h
|
|
@@ -31,6 +31,7 @@
|
|
#define CLK_SET_RATE_NO_REPARENT BIT(7) /* don't re-parent on rate change */
|
|
#define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */
|
|
#define CLK_RECALC_NEW_RATES BIT(9) /* recalc rates after notifications */
|
|
+#define CLK_IS_CRITICAL BIT(11) /* do not gate, ever */
|
|
|
|
struct clk;
|
|
struct clk_hw;
|