mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 05:04:26 +00:00
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>
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015
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* Bhuvanchandra DV, Toradex, Inc.
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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 <fdtdec.h>
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#include <asm/gpio.h>
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#include <asm/mach-imx/iomux-v3.h>
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#include <asm/io.h>
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#include <malloc.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct vybrid_gpios {
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unsigned int chip;
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struct vybrid_gpio_regs *reg;
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};
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static int vybrid_gpio_direction_input(struct udevice *dev, unsigned gpio)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
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imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_IN);
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return 0;
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}
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static int vybrid_gpio_direction_output(struct udevice *dev, unsigned gpio,
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int value)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
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gpio_set_value(gpio, value);
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imx_iomux_gpio_set_direction(gpio, VF610_GPIO_DIRECTION_OUT);
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return 0;
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}
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static int vybrid_gpio_get_value(struct udevice *dev, unsigned gpio)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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return ((readl(&gpios->reg->gpio_pdir) & (1 << gpio))) ? 1 : 0;
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}
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static int vybrid_gpio_set_value(struct udevice *dev, unsigned gpio,
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int value)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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if (value)
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writel((1 << gpio), &gpios->reg->gpio_psor);
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else
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writel((1 << gpio), &gpios->reg->gpio_pcor);
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return 0;
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}
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static int vybrid_gpio_get_function(struct udevice *dev, unsigned gpio)
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{
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const struct vybrid_gpios *gpios = dev_get_priv(dev);
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u32 g_state = 0;
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gpio = gpio + (gpios->chip * VYBRID_GPIO_COUNT);
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imx_iomux_gpio_get_function(gpio, &g_state);
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if (((g_state & (0x07 << PAD_MUX_MODE_SHIFT)) >> PAD_MUX_MODE_SHIFT) > 0)
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return GPIOF_FUNC;
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if (g_state & PAD_CTL_OBE_ENABLE)
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return GPIOF_OUTPUT;
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if (g_state & PAD_CTL_IBE_ENABLE)
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return GPIOF_INPUT;
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if (!(g_state & PAD_CTL_OBE_IBE_ENABLE))
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return GPIOF_UNUSED;
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return GPIOF_UNKNOWN;
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}
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static const struct dm_gpio_ops gpio_vybrid_ops = {
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.direction_input = vybrid_gpio_direction_input,
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.direction_output = vybrid_gpio_direction_output,
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.get_value = vybrid_gpio_get_value,
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.set_value = vybrid_gpio_set_value,
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.get_function = vybrid_gpio_get_function,
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};
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static int vybrid_gpio_probe(struct udevice *dev)
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{
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struct vybrid_gpios *gpios = dev_get_priv(dev);
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struct vybrid_gpio_platdata *plat = dev_get_platdata(dev);
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struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
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uc_priv->bank_name = plat->port_name;
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uc_priv->gpio_count = VYBRID_GPIO_COUNT;
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gpios->reg = (struct vybrid_gpio_regs *)plat->base;
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gpios->chip = plat->chip;
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return 0;
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}
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static int vybrid_gpio_odata_to_platdata(struct udevice *dev)
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{
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struct vybrid_gpio_platdata *plat = dev_get_platdata(dev);
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fdt_addr_t base_addr;
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base_addr = devfdt_get_addr(dev);
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if (base_addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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plat->base = base_addr;
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plat->chip = dev->req_seq;
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plat->port_name = fdt_get_name(gd->fdt_blob, dev_of_offset(dev), NULL);
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return 0;
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}
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static const struct udevice_id vybrid_gpio_ids[] = {
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{ .compatible = "fsl,vf610-gpio" },
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{ }
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};
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U_BOOT_DRIVER(gpio_vybrid) = {
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.name = "gpio_vybrid",
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.id = UCLASS_GPIO,
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.ops = &gpio_vybrid_ops,
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.of_match = vybrid_gpio_ids,
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.ofdata_to_platdata = vybrid_gpio_odata_to_platdata,
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.probe = vybrid_gpio_probe,
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.priv_auto_alloc_size = sizeof(struct vybrid_gpios),
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.platdata_auto_alloc_size = sizeof(struct vybrid_gpio_platdata),
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};
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