Backport OPP Tables for UFS Node
JIRA: https://issues.redhat.com/browse/RHEL-16059
This issue revolves around backporting OPP (Operating Performance Points) tables into CS9 for UFS nodes. OPP tables play a crucial role in dynamically scaling both clocks and regulators/performance states. Each OPP, when present, must contain an array of frequencies stored in a specific order for each clock. If a clock frequency in the array is set to "0", it is assumed that the frequency is determined by the parent clock or a fixed-rate clock source.
The motivation behind incorporating OPP support is to enable the dynamic scaling of both clocks and performance states of power domains. Currently, UFSHCD scales clock frequency during runtime using the "freq-table-hz" property defined in the devicetree. The addition of OPP tables in the devicetree for UFSHCD allows for a more comprehensive approach, scaling both clocks and the performance state of power domains, resulting in enhanced power efficiency.
conflicts stats:
| upstream | downstream | subject | details |
|---|---|---|---|
| b5d281f6c16 | 3100d7a8 | PM / devfreq: Rework freq_table to be local to devfreq struct | Context adjustments in include/linux/devfreq.h hunk#1 to meet modification introduced in 5fdded8448924 |
| e820de1d115 | ed8a3bd7 | scsi: ufs: dt-bindings: common: Add OPP table | fixed due to context diff introduced 4569820881c6e Due to the large number of files it changes, it is inappropriate to backport it. |
| 930bd77ebe3 | d7f49d48 | scsi: ufs: core: Add OPP support for scaling clocks and regulators | fixed due to context diff introduced 3a17fefe0f196 Due to the large number of files it changes, it is inappropriate to backport it. |
| 016b4e5e286 | ebd3cd86 | pmdomain: qcom: cpr: Drop the ->opp_to_performance_state() callback | Didn't follow 2ad626f8f40 on rename files. Restored the old name: drivers/pmdomain/qcom/cpr.c -> drivers/soc/qcom/cpr.c |
| 40d7f4d2e6d | 2b80c30d | pmdomain: qcom: rpmpd: Drop the ->opp_to_performance_state() callback | Didn't follow 2ad626f8f40 on rename files. Restored the old name: drivers/pmdomain/qcom/rpmpd.c -> drivers/soc/qcom/rpmpd.c |
| 55089e1fb2d | b14446ae | pmdomain: qcom: rpmhpd: Drop the ->opp_to_performance_state() callback | Didn't follow 2ad626f8f40 on rename files. Restored the old name: drivers/pmdomain/qcom/rpmhpd.c -> drivers/soc/qcom/rpmhpd.c |
Signed-off-by: Alessandro Carminati acarmina@redhat.com