+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2009 Samsung Electronics
* Minkyu Kang <mk7.kang@samsung.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#define RATE_MASK(gpio) (0x1 << (gpio + 16))
#define RATE_SET(gpio) (0x1 << (gpio + 16))
-#define GPIO_NAME_SIZE 20
-
/* Platform data for each bank */
struct exynos_gpio_platdata {
struct s5p_gpio_bank *bank;
/* Information about each bank at run-time */
struct exynos_bank_info {
- char label[GPIO_PER_BANK][GPIO_NAME_SIZE];
struct s5p_gpio_bank *bank;
};
/* Driver model interface */
#ifndef CONFIG_SPL_BUILD
-static int exynos_gpio_get_state(struct udevice *dev, unsigned int offset,
- char *buf, int bufsize)
-{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
- struct exynos_bank_info *state = dev_get_priv(dev);
- const char *label;
- bool is_output;
- int size;
- int cfg;
-
- label = state->label[offset];
- cfg = s5p_gpio_get_cfg_pin(state->bank, offset);
- is_output = cfg == S5P_GPIO_OUTPUT;
- size = snprintf(buf, bufsize, "%s%d: ",
- uc_priv->bank_name ? uc_priv->bank_name : "", offset);
- buf += size;
- bufsize -= size;
- if (is_output || cfg == S5P_GPIO_INPUT) {
- snprintf(buf, bufsize, "%s: %d [%c]%s%s",
- is_output ? "out" : " in",
- s5p_gpio_get_value(state->bank, offset),
- *label ? 'x' : ' ',
- *label ? " " : "",
- label);
- } else {
- snprintf(buf, bufsize, "sfpio");
- }
-
- return 0;
-}
-
-static int check_reserved(struct udevice *dev, unsigned offset,
- const char *func)
-{
- struct exynos_bank_info *state = dev_get_priv(dev);
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
-
- if (!*state->label[offset]) {
- printf("exynos_gpio: %s: error: gpio %s%d not reserved\n",
- func, uc_priv->bank_name, offset);
- return -EPERM;
- }
-
- return 0;
-}
-
/* set GPIO pin 'gpio' as an input */
static int exynos_gpio_direction_input(struct udevice *dev, unsigned offset)
{
struct exynos_bank_info *state = dev_get_priv(dev);
- int ret;
-
- ret = check_reserved(dev, offset, __func__);
- if (ret)
- return ret;
/* Configure GPIO direction as input. */
s5p_gpio_cfg_pin(state->bank, offset, S5P_GPIO_INPUT);
int value)
{
struct exynos_bank_info *state = dev_get_priv(dev);
- int ret;
-
- ret = check_reserved(dev, offset, __func__);
- if (ret)
- return ret;
/* Configure GPIO output value. */
s5p_gpio_set_value(state->bank, offset, value);
static int exynos_gpio_get_value(struct udevice *dev, unsigned offset)
{
struct exynos_bank_info *state = dev_get_priv(dev);
- int ret;
-
- ret = check_reserved(dev, offset, __func__);
- if (ret)
- return ret;
return s5p_gpio_get_value(state->bank, offset);
}
int value)
{
struct exynos_bank_info *state = dev_get_priv(dev);
- int ret;
-
- ret = check_reserved(dev, offset, __func__);
- if (ret)
- return ret;
s5p_gpio_set_value(state->bank, offset, value);
return 0;
}
-
-static int exynos_gpio_request(struct udevice *dev, unsigned offset,
- const char *label)
-{
- struct exynos_bank_info *state = dev_get_priv(dev);
-
- if (*state->label[offset])
- return -EBUSY;
-
- strncpy(state->label[offset], label, GPIO_NAME_SIZE);
- state->label[offset][GPIO_NAME_SIZE - 1] = '\0';
-
- return 0;
-}
-
-static int exynos_gpio_free(struct udevice *dev, unsigned offset)
-{
- struct exynos_bank_info *state = dev_get_priv(dev);
- int ret;
-
- ret = check_reserved(dev, offset, __func__);
- if (ret)
- return ret;
- state->label[offset][0] = '\0';
-
- return 0;
-}
#endif /* nCONFIG_SPL_BUILD */
/*
struct exynos_bank_info *state = dev_get_priv(dev);
int cfg;
- if (!*state->label[offset])
- return GPIOF_UNUSED;
cfg = s5p_gpio_get_cfg_pin(state->bank, offset);
if (cfg == S5P_GPIO_OUTPUT)
return GPIOF_OUTPUT;
}
static const struct dm_gpio_ops gpio_exynos_ops = {
- .request = exynos_gpio_request,
- .free = exynos_gpio_free,
.direction_input = exynos_gpio_direction_input,
.direction_output = exynos_gpio_direction_output,
.get_value = exynos_gpio_get_value,
.set_value = exynos_gpio_set_value,
.get_function = exynos_gpio_get_function,
- .get_state = exynos_gpio_get_state,
};
static int gpio_exynos_probe(struct udevice *dev)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct exynos_bank_info *priv = dev->priv;
struct exynos_gpio_platdata *plat = dev->platdata;
if (plat)
return 0;
- base = (struct s5p_gpio_bank *)fdtdec_get_addr(gd->fdt_blob,
- parent->of_offset, "reg");
- for (node = fdt_first_subnode(blob, parent->of_offset), bank = base;
+ base = (struct s5p_gpio_bank *)devfdt_get_addr(parent);
+ for (node = fdt_first_subnode(blob, dev_of_offset(parent)), bank = base;
node > 0;
node = fdt_next_subnode(blob, node), bank++) {
struct exynos_gpio_platdata *plat;
plat = calloc(1, sizeof(*plat));
if (!plat)
return -ENOMEM;
- reg = fdtdec_get_addr(blob, node, "reg");
- if (reg != FDT_ADDR_T_NONE)
- bank = (struct s5p_gpio_bank *)((ulong)base + reg);
- plat->bank = bank;
- plat->bank_name = fdt_get_name(blob, node, NULL);
- debug("dev at %p: %s\n", bank, plat->bank_name);
+ plat->bank_name = fdt_get_name(blob, node, NULL);
ret = device_bind(parent, parent->driver,
- plat->bank_name, plat, -1, &dev);
+ plat->bank_name, plat, -1, &dev);
if (ret)
return ret;
- dev->of_offset = parent->of_offset;
+
+ dev_set_of_offset(dev, node);
+
+ reg = devfdt_get_addr(dev);
+ if (reg != FDT_ADDR_T_NONE)
+ bank = (struct s5p_gpio_bank *)((ulong)base + reg);
+
+ plat->bank = bank;
+
+ debug("dev at %p: %s\n", bank, plat->bank_name);
}
return 0;