/* list of all possible config options supported */
static struct pin_config {
- char *prop_cfg;
- unsigned int cfg_type;
-} pcfgs[] = {
+ const char *property;
+ enum pincfg_type param;
+} cfg_params[] = {
{ "samsung,pin-pud", PINCFG_TYPE_PUD },
{ "samsung,pin-drv", PINCFG_TYPE_DRV },
{ "samsung,pin-con-pdn", PINCFG_TYPE_CON_PDN },
{ "samsung,pin-pud-pdn", PINCFG_TYPE_PUD_PDN },
+ { "samsung,pin-val", PINCFG_TYPE_DAT },
};
/* Global list of devices (struct samsung_pinctrl_drv_data) */
return container_of(gc, struct samsung_pin_bank, gpio_chip);
}
-/* check if the selector is a valid pin group selector */
static int samsung_get_group_count(struct pinctrl_dev *pctldev)
{
- struct samsung_pinctrl_drv_data *drvdata;
+ struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
- drvdata = pinctrl_dev_get_drvdata(pctldev);
- return drvdata->nr_groups;
+ return pmx->nr_groups;
}
-/* return the name of the group selected by the group selector */
static const char *samsung_get_group_name(struct pinctrl_dev *pctldev,
- unsigned selector)
+ unsigned group)
{
- struct samsung_pinctrl_drv_data *drvdata;
+ struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
- drvdata = pinctrl_dev_get_drvdata(pctldev);
- return drvdata->pin_groups[selector].name;
+ return pmx->pin_groups[group].name;
}
-/* return the pin numbers associated with the specified group */
static int samsung_get_group_pins(struct pinctrl_dev *pctldev,
- unsigned selector, const unsigned **pins, unsigned *num_pins)
+ unsigned group,
+ const unsigned **pins,
+ unsigned *num_pins)
{
- struct samsung_pinctrl_drv_data *drvdata;
+ struct samsung_pinctrl_drv_data *pmx = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = pmx->pin_groups[group].pins;
+ *num_pins = pmx->pin_groups[group].num_pins;
- drvdata = pinctrl_dev_get_drvdata(pctldev);
- *pins = drvdata->pin_groups[selector].pins;
- *num_pins = drvdata->pin_groups[selector].num_pins;
return 0;
}
-/* create pinctrl_map entries by parsing device tree nodes */
-static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
- struct device_node *np, struct pinctrl_map **maps,
- unsigned *nmaps)
+static int reserve_map(struct device *dev, struct pinctrl_map **map,
+ unsigned *reserved_maps, unsigned *num_maps,
+ unsigned reserve)
{
- struct device *dev = pctldev->dev;
- struct pinctrl_map *map;
- unsigned long *cfg = NULL;
- char *gname, *fname;
- int cfg_cnt = 0, map_cnt = 0, idx = 0;
-
- /* count the number of config options specfied in the node */
- for (idx = 0; idx < ARRAY_SIZE(pcfgs); idx++) {
- if (of_find_property(np, pcfgs[idx].prop_cfg, NULL))
- cfg_cnt++;
- }
+ unsigned old_num = *reserved_maps;
+ unsigned new_num = *num_maps + reserve;
+ struct pinctrl_map *new_map;
- /*
- * Find out the number of map entries to create. All the config options
- * can be accomadated into a single config map entry.
- */
- if (cfg_cnt)
- map_cnt = 1;
- if (of_find_property(np, "samsung,pin-function", NULL))
- map_cnt++;
- if (!map_cnt) {
- dev_err(dev, "node %s does not have either config or function "
- "configurations\n", np->name);
- return -EINVAL;
- }
+ if (old_num >= new_num)
+ return 0;
- /* Allocate memory for pin-map entries */
- map = kzalloc(sizeof(*map) * map_cnt, GFP_KERNEL);
- if (!map) {
- dev_err(dev, "could not alloc memory for pin-maps\n");
+ new_map = krealloc(*map, sizeof(*new_map) * new_num, GFP_KERNEL);
+ if (!new_map) {
+ dev_err(dev, "krealloc(map) failed\n");
return -ENOMEM;
}
- *nmaps = 0;
- /*
- * Allocate memory for pin group name. The pin group name is derived
- * from the node name from which these map entries are be created.
