mirror of
https://github.com/AsahiLinux/u-boot
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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>
167 lines
3.7 KiB
C
167 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2015 Marek Vasut <marex@denx.de>
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*
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* DesignWare APB GPIO driver
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*/
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#include <common.h>
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#include <malloc.h>
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#include <asm/arch/gpio.h>
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <dm.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <dm/root.h>
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#include <errno.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define GPIO_SWPORT_DR(p) (0x00 + (p) * 0xc)
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#define GPIO_SWPORT_DDR(p) (0x04 + (p) * 0xc)
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#define GPIO_INTEN 0x30
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#define GPIO_INTMASK 0x34
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#define GPIO_INTTYPE_LEVEL 0x38
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#define GPIO_INT_POLARITY 0x3c
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#define GPIO_INTSTATUS 0x40
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#define GPIO_PORTA_DEBOUNCE 0x48
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#define GPIO_PORTA_EOI 0x4c
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#define GPIO_EXT_PORT(p) (0x50 + (p) * 4)
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struct gpio_dwapb_platdata {
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const char *name;
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int bank;
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int pins;
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fdt_addr_t base;
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};
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static int dwapb_gpio_direction_input(struct udevice *dev, unsigned pin)
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{
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struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
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clrbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin);
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return 0;
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}
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static int dwapb_gpio_direction_output(struct udevice *dev, unsigned pin,
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int val)
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{
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struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
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setbits_le32(plat->base + GPIO_SWPORT_DDR(plat->bank), 1 << pin);
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if (val)
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setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);
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else
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clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);
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return 0;
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}
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static int dwapb_gpio_get_value(struct udevice *dev, unsigned pin)
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{
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struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
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return !!(readl(plat->base + GPIO_EXT_PORT(plat->bank)) & (1 << pin));
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}
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static int dwapb_gpio_set_value(struct udevice *dev, unsigned pin, int val)
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{
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struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
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if (val)
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setbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);
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else
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clrbits_le32(plat->base + GPIO_SWPORT_DR(plat->bank), 1 << pin);
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return 0;
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}
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static const struct dm_gpio_ops gpio_dwapb_ops = {
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.direction_input = dwapb_gpio_direction_input,
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.direction_output = dwapb_gpio_direction_output,
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.get_value = dwapb_gpio_get_value,
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.set_value = dwapb_gpio_set_value,
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};
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static int gpio_dwapb_probe(struct udevice *dev)
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{
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struct gpio_dev_priv *priv = dev_get_uclass_priv(dev);
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struct gpio_dwapb_platdata *plat = dev->platdata;
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if (!plat)
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return 0;
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priv->gpio_count = plat->pins;
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priv->bank_name = plat->name;
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return 0;
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}
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static int gpio_dwapb_bind(struct udevice *dev)
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{
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struct gpio_dwapb_platdata *plat = dev_get_platdata(dev);
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const void *blob = gd->fdt_blob;
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struct udevice *subdev;
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fdt_addr_t base;
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int ret, node, bank = 0;
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/* If this is a child device, there is nothing to do here */
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if (plat)
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return 0;
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base = fdtdec_get_addr(blob, dev_of_offset(dev), "reg");
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if (base == FDT_ADDR_T_NONE) {
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debug("Can't get the GPIO register base address\n");
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return -ENXIO;
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}
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for (node = fdt_first_subnode(blob, dev_of_offset(dev));
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node > 0;
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node = fdt_next_subnode(blob, node)) {
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if (!fdtdec_get_bool(blob, node, "gpio-controller"))
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continue;
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plat = NULL;
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plat = calloc(1, sizeof(*plat));
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if (!plat)
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return -ENOMEM;
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plat->base = base;
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plat->bank = bank;
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plat->pins = fdtdec_get_int(blob, node, "snps,nr-gpios", 0);
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plat->name = fdt_stringlist_get(blob, node, "bank-name", 0,
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NULL);
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if (ret)
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goto err;
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ret = device_bind(dev, dev->driver, plat->name,
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plat, -1, &subdev);
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if (ret)
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goto err;
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dev_set_of_offset(subdev, node);
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bank++;
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}
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return 0;
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err:
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free(plat);
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return ret;
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}
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static const struct udevice_id gpio_dwapb_ids[] = {
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{ .compatible = "snps,dw-apb-gpio" },
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{ }
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};
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U_BOOT_DRIVER(gpio_dwapb) = {
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.name = "gpio-dwapb",
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.id = UCLASS_GPIO,
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.of_match = gpio_dwapb_ids,
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.ops = &gpio_dwapb_ops,
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.bind = gpio_dwapb_bind,
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.probe = gpio_dwapb_probe,
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};
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