drivers/soc/amlogic/meson-clk-measure.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2018 BayLibre, SAS
   4  * Author: Neil Armstrong <narmstrong@baylibre.com>
   5  */
   6
   7 #include <linux/of_address.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/bitfield.h>
  10 #include <linux/seq_file.h>
  11 #include <linux/debugfs.h>
  12 #include <linux/regmap.h>
  13 #include <linux/module.h>
  14
  15 static DEFINE_MUTEX(measure_lock);
  16
  17 #define MSR_CLK_DUTY            0x0
  18 #define MSR_CLK_REG0            0x4
  19 #define MSR_CLK_REG1            0x8
  20 #define MSR_CLK_REG2            0xc
  21
  22 #define MSR_DURATION            GENMASK(15, 0)
  23 #define MSR_ENABLE              BIT(16)
  24 #define MSR_CONT                BIT(17) /* continuous measurement */
  25 #define MSR_INTR                BIT(18) /* interrupts */
  26 #define MSR_RUN                 BIT(19)
  27 #define MSR_CLK_SRC             GENMASK(26, 20)
  28 #define MSR_BUSY                BIT(31)
  29
  30 #define MSR_VAL_MASK            GENMASK(15, 0)
  31
  32 #define DIV_MIN                 32
  33 #define DIV_STEP                32
  34 #define DIV_MAX                 640
  35
  36 #define CLK_MSR_MAX             128
  37
  38 struct meson_msr_id {
  39         struct meson_msr *priv;
  40         unsigned int id;
  41         const char *name;
  42 };
  43
  44 struct meson_msr {
  45         struct regmap *regmap;
  46         struct meson_msr_id msr_table[CLK_MSR_MAX];
  47 };
  48
  49 #define CLK_MSR_ID(__id, __name) \
  50         [__id] = {.id = __id, .name = __name,}
  51
  52 static struct meson_msr_id clk_msr_m8[CLK_MSR_MAX] = {
  53         CLK_MSR_ID(0, "ring_osc_out_ee0"),
  54         CLK_MSR_ID(1, "ring_osc_out_ee1"),
  55         CLK_MSR_ID(2, "ring_osc_out_ee2"),
  56         CLK_MSR_ID(3, "a9_ring_osck"),
  57         CLK_MSR_ID(6, "vid_pll"),
  58         CLK_MSR_ID(7, "clk81"),
  59         CLK_MSR_ID(8, "encp"),
  60         CLK_MSR_ID(9, "encl"),
  61         CLK_MSR_ID(11, "eth_rmii"),
  62         CLK_MSR_ID(13, "amclk"),
  63         CLK_MSR_ID(14, "fec_clk_0"),
  64         CLK_MSR_ID(15, "fec_clk_1"),
  65         CLK_MSR_ID(16, "fec_clk_2"),
  66         CLK_MSR_ID(18, "a9_clk_div16"),
  67         CLK_MSR_ID(19, "hdmi_sys"),
  68         CLK_MSR_ID(20, "rtc_osc_clk_out"),
  69         CLK_MSR_ID(21, "i2s_clk_in_src0"),
  70         CLK_MSR_ID(22, "clk_rmii_from_pad"),
  71         CLK_MSR_ID(23, "hdmi_ch0_tmds"),
  72         CLK_MSR_ID(24, "lvds_fifo"),
  73         CLK_MSR_ID(26, "sc_clk_int"),
  74         CLK_MSR_ID(28, "sar_adc"),
