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81b11a6a09
The cpufreq drivers are split between the machine directory and the drivers/cpufreq directory. In order to share header files after we convert s3c to multiplatform, those headers have to live in a different global location. Move them to linux/soc/samsung/ in lack of a better place. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/20200806182059.2431-35-krzk@kernel.org Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
164 lines
3.7 KiB
C
164 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2009 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C24XX CPU Frequency scaling - debugfs status support
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/cpufreq.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/err.h>
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#include <linux/soc/samsung/s3c-cpufreq-core.h>
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static struct dentry *dbgfs_root;
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static struct dentry *dbgfs_file_io;
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static struct dentry *dbgfs_file_info;
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static struct dentry *dbgfs_file_board;
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#define print_ns(x) ((x) / 10), ((x) % 10)
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static void show_max(struct seq_file *seq, struct s3c_freq *f)
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{
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seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
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f->fclk, f->hclk, f->pclk, f->armclk);
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}
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static int board_show(struct seq_file *seq, void *p)
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{
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struct s3c_cpufreq_config *cfg;
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struct s3c_cpufreq_board *brd;
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cfg = s3c_cpufreq_getconfig();
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if (!cfg) {
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seq_printf(seq, "no configuration registered\n");
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return 0;
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}
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brd = cfg->board;
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if (!brd) {
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seq_printf(seq, "no board definition set?\n");
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return 0;
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}
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seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
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seq_printf(seq, "auto_io=%u\n", brd->auto_io);
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seq_printf(seq, "need_io=%u\n", brd->need_io);
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show_max(seq, &brd->max);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(board);
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static int info_show(struct seq_file *seq, void *p)
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{
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struct s3c_cpufreq_config *cfg;
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cfg = s3c_cpufreq_getconfig();
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if (!cfg) {
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seq_printf(seq, "no configuration registered\n");
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return 0;
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}
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seq_printf(seq, " FCLK %ld Hz\n", cfg->freq.fclk);
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seq_printf(seq, " HCLK %ld Hz (%lu.%lu ns)\n",
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cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
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seq_printf(seq, " PCLK %ld Hz\n", cfg->freq.hclk);
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seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
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seq_printf(seq, "\n");
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show_max(seq, &cfg->max);
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seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
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cfg->divs.h_divisor, cfg->divs.p_divisor,
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cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
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seq_printf(seq, "\n");
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seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(info);
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static int io_show(struct seq_file *seq, void *p)
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{
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void (*show_bank)(struct seq_file *, struct s3c_cpufreq_config *, union s3c_iobank *);
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struct s3c_cpufreq_config *cfg;
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struct s3c_iotimings *iot;
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union s3c_iobank *iob;
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int bank;
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cfg = s3c_cpufreq_getconfig();
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if (!cfg) {
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seq_printf(seq, "no configuration registered\n");
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return 0;
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}
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show_bank = cfg->info->debug_io_show;
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if (!show_bank) {
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seq_printf(seq, "no code to show bank timing\n");
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return 0;
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}
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iot = s3c_cpufreq_getiotimings();
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if (!iot) {
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seq_printf(seq, "no io timings registered\n");
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return 0;
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}
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seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));
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for (bank = 0; bank < MAX_BANKS; bank++) {
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iob = &iot->bank[bank];
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seq_printf(seq, "bank %d: ", bank);
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if (!iob->io_2410) {
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seq_printf(seq, "nothing set\n");
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continue;
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}
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show_bank(seq, cfg, iob);
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}
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(io);
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static int __init s3c_freq_debugfs_init(void)
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{
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dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
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if (IS_ERR(dbgfs_root)) {
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pr_err("%s: error creating debugfs root\n", __func__);
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return PTR_ERR(dbgfs_root);
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}
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dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
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NULL, &io_fops);
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dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
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NULL, &info_fops);
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dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
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NULL, &board_fops);
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return 0;
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}
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late_initcall(s3c_freq_debugfs_init);
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