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u-boot/drivers/misc/tegra_car.c

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misc: implement Tegra CAR core driver The Tegra CAR (Clock And Reset) module provides control of most clocks and reset signals within the Tegra SoC. This change implements a driver for this module. However, since the module implements multiple kinds of services (clocks, resets, perhaps more), all this driver does is bind various sub-devices, which in turn provide the real services. This driver is essentially an "MFD" (Multi-Function Device) in Linux kernel speak. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-09-13 16:45:57 +00:00
/*
* Copyright (c) 2016, NVIDIA CORPORATION.
*
* SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
#include <dm.h>
#include <dm/lists.h>
#include <dm/root.h>
/**
* The CAR exposes multiple different services. We create a sub-device for
* each separate type of service, since each device must be of the appropriate
* UCLASS.
*/
static int tegra_car_bpmp_bind(struct udevice *dev)
{
int ret;
struct udevice *child;
debug("%s(dev=%p)\n", __func__, dev);
ret = device_bind_driver_to_node(dev, "tegra_car_clk", "tegra_car_clk",
dm: core: Replace of_offset with accessor At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-01-17 23:52:55 +00:00
dev_of_offset(dev), &child);
misc: implement Tegra CAR core driver The Tegra CAR (Clock And Reset) module provides control of most clocks and reset signals within the Tegra SoC. This change implements a driver for this module. However, since the module implements multiple kinds of services (clocks, resets, perhaps more), all this driver does is bind various sub-devices, which in turn provide the real services. This driver is essentially an "MFD" (Multi-Function Device) in Linux kernel speak. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-09-13 16:45:57 +00:00
if (ret)
return ret;
ret = device_bind_driver_to_node(dev, "tegra_car_reset",
dm: core: Replace of_offset with accessor At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
2017-01-17 23:52:55 +00:00
"tegra_car_reset", dev_of_offset(dev),
misc: implement Tegra CAR core driver The Tegra CAR (Clock And Reset) module provides control of most clocks and reset signals within the Tegra SoC. This change implements a driver for this module. However, since the module implements multiple kinds of services (clocks, resets, perhaps more), all this driver does is bind various sub-devices, which in turn provide the real services. This driver is essentially an "MFD" (Multi-Function Device) in Linux kernel speak. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-09-13 16:45:57 +00:00
&child);
if (ret)
return ret;
return 0;
}
static int tegra_car_bpmp_probe(struct udevice *dev)
{
debug("%s(dev=%p)\n", __func__, dev);
return 0;
}
static int tegra_car_bpmp_remove(struct udevice *dev)
{
debug("%s(dev=%p)\n", __func__, dev);
return 0;
}
static const struct udevice_id tegra_car_bpmp_ids[] = {
{ .compatible = "nvidia,tegra20-car" },
{ .compatible = "nvidia,tegra30-car" },
{ .compatible = "nvidia,tegra114-car" },
{ .compatible = "nvidia,tegra124-car" },
{ .compatible = "nvidia,tegra210-car" },
{ }
};
U_BOOT_DRIVER(tegra_car_bpmp) = {
.name = "tegra_car",
.id = UCLASS_MISC,
.of_match = tegra_car_bpmp_ids,
.bind = tegra_car_bpmp_bind,
.probe = tegra_car_bpmp_probe,
.remove = tegra_car_bpmp_remove,
};
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