/* SPDX-License-Identifier: GPL-2.0 */

#include <linux/debugfs.h>
#include <linux/avm_hw_config.h>

static ssize_t avm_hw_config_read(struct file *fp, char __user *ubuf,
		size_t count, loff_t *pos)
{
	struct _avm_hw_config *config =
		(struct _avm_hw_config *)fp->private_data;
	char const *avm_hw_param_to_string[] = {
		[avm_hw_param_gpio_out_active_low] = "out active-low",
		[avm_hw_param_gpio_out_active_high] = "out active-high",
		[avm_hw_param_gpio_in_active_low] = "in active-low",
		[avm_hw_param_gpio_in_active_high] = "in active-high",
		[avm_hw_param_out_pinmux1] = "out pinmux1",
		[avm_hw_param_in_pinmux1] = "in pinmux1"
	};
	char buf[count];
	ssize_t len;

	/* use 'param' attribute to get direction and active level of gpio */
	if (config->param < avm_hw_param_last_param)
		scnprintf(buf, count, "gpio-%d: %s\n", config->value,
			  avm_hw_param_to_string[config->param]);
	else
		scnprintf(buf, count, "gpio-%d\n", config->value);

	len = strlen(buf);

	return simple_read_from_buffer(ubuf, count, pos, buf, len);
}

static const struct file_operations avm_hw_config_debugfs_fops = {
	.open = simple_open,
	.read = avm_hw_config_read,
};

int init_debugfs(void)
{
	struct dentry *dir;
	struct _avm_hw_config *config_table;
	int i;

	dir = debugfs_create_dir("avm-hw-config", NULL);
	if (!dir)
		return -ENOMEM;

	config_table = avm_get_hw_config_table();
	if (!config_table) {
		pr_err("Couldn't get avm_hw_config_table!\n");
		return -ENODATA;
	}

	for (i = 0; config_table[i].name; i++) {
		debugfs_create_file(config_table[i].name, 0400, dir,
					&config_table[i],
					&avm_hw_config_debugfs_fops);
	}

	return 0;
}