mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-09 05:31:17 -04:00
Code Issues Packages Projects Releases Wiki Activity

arm64: dts: qcom: msm8998: reserve potentially inaccessible clocks

Browse Source 
With the gcc driver now being more complete and describing clocks which
might not always be write-accessible to the OS, conservatively specify
all such clocks as protected in the SoC dts.
The board dts - or even user-supplied dts - can override this property
to reflect the actual configuration.

Signed-off-by: Michael Srba <michael.srba@seznam.cz>
Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220411072156.24451-6-michael.srba@seznam.cz
This commit is contained in:
Michael Srba
2022-04-11 09:21:56 +02:00
committed by Bjorn Andersson
parent 0fb9ddbc63
commit 1ed29355df
1 changed files with 15 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
arch/arm64/boot/dts/qcom/msm8998.dtsi
View File

@@ -815,6 +815,21 @@ gcc: clock-controller@100000 {
clock-names = "xo", "sleep_clk";
clocks = <&xo>, <&sleep_clk>;
/*
* The hypervisor typically configures the memory region where these clocks
* reside as read-only for the HLOS. If the HLOS tried to enable or disable
* these clocks on a device with such configuration (e.g. because they are
* enabled but unused during boot-up), the device will most likely decide
* to reboot.
* In light of that, we are conservative here and we list all such clocks
* as protected. The board dts (or a user-supplied dts) can override the
* list of protected clocks if it differs from the norm, and it is in fact
* desired for the HLOS to manage these clocks
*/
protected-clocks = <AGGRE2_SNOC_NORTH_AXI>,
<SSC_XO>,
<SSC_CNOC_AHBS_CLK>;
};
rpm_msg_ram: sram@778000 {