- */
- gname = kzalloc(strlen(np->name) + GSUFFIX_LEN, GFP_KERNEL);
- if (!gname) {
- dev_err(dev, "failed to alloc memory for group name\n");
- goto free_map;
+ memset(new_map + old_num, 0, (new_num - old_num) * sizeof(*new_map));
+
+ *map = new_map;
+ *reserved_maps = new_num;
+
+ return 0;
+}
+
+static int add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
+ unsigned *num_maps, const char *group,
+ const char *function)
+{
+ if (WARN_ON(*num_maps == *reserved_maps))
+ return -ENOSPC;
+
+ (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
+ (*map)[*num_maps].data.mux.group = group;
+ (*map)[*num_maps].data.mux.function = function;
+ (*num_maps)++;
+
+ return 0;
+}
+
+static int add_map_configs(struct device *dev, struct pinctrl_map **map,
+ unsigned *reserved_maps, unsigned *num_maps,
+ const char *group, unsigned long *configs,
+ unsigned num_configs)
+{
+ unsigned long *dup_configs;
+
+ if (WARN_ON(*num_maps == *reserved_maps))
+ return -ENOSPC;
+
+ dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
+ GFP_KERNEL);
+ if (!dup_configs) {
+ dev_err(dev, "kmemdup(configs) failed\n");
+ return -ENOMEM;
}
- sprintf(gname, "%s%s", np->name, GROUP_SUFFIX);
- /*
- * don't have config options? then skip over to creating function
- * map entries.
- */
- if (!cfg_cnt)
- goto skip_cfgs;
-
- /* Allocate memory for config entries */
- cfg = kzalloc(sizeof(*cfg) * cfg_cnt, GFP_KERNEL);
- if (!cfg) {
- dev_err(dev, "failed to alloc memory for configs\n");
- goto free_gname;
+ (*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+ (*map)[*num_maps].data.configs.group_or_pin = group;
+ (*map)[*num_maps].data.configs.configs = dup_configs;
+ (*map)[*num_maps].data.configs.num_configs = num_configs;
+ (*num_maps)++;
+
+ return 0;
+}
+
+static int add_config(struct device *dev, unsigned long **configs,
+ unsigned *num_configs, unsigned long config)
+{
+ unsigned old_num = *num_configs;
+ unsigned new_num = old_num + 1;
+ unsigned long *new_configs;
+
+ new_configs = krealloc(*configs, sizeof(*new_configs) * new_num,
+ GFP_KERNEL);
+ if (!new_configs) {
+ dev_err(dev, "krealloc(configs) failed\n");
+ return -ENOMEM;
}
- /* Prepare a list of config settings */
- for (idx = 0, cfg_cnt = 0; idx < ARRAY_SIZE(pcfgs); idx++) {
- u32 value;
- if (!of_property_read_u32(np, pcfgs[idx].prop_cfg, &value))
- cfg[cfg_cnt++] =
- PINCFG_PACK(pcfgs[idx].cfg_type, value);
+ new_configs[old_num] = config;
+
+ *configs = new_configs;
+ *num_configs = new_num;
+
+ return 0;
+}
+
+static void samsung_dt_free_map(struct pinctrl_dev *pctldev,
+ struct pinctrl_map *map,
+ unsigned num_maps)
+{
+ int i;
+
+ for (i = 0; i < num_maps; i++)
+ if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
+ kfree(map[i].data.configs.configs);
+
+ kfree(map);
+}
+
+static int samsung_dt_subnode_to_map(struct samsung_pinctrl_drv_data *drvdata,
+ struct device *dev,
+ struct device_node *np,
+ struct pinctrl_map **map,
+ unsigned *reserved_maps,
+ unsigned *num_maps)
+{
+ int ret, i;
+ u32 val;
+ unsigned long config;
+ unsigned long *configs = NULL;
+ unsigned num_configs = 0;
+ unsigned reserve;
+ struct property *prop;
+ const char *group;
+ bool has_func = false;
+
+ ret = of_property_read_u32(np, "samsung,pin-function", &val);
+ if (!ret)
+ has_func = true;
+
+ for (i = 0; i < ARRAY_SIZE(cfg_params); i++) {
+ ret = of_property_read_u32(np, cfg_params[i].property, &val);
+ if (!ret) {
+ config = PINCFG_PACK(cfg_params[i].param, val);
+ ret = add_config(dev, &configs, &num_configs, config);
