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// SPDX-License-Identifier: GPL-2.0+
/*
* Qualcomm PSHOLD reset driver
*
* Copyright (c) 2024 Sartura Ltd.
*
* Author: Robert Marko <robert.marko@sartura.hr>
* Based on the Linux msm-poweroff driver.
*
*/
#include <dm.h>
#include <sysreset.h>
#include <asm/io.h>
#include <linux/delay.h>
struct qcom_pshold_priv {
phys_addr_t base;
};
static int qcom_pshold_request(struct udevice *dev, enum sysreset_t type)
{
struct qcom_pshold_priv *priv = dev_get_priv(dev);
writel(0, priv->base);
mdelay(10000);
return 0;
}
static struct sysreset_ops qcom_pshold_ops = {
.request = qcom_pshold_request,
};
static int qcom_pshold_probe(struct udevice *dev)
{
struct qcom_pshold_priv *priv = dev_get_priv(dev);
priv->base = dev_read_addr(dev);
return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0;
}
static const struct udevice_id qcom_pshold_ids[] = {
{ .compatible = "qcom,pshold", },
{ /* sentinel */ }
};
U_BOOT_DRIVER(qcom_pshold) = {
.name = "qcom_pshold",
.id = UCLASS_SYSRESET,
.of_match = qcom_pshold_ids,
.probe = qcom_pshold_probe,
.priv_auto = sizeof(struct qcom_pshold_priv),
.ops = &qcom_pshold_ops,
};
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