  75         CLK_MSR_ID(30, "mpll_clk_test_out"),
  76         CLK_MSR_ID(31, "audac_clkpi"),
  77         CLK_MSR_ID(32, "vdac"),
  78         CLK_MSR_ID(33, "sdhc_rx"),
  79         CLK_MSR_ID(34, "sdhc_sd"),
  80         CLK_MSR_ID(35, "mali"),
  81         CLK_MSR_ID(36, "hdmi_tx_pixel"),
  82         CLK_MSR_ID(38, "vdin_meas"),
  83         CLK_MSR_ID(39, "pcm_sclk"),
  84         CLK_MSR_ID(40, "pcm_mclk"),
  85         CLK_MSR_ID(41, "eth_rx_tx"),
  86         CLK_MSR_ID(42, "pwm_d"),
  87         CLK_MSR_ID(43, "pwm_c"),
  88         CLK_MSR_ID(44, "pwm_b"),
  89         CLK_MSR_ID(45, "pwm_a"),
  90         CLK_MSR_ID(46, "pcm2_sclk"),
  91         CLK_MSR_ID(47, "ddr_dpll_pt"),
  92         CLK_MSR_ID(48, "pwm_f"),
  93         CLK_MSR_ID(49, "pwm_e"),
  94         CLK_MSR_ID(59, "hcodec"),
  95         CLK_MSR_ID(60, "usb_32k_alt"),
  96         CLK_MSR_ID(61, "gpio"),
  97         CLK_MSR_ID(62, "vid2_pll"),
  98         CLK_MSR_ID(63, "mipi_csi_cfg"),
  99 };
 100
 101 static struct meson_msr_id clk_msr_gx[CLK_MSR_MAX] = {
 102         CLK_MSR_ID(0, "ring_osc_out_ee_0"),
 103         CLK_MSR_ID(1, "ring_osc_out_ee_1"),
 104         CLK_MSR_ID(2, "ring_osc_out_ee_2"),
 105         CLK_MSR_ID(3, "a53_ring_osc"),
 106         CLK_MSR_ID(4, "gp0_pll"),
 107         CLK_MSR_ID(6, "enci"),
 108         CLK_MSR_ID(7, "clk81"),
 109         CLK_MSR_ID(8, "encp"),
 110         CLK_MSR_ID(9, "encl"),
 111         CLK_MSR_ID(10, "vdac"),
 112         CLK_MSR_ID(11, "rgmii_tx"),
 113         CLK_MSR_ID(12, "pdm"),
 114         CLK_MSR_ID(13, "amclk"),
 115         CLK_MSR_ID(14, "fec_0"),
 116         CLK_MSR_ID(15, "fec_1"),
 117         CLK_MSR_ID(16, "fec_2"),
 118         CLK_MSR_ID(17, "sys_pll_div16"),
 119         CLK_MSR_ID(18, "sys_cpu_div16"),
 120         CLK_MSR_ID(19, "hdmitx_sys"),
 121         CLK_MSR_ID(20, "rtc_osc_out"),
 122         CLK_MSR_ID(21, "i2s_in_src0"),
 123         CLK_MSR_ID(22, "eth_phy_ref"),
 124         CLK_MSR_ID(23, "hdmi_todig"),
 125         CLK_MSR_ID(26, "sc_int"),
 126         CLK_MSR_ID(28, "sar_adc"),
 127         CLK_MSR_ID(31, "mpll_test_out"),
 128         CLK_MSR_ID(32, "vdec"),
 129         CLK_MSR_ID(35, "mali"),
 130         CLK_MSR_ID(36, "hdmi_tx_pixel"),
 131         CLK_MSR_ID(37, "i958"),
 132         CLK_MSR_ID(38, "vdin_meas"),
 133         CLK_MSR_ID(39, "pcm_sclk"),
 134         CLK_MSR_ID(40, "pcm_mclk"),
 135         CLK_MSR_ID(41, "eth_rx_or_rmii"),
 136         CLK_MSR_ID(42, "mp0_out"),
 137         CLK_MSR_ID(43, "fclk_div5"),
 138         CLK_MSR_ID(44, "pwm_b"),
