diff options
| -rw-r--r-- | drivers/soc/qcom/qcom-geni-se.c | 70 | ||||
| -rw-r--r-- | include/linux/soc/qcom/geni-se.h | 4 |
2 files changed, 74 insertions, 0 deletions
diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c index 2e41595ff912..6e58568701b0 100644 --- a/drivers/soc/qcom/qcom-geni-se.c +++ b/drivers/soc/qcom/qcom-geni-se.c @@ -1026,6 +1026,76 @@ int geni_icc_disable(struct geni_se *se) EXPORT_SYMBOL_GPL(geni_icc_disable); /** + * geni_se_resources_deactivate() - Deactivate GENI SE device resources + * @se: Pointer to the geni_se structure + * + * Deactivates device resources for power saving: OPP rate to 0, pin control + * to sleep state, turns off clocks, and disables interconnect. Skips ACPI devices. + * + * Return: 0 on success, negative error code on failure + */ +int geni_se_resources_deactivate(struct geni_se *se) +{ + int ret; + + if (has_acpi_companion(se->dev)) + return 0; + + if (se->has_opp) + dev_pm_opp_set_rate(se->dev, 0); + + ret = pinctrl_pm_select_sleep_state(se->dev); + if (ret) + return ret; + + geni_se_clks_off(se); + + return geni_icc_disable(se); +} +EXPORT_SYMBOL_GPL(geni_se_resources_deactivate); + +/** + * geni_se_resources_activate() - Activate GENI SE device resources + * @se: Pointer to the geni_se structure + * + * Activates device resources for operation: enables interconnect, prepares clocks, + * and sets pin control to default state. Includes error cleanup. Skips ACPI devices. + * + * Unlike geni_se_resources_deactivate(), this function doesn't alter the + * connected genpds' performance states, which must be additionally handled. + * + * Return: 0 on success, negative error code on failure + */ +int geni_se_resources_activate(struct geni_se *se) +{ + int ret; + + if (has_acpi_companion(se->dev)) + return 0; + + ret = geni_icc_enable(se); + if (ret) + return ret; + + ret = geni_se_clks_on(se); + if (ret) + goto out_icc_disable; + + ret = pinctrl_pm_select_default_state(se->dev); + if (ret) { + geni_se_clks_off(se); + goto out_icc_disable; + } + + return 0; + +out_icc_disable: + geni_icc_disable(se); + return ret; +} +EXPORT_SYMBOL_GPL(geni_se_resources_activate); + +/** * geni_se_resources_init() - Initialize resources for a GENI SE device. * @se: Pointer to the geni_se structure representing the GENI SE device. * diff --git a/include/linux/soc/qcom/geni-se.h b/include/linux/soc/qcom/geni-se.h index c182dd0f0bde..36a68149345c 100644 --- a/include/linux/soc/qcom/geni-se.h +++ b/include/linux/soc/qcom/geni-se.h @@ -541,6 +541,10 @@ int geni_icc_disable(struct geni_se *se); int geni_se_resources_init(struct geni_se *se); +int geni_se_resources_activate(struct geni_se *se); + +int geni_se_resources_deactivate(struct geni_se *se); + int geni_load_se_firmware(struct geni_se *se, enum geni_se_protocol_type protocol); #endif #endif |