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86cc012207
Number of Qualcomm ARMv7 SoC-s did not use PSCI but rather used PSHOLD (Qualcomm Power Supply Hold Reset) bit to trigger reset or poweroff. Qualcomm IPQ40XX is one of them, so provide a simple sysreset driver based on the upstream Linux one, it is DT compatible as well. Signed-off-by: Robert Marko <robert.marko@sartura.hr> Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org> Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Qualcomm PSHOLD reset driver
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*
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* Copyright (c) 2024 Sartura Ltd.
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*
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* Author: Robert Marko <robert.marko@sartura.hr>
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* Based on the Linux msm-poweroff driver.
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*
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*/
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#include <dm.h>
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#include <sysreset.h>
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#include <asm/io.h>
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#include <linux/delay.h>
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struct qcom_pshold_priv {
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phys_addr_t base;
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};
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static int qcom_pshold_request(struct udevice *dev, enum sysreset_t type)
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{
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struct qcom_pshold_priv *priv = dev_get_priv(dev);
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writel(0, priv->base);
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mdelay(10000);
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return 0;
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}
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static struct sysreset_ops qcom_pshold_ops = {
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.request = qcom_pshold_request,
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};
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static int qcom_pshold_probe(struct udevice *dev)
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{
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struct qcom_pshold_priv *priv = dev_get_priv(dev);
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priv->base = dev_read_addr(dev);
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return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0;
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}
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static const struct udevice_id qcom_pshold_ids[] = {
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{ .compatible = "qcom,pshold", },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(qcom_pshold) = {
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.name = "qcom_pshold",
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.id = UCLASS_SYSRESET,
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.of_match = qcom_pshold_ids,
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.probe = qcom_pshold_probe,
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.priv_auto = sizeof(struct qcom_pshold_priv),
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.ops = &qcom_pshold_ops,
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};
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