mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 11:16:15 +09:00
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>
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
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* Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
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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 <reset-uclass.h>
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#include <asm/io.h>
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/* reset clear offset for STM32MP RCC */
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#define RCC_CL 0x4
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enum rcc_type {
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RCC_STM32 = 0,
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RCC_STM32MP,
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};
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struct stm32_reset_priv {
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fdt_addr_t base;
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};
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static int stm32_reset_request(struct reset_ctl *reset_ctl)
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{
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return 0;
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}
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static int stm32_reset_free(struct reset_ctl *reset_ctl)
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{
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return 0;
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}
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static int stm32_reset_assert(struct reset_ctl *reset_ctl)
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{
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struct stm32_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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int bank = (reset_ctl->id / BITS_PER_LONG) * 4;
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int offset = reset_ctl->id % BITS_PER_LONG;
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debug("%s: reset id = %ld bank = %d offset = %d)\n", __func__,
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reset_ctl->id, bank, offset);
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if (dev_get_driver_data(reset_ctl->dev) == RCC_STM32MP)
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/* reset assert is done in rcc set register */
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writel(BIT(offset), priv->base + bank);
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else
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setbits_le32(priv->base + bank, BIT(offset));
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return 0;
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}
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static int stm32_reset_deassert(struct reset_ctl *reset_ctl)
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{
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struct stm32_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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int bank = (reset_ctl->id / BITS_PER_LONG) * 4;
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int offset = reset_ctl->id % BITS_PER_LONG;
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debug("%s: reset id = %ld bank = %d offset = %d)\n", __func__,
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reset_ctl->id, bank, offset);
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if (dev_get_driver_data(reset_ctl->dev) == RCC_STM32MP)
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/* reset deassert is done in rcc clr register */
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writel(BIT(offset), priv->base + bank + RCC_CL);
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else
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clrbits_le32(priv->base + bank, BIT(offset));
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return 0;
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}
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static const struct reset_ops stm32_reset_ops = {
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.request = stm32_reset_request,
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.free = stm32_reset_free,
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.rst_assert = stm32_reset_assert,
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.rst_deassert = stm32_reset_deassert,
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};
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static int stm32_reset_probe(struct udevice *dev)
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{
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struct stm32_reset_priv *priv = dev_get_priv(dev);
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priv->base = dev_read_addr(dev);
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if (priv->base == FDT_ADDR_T_NONE) {
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/* for MFD, get address of parent */
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priv->base = dev_read_addr(dev->parent);
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if (priv->base == FDT_ADDR_T_NONE)
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return -EINVAL;
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}
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return 0;
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}
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static const struct udevice_id stm32_reset_ids[] = {
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{ .compatible = "st,stm32mp1-rcc-rst", .data = RCC_STM32MP },
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{ }
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};
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U_BOOT_DRIVER(stm32_rcc_reset) = {
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.name = "stm32_rcc_reset",
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.id = UCLASS_RESET,
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.of_match = stm32_reset_ids,
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.probe = stm32_reset_probe,
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.priv_auto_alloc_size = sizeof(struct stm32_reset_priv),
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.ops = &stm32_reset_ops,
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};
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