[PATCH v2 0/3] Mark clocks as critical for MT6797

matthias.bgg
2018-11-16T18:09:20Z

From: Matthias Brugger <mbrugger@suse.com>

Jasper send this series some month ago. As there was no reaction from
his side, I'll do a friendly take-over.
I tested the patches on my Helios X20 boards and they fix the issue.
I didn't add a Tested-by tag as I added my Signed-off-by.

Changes since v1:
- add a fixes tag.

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Currently, DRAM-related clocks and the axi_sel MUX are not marked with
CLK_IS_CRITICAL for MT6797. This causes memory corruption when the
system is booted without clk_ignore_unused.

This patchset

1. Makes it possible to mark outputs of MUXes as critical by introducing
a new macro, MUX_FLAGS,
2. Makes it possible to mark gates as critical by adding flags to
mtk_gate, and
3. Marks axi_sel, ddrphycfg_sel, infra_dramc_f26m and infra_dramc_b_f26m
as critical.

The addition of flags to mtk_gate also exists in the patch series "Add
basic and clock support for Mediatek MT8183 SoC" [1]. The type of
flags is unsigned int in that series, but the real type is unsigned
long, so my patch differs from that patch.

[1] https://patchwork.kernel.org/patch/10549953/

Jasper Mattsson (3):
clk: mediatek: Add MUX_FLAGS macro
clk: mediatek: Add flags to mtk_gate
clk: mediatek: Mark bus and DRAM related clocks as critical

drivers/clk/mediatek/clk-gate.c | 4 +-
drivers/clk/mediatek/clk-gate.h | 3 +-
drivers/clk/mediatek/clk-mt6797.c | 64 ++++++++++++++++++-------------
drivers/clk/mediatek/clk-mtk.c | 2 +-
drivers/clk/mediatek/clk-mtk.h | 9 ++++-
5 files changed, 50 insertions(+), 32 deletions(-)

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2.19.1