u-boot/drivers/gpio/mvebu_gpio.c
Masahiro Yamada 8613c8d897 treewide: convert (void *)devfdt_get_addr() to dev_read_addr_ptr()
Use the _ptr suffixed variant instead of casting. Also, convert it to
dev_read_addr_ptr(), which is safe to CONFIG_OF_LIVE.

One curious part is an error check like follows in
drivers/watchdog/omap_wdt.c:

    priv->regs = (struct wd_timer *)devfdt_get_addr(dev);
    if (!priv->regs)
            return -EINVAL;

devfdt_get_addr() returns FDT_ADDR_T_NONE (i.e. -1) on error.
So, this code does not catch any error in DT parsing.

dev_read_addr_ptr() returns NULL on error, so this error check
will work.

I generated this commit by the following command:

 $ find . -name .git -prune -o -name '*.[ch]' -type f -print | \
   xargs sed -i -e 's/([^*)]*\*)devfdt_get_addr(/dev_read_addr_ptr(/'

I manually fixed drivers/usb/host/ehci-mx6.c

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2020-07-25 14:46:57 -06:00

121 lines
2.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <dm.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <errno.h>
#include <linux/bitops.h>
#define MVEBU_GPIOS_PER_BANK 32
struct mvebu_gpio_regs {
u32 data_out;
u32 io_conf;
u32 blink_en;
u32 in_pol;
u32 data_in;
};
struct mvebu_gpio_priv {
struct mvebu_gpio_regs *regs;
char name[2];
};
static int mvebu_gpio_direction_input(struct udevice *dev, unsigned int gpio)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
setbits_le32(&regs->io_conf, BIT(gpio));
return 0;
}
static int mvebu_gpio_direction_output(struct udevice *dev, unsigned gpio,
int value)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
if (value)
setbits_le32(&regs->data_out, BIT(gpio));
else
clrbits_le32(&regs->data_out, BIT(gpio));
clrbits_le32(&regs->io_conf, BIT(gpio));
return 0;
}
static int mvebu_gpio_get_function(struct udevice *dev, unsigned gpio)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
u32 val;
val = readl(&regs->io_conf) & BIT(gpio);
if (val)
return GPIOF_INPUT;
else
return GPIOF_OUTPUT;
}
static int mvebu_gpio_set_value(struct udevice *dev, unsigned gpio,
int value)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
if (value)
setbits_le32(&regs->data_out, BIT(gpio));
else
clrbits_le32(&regs->data_out, BIT(gpio));
return 0;
}
static int mvebu_gpio_get_value(struct udevice *dev, unsigned gpio)
{
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
struct mvebu_gpio_regs *regs = priv->regs;
return !!(readl(&regs->data_in) & BIT(gpio));
}
static int mvebu_gpio_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct mvebu_gpio_priv *priv = dev_get_priv(dev);
priv->regs = dev_read_addr_ptr(dev);
uc_priv->gpio_count = MVEBU_GPIOS_PER_BANK;
priv->name[0] = 'A' + dev->req_seq;
uc_priv->bank_name = priv->name;
return 0;
}
static const struct dm_gpio_ops mvebu_gpio_ops = {
.direction_input = mvebu_gpio_direction_input,
.direction_output = mvebu_gpio_direction_output,
.get_function = mvebu_gpio_get_function,
.get_value = mvebu_gpio_get_value,
.set_value = mvebu_gpio_set_value,
};
static const struct udevice_id mvebu_gpio_ids[] = {
{ .compatible = "marvell,orion-gpio" },
{ }
};
U_BOOT_DRIVER(gpio_mvebu) = {
.name = "gpio_mvebu",
.id = UCLASS_GPIO,
.of_match = mvebu_gpio_ids,
.ops = &mvebu_gpio_ops,
.probe = mvebu_gpio_probe,
.priv_auto_alloc_size = sizeof(struct mvebu_gpio_priv),
};