static int __init tegra_init_pm_domain(void)
{
pm_genpd_init(&tegra_mc_clk.gpd, &simple_qos_governor, false);
pm_genpd_init(&tegra_nvavp.gpd, &simple_qos_governor, true);
tegra_pd_add_sd(&tegra_nvavp.gpd);
return 0;
}
static int __init cpg_mssr_add_clk_domain(struct device *dev,
const unsigned int *core_pm_clks,
unsigned int num_core_pm_clks)
{
struct device_node *np = dev->of_node;
struct generic_pm_domain *genpd;
struct cpg_mssr_clk_domain *pd;
size_t pm_size = num_core_pm_clks * sizeof(core_pm_clks[0]);
pd = devm_kzalloc(dev, sizeof(*pd) + pm_size, GFP_KERNEL);
if (!pd)
return -ENOMEM;
pd->np = np;
pd->num_core_pm_clks = num_core_pm_clks;
memcpy(pd->core_pm_clks, core_pm_clks, pm_size);
genpd = &pd->genpd;
genpd->name = np->name;
genpd->flags = GENPD_FLAG_PM_CLK;
genpd->attach_dev = cpg_mssr_attach_dev;
genpd->detach_dev = cpg_mssr_detach_dev;
pm_genpd_init(genpd, &pm_domain_always_on_gov, false);
cpg_mssr_clk_domain = pd;
of_genpd_add_provider_simple(np, genpd);
return 0;
}
static void mtk_register_power_domains(struct platform_device *pdev,
struct scp *scp, int num)
{
struct genpd_onecell_data *pd_data;
int i, ret;
for (i = 0; i < num; i++) {
struct scp_domain *scpd = &scp->domains[i];
struct generic_pm_domain *genpd = &scpd->genpd;
/*
* Initially turn on all domains to make the domains usable
* with !CONFIG_PM and to get the hardware in sync with the
* software. The unused domains will be switched off during
* late_init time.
*/
genpd->power_on(genpd);
pm_genpd_init(genpd, NULL, false);
}
/*
* We are not allowed to fail here since there is no way to unregister
* a power domain. Once registered above we have to keep the domains
* valid.
*/
pd_data = &scp->pd_data;
ret = of_genpd_add_provider_onecell(pdev->dev.of_node, pd_data);
if (ret)
dev_err(&pdev->dev, "Failed to add OF provider: %d\n", ret);
}
void r8a7779_init_pm_domain(struct r8a7779_pm_domain *r8a7779_pd)
{
struct generic_pm_domain *genpd = &r8a7779_pd->genpd;
pm_genpd_init(genpd, NULL, false);
genpd->dev_ops.stop = pm_clk_suspend;
genpd->dev_ops.start = pm_clk_resume;
genpd->dev_ops.active_wakeup = pd_active_wakeup;
genpd->dev_irq_safe = true;
genpd->power_off = pd_power_down;
genpd->power_on = pd_power_up;
if (pd_is_off(&r8a7779_pd->genpd))
pd_power_up(&r8a7779_pd->genpd);
}
static int gdsc_init(struct gdsc *sc)
{
u32 mask, val;
int on, ret;
unsigned int reg;
/*
* Disable HW trigger: collapse/restore occur based on registers writes.
* Disable SW override: Use hardware state-machine for sequencing.
* Configure wait time between states.
*/
mask = HW_CONTROL_MASK | SW_OVERRIDE_MASK |
EN_REST_WAIT_MASK | EN_FEW_WAIT_MASK | CLK_DIS_WAIT_MASK;
val = EN_REST_WAIT_VAL | EN_FEW_WAIT_VAL | CLK_DIS_WAIT_VAL;
ret = regmap_update_bits(sc->regmap, sc->gdscr, mask, val);
if (ret)
return ret;
/* Force gdsc ON if only ON state is supported */
if (sc->pwrsts == PWRSTS_ON) {
ret = gdsc_toggle_logic(sc, true);
if (ret)
return ret;
}
reg = sc->gds_hw_ctrl ? sc->gds_hw_ctrl : sc->gdscr;
on = gdsc_is_enabled(sc, reg);
if (on < 0)
return on;
/*
* Votable GDSCs can be ON due to Vote from other masters.
* If a Votable GDSC is ON, make sure we have a Vote.
