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167eb89a21
This patch adds support for resetting a board via the RAA215300 PMIC.
Note that the RAA215300 documentation names the available reset types
differently to u-boot:
* A "warm" reset via the RAA215300 PMIC will fully reset the SoC
(CPU & GPIOs), so this corresponds to SYSRESET_COLD.
* A "cold" reset via the RAA215300 PMIC will cycle all power supply
rails, so this corresponds to SYSRESET_POWER.
Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2023 Renesas Electronics Corporation
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*/
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#include <dm.h>
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#include <power/pmic.h>
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#include <sysreset.h>
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#define RAA215300_REG_SWRESET 0x6D
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#define RAA215300_COLD_RESET BIT(0)
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#define RAA215300_WARM_RESET BIT(1)
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static int raa215300_sysreset_request(struct udevice *dev, enum sysreset_t type)
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{
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struct udevice *pmic = dev_get_parent(dev);
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int ret;
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u8 val;
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/*
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* The RAA215300 documentation names the available reset types
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* differently to u-boot:
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*
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* - A "warm" reset via the RAA215300 PMIC will fully reset the SoC
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* (CPU & GPIOs), so this corresponds to SYSRESET_COLD.
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*
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* - A "cold" reset via the RAA215300 PMIC will cycle all power supply
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* rails, so this corresponds to SYSRESET_POWER.
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*/
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switch (type) {
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case SYSRESET_COLD:
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val = RAA215300_WARM_RESET;
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break;
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case SYSRESET_POWER:
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val = RAA215300_COLD_RESET;
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break;
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default:
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return -EPROTONOSUPPORT;
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}
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ret = pmic_reg_write(pmic, RAA215300_REG_SWRESET, val);
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if (ret)
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return ret;
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return -EINPROGRESS;
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}
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static struct sysreset_ops raa215300_sysreset_ops = {
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.request = raa215300_sysreset_request,
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};
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U_BOOT_DRIVER(raa215300_sysreset) = {
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.name = "raa215300_sysreset",
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.id = UCLASS_SYSRESET,
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.ops = &raa215300_sysreset_ops,
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};
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