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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* (C) Copyright 2017 Rockchip Electronics Co., Ltd
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*/
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#include <common.h>
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#include <dm.h>
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#include <reset-uclass.h>
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#include <linux/io.h>
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#include <asm/arch/hardware.h>
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#include <dm/lists.h>
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/*
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* Each reg has 16 bits reset signal for devices
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* Note: Not including rk2818 and older SoCs
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*/
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#define ROCKCHIP_RESET_NUM_IN_REG 16
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struct rockchip_reset_priv {
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void __iomem *base;
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/* Rockchip reset reg locate at cru controller */
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u32 reset_reg_offset;
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/* Rockchip reset reg number */
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u32 reset_reg_num;
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};
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static int rockchip_reset_request(struct reset_ctl *reset_ctl)
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{
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struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_num=%d)\n", __func__,
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reset_ctl, reset_ctl->dev, reset_ctl->id, priv->reset_reg_num);
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if (reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG >= priv->reset_reg_num)
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return -EINVAL;
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return 0;
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}
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static int rockchip_reset_free(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 rockchip_reset_assert(struct reset_ctl *reset_ctl)
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{
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struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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int bank = reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG;
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int offset = reset_ctl->id % ROCKCHIP_RESET_NUM_IN_REG;
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debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__,
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reset_ctl, reset_ctl->dev, reset_ctl->id,
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priv->base + (bank * 4));
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rk_setreg(priv->base + (bank * 4), BIT(offset));
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return 0;
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}
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static int rockchip_reset_deassert(struct reset_ctl *reset_ctl)
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{
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struct rockchip_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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int bank = reset_ctl->id / ROCKCHIP_RESET_NUM_IN_REG;
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int offset = reset_ctl->id % ROCKCHIP_RESET_NUM_IN_REG;
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debug("%s(reset_ctl=%p) (dev=%p, id=%lu) (reg_addr=%p)\n", __func__,
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reset_ctl, reset_ctl->dev, reset_ctl->id,
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priv->base + (bank * 4));
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rk_clrreg(priv->base + (bank * 4), BIT(offset));
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return 0;
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}
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struct reset_ops rockchip_reset_ops = {
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.request = rockchip_reset_request,
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.free = rockchip_reset_free,
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.rst_assert = rockchip_reset_assert,
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.rst_deassert = rockchip_reset_deassert,
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};
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static int rockchip_reset_probe(struct udevice *dev)
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{
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struct rockchip_reset_priv *priv = dev_get_priv(dev);
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fdt_addr_t addr;
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fdt_size_t size;
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addr = dev_read_addr_size(dev, "reg", &size);
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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if ((priv->reset_reg_offset == 0) && (priv->reset_reg_num == 0))
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return -EINVAL;
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addr += priv->reset_reg_offset;
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priv->base = ioremap(addr, size);
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debug("%s(base=%p) (reg_offset=%x, reg_num=%d)\n", __func__,
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priv->base, priv->reset_reg_offset, priv->reset_reg_num);
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return 0;
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}
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int rockchip_reset_bind(struct udevice *pdev, u32 reg_offset, u32 reg_number)
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{
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struct udevice *rst_dev;
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struct rockchip_reset_priv *priv;
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int ret;
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ret = device_bind_driver_to_node(pdev, "rockchip_reset", "reset",
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dev_ofnode(pdev), &rst_dev);
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if (ret) {
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debug("Warning: No rockchip reset driver: ret=%d\n", ret);
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return ret;
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}
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priv = malloc(sizeof(struct rockchip_reset_priv));
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priv->reset_reg_offset = reg_offset;
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priv->reset_reg_num = reg_number;
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rst_dev->priv = priv;
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return 0;
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}
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U_BOOT_DRIVER(rockchip_reset) = {
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.name = "rockchip_reset",
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.id = UCLASS_RESET,
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.probe = rockchip_reset_probe,
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.ops = &rockchip_reset_ops,
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.priv_auto_alloc_size = sizeof(struct rockchip_reset_priv),
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};
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