 139         CLK_MSR_ID(45, "pwm_a"),
 140         CLK_MSR_ID(46, "vpu"),
 141         CLK_MSR_ID(47, "ddr_dpll_pt"),
 142         CLK_MSR_ID(48, "mp1_out"),
 143         CLK_MSR_ID(49, "mp2_out"),
 144         CLK_MSR_ID(50, "mp3_out"),
 145         CLK_MSR_ID(51, "nand_core"),
 146         CLK_MSR_ID(52, "sd_emmc_b"),
 147         CLK_MSR_ID(53, "sd_emmc_a"),
 148         CLK_MSR_ID(55, "vid_pll_div_out"),
 149         CLK_MSR_ID(56, "cci"),
 150         CLK_MSR_ID(57, "wave420l_c"),
 151         CLK_MSR_ID(58, "wave420l_b"),
 152         CLK_MSR_ID(59, "hcodec"),
 153         CLK_MSR_ID(60, "alt_32k"),
 154         CLK_MSR_ID(61, "gpio_msr"),
 155         CLK_MSR_ID(62, "hevc"),
 156         CLK_MSR_ID(66, "vid_lock"),
 157         CLK_MSR_ID(70, "pwm_f"),
 158         CLK_MSR_ID(71, "pwm_e"),
 159         CLK_MSR_ID(72, "pwm_d"),
 160         CLK_MSR_ID(73, "pwm_c"),
 161         CLK_MSR_ID(75, "aoclkx2_int"),
 162         CLK_MSR_ID(76, "aoclk_int"),
 163         CLK_MSR_ID(77, "rng_ring_osc_0"),
 164         CLK_MSR_ID(78, "rng_ring_osc_1"),
 165         CLK_MSR_ID(79, "rng_ring_osc_2"),
 166         CLK_MSR_ID(80, "rng_ring_osc_3"),
 167         CLK_MSR_ID(81, "vapb"),
 168         CLK_MSR_ID(82, "ge2d"),
 169 };
 170
 171 static struct meson_msr_id clk_msr_axg[CLK_MSR_MAX] = {
 172         CLK_MSR_ID(0, "ring_osc_out_ee_0"),
 173         CLK_MSR_ID(1, "ring_osc_out_ee_1"),
 174         CLK_MSR_ID(2, "ring_osc_out_ee_2"),
 175         CLK_MSR_ID(3, "a53_ring_osc"),
 176         CLK_MSR_ID(4, "gp0_pll"),
 177         CLK_MSR_ID(5, "gp1_pll"),
 178         CLK_MSR_ID(7, "clk81"),
 179         CLK_MSR_ID(9, "encl"),
 180         CLK_MSR_ID(17, "sys_pll_div16"),
 181         CLK_MSR_ID(18, "sys_cpu_div16"),
 182         CLK_MSR_ID(20, "rtc_osc_out"),
 183         CLK_MSR_ID(23, "mmc_clk"),
 184         CLK_MSR_ID(28, "sar_adc"),
 185         CLK_MSR_ID(31, "mpll_test_out"),
 186         CLK_MSR_ID(40, "mod_eth_tx_clk"),
 187         CLK_MSR_ID(41, "mod_eth_rx_clk_rmii"),
 188         CLK_MSR_ID(42, "mp0_out"),
 189         CLK_MSR_ID(43, "fclk_div5"),
 190         CLK_MSR_ID(44, "pwm_b"),
 191         CLK_MSR_ID(45, "pwm_a"),
 192         CLK_MSR_ID(46, "vpu"),
 193         CLK_MSR_ID(47, "ddr_dpll_pt"),
 194         CLK_MSR_ID(48, "mp1_out"),
 195         CLK_MSR_ID(49, "mp2_out"),
 196         CLK_MSR_ID(50, "mp3_out"),
 197         CLK_MSR_ID(51, "sd_emmm_c"),
 198         CLK_MSR_ID(52, "sd_emmc_b"),
 199         CLK_MSR_ID(61, "gpio_msr"),
 200         CLK_MSR_ID(66, "audio_slv_lrclk_c"),
 201         CLK_MSR_ID(67, "audio_slv_lrclk_b"),
