^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2009 Simtec Electronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * http://armlinux.simtec.co.uk/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Ben Dooks <ben@simtec.co.uk>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * S3C24XX CPU Frequency scaling - debugfs status support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/cpufreq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/soc/samsung/s3c-cpufreq-core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static struct dentry *dbgfs_root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static struct dentry *dbgfs_file_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static struct dentry *dbgfs_file_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static struct dentry *dbgfs_file_board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define print_ns(x) ((x) / 10), ((x) % 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static void show_max(struct seq_file *seq, struct s3c_freq *f)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) seq_printf(seq, "MAX: F=%lu, H=%lu, P=%lu, A=%lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) f->fclk, f->hclk, f->pclk, f->armclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int board_show(struct seq_file *seq, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct s3c_cpufreq_config *cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct s3c_cpufreq_board *brd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) cfg = s3c_cpufreq_getconfig();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (!cfg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) seq_printf(seq, "no configuration registered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) brd = cfg->board;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (!brd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) seq_printf(seq, "no board definition set?\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) seq_printf(seq, "SDRAM refresh %u ns\n", brd->refresh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) seq_printf(seq, "auto_io=%u\n", brd->auto_io);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) seq_printf(seq, "need_io=%u\n", brd->need_io);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) show_max(seq, &brd->max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) DEFINE_SHOW_ATTRIBUTE(board);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int info_show(struct seq_file *seq, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct s3c_cpufreq_config *cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) cfg = s3c_cpufreq_getconfig();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (!cfg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) seq_printf(seq, "no configuration registered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) seq_printf(seq, " FCLK %ld Hz\n", cfg->freq.fclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) seq_printf(seq, " HCLK %ld Hz (%lu.%lu ns)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) cfg->freq.hclk, print_ns(cfg->freq.hclk_tns));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) seq_printf(seq, " PCLK %ld Hz\n", cfg->freq.hclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) seq_printf(seq, "ARMCLK %ld Hz\n", cfg->freq.armclk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) seq_printf(seq, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) show_max(seq, &cfg->max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) seq_printf(seq, "Divisors: P=%d, H=%d, A=%d, dvs=%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) cfg->divs.h_divisor, cfg->divs.p_divisor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) cfg->divs.arm_divisor, cfg->divs.dvs ? "on" : "off");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) seq_printf(seq, "\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) seq_printf(seq, "lock_pll=%u\n", cfg->lock_pll);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) DEFINE_SHOW_ATTRIBUTE(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static int io_show(struct seq_file *seq, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) void (*show_bank)(struct seq_file *, struct s3c_cpufreq_config *, union s3c_iobank *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct s3c_cpufreq_config *cfg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct s3c_iotimings *iot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) union s3c_iobank *iob;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) int bank;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) cfg = s3c_cpufreq_getconfig();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (!cfg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) seq_printf(seq, "no configuration registered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) show_bank = cfg->info->debug_io_show;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (!show_bank) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) seq_printf(seq, "no code to show bank timing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) iot = s3c_cpufreq_getiotimings();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (!iot) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) seq_printf(seq, "no io timings registered\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) seq_printf(seq, "hclk period is %lu.%lu ns\n", print_ns(cfg->freq.hclk_tns));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) for (bank = 0; bank < MAX_BANKS; bank++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) iob = &iot->bank[bank];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) seq_printf(seq, "bank %d: ", bank);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!iob->io_2410) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) seq_printf(seq, "nothing set\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) show_bank(seq, cfg, iob);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) DEFINE_SHOW_ATTRIBUTE(io);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int __init s3c_freq_debugfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) dbgfs_root = debugfs_create_dir("s3c-cpufreq", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (IS_ERR(dbgfs_root)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) pr_err("%s: error creating debugfs root\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return PTR_ERR(dbgfs_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) dbgfs_file_io = debugfs_create_file("io-timing", S_IRUGO, dbgfs_root,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) NULL, &io_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) dbgfs_file_info = debugfs_create_file("info", S_IRUGO, dbgfs_root,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) NULL, &info_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) dbgfs_file_board = debugfs_create_file("board", S_IRUGO, dbgfs_root,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) NULL, &board_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) late_initcall(s3c_freq_debugfs_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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