mirror of
https://github.com/AsahiLinux/u-boot
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66391263f8
The clock and reset drivers use the exact same platform data. Simplify them by sharing the object. This is safe because the parent device (the clock device) always gets its driver model callbacks run first. Signed-off-by: Samuel Holland <samuel@sholland.org> Acked-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
81 lines
1.8 KiB
C
81 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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