/**
* pinctrl_generic_set_state_subnode() - apply all settings in config node
*
* @dev: pin controller device
* @config: pseudo device pointing to config node
* @return: 0 on success, or negative error code on failure
*/
static int pinctrl_generic_set_state_subnode(struct udevice *dev,
struct udevice *config)
{
const void *fdt = gd->fdt_blob;
int node = config->of_offset;
const char *subnode_target_type = "pins";
bool is_group = false;
const char *name;
int strings_count, selector, i, ret;
strings_count = fdt_stringlist_count(fdt, node, subnode_target_type);
if (strings_count < 0) {
subnode_target_type = "groups";
is_group = true;
strings_count = fdt_stringlist_count(fdt, node,
subnode_target_type);
if (strings_count < 0) {
/* skip this node; may contain config child nodes */
return 0;
}
}
for (i = 0; i < strings_count; i++) {
name = fdt_stringlist_get(fdt, node, subnode_target_type, i,
NULL);
if (!name)
return -EINVAL;
if (is_group)
selector = pinctrl_group_name_to_selector(dev, name);
else
selector = pinctrl_pin_name_to_selector(dev, name);
if (selector < 0)
return selector;
ret = pinctrl_generic_set_state_one(dev, config,
is_group, selector);
if (ret)
return ret;
}
return 0;
}
/**
* exynos_pinctrl_set_state: configure a pin state.
* dev: the pinctrl device to be configured.
* config: the state to be configured.
*/
int exynos_pinctrl_set_state(struct udevice *dev, struct udevice *config)
{
const void *fdt = gd->fdt_blob;
int node = config->of_offset;
unsigned int count, idx, pin_num;
unsigned int pinfunc, pinpud, pindrv;
unsigned long reg, value;
const char *name;
/*
* refer to the following document for the pinctrl bindings
* linux/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt
*/
count = fdt_stringlist_count(fdt, node, "samsung,pins");
if (count <= 0)
return -EINVAL;
pinfunc = fdtdec_get_int(fdt, node, "samsung,pin-function", -1);
pinpud = fdtdec_get_int(fdt, node, "samsung,pin-pud", -1);
pindrv = fdtdec_get_int(fdt, node, "samsung,pin-drv", -1);
for (idx = 0; idx < count; idx++) {
name = fdt_stringlist_get(fdt, node, "samsung,pins", idx, NULL);
if (!name)
continue;
reg = pin_to_bank_base(dev, name, &pin_num);
if (pinfunc != -1) {
value = readl(reg + PIN_CON);
value &= ~(0xf << (pin_num << 2));
value |= (pinfunc << (pin_num << 2));
writel(value, reg + PIN_CON);
}
if (pinpud != -1) {
value = readl(reg + PIN_PUD);
value &= ~(0x3 << (pin_num << 1));
value |= (pinpud << (pin_num << 1));
writel(value, reg + PIN_PUD);
}
if (pindrv != -1) {
value = readl(reg + PIN_DRV);
value &= ~(0x3 << (pin_num << 1));
value |= (pindrv << (pin_num << 1));
writel(value, reg + PIN_DRV);
}
}
return 0;
}
static void check_string_count(const void *fdt, const char *path,
const char *property, int count)
{
int offset, err;
offset = fdt_path_offset(fdt, path);
if (offset < 0)
FAIL("Couldn't find path %s", path);
err = fdt_stringlist_count(fdt, offset, property);
if (err < 0)
FAIL("Couldn't count strings in property %s of node %s: %d\n",
property, path, err);
if (err != count)
FAIL("String count for property %s of node %s is %d instead of %d\n",
path, property, err, count);
}
static int
tegra_xusb_padctl_group_parse_dt(struct tegra_xusb_padctl *padctl,
struct tegra_xusb_padctl_group *group,
const void *fdt, int node)
{
unsigned int i;
int len;
group->name = fdt_get_name(fdt, node, &len);
len = fdt_stringlist_count(fdt, node, "nvidia,lanes");
if (len < 0) {
error("failed to parse \"nvidia,lanes\" property");
return -EINVAL;
}
group->num_pins = len;
for (i = 0; i < group->num_pins; i++) {
group->pins[i] = fdt_stringlist_get(fdt, node, "nvidia,lanes",
i, NULL);
if (!group->pins[i]) {
error("failed to read string from \"nvidia,lanes\" property");
return -EINVAL;
}
}
group->num_pins = len;
group->func = fdt_stringlist_get(fdt, node, "nvidia,function", 0, NULL);
if (!group->func) {
error("failed to parse \"nvidia,func\" property");
return -EINVAL;
}
group->iddq = fdtdec_get_int(fdt, node, "nvidia,iddq", -1);
return 0;
}
static void check_expected_failure(const void *fdt, const char *path,
const char *property)
{
int offset, err;
offset = fdt_path_offset(fdt, "/");
if (offset < 0)
FAIL("Couldn't find path %s", path);
err = fdt_stringlist_count(fdt, offset, "#address-cells");
if (err != -FDT_ERR_BADVALUE)
FAIL("unexpectedly succeeded in parsing #address-cells\n");
err = fdt_stringlist_search(fdt, offset, "#address-cells", "foo");
if (err != -FDT_ERR_BADVALUE)
FAIL("found string in #address-cells: %d\n", err);
/*
* Note that the #address-cells property contains a small 32-bit
* unsigned integer, hence some bytes will be zero, and searching for
* the empty string will succeed.
*
* The reason for this oddity is that the function will exit when the
* first occurrence of the string is found, but in order to determine
* that the property does not contain a valid string list it would
* need to process the whole value.
*/
err = fdt_stringlist_search(fdt, offset, "#address-cells", "");
if (err != 0)
FAIL("empty string not found in #address-cells: %d\n", err);
/*
* fdt_get_string() can successfully extract strings from non-string
* properties. This is because it doesn't necessarily parse the whole
* property value, which would be necessary for it to determine if a
* valid string or string list is present.
*/
}
