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ce830106bf
Set the ops structure as static const. The structure is not accessible from outside of this driver and is not going to be modified at runtime. Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
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 <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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static const 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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