+ if (ret < 0)
+ goto exit;
+ /* EINVAL=missing, which is fine since it's optional */
+ } else if (ret != -EINVAL) {
+ dev_err(dev, "could not parse property %s\n",
+ cfg_params[i].property);
+ }
}
- /* create the config map entry */
- map[*nmaps].data.configs.group_or_pin = gname;
- map[*nmaps].data.configs.configs = cfg;
- map[*nmaps].data.configs.num_configs = cfg_cnt;
- map[*nmaps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
- *nmaps += 1;
-
-skip_cfgs:
- /* create the function map entry */
- if (of_find_property(np, "samsung,pin-function", NULL)) {
- fname = kzalloc(strlen(np->name) + FSUFFIX_LEN, GFP_KERNEL);
- if (!fname) {
- dev_err(dev, "failed to alloc memory for func name\n");
- goto free_cfg;
+ reserve = 0;
+ if (has_func)
+ reserve++;
+ if (num_configs)
+ reserve++;
+ ret = of_property_count_strings(np, "samsung,pins");
+ if (ret < 0) {
+ dev_err(dev, "could not parse property samsung,pins\n");
+ goto exit;
+ }
+ reserve *= ret;
+
+ ret = reserve_map(dev, map, reserved_maps, num_maps, reserve);
+ if (ret < 0)
+ goto exit;
+
+ of_property_for_each_string(np, "samsung,pins", prop, group) {
+ if (has_func) {
+ ret = add_map_mux(map, reserved_maps,
+ num_maps, group, np->full_name);
+ if (ret < 0)
+ goto exit;
}
- sprintf(fname, "%s%s", np->name, FUNCTION_SUFFIX);
- map[*nmaps].data.mux.group = gname;
- map[*nmaps].data.mux.function = fname;
- map[*nmaps].type = PIN_MAP_TYPE_MUX_GROUP;
- *nmaps += 1;
+ if (num_configs) {
+ ret = add_map_configs(dev, map, reserved_maps,
+ num_maps, group, configs,
+ num_configs);
+ if (ret < 0)
+ goto exit;
+ }
}
- *maps = map;
- return 0;
+ ret = 0;
-free_cfg:
- kfree(cfg);
-free_gname:
- kfree(gname);
-free_map:
- kfree(map);
- return -ENOMEM;
+exit:
+ kfree(configs);
+ return ret;
}
-/* free the memory allocated to hold the pin-map table */
-static void samsung_dt_free_map(struct pinctrl_dev *pctldev,
- struct pinctrl_map *map, unsigned num_maps)
+static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np_config,
+ struct pinctrl_map **map,
+ unsigned *num_maps)
{
- int idx;
-
- for (idx = 0; idx < num_maps; idx++) {
- if (map[idx].type == PIN_MAP_TYPE_MUX_GROUP) {
- kfree(map[idx].data.mux.function);
- if (!idx)
- kfree(map[idx].data.mux.group);
- } else if (map->type == PIN_MAP_TYPE_CONFIGS_GROUP) {
- kfree(map[idx].data.configs.configs);
- if (!idx)
- kfree(map[idx].data.configs.group_or_pin);
+ struct samsung_pinctrl_drv_data *drvdata;
+ unsigned reserved_maps;
+ struct device_node *np;
+ int ret;
+
+ drvdata = pinctrl_dev_get_drvdata(pctldev);
+
+ reserved_maps = 0;
+ *map = NULL;
+ *num_maps = 0;
+
+ if (!of_get_child_count(np_config))
+ return samsung_dt_subnode_to_map(drvdata, pctldev->dev,
+ np_config, map,
+ &reserved_maps,
+ num_maps);
+
+ for_each_child_of_node(np_config, np) {
+ ret = samsung_dt_subnode_to_map(drvdata, pctldev->dev, np, map,
+ &reserved_maps, num_maps);
+ if (ret < 0) {
+ samsung_dt_free_map(pctldev, *map, *num_maps);
+ return ret;
}
- };
+ }
- kfree(map);
+ return 0;
}
/* list of pinctrl callbacks for the pinctrl core */
unsigned group, bool enable)
{
struct samsung_pinctrl_drv_data *drvdata;
- const unsigned int *pins;
- struct samsung_pin_bank *bank;
- void __iomem *reg;
- u32 mask, shift, data, pin_offset, cnt;
- unsigned long flags;
-
- drvdata = pinctrl_dev_get_drvdata(pctldev);
- pins = drvdata->pin_groups[group].pins;
-
- /*
- * for each pin in the pin group selected, program the correspoding pin
- * pin function number in the config register.
