[mirror_ubuntu-hirsute-kernel.git] / drivers / cpufreq / s3c24xx-cpufreq-debugfs.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2009 Simtec Electronics
 *	http://armlinux.simtec.co.uk/
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * S3C24XX CPU Frequency scaling - debugfs status support
*/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/err.h>

#include <linux/soc/samsung/s3c-cpufreq-core.h>

static struct dentry *dbgfs_root;
static struct dentry *dbgfs_file_io;
static struct dentry *dbgfs_file_info;
static struct dentry *dbgfs_file_board;

#define print_ns(x) ((x) / 10), ((x) % 10)

static void show_max(struct seq_file *seq, struct s3c_freq *f)
{
	seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
		   f->fclk, f->hclk, f->pclk, f->armclk);
}

static int board_show(struct seq_file *seq, void *p)
{
	struct s3c_cpufreq_config *cfg;
	struct s3c_cpufreq_board *brd;

	cfg = s3c_cpufreq_getconfig();
	if (!cfg) {
		seq_printf(seq, "no configuration registered\n");
		return 0;
	}

	brd = cfg->board;
	if (!brd) {
		seq_printf(seq, "no board definition set?\n");
		return 0;
	}

	seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
	seq_printf(seq, "auto_io=%u\n", brd->auto_io);
	seq_printf(seq, "need_io=%u\n", brd->need_io);

	show_max(seq, &brd->max);


	return 0;
}

DEFINE_SHOW_ATTRIBUTE(board);

static int info_show(struct seq_file *seq, void *p)
{
	struct s3c_cpufreq_config *cfg;

	cfg = s3c_cpufreq_getconfig();
	if (!cfg) {
		seq_printf(seq, "no configuration registered\n");
		return 0;
	}

	seq_printf(seq, "  FCLK %ld Hz\n", cfg->freq.fclk);
	seq_printf(seq, "  HCLK %ld Hz (%lu.%lu ns)\n",
		   cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
	seq_printf(seq, "  PCLK %ld Hz\n", cfg->freq.hclk);
	seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
	seq_printf(seq, "\n");

	show_max(seq, &cfg->max);

	seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
		   cfg->divs.h_divisor, cfg->divs.p_divisor,
		   cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
	seq_printf(seq, "\n");

	seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);

	return 0;
}

DEFINE_SHOW_ATTRIBUTE(info);

static int io_show(struct seq_file *seq, void *p)
{
	void (*show_bank)(struct seq_file *, struct s3c_cpufreq_config *, union s3c_iobank *);
	struct s3c_cpufreq_config *cfg;
	struct s3c_iotimings *iot;
	union s3c_iobank *iob;
	int bank;

	cfg = s3c_cpufreq_getconfig();
	if (!cfg) {
		seq_printf(seq, "no configuration registered\n");
		return 0;
	}

	show_bank = cfg->info->debug_io_show;
	if (!show_bank) {
		seq_printf(seq, "no code to show bank timing\n");
		return 0;
	}

	iot = s3c_cpufreq_getiotimings();
	if (!iot) {
		seq_printf(seq, "no io timings registered\n");
		return 0;
	}

	seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));

	for (bank = 0; bank < MAX_BANKS; bank++) {
		iob = &iot->bank[bank];

		seq_printf(seq, "bank %d: ", bank);

		if (!iob->io_2410) {
			seq_printf(seq, "nothing set\n");
			continue;
		}

		show_bank(seq, cfg, iob);
	}

	return 0;
}

DEFINE_SHOW_ATTRIBUTE(io);

static int __init s3c_freq_debugfs_init(void)
{
	dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
	if (IS_ERR(dbgfs_root)) {
		pr_err("%s: error creating debugfs root\n", __func__);
		return PTR_ERR(dbgfs_root);
	}

	dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
					    NULL, &io_fops);

	dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
					      NULL, &info_fops);

	dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
					       NULL, &board_fops);

