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Diffstat (limited to 'drivers/pmdomain/st/ste-ux500-pm-domain.c')
-rw-r--r--drivers/pmdomain/st/ste-ux500-pm-domain.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/pmdomain/st/ste-ux500-pm-domain.c b/drivers/pmdomain/st/ste-ux500-pm-domain.c
new file mode 100644
index 0000000000..3d4f111ed1
--- /dev/null
+++ b/drivers/pmdomain/st/ste-ux500-pm-domain.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2014 Linaro Ltd.
+ *
+ * Author: Ulf Hansson <ulf.hansson@linaro.org>
+ *
+ * Implements PM domains using the generic PM domain for ux500.
+ */
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/pm_domain.h>
+
+#include <dt-bindings/arm/ux500_pm_domains.h>
+
+static int pd_power_off(struct generic_pm_domain *domain)
+{
+ /*
+ * Handle the gating of the PM domain regulator here.
+ *
+ * Drivers/subsystems handling devices in the PM domain needs to perform
+ * register context save/restore from their respective runtime PM
+ * callbacks, to be able to enable PM domain gating/ungating.
+ */
+ return 0;
+}
+
+static int pd_power_on(struct generic_pm_domain *domain)
+{
+ /*
+ * Handle the ungating of the PM domain regulator here.
+ *
+ * Drivers/subsystems handling devices in the PM domain needs to perform
+ * register context save/restore from their respective runtime PM
+ * callbacks, to be able to enable PM domain gating/ungating.
+ */
+ return 0;
+}
+
+static struct generic_pm_domain ux500_pm_domain_vape = {
+ .name = "VAPE",
+ .power_off = pd_power_off,
+ .power_on = pd_power_on,
+};
+
+static struct generic_pm_domain *ux500_pm_domains[NR_DOMAINS] = {
+ [DOMAIN_VAPE] = &ux500_pm_domain_vape,
+};
+
+static const struct of_device_id ux500_pm_domain_matches[] = {
+ { .compatible = "stericsson,ux500-pm-domains", },
+ { },
+};
+
+static int ux500_pm_domains_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct genpd_onecell_data *genpd_data;
+ int i;
+
+ 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, false);
+
+ of_genpd_add_provider_onecell(np, genpd_data);
+ return 0;
+}
+
+static struct platform_driver ux500_pm_domains_driver = {
+ .probe = ux500_pm_domains_probe,
+ .driver = {
+ .name = "ux500_pm_domains",
+ .of_match_table = ux500_pm_domain_matches,
+ },
+};
+
+static int __init ux500_pm_domains_init(void)
+{
+ return platform_driver_register(&ux500_pm_domains_driver);
+}
+arch_initcall(ux500_pm_domains_init);