 202         CLK_MSR_ID(68, "audio_slv_lrclk_a"),
 203         CLK_MSR_ID(69, "audio_slv_sclk_c"),
 204         CLK_MSR_ID(70, "audio_slv_sclk_b"),
 205         CLK_MSR_ID(71, "audio_slv_sclk_a"),
 206         CLK_MSR_ID(72, "pwm_d"),
 207         CLK_MSR_ID(73, "pwm_c"),
 208         CLK_MSR_ID(74, "wifi_beacon"),
 209         CLK_MSR_ID(75, "tdmin_lb_lrcl"),
 210         CLK_MSR_ID(76, "tdmin_lb_sclk"),
 211         CLK_MSR_ID(77, "rng_ring_osc_0"),
 212         CLK_MSR_ID(78, "rng_ring_osc_1"),
 213         CLK_MSR_ID(79, "rng_ring_osc_2"),
 214         CLK_MSR_ID(80, "rng_ring_osc_3"),
 215         CLK_MSR_ID(81, "vapb"),
 216         CLK_MSR_ID(82, "ge2d"),
 217         CLK_MSR_ID(84, "audio_resample"),
 218         CLK_MSR_ID(85, "audio_pdm_sys"),
 219         CLK_MSR_ID(86, "audio_spdifout"),
 220         CLK_MSR_ID(87, "audio_spdifin"),
 221         CLK_MSR_ID(88, "audio_lrclk_f"),
 222         CLK_MSR_ID(89, "audio_lrclk_e"),
 223         CLK_MSR_ID(90, "audio_lrclk_d"),
 224         CLK_MSR_ID(91, "audio_lrclk_c"),
 225         CLK_MSR_ID(92, "audio_lrclk_b"),
 226         CLK_MSR_ID(93, "audio_lrclk_a"),
 227         CLK_MSR_ID(94, "audio_sclk_f"),
 228         CLK_MSR_ID(95, "audio_sclk_e"),
 229         CLK_MSR_ID(96, "audio_sclk_d"),
 230         CLK_MSR_ID(97, "audio_sclk_c"),
 231         CLK_MSR_ID(98, "audio_sclk_b"),
 232         CLK_MSR_ID(99, "audio_sclk_a"),
 233         CLK_MSR_ID(100, "audio_mclk_f"),
 234         CLK_MSR_ID(101, "audio_mclk_e"),
 235         CLK_MSR_ID(102, "audio_mclk_d"),
 236         CLK_MSR_ID(103, "audio_mclk_c"),
 237         CLK_MSR_ID(104, "audio_mclk_b"),
 238         CLK_MSR_ID(105, "audio_mclk_a"),
 239         CLK_MSR_ID(106, "pcie_refclk_n"),
 240         CLK_MSR_ID(107, "pcie_refclk_p"),
 241         CLK_MSR_ID(108, "audio_locker_out"),
 242         CLK_MSR_ID(109, "audio_locker_in"),
 243 };
 244
 245 static struct meson_msr_id clk_msr_g12a[CLK_MSR_MAX] = {
 246         CLK_MSR_ID(0, "ring_osc_out_ee_0"),
 247         CLK_MSR_ID(1, "ring_osc_out_ee_1"),
 248         CLK_MSR_ID(2, "ring_osc_out_ee_2"),
 249         CLK_MSR_ID(3, "sys_cpu_ring_osc"),
 250         CLK_MSR_ID(4, "gp0_pll"),
 251         CLK_MSR_ID(6, "enci"),
 252         CLK_MSR_ID(7, "clk81"),
 253         CLK_MSR_ID(8, "encp"),
 254         CLK_MSR_ID(9, "encl"),
 255         CLK_MSR_ID(10, "vdac"),
 256         CLK_MSR_ID(11, "eth_tx"),
 257         CLK_MSR_ID(12, "hifi_pll"),
 258         CLK_MSR_ID(13, "mod_tcon"),
 259         CLK_MSR_ID(14, "fec_0"),
 260         CLK_MSR_ID(15, "fec_1"),