- */
- for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++) {
- struct samsung_pin_bank_type *type;
-
- pin_to_reg_bank(drvdata, pins[cnt] - drvdata->ctrl->base,
- ®, &pin_offset, &bank);
- type = bank->type;
- mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
- shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC];
- if (shift >= 32) {
- /* Some banks have two config registers */
- shift -= 32;
- reg += 4;
- }
-
- spin_lock_irqsave(&bank->slock, flags);
-
- data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]);
- data &= ~(mask << shift);
- if (enable)
- data |= drvdata->pin_groups[group].func << shift;
- writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]);
-
- spin_unlock_irqrestore(&bank->slock, flags);
- }
-}
-
-/* enable a specified pinmux by writing to registers */
-static int samsung_pinmux_enable(struct pinctrl_dev *pctldev, unsigned selector,
- unsigned group)
-{
- samsung_pinmux_setup(pctldev, selector, group, true);
- return 0;
-}
-
-/* disable a specified pinmux by writing to registers */
-static void samsung_pinmux_disable(struct pinctrl_dev *pctldev,
- unsigned selector, unsigned group)
-{
- samsung_pinmux_setup(pctldev, selector, group, false);
-}
-
-/*
- * The calls to gpio_direction_output() and gpio_direction_input()
- * leads to this function call (via the pinctrl_gpio_direction_{input|output}()
- * function called from the gpiolib interface).
- */
-static int samsung_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev,
- struct pinctrl_gpio_range *range, unsigned offset, bool input)
-{
struct samsung_pin_bank_type *type;
struct samsung_pin_bank *bank;
- struct samsung_pinctrl_drv_data *drvdata;
void __iomem *reg;
- u32 data, pin_offset, mask, shift;
+ u32 mask, shift, data, pin_offset;
unsigned long flags;
+ const struct samsung_pmx_func *func;
+ const struct samsung_pin_group *grp;
- bank = gc_to_pin_bank(range->gc);
- type = bank->type;
drvdata = pinctrl_dev_get_drvdata(pctldev);
+ func = &drvdata->pmx_functions[selector];
+ grp = &drvdata->pin_groups[group];
- pin_offset = offset - bank->pin_base;
- reg = drvdata->virt_base + bank->pctl_offset +
- type->reg_offset[PINCFG_TYPE_FUNC];
-
+ pin_to_reg_bank(drvdata, grp->pins[0] - drvdata->ctrl->base,
+ ®, &pin_offset, &bank);
+ type = bank->type;
mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC];
if (shift >= 32) {
spin_lock_irqsave(&bank->slock, flags);
- data = readl(reg);
+ data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]);
data &= ~(mask << shift);
- if (!input)
- data |= FUNC_OUTPUT << shift;
- writel(data, reg);
+ if (enable)
+ data |= func->val << shift;
+ writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]);
spin_unlock_irqrestore(&bank->slock, flags);
+}
+/* enable a specified pinmux by writing to registers */
+static int samsung_pinmux_enable(struct pinctrl_dev *pctldev, unsigned selector,
+ unsigned group)
+{
+ samsung_pinmux_setup(pctldev, selector, group, true);
return 0;
}
.get_function_name = samsung_pinmux_get_fname,
.get_function_groups = samsung_pinmux_get_groups,
.enable = samsung_pinmux_enable,
- .disable = samsung_pinmux_disable,
- .gpio_set_direction = samsung_pinmux_gpio_set_direction,
};
/* set or get the pin config settings for a specified pin */
}
/*
- * gpiolib gpio_direction_input callback function. The setting of the pin
- * mux function as 'gpio input' will be handled by the pinctrl susbsystem
- * interface.