*/
if ((sc->flags & VOTABLE) && on)
gdsc_enable(&sc->pd);
if (on || (sc->pwrsts & PWRSTS_RET))
gdsc_force_mem_on(sc);
else
gdsc_clear_mem_on(sc);
sc->pd.power_off = gdsc_disable;
sc->pd.power_on = gdsc_enable;
pm_genpd_init(&sc->pd, NULL, !on);
return 0;
}
static int gdsc_init(struct gdsc *sc)
{
u32 mask, val;
int on, ret;
/*
* Disable HW trigger: collapse/restore occur based on registers writes.
* Disable SW override: Use hardware state-machine for sequencing.
* Configure wait time between states.
*/
mask = HW_CONTROL_MASK | SW_OVERRIDE_MASK |
EN_REST_WAIT_MASK | EN_FEW_WAIT_MASK | CLK_DIS_WAIT_MASK;
val = EN_REST_WAIT_VAL | EN_FEW_WAIT_VAL | CLK_DIS_WAIT_VAL;
ret = regmap_update_bits(sc->regmap, sc->gdscr, mask, val);
if (ret)
return ret;
/* Force gdsc ON if only ON state is supported */
if (sc->pwrsts == PWRSTS_ON) {
ret = gdsc_toggle_logic(sc, true);
if (ret)
return ret;
}
on = gdsc_is_enabled(sc);
if (on < 0)
return on;
if (on || (sc->pwrsts & PWRSTS_RET))
gdsc_force_mem_on(sc);
else
gdsc_clear_mem_on(sc);
sc->pd.power_off = gdsc_disable;
sc->pd.power_on = gdsc_enable;
sc->pd.attach_dev = gdsc_attach;
sc->pd.detach_dev = gdsc_detach;
sc->pd.flags = GENPD_FLAG_PM_CLK;
pm_genpd_init(&sc->pd, NULL, !on);
return 0;
}
static int owl_sps_init_domain(struct owl_sps *sps, int index)
{
struct owl_sps_domain *pd;
pd = devm_kzalloc(sps->dev, sizeof(*pd), GFP_KERNEL);
if (!pd)
return -ENOMEM;
pd->info = &sps->info->domains[index];
pd->sps = sps;
pd->genpd.name = pd->info->name;
pd->genpd.power_on = owl_sps_power_on;
pd->genpd.power_off = owl_sps_power_off;
pd->genpd.flags = pd->info->genpd_flags;
pm_genpd_init(&pd->genpd, NULL, false);
sps->genpd_data.domains[index] = &pd->genpd;
return 0;
}
void sh7372_init_pm_domain(struct sh7372_pm_domain *sh7372_pd)
{
struct generic_pm_domain *genpd = &sh7372_pd->genpd;
pm_genpd_init(genpd, NULL, false);
genpd->stop_device = pm_clk_suspend;
genpd->start_device = pm_clk_resume;
genpd->active_wakeup = pd_active_wakeup;
if (sh7372_pd == &sh7372_a4lc) {
genpd->power_off = pd_power_down_a4lc;
genpd->power_on = pd_power_up;
} else if (sh7372_pd == &sh7372_a3rv) {
genpd->power_off = pd_power_down_a3rv;
genpd->power_on = pd_power_up_a3rv;
} else {
genpd->power_off = pd_power_down;
genpd->power_on = pd_power_up;
}
genpd->power_on(&sh7372_pd->genpd);
}
void __init cpg_mstp_add_clk_domain(struct device_node *np)
{
struct generic_pm_domain *pd;
u32 ncells;
if (of_property_read_u32(np, "#power-domain-cells", &ncells)) {
pr_warn("%pOF lacks #power-domain-cells\n", np);
return;
}
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd)
return;
pd->name = np->name;
pd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP;
pd->attach_dev = cpg_mstp_attach_dev;
pd->detach_dev = cpg_mstp_detach_dev;
pm_genpd_init(pd, &pm_domain_always_on_gov, false);
of_genpd_add_provider_simple(np, pd);
}
static void rpi_common_init_power_domain(struct rpi_power_domains *rpi_domains,
int xlate_index, const char *name)
{
struct rpi_power_domain *dom = &rpi_domains->domains[xlate_index];
dom->fw = rpi_domains->fw;
dom->base.name = name;
dom->base.power_on = rpi_domain_on;
dom->base.power_off = rpi_domain_off;
/*
* Treat all power domains as off at boot.
*
* The firmware itself may be keeping some domains on, but
* from Linux's perspective all we control is the refcounts
* that we give to the firmware, and we can't ask the firmware
* to turn off something that we haven't ourselves turned on.
