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Add a power domain framework/uclass

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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.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Stephen Warren
2016-07-13 13:45:31 -06:00
committed by Simon Glass
parent 1e2b3ef865
commit 61f5ddcb7a
15 changed files with 584 additions and 0 deletions
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1
test/dm/Makefile
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@@ -24,6 +24,7 @@ obj-$(CONFIG_LED) += led.o
obj-$(CONFIG_DM_MAILBOX) += mailbox.o
obj-$(CONFIG_DM_MMC) += mmc.o
obj-$(CONFIG_DM_PCI) += pci.o
obj-$(CONFIG_POWER_DOMAIN) += power-domain.o
obj-$(CONFIG_RAM) += ram.o
obj-y += regmap.o
obj-$(CONFIG_REMOTEPROC) += remoteproc.o

46
test/dm/power-domain.c Normal file
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@@ -0,0 +1,46 @@
/*
* Copyright (c) 2016, NVIDIA CORPORATION.
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <dm.h>
#include <dm/test.h>
#include <asm/power-domain.h>
#include <test/ut.h>
/* This must match the specifier for power-domains in the DT node */
#define TEST_POWER_DOMAIN 2
static int dm_test_power_domain(struct unit_test_state *uts)
{
struct udevice *dev_power_domain;
struct udevice *dev_test;
ut_assertok(uclass_get_device_by_name(UCLASS_POWER_DOMAIN,
"power-domain",
&dev_power_domain));
ut_asserteq(0, sandbox_power_domain_query(dev_power_domain, 0));
ut_asserteq(0, sandbox_power_domain_query(dev_power_domain,
TEST_POWER_DOMAIN));
ut_assertok(uclass_get_device_by_name(UCLASS_MISC, "power-domain-test",
&dev_test));
ut_assertok(sandbox_power_domain_test_get(dev_test));
ut_assertok(sandbox_power_domain_test_on(dev_test));
ut_asserteq(0, sandbox_power_domain_query(dev_power_domain, 0));
ut_asserteq(1, sandbox_power_domain_query(dev_power_domain,
TEST_POWER_DOMAIN));
ut_assertok(sandbox_power_domain_test_off(dev_test));
ut_asserteq(0, sandbox_power_domain_query(dev_power_domain, 0));
ut_asserteq(0, sandbox_power_domain_query(dev_power_domain,
TEST_POWER_DOMAIN));
ut_assertok(sandbox_power_domain_test_free(dev_test));
return 0;
}
DM_TEST(dm_test_power_domain, DM_TESTF_SCAN_FDT);