 261         CLK_MSR_ID(16, "fec_2"),
 262         CLK_MSR_ID(17, "sys_pll_div16"),
 263         CLK_MSR_ID(18, "sys_cpu_div16"),
 264         CLK_MSR_ID(19, "lcd_an_ph2"),
 265         CLK_MSR_ID(20, "rtc_osc_out"),
 266         CLK_MSR_ID(21, "lcd_an_ph3"),
 267         CLK_MSR_ID(22, "eth_phy_ref"),
 268         CLK_MSR_ID(23, "mpll_50m"),
 269         CLK_MSR_ID(24, "eth_125m"),
 270         CLK_MSR_ID(25, "eth_rmii"),
 271         CLK_MSR_ID(26, "sc_int"),
 272         CLK_MSR_ID(27, "in_mac"),
 273         CLK_MSR_ID(28, "sar_adc"),
 274         CLK_MSR_ID(29, "pcie_inp"),
 275         CLK_MSR_ID(30, "pcie_inn"),
 276         CLK_MSR_ID(31, "mpll_test_out"),
 277         CLK_MSR_ID(32, "vdec"),
 278         CLK_MSR_ID(33, "sys_cpu_ring_osc_1"),
 279         CLK_MSR_ID(34, "eth_mpll_50m"),
 280         CLK_MSR_ID(35, "mali"),
 281         CLK_MSR_ID(36, "hdmi_tx_pixel"),
 282         CLK_MSR_ID(37, "cdac"),
 283         CLK_MSR_ID(38, "vdin_meas"),
 284         CLK_MSR_ID(39, "bt656"),
 285         CLK_MSR_ID(41, "eth_rx_or_rmii"),
 286         CLK_MSR_ID(42, "mp0_out"),
 287         CLK_MSR_ID(43, "fclk_div5"),
 288         CLK_MSR_ID(44, "pwm_b"),
 289         CLK_MSR_ID(45, "pwm_a"),
 290         CLK_MSR_ID(46, "vpu"),
 291         CLK_MSR_ID(47, "ddr_dpll_pt"),
 292         CLK_MSR_ID(48, "mp1_out"),
 293         CLK_MSR_ID(49, "mp2_out"),
 294         CLK_MSR_ID(50, "mp3_out"),
 295         CLK_MSR_ID(51, "sd_emmc_c"),
 296         CLK_MSR_ID(52, "sd_emmc_b"),
 297         CLK_MSR_ID(53, "sd_emmc_a"),
 298         CLK_MSR_ID(54, "vpu_clkc"),
 299         CLK_MSR_ID(55, "vid_pll_div_out"),
 300         CLK_MSR_ID(56, "wave420l_a"),
 301         CLK_MSR_ID(57, "wave420l_c"),
 302         CLK_MSR_ID(58, "wave420l_b"),
 303         CLK_MSR_ID(59, "hcodec"),
 304         CLK_MSR_ID(61, "gpio_msr"),
 305         CLK_MSR_ID(62, "hevcb"),
 306         CLK_MSR_ID(63, "dsi_meas"),
 307         CLK_MSR_ID(64, "spicc_1"),
 308         CLK_MSR_ID(65, "spicc_0"),
 309         CLK_MSR_ID(66, "vid_lock"),
 310         CLK_MSR_ID(67, "dsi_phy"),
 311         CLK_MSR_ID(68, "hdcp22_esm"),
 312         CLK_MSR_ID(69, "hdcp22_skp"),
 313         CLK_MSR_ID(70, "pwm_f"),
 314         CLK_MSR_ID(71, "pwm_e"),
 315         CLK_MSR_ID(72, "pwm_d"),
 316         CLK_MSR_ID(73, "pwm_c"),
 317         CLK_MSR_ID(75, "hevcf"),
 318         CLK_MSR_ID(77, "rng_ring_osc_0"),
 319         CLK_MSR_ID(78, "rng_ring_osc_1"),
 320         CLK_MSR_ID(79, "rng_ring_osc_2"),
 321         CLK_MSR_ID(80, "rng_ring_osc_3"),
 322         CLK_MSR_ID(81, "vapb"),
 323         CLK_MSR_ID(82, "ge2d"),
