diff options
Diffstat (limited to 'drivers/pmdomain')
| -rw-r--r-- | drivers/pmdomain/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/pmdomain/arm/Kconfig | 37 | ||||
| -rw-r--r-- | drivers/pmdomain/arm/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pmdomain/arm/scpi_pm_domain.c | 157 | ||||
| -rw-r--r-- | drivers/pmdomain/qcom/rpmhpd.c | 12 |
5 files changed, 202 insertions, 6 deletions
diff --git a/drivers/pmdomain/Kconfig b/drivers/pmdomain/Kconfig index c98c5bf75a14..23c64851a5b0 100644 --- a/drivers/pmdomain/Kconfig +++ b/drivers/pmdomain/Kconfig @@ -4,6 +4,7 @@ menu "PM Domains" source "drivers/pmdomain/actions/Kconfig" source "drivers/pmdomain/amlogic/Kconfig" source "drivers/pmdomain/apple/Kconfig" +source "drivers/pmdomain/arm/Kconfig" source "drivers/pmdomain/bcm/Kconfig" source "drivers/pmdomain/imx/Kconfig" source "drivers/pmdomain/mediatek/Kconfig" diff --git a/drivers/pmdomain/arm/Kconfig b/drivers/pmdomain/arm/Kconfig new file mode 100644 index 000000000000..efa139c34e08 --- /dev/null +++ b/drivers/pmdomain/arm/Kconfig @@ -0,0 +1,37 @@ +# SPDX-License-Identifier: GPL-2.0-only +config ARM_SCMI_PERF_DOMAIN + tristate "SCMI performance domain driver" + depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF) + default y + select PM_GENERIC_DOMAINS if PM + help + This enables support for the SCMI performance domains which can be + enabled or disabled via the SCP firmware. + + This driver can also be built as a module. If so, the module will be + called scmi_perf_domain. + +config ARM_SCMI_POWER_DOMAIN + tristate "SCMI power domain driver" + depends on ARM_SCMI_PROTOCOL || (COMPILE_TEST && OF) + default y + select PM_GENERIC_DOMAINS if PM + help + This enables support for the SCMI power domains which can be + enabled or disabled via the SCP firmware + + This driver can also be built as a module. If so, the module + will be called scmi_pm_domain. Note this may needed early in boot + before rootfs may be available. + +config ARM_SCPI_POWER_DOMAIN + tristate "SCPI power domain driver" + depends on ARM_SCPI_PROTOCOL || (COMPILE_TEST && OF) + default y + select PM_GENERIC_DOMAINS if PM + help + This enables support for the SCPI power domains which can be + enabled or disabled via the SCP firmware + + This driver can also be built as a module. If so, the module will be + called scpi_pm_domain. diff --git a/drivers/pmdomain/arm/Makefile b/drivers/pmdomain/arm/Makefile index cfcb1f6cdd90..502fe4d0a83e 100644 --- a/drivers/pmdomain/arm/Makefile +++ b/drivers/pmdomain/arm/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_ARM_SCMI_PERF_DOMAIN) += scmi_perf_domain.o obj-$(CONFIG_ARM_SCMI_POWER_DOMAIN) += scmi_pm_domain.o +obj-$(CONFIG_ARM_SCPI_POWER_DOMAIN) += scpi_pm_domain.o diff --git a/drivers/pmdomain/arm/scpi_pm_domain.c b/drivers/pmdomain/arm/scpi_pm_domain.c new file mode 100644 index 000000000000..2231e6dd2070 --- /dev/null +++ b/drivers/pmdomain/arm/scpi_pm_domain.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * SCPI Generic power domain support. + * + * Copyright (C) 2016 ARM Ltd. + */ + +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/scpi_protocol.h> + +struct scpi_pm_domain { + struct generic_pm_domain genpd; + struct scpi_ops *ops; + u32 domain; +}; + +/* + * These device power state values are not well-defined in the specification. + * In case, different implementations use different values, we can make these + * specific to compatibles rather than getting these values from device tree. + */ +enum scpi_power_domain_state { + SCPI_PD_STATE_ON = 0, + SCPI_PD_STATE_OFF = 3, +}; + +#define to_scpi_pd(gpd) container_of(gpd, struct scpi_pm_domain, genpd) + +static int scpi_pd_power(struct scpi_pm_domain *pd, bool power_on) +{ + int ret; + enum scpi_power_domain_state state; + + if (power_on) + state = SCPI_PD_STATE_ON; + else + state = SCPI_PD_STATE_OFF; + + ret = pd->ops->device_set_power_state(pd->domain, state); + if (ret) + return ret; + + return !