+ * The calls to gpio_direction_output() and gpio_direction_input()
+ * leads to this function call.
*/
+static int samsung_gpio_set_direction(struct gpio_chip *gc,
+ unsigned offset, bool input)
+{
+ struct samsung_pin_bank_type *type;
+ struct samsung_pin_bank *bank;
+ struct samsung_pinctrl_drv_data *drvdata;
+ void __iomem *reg;
+ u32 data, mask, shift;
+ unsigned long flags;
+
+ bank = gc_to_pin_bank(gc);
+ type = bank->type;
+ drvdata = bank->drvdata;
+
+ reg = drvdata->virt_base + bank->pctl_offset +
+ type->reg_offset[PINCFG_TYPE_FUNC];
+
+ mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1;
+ shift = offset * type->fld_width[PINCFG_TYPE_FUNC];
+ if (shift >= 32) {
+ /* Some banks have two config registers */
+ shift -= 32;
+ reg += 4;
+ }
+
+ spin_lock_irqsave(&bank->slock, flags);
+
+ data = readl(reg);
+ data &= ~(mask << shift);
+ if (!input)
+ data |= FUNC_OUTPUT << shift;
+ writel(data, reg);
+
+ spin_unlock_irqrestore(&bank->slock, flags);
+
+ return 0;
+}
+
+/* gpiolib gpio_direction_input callback function. */
static int samsung_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
- return pinctrl_gpio_direction_input(gc->base + offset);
+ return samsung_gpio_set_direction(gc, offset, true);
}
-/*
- * gpiolib gpio_direction_output callback function. The setting of the pin
- * mux function as 'gpio output' will be handled by the pinctrl susbsystem
- * interface.
- */
+/* gpiolib gpio_direction_output callback function. */
static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
int value)
{
samsung_gpio_set(gc, offset, value);
- return pinctrl_gpio_direction_output(gc->base + offset);
+ return samsung_gpio_set_direction(gc, offset, false);
}
/*
return (virq) ? : -ENXIO;
}
-/*
- * Parse the pin names listed in the 'samsung,pins' property and convert it
- * into a list of gpio numbers are create a pin group from it.
- */
-static int samsung_pinctrl_parse_dt_pins(struct platform_device *pdev,
- struct device_node *cfg_np,
- struct pinctrl_desc *pctl,
- unsigned int **pin_list,
- unsigned int *npins)
+static struct samsung_pin_group *samsung_pinctrl_create_groups(
+ struct device *dev,
+ struct samsung_pinctrl_drv_data *drvdata,
+ unsigned int *cnt)
{
- struct device *dev = &pdev->dev;
- struct property *prop;
- struct pinctrl_pin_desc const *pdesc = pctl->pins;
- unsigned int idx = 0, cnt;
- const char *pin_name;
+ struct pinctrl_desc *ctrldesc = &drvdata->pctl;
+ struct samsung_pin_group *groups, *grp;
+ const struct pinctrl_pin_desc *pdesc;
+ int i;
- *npins = of_property_count_strings(cfg_np, "samsung,pins");
- if (IS_ERR_VALUE(*npins)) {
- dev_err(dev, "invalid pin list in %s node", cfg_np->name);
+ groups = devm_kzalloc(dev, ctrldesc->npins * sizeof(*groups),
+ GFP_KERNEL);
+ if (!groups)
+ return ERR_PTR(-EINVAL);
+ grp = groups;
+
+ pdesc = ctrldesc->pins;
+ for (i = 0; i < ctrldesc->npins; ++i, ++pdesc, ++grp) {
+ grp->name = pdesc->name;
+ grp->pins = &pdesc->number;
+ grp->num_pins = 1;
+ }
+
+ *cnt = ctrldesc->npins;
+ return groups;
+}
+
+static int samsung_pinctrl_create_function(struct device *dev,
+ struct samsung_pinctrl_drv_data *drvdata,
+ struct device_node *func_np,
+ struct samsung_pmx_func *func)
+{
+ int npins;
+ int ret;
+ int i;
+
