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-rw-r--r--drivers/power/Kconfig2
-rw-r--r--drivers/power/domain/Kconfig20
-rw-r--r--drivers/power/domain/Makefile7
-rw-r--r--drivers/power/domain/power-domain-uclass.c112
-rw-r--r--drivers/power/domain/sandbox-power-domain-test.c55
-rw-r--r--drivers/power/domain/sandbox-power-domain.c104
6 files changed, 300 insertions, 0 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 3c44167..b422703 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -1,5 +1,7 @@
menu "Power"
+source "drivers/power/domain/Kconfig"
+
source "drivers/power/pmic/Kconfig"
source "drivers/power/regulator/Kconfig"
diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig
new file mode 100644
index 0000000..b904097
--- /dev/null
+++ b/drivers/power/domain/Kconfig
@@ -0,0 +1,20 @@
+menu "Power Domain Support"
+
+config POWER_DOMAIN
+ bool "Enable power domain support using Driver Model"
+ depends on DM && OF_CONTROL
+ help
+ Enable support for the power domain driver class. Many SoCs allow
+ power to be applied to or removed from portions of the SoC (power
+ domains). This may be used to save power. This API provides the
+ means to control such power management hardware.
+
+config SANDBOX_POWER_DOMAIN
+ bool "Enable the sandbox power domain test driver"
+ depends on POWER_DOMAIN && SANDBOX
+ help
+ Enable support for a test power domain driver implementation, which
+ simply accepts requests to power on/off various HW modules without
+ actually doing anything beyond a little error checking.
+
+endmenu
diff --git a/drivers/power/domain/Makefile b/drivers/power/domain/Makefile
new file mode 100644
index 0000000..c18292f
--- /dev/null
+++ b/drivers/power/domain/Makefile
@@ -0,0 +1,7 @@
+# Copyright (c) 2016, NVIDIA CORPORATION.
+#
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_POWER_DOMAIN) += power-domain-uclass.o
+obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain.o
+obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain-test.o
diff --git a/drivers/power/domain/power-domain-uclass.c b/drivers/power/domain/power-domain-uclass.c
new file mode 100644
index 0000000..1bb6262
--- /dev/null
+++ b/drivers/power/domain/power-domain-uclass.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <power-domain.h>
+#include <power-domain-uclass.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static inline struct power_domain_ops *power_domain_dev_ops(struct udevice *dev)
+{
+ return (struct power_domain_ops *)dev->driver->ops;
+}
+
+static int power_domain_of_xlate_default(struct power_domain *power_domain,
+ struct fdtdec_phandle_args *args)
+{
+ debug("%s(power_domain=%p)\n", __func__, power_domain);
+
+ if (args->args_count != 1) {
+ debug("Invalid args_count: %d\n", args->args_count);
+ return -EINVAL;
+ }
+
+ power_domain->id = args->args[0];
+
+ return 0;
+}
+
+int power_domain_get(struct udevice *dev, struct power_domain *power_domain)
+{
+ struct fdtdec_phandle_args args;
+ int ret;
+ struct udevice *dev_power_domain;
+ struct power_domain_ops *ops;
+
+ debug("%s(dev=%p, power_domain=%p)\n", __func__, dev, power_domain);
+
+ ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset,
+ "power-domains",
+ "#power-domain-cells", 0, 0,
+ &args);
+ if (ret) {
+ debug("%s: fdtdec_parse_phandle_with_args failed: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = uclass_get_device_by_of_offset(UCLASS_POWER_DOMAIN, args.node,
+ &dev_power_domain);
+ if (ret) {
+ debug("%s: uclass_get_device_by_of_offset failed: %d\n",
+ __func__, ret);
+ return ret;
+ }
+ ops = power_domain_dev_ops(dev_power_domain);
+
+ power_domain->dev = dev_power_domain;
+ if (ops->of_xlate)
+ ret = ops->of_xlate(power_domain, &args);
+ else
+ ret = power_domain_of_xlate_default(power_domain, &args);
+ if (ret) {
+ debug("of_xlate() failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = ops->request(power_domain);
+ if (ret) {
+ debug("ops->request() failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int power_domain_free(struct power_domain *power_domain)
+{
+ struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
+
+ debug("%s(power_domain=%p)\n", __func__, power_domain);
+
+ return ops->free(power_domain);
+}
+
+int power_domain_on(struct power_domain *power_domain)
+{
+ struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
+
+ debug("%s(power_domain=%p)\n", __func__, power_domain);
