mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 02:33:07 +00:00
d1998a9fde
This name is far too long. Rename it to remove the 'data' bits. This makes it consistent with the platdata->plat rename. Signed-off-by: Simon Glass <sjg@chromium.org>
159 lines
3.8 KiB
C
159 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2018 Alexander Graf <agraf@suse.de>
|
|
*
|
|
* Based on drivers/pinctrl/mvebu/pinctrl-mvebu.c and
|
|
* drivers/gpio/bcm2835_gpio.c
|
|
*
|
|
* This driver gets instantiated by the GPIO driver, because both devices
|
|
* share the same device node.
|
|
* https://spdx.org/licenses
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <config.h>
|
|
#include <errno.h>
|
|
#include <dm.h>
|
|
#include <log.h>
|
|
#include <dm/pinctrl.h>
|
|
#include <dm/root.h>
|
|
#include <dm/device-internal.h>
|
|
#include <dm/lists.h>
|
|
#include <asm/system.h>
|
|
#include <asm/io.h>
|
|
#include <asm/gpio.h>
|
|
|
|
struct bcm283x_pinctrl_priv {
|
|
u32 *base_reg;
|
|
};
|
|
|
|
#define MAX_PINS_PER_BANK 16
|
|
|
|
static void bcm2835_gpio_set_func_id(struct udevice *dev, unsigned int gpio,
|
|
int func)
|
|
{
|
|
struct bcm283x_pinctrl_priv *priv = dev_get_priv(dev);
|
|
int reg_offset;
|
|
int field_offset;
|
|
|
|
reg_offset = BCM2835_GPIO_FSEL_BANK(gpio);
|
|
field_offset = BCM2835_GPIO_FSEL_SHIFT(gpio);
|
|
|
|
clrsetbits_le32(&priv->base_reg[reg_offset],
|
|
BCM2835_GPIO_FSEL_MASK << field_offset,
|
|
(func & BCM2835_GPIO_FSEL_MASK) << field_offset);
|
|
}
|
|
|
|
static int bcm2835_gpio_get_func_id(struct udevice *dev, unsigned int gpio)
|
|
{
|
|
struct bcm283x_pinctrl_priv *priv = dev_get_priv(dev);
|
|
u32 val;
|
|
|
|
val = readl(&priv->base_reg[BCM2835_GPIO_FSEL_BANK(gpio)]);
|
|
|
|
return (val >> BCM2835_GPIO_FSEL_SHIFT(gpio) & BCM2835_GPIO_FSEL_MASK);
|
|
}
|
|
|
|
/*
|
|
* bcm283x_pinctrl_set_state: configure pin functions.
|
|
* @dev: the pinctrl device to be configured.
|
|
* @config: the state to be configured.
|
|
* @return: 0 in success
|
|
*/
|
|
int bcm283x_pinctrl_set_state(struct udevice *dev, struct udevice *config)
|
|
{
|
|
u32 pin_arr[MAX_PINS_PER_BANK];
|
|
int function;
|
|
int i, len, pin_count = 0;
|
|
|
|
if (!dev_read_prop(config, "brcm,pins", &len) || !len ||
|
|
len & 0x3 || dev_read_u32_array(config, "brcm,pins", pin_arr,
|
|
len / sizeof(u32))) {
|
|
debug("Failed reading pins array for pinconfig %s (%d)\n",
|
|
config->name, len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
pin_count = len / sizeof(u32);
|
|
|
|
function = dev_read_u32_default(config, "brcm,function", -1);
|
|
if (function < 0) {
|
|
debug("Failed reading function for pinconfig %s (%d)\n",
|
|
config->name, function);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < pin_count; i++)
|
|
bcm2835_gpio_set_func_id(dev, pin_arr[i], function);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm283x_pinctrl_get_gpio_mux(struct udevice *dev, int banknum,
|
|
int index)
|
|
{
|
|
if (banknum != 0)
|
|
return -EINVAL;
|
|
|
|
return bcm2835_gpio_get_func_id(dev, index);
|
|
}
|
|
|
|
static const struct udevice_id bcm2835_pinctrl_id[] = {
|
|
{.compatible = "brcm,bcm2835-gpio"},
|
|
{.compatible = "brcm,bcm2711-gpio"},
|
|
{}
|
|
};
|
|
|
|
int bcm283x_pinctl_of_to_plat(struct udevice *dev)
|
|
{
|
|
struct bcm283x_pinctrl_priv *priv;
|
|
|
|
priv = dev_get_priv(dev);
|
|
|
|
priv->base_reg = dev_read_addr_ptr(dev);
|
|
if (!priv->base_reg) {
|
|
debug("%s: Failed to get base address\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int bcm283x_pinctl_probe(struct udevice *dev)
|
|
{
|
|
int ret;
|
|
struct udevice *pdev;
|
|
|
|
/* Create GPIO device as well */
|
|
ret = device_bind(dev, lists_driver_lookup_name("gpio_bcm2835"),
|
|
"gpio_bcm2835", NULL, dev_ofnode(dev), &pdev);
|
|
if (ret) {
|
|
/*
|
|
* While we really want the pinctrl driver to work to make
|
|
* devices go where they should go, the GPIO controller is
|
|
* not quite as crucial as it's only rarely used, so don't
|
|
* fail here.
|
|
*/
|
|
printf("Failed to bind GPIO driver\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pinctrl_ops bcm283x_pinctrl_ops = {
|
|
.set_state = bcm283x_pinctrl_set_state,
|
|
.get_gpio_mux = bcm283x_pinctrl_get_gpio_mux,
|
|
};
|
|
|
|
U_BOOT_DRIVER(pinctrl_bcm283x) = {
|
|
.name = "bcm283x_pinctrl",
|
|
.id = UCLASS_PINCTRL,
|
|
.of_match = of_match_ptr(bcm2835_pinctrl_id),
|
|
.of_to_plat = bcm283x_pinctl_of_to_plat,
|
|
.priv_auto = sizeof(struct bcm283x_pinctrl_priv),
|
|
.ops = &bcm283x_pinctrl_ops,
|
|
.probe = bcm283x_pinctl_probe,
|
|
#if CONFIG_IS_ENABLED(OF_BOARD)
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
#endif
|
|
};
|