mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-12 06:06:15 +09:00
d024236e5a
We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
/*
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* Copyright 2017 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#include <common.h>
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#include <dm.h>
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#include <misc.h>
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#include <reset.h>
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#include <reset-uclass.h>
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#include <wdt.h>
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#include <asm/io.h>
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#include <asm/arch/scu_ast2500.h>
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#include <asm/arch/wdt.h>
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struct ast2500_reset_priv {
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/* WDT used to perform resets. */
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struct udevice *wdt;
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struct ast2500_scu *scu;
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};
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static int ast2500_ofdata_to_platdata(struct udevice *dev)
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{
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struct ast2500_reset_priv *priv = dev_get_priv(dev);
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int ret;
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ret = uclass_get_device_by_phandle(UCLASS_WDT, dev, "aspeed,wdt",
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&priv->wdt);
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if (ret) {
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debug("%s: can't find WDT for reset controller", __func__);
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return ret;
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}
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return 0;
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}
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static int ast2500_reset_assert(struct reset_ctl *reset_ctl)
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{
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struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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u32 reset_mode, reset_mask;
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bool reset_sdram;
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int ret;
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/*
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* To reset SDRAM, a specifal flag in SYSRESET register
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* needs to be enabled first
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*/
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reset_mode = ast_reset_mode_from_flags(reset_ctl->id);
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reset_mask = ast_reset_mask_from_flags(reset_ctl->id);
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reset_sdram = reset_mode == WDT_CTRL_RESET_SOC &&
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(reset_mask & WDT_RESET_SDRAM);
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if (reset_sdram) {
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ast_scu_unlock(priv->scu);
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setbits_le32(&priv->scu->sysreset_ctrl1,
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SCU_SYSRESET_SDRAM_WDT);
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ret = wdt_expire_now(priv->wdt, reset_ctl->id);
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clrbits_le32(&priv->scu->sysreset_ctrl1,
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SCU_SYSRESET_SDRAM_WDT);
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ast_scu_lock(priv->scu);
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} else {
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ret = wdt_expire_now(priv->wdt, reset_ctl->id);
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}
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return ret;
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}
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static int ast2500_reset_request(struct reset_ctl *reset_ctl)
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{
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debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
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reset_ctl->dev, reset_ctl->id);
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return 0;
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}
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static int ast2500_reset_probe(struct udevice *dev)
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{
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struct ast2500_reset_priv *priv = dev_get_priv(dev);
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priv->scu = ast_get_scu();
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return 0;
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}
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static const struct udevice_id ast2500_reset_ids[] = {
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{ .compatible = "aspeed,ast2500-reset" },
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{ }
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};
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struct reset_ops ast2500_reset_ops = {
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.rst_assert = ast2500_reset_assert,
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.request = ast2500_reset_request,
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};
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U_BOOT_DRIVER(ast2500_reset) = {
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.name = "ast2500_reset",
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.id = UCLASS_RESET,
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.of_match = ast2500_reset_ids,
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.probe = ast2500_reset_probe,
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.ops = &ast2500_reset_ops,
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.ofdata_to_platdata = ast2500_ofdata_to_platdata,
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.priv_auto_alloc_size = sizeof(struct ast2500_reset_priv),
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};
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