(state == pd->ops->device_get_power_state(pd->domain)); +} + +static int scpi_pd_power_on(struct generic_pm_domain *domain) +{ + struct scpi_pm_domain *pd = to_scpi_pd(domain); + + return scpi_pd_power(pd, true); +} + +static int scpi_pd_power_off(struct generic_pm_domain *domain) +{ + struct scpi_pm_domain *pd = to_scpi_pd(domain); + + return scpi_pd_power(pd, false); +} + +static int scpi_pm_domain_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct scpi_pm_domain *scpi_pd; + struct genpd_onecell_data *scpi_pd_data; + struct generic_pm_domain **domains; + struct scpi_ops *scpi_ops; + int ret, num_domains, i; + + scpi_ops = get_scpi_ops(); + if (!scpi_ops) + return -EPROBE_DEFER; + + if (!np) { + dev_err(dev, "device tree node not found\n"); + return -ENODEV; + } + + if (!scpi_ops->device_set_power_state || + !scpi_ops->device_get_power_state) { + dev_err(dev, "power domains not supported in the firmware\n"); + return -ENODEV; + } + + ret = of_property_read_u32(np, "num-domains", &num_domains); + if (ret) { + dev_err(dev, "number of domains not found\n"); + return -EINVAL; + } + + scpi_pd = devm_kcalloc(dev, num_domains, sizeof(*scpi_pd), GFP_KERNEL); + if (!scpi_pd) + return -ENOMEM; + + scpi_pd_data = devm_kzalloc(dev, sizeof(*scpi_pd_data), GFP_KERNEL); + if (!scpi_pd_data) + return -ENOMEM; + + domains = devm_kcalloc(dev, num_domains, sizeof(*domains), GFP_KERNEL); + if (!domains) + return -ENOMEM; + + for (i = 0; i < num_domains; i++, scpi_pd++) { + domains[i] = &scpi_pd->genpd; + + scpi_pd->domain = i; + scpi_pd->ops = scpi_ops; + scpi_pd->genpd.name = devm_kasprintf(dev, GFP_KERNEL, + "%pOFn.%d", np, i); + if (!scpi_pd->genpd.name) { + dev_err(dev, "Failed to allocate genpd name:%pOFn.%d\n", + np, i); + continue; + } + scpi_pd->genpd.power_off = scpi_pd_power_off; + scpi_pd->genpd.power_on = scpi_pd_power_on; + + /* + * Treat all power domains as off at boot. + * + * The SCP firmware itself may have switched on some domains, + * but for reference counting purpose, keep it this way. + */ + pm_genpd_init(&scpi_pd->genpd, NULL, true); + } + + scpi_pd_data->domains = domains; + scpi_pd_data->num_domains = num_domains; + + of_genpd_add_provider_onecell(np, scpi_pd_data); + + return 0; +} + +static const struct of_device_id scpi_power_domain_ids[] = { + { .compatible = "arm,scpi-power-domains", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, scpi_power_domain_ids); + +static struct platform_driver scpi_power_domain_driver = { + .driver = { + .name = "scpi_power_domain", + .of_match_table = scpi_power_domain_ids, + }, + .probe = scpi_pm_domain_probe, +}; +module_platform_driver(scpi_power_domain_driver); + +MODULE_AUTHOR("Sudeep Holla <sudeep.holla@arm.com>"); +MODULE_DESCRIPTION("ARM SCPI power domain driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/pmdomain/qcom/rpmhpd.c b/drivers/pmdomain/qcom/rpmhpd.c index f2e64324deb8..3078896b1300 100644 --- a/drivers/pmdomain/qcom/rpmhpd.c +++ b/drivers/pmdomain/qcom/rpmhpd.c @@ -598,8 +598,8 @@ static const struct rpmhpd_desc sc8280xp_desc = { .num_pds = ARRAY_SIZE(sc8280xp_rpmhpds), }; -/* SC8380xp RPMH powerdomains */ -static struct rpmhpd *sc8380xp_rpmhpds[] = { +/* X1E80100 RPMH powerdomains */ +static struct rpmhpd *x1e80100_rpmhpds[] = { [RPMHPD_CX] = &cx, [RPMHPD_CX_AO] = &cx_ao, [RPMHPD_EBI] = &ebi, @@ -615,9 +615,9 @@ static struct rpmhpd *sc8380xp_rpmhpds[] = { [RPMHPD_GMXC] = &gmxc, }; -static const struct rpmhpd_desc sc8380xp_desc = { - .rpmhpds = sc8380xp_rpmhpds, - .num_pds = ARRAY_SIZE(sc8380xp_rpmhpds), +static const struct rpmhpd_desc x1e80100_desc = { + .rpmhpds = x1e80100_rpmhpds, + .num_pds = ARRAY_SIZE(x1e80100_rpmhpds), }; static const struct of_device_id rpmhpd_match_table[] = { @@ -629,7 +629,6 @@ static const struct of_device_id rpmhpd_match_table[] = { { .compatible = "qcom,sc7280-rpmhpd", .data = &sc7280_desc }, { .compatible = "qcom,sc8180x-rpmhpd", .data = &sc8180x_desc }, { .compatible = "qcom,sc8280xp-rpmhpd", .data = &sc8280xp_desc }, - { .compatible = "qcom,sc8380xp-rpmhpd", .data = &sc8380xp_desc }, { .compatible = "qcom,sdm670-rpmhpd", .data = &sdm670_desc }, { .compatible = "qcom,sdm845-rpmhpd", .data = &sdm845_desc }, { .compatible = "qcom,sdx55-rpmhpd", .data = &sdx55_desc}, @@ -643,6 +642,7 @@ static const struct of_device_id rpmhpd_match_table[] = { { .compatible = "qcom,sm8450-rpmhpd", .data = &sm8450_desc }, { .compatible = "qcom,sm8550-rpmhpd", .data = &sm8550_desc }, { .compatible = "qcom,sm8650-rpmhpd", .data = &sm8650_desc }, + { .compatible = "qcom,x1e80100-rpmhpd", .data = &x1e80100_desc }, { } }; MODULE_DEVICE_TABLE(of, rpmhpd_match_table); |