mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-12 06:06:15 +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>
127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
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*
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* Derived from linux/arch/mips/bcm63xx/gpio.c:
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* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
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* Copyright (C) 2008-2011 Florian Fainelli <florian@openwrt.org>
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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 <asm/gpio.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct bcm6345_gpio_priv {
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void __iomem *reg_dirout;
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void __iomem *reg_data;
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};
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static int bcm6345_gpio_get_value(struct udevice *dev, unsigned offset)
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{
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struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
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return !!(readl_be(priv->reg_data) & BIT(offset));
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}
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static int bcm6345_gpio_set_value(struct udevice *dev, unsigned offset,
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int value)
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{
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struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
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if (value)
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setbits_be32(priv->reg_data, BIT(offset));
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else
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clrbits_be32(priv->reg_data, BIT(offset));
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return 0;
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}
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static int bcm6345_gpio_set_direction(void __iomem *dirout, unsigned offset,
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bool input)
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{
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if (input)
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clrbits_be32(dirout, BIT(offset));
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else
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setbits_be32(dirout, BIT(offset));
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return 0;
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}
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static int bcm6345_gpio_direction_input(struct udevice *dev, unsigned offset)
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{
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struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
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return bcm6345_gpio_set_direction(priv->reg_dirout, offset, 1);
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}
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static int bcm6345_gpio_direction_output(struct udevice *dev, unsigned offset,
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int value)
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{
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struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
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bcm6345_gpio_set_value(dev, offset, value);
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return bcm6345_gpio_set_direction(priv->reg_dirout, offset, 0);
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}
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static int bcm6345_gpio_get_function(struct udevice *dev, unsigned offset)
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{
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struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
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if (readl_be(priv->reg_dirout) & BIT(offset))
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return GPIOF_OUTPUT;
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else
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return GPIOF_INPUT;
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}
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static const struct dm_gpio_ops bcm6345_gpio_ops = {
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.direction_input = bcm6345_gpio_direction_input,
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.direction_output = bcm6345_gpio_direction_output,
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.get_value = bcm6345_gpio_get_value,
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.set_value = bcm6345_gpio_set_value,
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.get_function = bcm6345_gpio_get_function,
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};
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static int bcm6345_gpio_probe(struct udevice *dev)
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{
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
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fdt_addr_t data_addr, dirout_addr;
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fdt_size_t data_size, dirout_size;
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dirout_addr = devfdt_get_addr_size_index(dev, 0, &dirout_size);
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if (dirout_addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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data_addr = devfdt_get_addr_size_index(dev, 1, &data_size);
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if (data_addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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priv->reg_data = ioremap(data_addr, data_size);
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priv->reg_dirout = ioremap(dirout_addr, dirout_size);
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uc_priv->gpio_count = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
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"ngpios", 32);
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uc_priv->bank_name = dev->name;
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return 0;
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}
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static const struct udevice_id bcm6345_gpio_ids[] = {
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{ .compatible = "brcm,bcm6345-gpio" },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(bcm6345_gpio) = {
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.name = "bcm6345-gpio",
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.id = UCLASS_GPIO,
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.of_match = bcm6345_gpio_ids,
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.ops = &bcm6345_gpio_ops,
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.priv_auto_alloc_size = sizeof(struct bcm6345_gpio_priv),
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.probe = bcm6345_gpio_probe,
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};
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