mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 17:10:11 +00:00
f487a88c64
Update SCMI reset controller driver to get its assigned SCMI channel during initialization. This change allows SCMI reset domain protocol to use a dedicated channel when defined in the DT. The reference is saved in SCMI reset controller driver private data. Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2019-2022 Linaro Limited
|
|
*/
|
|
|
|
#define LOG_CATEGORY UCLASS_RESET
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <reset-uclass.h>
|
|
#include <scmi_agent.h>
|
|
#include <scmi_protocols.h>
|
|
#include <asm/types.h>
|
|
|
|
/**
|
|
* struct scmi_reset_priv - Private data for SCMI reset controller
|
|
* @channel: Reference to the SCMI channel to use
|
|
*/
|
|
struct scmi_reset_priv {
|
|
struct scmi_channel *channel;
|
|
};
|
|
|
|
static int scmi_reset_set_level(struct reset_ctl *rst, bool assert_not_deassert)
|
|
{
|
|
struct scmi_reset_priv *priv = dev_get_priv(rst->dev);
|
|
struct scmi_rd_reset_in in = {
|
|
.domain_id = rst->id,
|
|
.flags = assert_not_deassert ? SCMI_RD_RESET_FLAG_ASSERT : 0,
|
|
.reset_state = 0,
|
|
};
|
|
struct scmi_rd_reset_out out;
|
|
struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_RESET_DOMAIN,
|
|
SCMI_RESET_DOMAIN_RESET,
|
|
in, out);
|
|
int ret;
|
|
|
|
ret = devm_scmi_process_msg(rst->dev, priv->channel, &msg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return scmi_to_linux_errno(out.status);
|
|
}
|
|
|
|
static int scmi_reset_assert(struct reset_ctl *rst)
|
|
{
|
|
return scmi_reset_set_level(rst, true);
|
|
}
|
|
|
|
static int scmi_reset_deassert(struct reset_ctl *rst)
|
|
{
|
|
return scmi_reset_set_level(rst, false);
|
|
}
|
|
|
|
static int scmi_reset_request(struct reset_ctl *rst)
|
|
{
|
|
struct scmi_reset_priv *priv = dev_get_priv(rst->dev);
|
|
struct scmi_rd_attr_in in = {
|
|
.domain_id = rst->id,
|
|
};
|
|
struct scmi_rd_attr_out out;
|
|
struct scmi_msg msg = SCMI_MSG_IN(SCMI_PROTOCOL_ID_RESET_DOMAIN,
|
|
SCMI_RESET_DOMAIN_ATTRIBUTES,
|
|
in, out);
|
|
int ret;
|
|
|
|
/*
|
|
* We don't really care about the attribute, just check
|
|
* the reset domain exists.
|
|
*/
|
|
ret = devm_scmi_process_msg(rst->dev, priv->channel, &msg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return scmi_to_linux_errno(out.status);
|
|
}
|
|
|
|
static const struct reset_ops scmi_reset_domain_ops = {
|
|
.request = scmi_reset_request,
|
|
.rst_assert = scmi_reset_assert,
|
|
.rst_deassert = scmi_reset_deassert,
|
|
};
|
|
|
|
static int scmi_reset_probe(struct udevice *dev)
|
|
{
|
|
struct scmi_reset_priv *priv = dev_get_priv(dev);
|
|
|
|
return devm_scmi_of_get_channel(dev, &priv->channel);
|
|
}
|
|
|
|
U_BOOT_DRIVER(scmi_reset_domain) = {
|
|
.name = "scmi_reset_domain",
|
|
.id = UCLASS_RESET,
|
|
.ops = &scmi_reset_domain_ops,
|
|
.probe = scmi_reset_probe,
|
|
.priv_auto = sizeof(struct scmi_reset_priv *),
|
|
};
|