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Gabor Juhos 26dae7a6c0 clk: qcom: clk-alpha-pll: fix alpha mode configuration 
commit 33f1722eb8 upstream.

Commit c45ae598fc ("clk: qcom: support for alpha mode configuration")
added support for configuring alpha mode, but it seems that the feature
was never working in practice.

The value of the alpha_{en,mode}_mask members of the configuration gets
added to the value parameter passed to the regmap_update_bits() function,
however the same values are not getting applied to the bitmask. As the
result, the respective bits in the USER_CTL register are never modifed
which leads to improper configuration of several PLLs.

The following table shows the PLL configurations where the 'alpha_en_mask'
member is set and which are passed as a parameter for the
clk_alpha_pll_configure() function. In the table the 'expected rate' column
shows the rate the PLL should run at with the given configuration, and
the 'real rate' column shows the rate the PLL runs at actually. The real
rates has been verified on hardwareOn IPQ* platforms, on other platforms,
those are computed values only.

      file                 pll         expected rate   real rate
  dispcc-qcm2290.c     disp_cc_pll0      768.0 MHz     768.0 MHz
  dispcc-sm6115.c      disp_cc_pll0      768.0 MHz     768.0 MHz
  gcc-ipq5018.c        ubi32_pll        1000.0 MHz !=  984.0 MHz
  gcc-ipq6018.c        nss_crypto_pll   1200.0 MHz    1200.0 MHz
  gcc-ipq6018.c        ubi32_pll        1497.6 MHz != 1488.0 MHz
  gcc-ipq8074.c        nss_crypto_pll   1200.0 MHz != 1190.4 MHz
  gcc-qcm2290.c        gpll11            532.0 MHz !=  518.4 MHz
  gcc-qcm2290.c        gpll8             533.2 MHz !=  518.4 MHz
  gcc-qcs404.c         gpll3             921.6 MHz     921.6 MHz
  gcc-sm6115.c         gpll11            600.0 MHz !=  595.2 MHz
  gcc-sm6115.c         gpll8             800.0 MHz !=  787.2 MHz
  gpucc-sdm660.c       gpu_cc_pll0       800.0 MHz !=  787.2 MHz
  gpucc-sdm660.c       gpu_cc_pll1       740.0 MHz !=  729.6 MHz
  gpucc-sm6115.c       gpu_cc_pll0      1200.0 MHz != 1190.4 MHz
  gpucc-sm6115.c       gpu_cc_pll1       640.0 MHz !=  633.6 MHz
  gpucc-sm6125.c       gpu_pll0         1020.0 MHz != 1017.6 MHz
  gpucc-sm6125.c       gpu_pll1          930.0 MHz !=  921.6 MHz
  mmcc-sdm660.c        mmpll8            930.0 MHz !=  921.6 MHz
  mmcc-sdm660.c        mmpll5            825.0 MHz !=  806.4 MHz

As it can be seen from the above, there are several PLLs which are
configured incorrectly.

Change the code to apply both 'alpha_en_mask' and 'alpha_mode_mask'
values to the bitmask in order to configure the alpha mode correctly.

Applying the 'alpha_en_mask' fixes the initial rate of the PLLs showed
in the table above. Since the 'alpha_mode_mask' is not used by any driver
currently, that part of the change causes no functional changes.

Cc: stable@vger.kernel.org
Fixes: c45ae598fc ("clk: qcom: support for alpha mode configuration")
Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Gabor Juhos <j4g8y7@gmail.com>
Link: https://lore.kernel.org/r/20241021-fix-alpha-mode-config-v1-1-f32c254e02bc@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-02-17 10:05:10 +01:00
arch KVM: s390: vsie: fix some corner-cases when grabbing vsie pages 2025-02-17 10:05:06 +01:00
block partitions: ldm: remove the initial kernel-doc notation 2025-02-08 09:56:52 +01:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: api - Fix boot-up self-test race 2025-02-08 09:57:28 +01:00
Documentation arm64: Filter out SVE hwcaps when FEAT_SVE isn't implemented 2025-02-17 10:05:04 +01:00
drivers clk: qcom: clk-alpha-pll: fix alpha mode configuration 2025-02-17 10:05:10 +01:00
fs ksmbd: fix integer overflows on 32 bit systems 2025-02-17 10:05:06 +01:00
include drm/amdgpu: add a BO metadata flag to disable write compression for Vulkan 2025-02-17 10:05:09 +01:00
init Compiler Attributes: disable __counted_by for clang < 19.1.3 2024-12-05 14:02:45 +01:00
io_uring io_uring/uring_cmd: use cached cmd_op in io_uring_cmd_sock() 2025-02-08 09:58:10 +01:00
ipc ipc: fix memleak if msg_init_ns failed in create_ipc_ns 2024-12-05 14:03:02 +01:00
kernel sched/fair: Fix inaccurate h_nr_runnable accounting with delayed dequeue 2025-02-17 10:04:57 +01:00
lib lockdep: Fix upper limit for LOCKDEP_*_BITS configs 2025-02-17 10:04:44 +01:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm memcg: fix soft lockup in the OOM process 2025-02-08 09:58:19 +01:00
net Bluetooth: L2CAP: accept zero as a special value for MTU auto-selection 2025-02-17 10:05:09 +01:00
rust rust: kbuild: set bindgen's Rust target version 2024-12-19 18:13:22 +01:00
samples samples/landlock: Fix possible NULL dereference in parse_path() 2025-02-08 09:57:11 +01:00
scripts kbuild: switch from lz4c to lz4 for compression 2025-02-08 09:58:12 +01:00
security KEYS: trusted: dcp: fix improper sg use with CONFIG_VMAP_STACK=y 2025-02-17 10:05:09 +01:00
sound ALSA: hda/realtek: Enable Mute LED on HP Laptop 14s-fq1xxx 2025-02-17 10:05:03 +01:00
tools udp: gso: do not drop small packets when PMTU reduces 2025-02-17 10:05:00 +01:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt KVM: x86: switch hugepage recovery thread to vhost_task 2024-12-05 14:02:43 +01:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove self from DSA entry 2024-11-03 12:52:38 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: update location of media main tree 2024-12-05 14:02:42 +01:00
Makefile Linux 6.12.13 2025-02-08 09:58:20 +01:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.