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| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2023-10-12 19:21:27 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-10-17 02:59:21 +0200 |
| commit | 72208ebe181e38678dce753354233acf0cc5422b (patch) | |
| tree | 470d5fcab61dd251057c39fa67d9a5a64efe7426 /include/ufs | |
| parent | scsi: ufs: core: Add OPP support for scaling clocks and regulators (diff) | |
| download | linux-72208ebe181e38678dce753354233acf0cc5422b.tar.xz linux-72208ebe181e38678dce753354233acf0cc5422b.zip | |
scsi: ufs: core: Add support for parsing OPP
OPP framework can be used to scale the clocks along with other entities
such as regulators, performance state etc... So let's add support for
parsing OPP from devicetree. OPP support in devicetree is added through the
"operating-points-v2" property which accepts the OPP table defining clock
frequency, regulator voltage, power domain performance state etc...
Since the UFS controller requires multiple clocks to be controlled for
proper working, devm_pm_opp_set_config() has been used which supports
scaling multiple clocks through custom ufshcd_opp_config_clks() callback.
It should be noted that the OPP support is not compatible with the old
"freq-table-hz" property. So only one can be used at a time even though
the UFS core supports both.
Co-developed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20231012172129.65172-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include/ufs')
| -rw-r--r-- | include/ufs/ufshcd.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index fc0d6d37319a..7f0b2c5599cd 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -1254,6 +1254,9 @@ void ufshcd_mcq_make_queues_operational(struct ufs_hba *hba); void ufshcd_mcq_enable_esi(struct ufs_hba *hba); void ufshcd_mcq_config_esi(struct ufs_hba *hba, struct msi_msg *msg); +int ufshcd_opp_config_clks(struct device *dev, struct opp_table *opp_table, + struct dev_pm_opp *opp, void *data, + bool scaling_down); /** * ufshcd_set_variant - set variant specific data to the hba * @hba: per adapter instance |