drivers/pinctrl/samsung/pinctrl-samsung.c

Source file repositories/reference/linux-study-clean/drivers/pinctrl/samsung/pinctrl-samsung.c

File Facts

System
Linux kernel
Corpus path
drivers/pinctrl/samsung/pinctrl-samsung.c
Extension
.c
Size
41316 bytes
Lines
1547
Domain
Driver Families
Bucket
drivers/pinctrl
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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);
		}
	}

	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;
		}

		if (num_configs) {
			ret = add_map_configs(dev, map, reserved_maps,
					      num_maps, group, configs,
					      num_configs);
			if (ret < 0)
				goto exit;
		}
	}

	ret = 0;

exit:
	kfree(configs);
	return ret;
}

static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev,
					struct device_node *np_config,
					struct pinctrl_map **map,
					unsigned *num_maps)
{
	struct samsung_pinctrl_drv_data *drvdata;
	unsigned reserved_maps;
	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_scoped(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;
		}
	}

	return 0;
}

#ifdef CONFIG_DEBUG_FS
/* Forward declaration which can be used by samsung_pin_dbg_show */
static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
					unsigned long *config);
static const char * const reg_names[] = {"CON", "DAT", "PUD", "DRV", "CON_PDN",

Annotation

Implementation Notes