+ if (of_property_read_u32(func_np, "samsung,pin-function", &func->val))
+ return 0;
+
+ npins = of_property_count_strings(func_np, "samsung,pins");
+ if (npins < 1) {
+ dev_err(dev, "invalid pin list in %s node", func_np->name);
return -EINVAL;
}
- *pin_list = devm_kzalloc(dev, *npins * sizeof(**pin_list), GFP_KERNEL);
- if (!*pin_list) {
- dev_err(dev, "failed to allocate memory for pin list\n");
+ func->name = func_np->full_name;
+
+ func->groups = devm_kzalloc(dev, npins * sizeof(char *), GFP_KERNEL);
+ if (!func->groups)
return -ENOMEM;
- }
- of_property_for_each_string(cfg_np, "samsung,pins", prop, pin_name) {
- for (cnt = 0; cnt < pctl->npins; cnt++) {
- if (pdesc[cnt].name) {
- if (!strcmp(pin_name, pdesc[cnt].name)) {
- (*pin_list)[idx++] = pdesc[cnt].number;
- break;
- }
- }
- }
- if (cnt == pctl->npins) {
- dev_err(dev, "pin %s not valid in %s node\n",
- pin_name, cfg_np->name);
- devm_kfree(dev, *pin_list);
- return -EINVAL;
+ for (i = 0; i < npins; ++i) {
+ const char *gname;
+
+ ret = of_property_read_string_index(func_np, "samsung,pins",
+ i, &gname);
+ if (ret) {
+ dev_err(dev,
+ "failed to read pin name %d from %s node\n",
+ i, func_np->name);
+ return ret;
}
+
+ func->groups[i] = gname;
}
- return 0;
+ func->num_groups = npins;
+ return 1;
}
-/*
- * Parse the information about all the available pin groups and pin functions
- * from device node of the pin-controller. A pin group is formed with all
- * the pins listed in the "samsung,pins" property.
- */
-static int samsung_pinctrl_parse_dt(struct platform_device *pdev,
- struct samsung_pinctrl_drv_data *drvdata)
+static struct samsung_pmx_func *samsung_pinctrl_create_functions(
+ struct device *dev,
+ struct samsung_pinctrl_drv_data *drvdata,
+ unsigned int *cnt)
{
- struct device *dev = &pdev->dev;
+ struct samsung_pmx_func *functions, *func;
struct device_node *dev_np = dev->of_node;
struct device_node *cfg_np;
- struct samsung_pin_group *groups, *grp;
- struct samsung_pmx_func *functions, *func;
- unsigned *pin_list;
- unsigned int npins, grp_cnt, func_idx = 0;
- char *gname, *fname;
+ unsigned int func_cnt = 0;
int ret;
- grp_cnt = of_get_child_count(dev_np);
- if (!grp_cnt)
- return -EINVAL;
+ /*
+ * Iterate over all the child nodes of the pin controller node
+ * and create pin groups and pin function lists.
+ */
+ for_each_child_of_node(dev_np, cfg_np) {
+ struct device_node *func_np;
- groups = devm_kzalloc(dev, grp_cnt * sizeof(*groups), GFP_KERNEL);
- if (!groups) {
- dev_err(dev, "failed allocate memory for ping group list\n");
- return -EINVAL;
+ if (!of_get_child_count(cfg_np)) {
+ if (!of_find_property(cfg_np,
+ "samsung,pin-function", NULL))
+ continue;
+ ++func_cnt;
+ continue;
+ }
+
+ for_each_child_of_node(cfg_np, func_np) {
+ if (!of_find_property(func_np,
+ "samsung,pin-function", NULL))
+ continue;
+ ++func_cnt;
+ }
}
- grp = groups;
- functions = devm_kzalloc(dev, grp_cnt * sizeof(*functions), GFP_KERNEL);
+ functions = devm_kzalloc(dev, func_cnt * sizeof(*functions),
+ GFP_KERNEL);
if (!functions) {
dev_err(dev, "failed to allocate memory for function list\n");
- return -EINVAL;
+ return ERR_PTR(-EINVAL);
}
func = functions;
* Iterate over all the child nodes of the pin controller node
* and create pin groups and pin function lists.