+
+ return ops->on(power_domain);
+}
+
+int power_domain_off(struct power_domain *power_domain)
+{
+ struct power_domain_ops *ops = power_domain_dev_ops(power_domain->dev);
+
+ debug("%s(power_domain=%p)\n", __func__, power_domain);
+
+ return ops->off(power_domain);
+}
+
+UCLASS_DRIVER(power_domain) = {
+ .id = UCLASS_POWER_DOMAIN,
+ .name = "power_domain",
+};
diff --git a/drivers/power/domain/sandbox-power-domain-test.c b/drivers/power/domain/sandbox-power-domain-test.c
new file mode 100644
index 0000000..92a3a2a
--- /dev/null
+++ b/drivers/power/domain/sandbox-power-domain-test.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <power-domain.h>
+#include <asm/io.h>
+#include <asm/power-domain.h>
+
+struct sandbox_power_domain_test {
+ struct power_domain pd;
+};
+
+int sandbox_power_domain_test_get(struct udevice *dev)
+{
+ struct sandbox_power_domain_test *sbrt = dev_get_priv(dev);
+
+ return power_domain_get(dev, &sbrt->pd);
+}
+
+int sandbox_power_domain_test_on(struct udevice *dev)
+{
+ struct sandbox_power_domain_test *sbrt = dev_get_priv(dev);
+
+ return power_domain_on(&sbrt->pd);
+}
+
+int sandbox_power_domain_test_off(struct udevice *dev)
+{
+ struct sandbox_power_domain_test *sbrt = dev_get_priv(dev);
+
+ return power_domain_off(&sbrt->pd);
+}
+
+int sandbox_power_domain_test_free(struct udevice *dev)
+{
+ struct sandbox_power_domain_test *sbrt = dev_get_priv(dev);
+
+ return power_domain_free(&sbrt->pd);
+}
+
+static const struct udevice_id sandbox_power_domain_test_ids[] = {
+ { .compatible = "sandbox,power-domain-test" },
+ { }
+};
+
+U_BOOT_DRIVER(sandbox_power_domain_test) = {
+ .name = "sandbox_power_domain_test",
+ .id = UCLASS_MISC,
+ .of_match = sandbox_power_domain_test_ids,
+ .priv_auto_alloc_size = sizeof(struct sandbox_power_domain_test),
+};
diff --git a/drivers/power/domain/sandbox-power-domain.c b/drivers/power/domain/sandbox-power-domain.c
new file mode 100644
index 0000000..9071346
--- /dev/null
+++ b/drivers/power/domain/sandbox-power-domain.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <power-domain-uclass.h>
+#include <asm/io.h>
+#include <asm/power-domain.h>
+
+#define SANDBOX_POWER_DOMAINS 3
+
+struct sandbox_power_domain {
+ bool on[SANDBOX_POWER_DOMAINS];
+};
+
+static int sandbox_power_domain_request(struct power_domain *power_domain)
+{
+ debug("%s(power_domain=%p)\n", __func__, power_domain);
+
+ if (power_domain->id >= SANDBOX_POWER_DOMAINS)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int sandbox_power_domain_free(struct power_domain *power_domain)
+{
+ debug("%s(power_domain=%p)\n", __func__, power_domain);
+
+ return 0;
+}
+
+static int sandbox_power_domain_on(struct power_domain *power_domain)
+{
+ struct sandbox_power_domain *sbr = dev_get_priv(power_domain->dev);
+
+ debug("%s(power_domain=%p)\n", __func__, power_domain);
+
+ sbr->on[power_domain->id] = true;
+
+ return 0;
+}
+
+static int sandbox_power_domain_off(struct power_domain *power_domain)
+{
+ struct sandbox_power_domain *sbr = dev_get_priv(power_domain->dev);
+
+ debug("%s(power_domain=%p)\n", __func__, power_domain);
+
+ sbr->on[power_domain->id] = false;
+
+ return 0;
+}
+
+static int sandbox_power_domain_bind(struct udevice *dev)
+{
+ debug("%s(dev=%p)\n", __func__, dev);
+
+ return 0;
+}
+
+static int sandbox_power_domain_probe(struct udevice *dev)
+{
+ debug("%s(dev=%p)\n", __func__, dev);
+
+ return 0;
+}
+
+static const struct udevice_id sandbox_power_domain_ids[] = {
+ { .compatible = "sandbox,power-domain" },
+ { }
+};
+
+struct power_domain_ops sandbox_power_domain_ops = {
+ .request = sandbox_power_domain_request,
+ .free = sandbox_power_domain_free,
+ .on = sandbox_power_domain_on,
+ .off = sandbox_power_domain_off,
+};
+
+U_BOOT_DRIVER(sandbox_power_domain) = {
+ .name = "sandbox_power_domain",
+ .id = UCLASS_POWER_DOMAIN,
+ .of_match = sandbox_power_domain_ids,
+ .bind = sandbox_power_domain_bind,
+ .probe = sandbox_power_domain_probe,
+ .priv_auto_alloc_size = sizeof(struct sandbox_power_domain),
+ .ops = &sandbox_power_domain_ops,
+};
+
+int sandbox_power_domain_query(struct udevice *dev, unsigned long id)
+{
+ struct sandbox_power_domain *sbr = dev_get_priv(dev);
+
+ debug("%s(dev=%p, id=%ld)\n", __func__, dev, id);
+
+ if (id >= SANDBOX_POWER_DOMAINS)
+ return -EINVAL;
+
+ return sbr->on[id];
+}
generated by cgit v1.1 at 2024-12-24 18:23:36 +0000