 324         CLK_MSR_ID(83, "co_rx"),
 325         CLK_MSR_ID(84, "co_tx"),
 326         CLK_MSR_ID(89, "hdmi_todig"),
 327         CLK_MSR_ID(90, "hdmitx_sys"),
 328         CLK_MSR_ID(91, "sys_cpub_div16"),
 329         CLK_MSR_ID(92, "sys_pll_cpub_div16"),
 330         CLK_MSR_ID(94, "eth_phy_rx"),
 331         CLK_MSR_ID(95, "eth_phy_pll"),
 332         CLK_MSR_ID(96, "vpu_b"),
 333         CLK_MSR_ID(97, "cpu_b_tmp"),
 334         CLK_MSR_ID(98, "ts"),
 335         CLK_MSR_ID(99, "ring_osc_out_ee_3"),
 336         CLK_MSR_ID(100, "ring_osc_out_ee_4"),
 337         CLK_MSR_ID(101, "ring_osc_out_ee_5"),
 338         CLK_MSR_ID(102, "ring_osc_out_ee_6"),
 339         CLK_MSR_ID(103, "ring_osc_out_ee_7"),
 340         CLK_MSR_ID(104, "ring_osc_out_ee_8"),
 341         CLK_MSR_ID(105, "ring_osc_out_ee_9"),
 342         CLK_MSR_ID(106, "ephy_test"),
 343         CLK_MSR_ID(107, "au_dac_g128x"),
 344         CLK_MSR_ID(108, "audio_locker_out"),
 345         CLK_MSR_ID(109, "audio_locker_in"),
 346         CLK_MSR_ID(110, "audio_tdmout_c_sclk"),
 347         CLK_MSR_ID(111, "audio_tdmout_b_sclk"),
 348         CLK_MSR_ID(112, "audio_tdmout_a_sclk"),
 349         CLK_MSR_ID(113, "audio_tdmin_lb_sclk"),
 350         CLK_MSR_ID(114, "audio_tdmin_c_sclk"),
 351         CLK_MSR_ID(115, "audio_tdmin_b_sclk"),
 352         CLK_MSR_ID(116, "audio_tdmin_a_sclk"),
 353         CLK_MSR_ID(117, "audio_resample"),
 354         CLK_MSR_ID(118, "audio_pdm_sys"),
 355         CLK_MSR_ID(119, "audio_spdifout_b"),
 356         CLK_MSR_ID(120, "audio_spdifout"),
 357         CLK_MSR_ID(121, "audio_spdifin"),
 358         CLK_MSR_ID(122, "audio_pdm_dclk"),
 359 };
 360
 361 static struct meson_msr_id clk_msr_sm1[CLK_MSR_MAX] = {
 362         CLK_MSR_ID(0, "ring_osc_out_ee_0"),
 363         CLK_MSR_ID(1, "ring_osc_out_ee_1"),
 364         CLK_MSR_ID(2, "ring_osc_out_ee_2"),
 365         CLK_MSR_ID(3, "ring_osc_out_ee_3"),
 366         CLK_MSR_ID(4, "gp0_pll"),
 367         CLK_MSR_ID(5, "gp1_pll"),
 368         CLK_MSR_ID(6, "enci"),
 369         CLK_MSR_ID(7, "clk81"),
 370         CLK_MSR_ID(8, "encp"),
 371         CLK_MSR_ID(9, "encl"),
 372         CLK_MSR_ID(10, "vdac"),
 373         CLK_MSR_ID(11, "eth_tx"),
 374         CLK_MSR_ID(12, "hifi_pll"),
 375         CLK_MSR_ID(13, "mod_tcon"),
 376         CLK_MSR_ID(14, "fec_0"),
 377         CLK_MSR_ID(15, "fec_1"),
 378         CLK_MSR_ID(16, "fec_2"),
 379         CLK_MSR_ID(17, "sys_pll_div16"),
 380         CLK_MSR_ID(18, "sys_cpu_div16"),
 381         CLK_MSR_ID(19, "lcd_an_ph2"),