*/
pm_genpd_init(&dom->base, NULL, true);
rpi_domains->xlate.domains[xlate_index] = &dom->base;
}
int __init ux500_pm_domains_init(void)
{
struct device_node *np;
struct genpd_onecell_data *genpd_data;
int i;
np = of_find_matching_node(NULL, ux500_pm_domain_matches);
if (!np)
return -ENODEV;
genpd_data = kzalloc(sizeof(*genpd_data), GFP_KERNEL);
if (!genpd_data)
return -ENOMEM;
genpd_data->domains = ux500_pm_domains;
genpd_data->num_domains = ARRAY_SIZE(ux500_pm_domains);
for (i = 0; i < ARRAY_SIZE(ux500_pm_domains); ++i)
pm_genpd_init(ux500_pm_domains[i], NULL, NULL, 0, false);
of_genpd_add_provider_onecell(np, genpd_data);
return 0;
}
static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
struct device_node *node)
{
const struct rockchip_domain_info *pd_info;
struct rockchip_pm_domain *pd;
struct device_node *qos_node;
int i, j;
u32 id;
int error;
error = of_property_read_u32(node, "reg", &id);
if (error) {
dev_err(pmu->dev,
"%s: failed to retrieve domain id (reg): %d\n",
node->name, error);
return -EINVAL;
}
if (id >= pmu->info->num_domains) {
dev_err(pmu->dev, "%s: invalid domain id %d\n",
node->name, id);
return -EINVAL;
}
pd_info = &pmu->info->domain_info[id];
if (!pd_info) {
dev_err(pmu->dev, "%s: undefined domain id %d\n",
node->name, id);
return -EINVAL;
}
pd = devm_kzalloc(pmu->dev, sizeof(*pd), GFP_KERNEL);
if (!pd)
return -ENOMEM;
pd->info = pd_info;
pd->pmu = pmu;
pd->num_clks = of_clk_get_parent_count(node);
if (pd->num_clks > 0) {
pd->clks = devm_kcalloc(pmu->dev, pd->num_clks,
sizeof(*pd->clks), GFP_KERNEL);
if (!pd->clks)
return -ENOMEM;
} else {
dev_dbg(pmu->dev, "%s: doesn't have clocks: %d\n",
node->name, pd->num_clks);
pd->num_clks = 0;
}
for (i = 0; i < pd->num_clks; i++) {
pd->clks[i].clk = of_clk_get(node, i);
if (IS_ERR(pd->clks[i].clk)) {
error = PTR_ERR(pd->clks[i].clk);
dev_err(pmu->dev,
"%s: failed to get clk at index %d: %d\n",
node->name, i, error);
return error;
}
}
error = clk_bulk_prepare(pd->num_clks, pd->clks);
if (error)
goto err_put_clocks;
pd->num_qos = of_count_phandle_with_args(node, "pm_qos",
NULL);
if (pd->num_qos > 0) {
pd->qos_regmap = devm_kcalloc(pmu->dev, pd->num_qos,
sizeof(*pd->qos_regmap),
GFP_KERNEL);
if (!pd->qos_regmap) {
error = -ENOMEM;
goto err_unprepare_clocks;
}
for (j = 0; j < MAX_QOS_REGS_NUM; j++) {
pd->qos_save_regs[j] = devm_kcalloc(pmu->dev,
pd->num_qos,
sizeof(u32),
GFP_KERNEL);
if (!pd->qos_save_regs[j]) {
error = -ENOMEM;
goto err_unprepare_clocks;
}
}
for (j = 0; j < pd->num_qos; j++) {
qos_node = of_parse_phandle(node, "pm_qos", j);
if (!qos_node) {
error = -ENODEV;
goto err_unprepare_clocks;
}
pd->qos_regmap[j] = syscon_node_to_regmap(qos_node);
if (IS_ERR(pd->qos_regmap[j])) {
error = -ENODEV;
of_node_put(qos_node);
goto err_unprepare_clocks;
}
of_node_put(qos_node);
}
}
error = rockchip_pd_power(pd, true);
if (error) {
dev_err(pmu->dev,
"failed to power on domain '%s': %d\n",
node->name, error);
goto err_unprepare_clocks;
}
pd->genpd.name = node->name;
pd->genpd.power_off = rockchip_pd_power_off;
pd->genpd.power_on = rockchip_pd_power_on;
pd->genpd.attach_dev = rockchip_pd_attach_dev;
pd->genpd.detach_dev = rockchip_pd_detach_dev;
