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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (C) 2018 Amarula Solutions.
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* Author: Jagan Teki <jagan@amarulasolutions.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <malloc.h>
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#include <reset-uclass.h>
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#include <asm/io.h>
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#include <clk/sunxi.h>
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#include <linux/bitops.h>
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#include <linux/log2.h>
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static const struct ccu_reset *plat_to_reset(struct ccu_plat *plat,
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unsigned long id)
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{
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return &plat->desc->resets[id];
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}
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static int sunxi_reset_request(struct reset_ctl *reset_ctl)
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{
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struct ccu_plat *plat = dev_get_plat(reset_ctl->dev);
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debug("%s: (RST#%ld)\n", __func__, reset_ctl->id);
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if (reset_ctl->id >= plat->desc->num_resets)
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return -EINVAL;
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return 0;
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}
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static int sunxi_set_reset(struct reset_ctl *reset_ctl, bool on)
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{
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struct ccu_plat *plat = dev_get_plat(reset_ctl->dev);
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const struct ccu_reset *reset = plat_to_reset(plat, reset_ctl->id);
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u32 reg;
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if (!(reset->flags & CCU_RST_F_IS_VALID)) {
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printf("%s: (RST#%ld) unhandled\n", __func__, reset_ctl->id);
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return 0;
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}
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debug("%s: (RST#%ld) off#0x%x, BIT(%d)\n", __func__,
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reset_ctl->id, reset->off, ilog2(reset->bit));
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reg = readl(plat->base + reset->off);
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if (on)
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reg |= reset->bit;
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else
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reg &= ~reset->bit;
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writel(reg, plat->base + reset->off);
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return 0;
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}
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static int sunxi_reset_assert(struct reset_ctl *reset_ctl)
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{
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return sunxi_set_reset(reset_ctl, false);
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}
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static int sunxi_reset_deassert(struct reset_ctl *reset_ctl)
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{
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return sunxi_set_reset(reset_ctl, true);
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}
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struct reset_ops sunxi_reset_ops = {
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.request = sunxi_reset_request,
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.rst_assert = sunxi_reset_assert,
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.rst_deassert = sunxi_reset_deassert,
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};
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U_BOOT_DRIVER(sunxi_reset) = {
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.name = "sunxi_reset",
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.id = UCLASS_RESET,
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.ops = &sunxi_reset_ops,
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};
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