*/
+ func_cnt = 0;
for_each_child_of_node(dev_np, cfg_np) {
- u32 function;
- if (!of_find_property(cfg_np, "samsung,pins", NULL))
+ struct device_node *func_np;
+
+ if (!of_get_child_count(cfg_np)) {
+ ret = samsung_pinctrl_create_function(dev, drvdata,
+ cfg_np, func);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ if (ret > 0) {
+ ++func;
+ ++func_cnt;
+ }
continue;
+ }
- ret = samsung_pinctrl_parse_dt_pins(pdev, cfg_np,
- &drvdata->pctl, &pin_list, &npins);
- if (ret)
- return ret;
-
- /* derive pin group name from the node name */
- gname = devm_kzalloc(dev, strlen(cfg_np->name) + GSUFFIX_LEN,
- GFP_KERNEL);
- if (!gname) {
- dev_err(dev, "failed to alloc memory for group name\n");
- return -ENOMEM;
+ for_each_child_of_node(cfg_np, func_np) {
+ ret = samsung_pinctrl_create_function(dev, drvdata,
+ func_np, func);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ if (ret > 0) {
+ ++func;
+ ++func_cnt;
+ }
}
- sprintf(gname, "%s%s", cfg_np->name, GROUP_SUFFIX);
+ }
- grp->name = gname;
- grp->pins = pin_list;
- grp->num_pins = npins;
- of_property_read_u32(cfg_np, "samsung,pin-function", &function);
- grp->func = function;
- grp++;
+ *cnt = func_cnt;
+ return functions;
+}
- if (!of_find_property(cfg_np, "samsung,pin-function", NULL))
- continue;
+/*
+ * Parse the information about all the available pin groups and pin functions
+ * from device node of the pin-controller. A pin group is formed with all
+ * the pins listed in the "samsung,pins" property.
+ */
- /* derive function name from the node name */
- fname = devm_kzalloc(dev, strlen(cfg_np->name) + FSUFFIX_LEN,
- GFP_KERNEL);
- if (!fname) {
- dev_err(dev, "failed to alloc memory for func name\n");
- return -ENOMEM;
- }
- sprintf(fname, "%s%s", cfg_np->name, FUNCTION_SUFFIX);
-
- func->name = fname;
- func->groups = devm_kzalloc(dev, sizeof(char *), GFP_KERNEL);
- if (!func->groups) {
- dev_err(dev, "failed to alloc memory for group list "
- "in pin function");
- return -ENOMEM;
- }
- func->groups[0] = gname;
- func->num_groups = 1;
- func++;
- func_idx++;
+static int samsung_pinctrl_parse_dt(struct platform_device *pdev,
+ struct samsung_pinctrl_drv_data *drvdata)
+{
+ struct device *dev = &pdev->dev;
+ struct samsung_pin_group *groups;
+ struct samsung_pmx_func *functions;
+ unsigned int grp_cnt = 0, func_cnt = 0;
+
+ groups = samsung_pinctrl_create_groups(dev, drvdata, &grp_cnt);
+ if (IS_ERR(groups)) {
+ dev_err(dev, "failed to parse pin groups\n");
+ return PTR_ERR(groups);
+ }
+
+ functions = samsung_pinctrl_create_functions(dev, drvdata, &func_cnt);
+ if (IS_ERR(functions)) {
+ dev_err(dev, "failed to parse pin functions\n");
+ return PTR_ERR(groups);
}
drvdata->pin_groups = groups;
drvdata->nr_groups = grp_cnt;
drvdata->pmx_functions = functions;
- drvdata->nr_functions = func_idx;
+ drvdata->nr_functions = func_cnt;
return 0;
}
pin_bank = &drvdata->ctrl->pin_banks[bank];
pin_bank->grange.name = pin_bank->name;
pin_bank->grange.id = bank;
- pin_bank->grange.pin_base = pin_bank->pin_base;
+ pin_bank->grange.pin_base = drvdata->ctrl->base
+ + pin_bank->pin_base;
pin_bank->grange.base = pin_bank->gpio_chip.base;
pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
pin_bank->grange.gc = &pin_bank->gpio_chip;
return 0;
}
+static int samsung_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void samsung_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ pinctrl_free_gpio(chip->base + offset);
+}
+
static const struct gpio_chip samsung_gpiolib_chip = {
+ .request = samsung_gpio_request,
+ .free = samsung_gpio_free,
.set = samsung_gpio_set,
.get = samsung_gpio_get,
.direction_input = samsung_gpio_direction_input,
projects / cascardo / linux.git / blobdiff