pd->genpd.flags = GENPD_FLAG_PM_CLK;
if (pd_info->active_wakeup)
pd->genpd.flags |= GENPD_FLAG_ACTIVE_WAKEUP;
pm_genpd_init(&pd->genpd, NULL, false);
pmu->genpd_data.domains[id] = &pd->genpd;
return 0;
err_unprepare_clocks:
clk_bulk_unprepare(pd->num_clks, pd->clks);
err_put_clocks:
clk_bulk_put(pd->num_clks, pd->clks);
return error;
}
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;
sprintf(scpi_pd->name, "%pOFn.%d", np, i);
scpi_pd->genpd.name = scpi_pd->name;
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 int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
struct device_node *node)
{
const struct rockchip_domain_info *pd_info;
struct rockchip_pm_domain *pd;
struct device_node *qos_node;
struct clk *clk;
int clk_cnt;
int i, j;
u32 id;
int error;
error = of_property_read_u32(node, "reg", &id);
if (error) {
dev_err(pmu->dev,
"%s: failed to retrieve domain id (reg): %d\n",
node->name, error);
return -EINVAL;
}
if (id >= pmu->info->num_domains) {
dev_err(pmu->dev, "%s: invalid domain id %d\n",
node->name, id);
return -EINVAL;
}
pd_info = &pmu->info->domain_info[id];
if (!pd_info) {
dev_err(pmu->dev, "%s: undefined domain id %d\n",
node->name, id);
return -EINVAL;
}
clk_cnt = of_count_phandle_with_args(node, "clocks", "#clock-cells");
pd = devm_kzalloc(pmu->dev,
sizeof(*pd) + clk_cnt * sizeof(pd->clks[0]),
GFP_KERNEL);
if (!pd)
return -ENOMEM;
pd->info = pd_info;
pd->pmu = pmu;
for (i = 0; i < clk_cnt; i++) {
clk = of_clk_get(node, i);
if (IS_ERR(clk)) {
error = PTR_ERR(clk);
dev_err(pmu->dev,
"%s: failed to get clk at index %d: %d\n",
node->name, i, error);
goto err_out;
}
error = clk_prepare(clk);
if (error) {
dev_err(pmu->dev,
"%s: failed to prepare clk %pC (index %d): %d\n",
node->name, clk, i, error);
clk_put(clk);
goto err_out;
}
pd->clks[pd->num_clks++] = clk;
dev_dbg(pmu->dev, "added clock '%pC' to domain '%s'\n",
clk, node->name);
}
pd->num_qos = of_count_phandle_with_args(node, "pm_qos",
NULL);
if (pd->num_qos > 0) {
pd->qos_regmap = devm_kcalloc(pmu->dev, pd->num_qos,
sizeof(*pd->qos_regmap),
GFP_KERNEL);
if (!pd->qos_regmap) {
error = -ENOMEM;
goto err_out;
}
for (j = 0; j < MAX_QOS_REGS_NUM; j++) {
pd->qos_save_regs[j] = devm_kcalloc(pmu->dev,
pd->num_qos,
sizeof(u32),
GFP_KERNEL);
if (!pd->qos_save_regs[j]) {
error = -ENOMEM;
goto err_out;
}
}
for (j = 0; j < pd->num_qos; j++) {
qos_node = of_parse_phandle(node, "pm_qos", j);
if (!qos_node) {
error = -ENODEV;
goto err_out;
}
pd->qos_regmap[j] = syscon_node_to_regmap(qos_node);
if (IS_ERR(pd->qos_regmap[j])) {
error = -ENODEV;
of_node_put(qos_node);
goto err_out;
}
of_node_put(qos_node);
}
}
error = rockchip_pd_power(pd, true);
if (error) {
dev_err(pmu->dev,
"failed to power on domain '%s': %d\n",
node->name, error);
goto err_out;
}
pd->genpd.name = node->name;
pd->genpd.power_off = rockchip_pd_power_off;
pd->genpd.power_on = rockchip_pd_power_on;
pd->genpd.attach_dev = rockchip_pd_attach_dev;
pd->genpd.detach_dev = rockchip_pd_detach_dev;
pd->genpd.flags = GENPD_FLAG_PM_CLK;
pm_genpd_init(&pd->genpd, NULL, false);
pmu->genpd_data.domains[id] = &pd->genpd;
return 0;
err_out:
while (--i >= 0) {
clk_unprepare(pd->clks[i]);
clk_put(pd->clks[i]);
}
return error;
}
