mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
e160f7d430
At present devices use a simple integer offset to record the device tree node associated with the device. In preparation for supporting a live device tree, which uses a node pointer instead, refactor existing code to access this field through an inline function. Signed-off-by: Simon Glass <sjg@chromium.org>
133 lines
3.2 KiB
C
133 lines
3.2 KiB
C
/*
|
|
* Qualcomm GPIO driver
|
|
*
|
|
* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <asm/gpio.h>
|
|
#include <asm/io.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/* Register offsets */
|
|
#define GPIO_CONFIG_OFF(no) ((no) * 0x1000)
|
|
#define GPIO_IN_OUT_OFF(no) ((no) * 0x1000 + 0x4)
|
|
|
|
/* OE */
|
|
#define GPIO_OE_DISABLE (0x0 << 9)
|
|
#define GPIO_OE_ENABLE (0x1 << 9)
|
|
#define GPIO_OE_MASK (0x1 << 9)
|
|
|
|
/* GPIO_IN_OUT register shifts. */
|
|
#define GPIO_IN 0
|
|
#define GPIO_OUT 1
|
|
|
|
struct msm_gpio_bank {
|
|
phys_addr_t base;
|
|
};
|
|
|
|
static int msm_gpio_direction_input(struct udevice *dev, unsigned int gpio)
|
|
{
|
|
struct msm_gpio_bank *priv = dev_get_priv(dev);
|
|
phys_addr_t reg = priv->base + GPIO_CONFIG_OFF(gpio);
|
|
|
|
/* Disable OE bit */
|
|
clrsetbits_le32(reg, GPIO_OE_MASK, GPIO_OE_DISABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int msm_gpio_set_value(struct udevice *dev, unsigned gpio, int value)
|
|
{
|
|
struct msm_gpio_bank *priv = dev_get_priv(dev);
|
|
|
|
value = !!value;
|
|
/* set value */
|
|
writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_OFF(gpio));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int msm_gpio_direction_output(struct udevice *dev, unsigned gpio,
|
|
int value)
|
|
{
|
|
struct msm_gpio_bank *priv = dev_get_priv(dev);
|
|
phys_addr_t reg = priv->base + GPIO_CONFIG_OFF(gpio);
|
|
|
|
value = !!value;
|
|
/* set value */
|
|
writel(value << GPIO_OUT, priv->base + GPIO_IN_OUT_OFF(gpio));
|
|
/* switch direction */
|
|
clrsetbits_le32(reg, GPIO_OE_MASK, GPIO_OE_ENABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int msm_gpio_get_value(struct udevice *dev, unsigned gpio)
|
|
{
|
|
struct msm_gpio_bank *priv = dev_get_priv(dev);
|
|
|
|
return !!(readl(priv->base + GPIO_IN_OUT_OFF(gpio)) >> GPIO_IN);
|
|
}
|
|
|
|
static int msm_gpio_get_function(struct udevice *dev, unsigned offset)
|
|
{
|
|
struct msm_gpio_bank *priv = dev_get_priv(dev);
|
|
|
|
if (readl(priv->base + GPIO_CONFIG_OFF(offset)) & GPIO_OE_ENABLE)
|
|
return GPIOF_OUTPUT;
|
|
|
|
return GPIOF_INPUT;
|
|
}
|
|
|
|
static const struct dm_gpio_ops gpio_msm_ops = {
|
|
.direction_input = msm_gpio_direction_input,
|
|
.direction_output = msm_gpio_direction_output,
|
|
.get_value = msm_gpio_get_value,
|
|
.set_value = msm_gpio_set_value,
|
|
.get_function = msm_gpio_get_function,
|
|
};
|
|
|
|
static int msm_gpio_probe(struct udevice *dev)
|
|
{
|
|
struct msm_gpio_bank *priv = dev_get_priv(dev);
|
|
|
|
priv->base = dev_get_addr(dev);
|
|
|
|
return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0;
|
|
}
|
|
|
|
static int msm_gpio_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
|
|
uc_priv->gpio_count = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
|
|
"gpio-count", 0);
|
|
uc_priv->bank_name = fdt_getprop(gd->fdt_blob, dev_of_offset(dev),
|
|
"gpio-bank-name", NULL);
|
|
if (uc_priv->bank_name == NULL)
|
|
uc_priv->bank_name = "soc";
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id msm_gpio_ids[] = {
|
|
{ .compatible = "qcom,msm8916-pinctrl" },
|
|
{ .compatible = "qcom,apq8016-pinctrl" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(gpio_msm) = {
|
|
.name = "gpio_msm",
|
|
.id = UCLASS_GPIO,
|
|
.of_match = msm_gpio_ids,
|
|
.ofdata_to_platdata = msm_gpio_ofdata_to_platdata,
|
|
.probe = msm_gpio_probe,
|
|
.ops = &gpio_msm_ops,
|
|
.priv_auto_alloc_size = sizeof(struct msm_gpio_bank),
|
|
};
|