	return 0;
}

late_initcall(s3c_freq_debugfs_init);
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
09ec1d7e	2	/*
e6d197a6 BD	3	* Copyright (c) 2009 Simtec Electronics
	4	* http://armlinux.simtec.co.uk/
	5	* Ben Dooks <ben@simtec.co.uk>
	6	*
	7	* S3C24XX CPU Frequency scaling - debugfs status support
e6d197a6 BD	8	*/
e6d197a6 BD	9
1c5864e2 JP	10	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
1c5864e2 JP	11
e6d197a6	12	#include <linux/init.h>
a69e4c28	13	#include <linux/export.h>
e6d197a6 BD	14	#include <linux/interrupt.h>
	15	#include <linux/ioport.h>
	16	#include <linux/cpufreq.h>
	17	#include <linux/debugfs.h>
	18	#include <linux/seq_file.h>
	19	#include <linux/err.h>
	20
81b11a6a	21	#include <linux/soc/samsung/s3c-cpufreq-core.h>
e6d197a6 BD	22
	23	static struct dentry *dbgfs_root;
	24	static struct dentry *dbgfs_file_io;
	25	static struct dentry *dbgfs_file_info;
	26	static struct dentry *dbgfs_file_board;
	27
	28	#define print_ns(x) ((x) / 10), ((x) % 10)
	29
	30	static void show_max(struct seq_file seq, struct s3c_freq f)
	31	{
	32	seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
	33	f->fclk, f->hclk, f->pclk, f->armclk);
	34	}
	35
	36	static int board_show(struct seq_file seq, void p)
	37	{
	38	struct s3c_cpufreq_config *cfg;
	39	struct s3c_cpufreq_board *brd;
	40
	41	cfg = s3c_cpufreq_getconfig();
	42	if (!cfg) {
	43	seq_printf(seq, "no configuration registered\n");
	44	return 0;
	45	}
	46
	47	brd = cfg->board;
	48	if (!brd) {
	49	seq_printf(seq, "no board definition set?\n");
	50	return 0;
	51	}
	52
	53	seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
	54	seq_printf(seq, "auto_io=%u\n", brd->auto_io);
	55	seq_printf(seq, "need_io=%u\n", brd->need_io);
	56
	57	show_max(seq, &brd->max);
	58
	59
	60	return 0;
	61	}
	62
6e218d21	63	DEFINE_SHOW_ATTRIBUTE(board);
e6d197a6 BD	64
	65	static int info_show(struct seq_file seq, void p)
	66	{
	67	struct s3c_cpufreq_config *cfg;
	68
	69	cfg = s3c_cpufreq_getconfig();
	70	if (!cfg) {
	71	seq_printf(seq, "no configuration registered\n");
	72	return 0;
	73	}
	74
	75	seq_printf(seq, " FCLK %ld Hz\n", cfg->freq.fclk);
	76	seq_printf(seq, " HCLK %ld Hz (%lu.%lu ns)\n",
	77	cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
	78	seq_printf(seq, " PCLK %ld Hz\n", cfg->freq.hclk);
	79	seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
	80	seq_printf(seq, "\n");
	81
	82	show_max(seq, &cfg->max);
	83
	84	seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
	85	cfg->divs.h_divisor, cfg->divs.p_divisor,
	86	cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
	87	seq_printf(seq, "\n");
	88
	89	seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);
	90
	91	return 0;
	92	}
	93
6e218d21	94	DEFINE_SHOW_ATTRIBUTE(info);
e6d197a6 BD	95
	96	static int io_show(struct seq_file seq, void p)
	97	{
	98	void (show_bank)(struct seq_file , struct s3c_cpufreq_config , union s3c_iobank );
	99	struct s3c_cpufreq_config *cfg;
	100	struct s3c_iotimings *iot;
	101	union s3c_iobank *iob;
	102	int bank;
	103
	104	cfg = s3c_cpufreq_getconfig();
	105	if (!cfg) {
	106	seq_printf(seq, "no configuration registered\n");
	107	return 0;
	108	}
	109
	110	show_bank = cfg->info->debug_io_show;
	111	if (!show_bank) {
	112	seq_printf(seq, "no code to show bank timing\n");
	113	return 0;
	114	}
	115
	116	iot = s3c_cpufreq_getiotimings();
	117	if (!iot) {
	118	seq_printf(seq, "no io timings registered\n");
	119	return 0;
	120	}
	121
	122	seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));
	123
	124	for (bank = 0; bank < MAX_BANKS; bank++) {
	125	iob = &iot->bank[bank];
	126
	127	seq_printf(seq, "bank %d: ", bank);
	128
	129	if (!iob->io_2410) {
	130	seq_printf(seq, "nothing set\n");
	131	continue;
	132	}
	133
	134	show_bank(seq, cfg, iob);
	135	}
	136
	137	return 0;
	138	}
	139
6e218d21	140	DEFINE_SHOW_ATTRIBUTE(io);
e6d197a6 BD	141
	142	static int __init s3c_freq_debugfs_init(void)
	143	{
	144	dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
	145	if (IS_ERR(dbgfs_root)) {
b49c22a6	146	pr_err("%s: error creating debugfs root\n", __func__);
e6d197a6 BD	147	return PTR_ERR(dbgfs_root);
	148	}
	149
	150	dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
6e218d21	151	NULL, &io_fops);
e6d197a6 BD	152
e6d197a6 BD	153	dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
6e218d21	154	NULL, &info_fops);
e6d197a6 BD	155
e6d197a6 BD	156	dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
6e218d21	157	NULL, &board_fops);
e6d197a6 BD	158
	159	return 0;
	160	}
	161
	162	late_initcall(s3c_freq_debugfs_init);
	163