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SubjectRe: [PATCH v2 6/6] clk: samsung: exynos5433: Extract PM support to common ARM64 layer
On 19.02.2023 18:36, Sam Protsenko wrote:
> On Wed, 8 Feb 2023 at 17:43, Sam Protsenko <> wrote:
>> Exynos5433 clock driver implements PM support internally, which might be
>> also useful for other Exynos clock drivers. Extract all PM related code
>> from clk-exynos5433 to common ARM64 functions.
>> Tested-by: Marek Szyprowski <>
>> Signed-off-by: Sam Protsenko <>
>> ---
>> Changes in v2:
>> - Rebased on top of latest soc/for-next tree
>> - Included linux/slab.h for kfree (found by kernel test robot)
>> drivers/clk/samsung/clk-exynos-arm64.c | 171 ++++++++++++++++++++++++-
>> drivers/clk/samsung/clk-exynos-arm64.h | 3 +
>> drivers/clk/samsung/clk-exynos5433.c | 157 +----------------------
>> 3 files changed, 175 insertions(+), 156 deletions(-)
>> diff --git a/drivers/clk/samsung/clk-exynos-arm64.c b/drivers/clk/samsung/clk-exynos-arm64.c
>> index 2aa3f0a5644e..7ad7fd353dda 100644
>> --- a/drivers/clk/samsung/clk-exynos-arm64.c
>> +++ b/drivers/clk/samsung/clk-exynos-arm64.c
>> @@ -10,6 +10,9 @@
>> */
> Hi Marek,
> It just occurred to me that as I'm pulling your code from
> clk-exynos5433.c here, I should've probably added you to this file's
> author list in the header comment. Does that sound right to you? If
> so, I can re-send v3 with fixes.

Fine for me.

> Also, could you please review this series, if possible? I'm working
> right now on PM_DOMAINS support for Exynos850, so along with this
> series that would bring the initial PM support for ARM64 Exynos chips.

Well, feel free to add:

Acked-by: Marek Szyprowski <>

to v3 (the whole patchset).

The only remark I have is not strictly related to this patchset, but the
code that is already in drivers/clk/samsung/clk-exynos-arm64.c. Playing
with GATE_ENABLE_HWACG/GATE_MANUAL is not strictly specific to all
Exynos ARM64 SoCs. GATE_OFF_START/GATE_OFF_END and the enable register
bits are something specific to recent Exynos SoCs (like 7885/850/auto9)
and don't fit well into the generic arm64 clk PM code, but I don't have
a good idea how to move it to the respective clk drivers and keep it simple.

Best regards
Marek Szyprowski, PhD
Samsung R&D Institute Poland

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