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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Texas Instruments System Control Interface (TI SCI) power domain driver
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*
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* Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
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* Andreas Dannenberg <dannenberg@ti.com>
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*
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* Loosely based on Linux kernel ti_sci_pm_domains.c...
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <malloc.h>
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#include <power-domain-uclass.h>
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#include <dm/device_compat.h>
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#include <linux/err.h>
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#include <linux/soc/ti/ti_sci_protocol.h>
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#include <dt-bindings/soc/ti,sci_pm_domain.h>
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/**
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* struct ti_sci_power_domain_data - pm domain controller information structure
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* @sci: TI SCI handle used for communication with system controller
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*/
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struct ti_sci_power_domain_data {
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const struct ti_sci_handle *sci;
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};
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static int ti_sci_power_domain_probe(struct udevice *dev)
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{
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struct ti_sci_power_domain_data *data = dev_get_priv(dev);
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debug("%s(dev=%p)\n", __func__, dev);
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if (!data)
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return -ENOMEM;
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/* Store handle for communication with the system controller */
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data->sci = ti_sci_get_handle(dev);
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if (IS_ERR(data->sci))
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return PTR_ERR(data->sci);
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return 0;
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}
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static int ti_sci_power_domain_on(struct power_domain *pd)
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{
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struct ti_sci_power_domain_data *data = dev_get_priv(pd->dev);
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const struct ti_sci_handle *sci = data->sci;
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const struct ti_sci_dev_ops *dops = &sci->ops.dev_ops;
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u8 flags = (uintptr_t)pd->priv;
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int ret;
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debug("%s(pd=%p)\n", __func__, pd);
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if (flags & TI_SCI_PD_EXCLUSIVE)
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ret = dops->get_device_exclusive(sci, pd->id);
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else
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ret = dops->get_device(sci, pd->id);
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if (ret)
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dev_err(pd->dev, "%s: get_device(%lu) failed (%d)\n",
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__func__, pd->id, ret);
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return ret;
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}
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static int ti_sci_power_domain_off(struct power_domain *pd)
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{
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struct ti_sci_power_domain_data *data = dev_get_priv(pd->dev);
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const struct ti_sci_handle *sci = data->sci;
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const struct ti_sci_dev_ops *dops = &sci->ops.dev_ops;
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int ret;
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debug("%s(pd=%p)\n", __func__, pd);
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ret = dops->put_device(sci, pd->id);
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if (ret)
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dev_err(pd->dev, "%s: put_device(%lu) failed (%d)\n",
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__func__, pd->id, ret);
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return ret;
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}
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static int ti_sci_power_domain_of_xlate(struct power_domain *pd,
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struct ofnode_phandle_args *args)
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{
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u8 flags;
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debug("%s(power_domain=%p)\n", __func__, pd);
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if (args->args_count < 1) {
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debug("Invalid args_count: %d\n", args->args_count);
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return -EINVAL;
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}
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pd->id = args->args[0];
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/* By default request for device exclusive */
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flags = TI_SCI_PD_EXCLUSIVE;
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if (args->args_count == 2)
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flags = args->args[1] & TI_SCI_PD_EXCLUSIVE;
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pd->priv = (void *)(uintptr_t)flags;
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return 0;
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}
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static const struct udevice_id ti_sci_power_domain_of_match[] = {
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{ .compatible = "ti,sci-pm-domain" },
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{ /* sentinel */ }
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};
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static struct power_domain_ops ti_sci_power_domain_ops = {
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.on = ti_sci_power_domain_on,
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.off = ti_sci_power_domain_off,
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.of_xlate = ti_sci_power_domain_of_xlate,
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};
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U_BOOT_DRIVER(ti_sci_pm_domains) = {
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.name = "ti-sci-pm-domains",
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.id = UCLASS_POWER_DOMAIN,
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.of_match = ti_sci_power_domain_of_match,
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.probe = ti_sci_power_domain_probe,
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.priv_auto = sizeof(struct ti_sci_power_domain_data),
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.ops = &ti_sci_power_domain_ops,
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};
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