 382         CLK_MSR_ID(20, "rtc_osc_out"),
 383         CLK_MSR_ID(21, "lcd_an_ph3"),
 384         CLK_MSR_ID(22, "eth_phy_ref"),
 385         CLK_MSR_ID(23, "mpll_50m"),
 386         CLK_MSR_ID(24, "eth_125m"),
 387         CLK_MSR_ID(25, "eth_rmii"),
 388         CLK_MSR_ID(26, "sc_int"),
 389         CLK_MSR_ID(27, "in_mac"),
 390         CLK_MSR_ID(28, "sar_adc"),
 391         CLK_MSR_ID(29, "pcie_inp"),
 392         CLK_MSR_ID(30, "pcie_inn"),
 393         CLK_MSR_ID(31, "mpll_test_out"),
 394         CLK_MSR_ID(32, "vdec"),
 395         CLK_MSR_ID(34, "eth_mpll_50m"),
 396         CLK_MSR_ID(35, "mali"),
 397         CLK_MSR_ID(36, "hdmi_tx_pixel"),
 398         CLK_MSR_ID(37, "cdac"),
 399         CLK_MSR_ID(38, "vdin_meas"),
 400         CLK_MSR_ID(39, "bt656"),
 401         CLK_MSR_ID(40, "arm_ring_osc_out_4"),
 402         CLK_MSR_ID(41, "eth_rx_or_rmii"),
 403         CLK_MSR_ID(42, "mp0_out"),
 404         CLK_MSR_ID(43, "fclk_div5"),
 405         CLK_MSR_ID(44, "pwm_b"),
 406         CLK_MSR_ID(45, "pwm_a"),
 407         CLK_MSR_ID(46, "vpu"),
 408         CLK_MSR_ID(47, "ddr_dpll_pt"),
 409         CLK_MSR_ID(48, "mp1_out"),
 410         CLK_MSR_ID(49, "mp2_out"),
 411         CLK_MSR_ID(50, "mp3_out"),
 412         CLK_MSR_ID(51, "sd_emmc_c"),
 413         CLK_MSR_ID(52, "sd_emmc_b"),
 414         CLK_MSR_ID(53, "sd_emmc_a"),
 415         CLK_MSR_ID(54, "vpu_clkc"),
 416         CLK_MSR_ID(55, "vid_pll_div_out"),
 417         CLK_MSR_ID(56, "wave420l_a"),
 418         CLK_MSR_ID(57, "wave420l_c"),
 419         CLK_MSR_ID(58, "wave420l_b"),
 420         CLK_MSR_ID(59, "hcodec"),
 421         CLK_MSR_ID(60, "arm_ring_osc_out_5"),
 422         CLK_MSR_ID(61, "gpio_msr"),
 423         CLK_MSR_ID(62, "hevcb"),
 424         CLK_MSR_ID(63, "dsi_meas"),
 425         CLK_MSR_ID(64, "spicc_1"),
 426         CLK_MSR_ID(65, "spicc_0"),
 427         CLK_MSR_ID(66, "vid_lock"),
 428         CLK_MSR_ID(67, "dsi_phy"),
 429         CLK_MSR_ID(68, "hdcp22_esm"),
 430         CLK_MSR_ID(69, "hdcp22_skp"),
 431         CLK_MSR_ID(70, "pwm_f"),
 432         CLK_MSR_ID(71, "pwm_e"),
 433         CLK_MSR_ID(72, "pwm_d"),
 434         CLK_MSR_ID(73, "pwm_c"),
 435         CLK_MSR_ID(74, "arm_ring_osc_out_6"),
 436         CLK_MSR_ID(75, "hevcf"),
 437         CLK_MSR_ID(76, "arm_ring_osc_out_7"),
 438         CLK_MSR_ID(77, "rng_ring_osc_0"),
 439         CLK_MSR_ID(78, "rng_ring_osc_1"),
 440         CLK_MSR_ID(79, "rng_ring_osc_2"),
 441         CLK_MSR_ID(80, "rng_ring_osc_3"),
 442         CLK_MSR_ID(81, "vapb"),
 443         CLK_MSR_ID(82, "ge2d"),
 444         CLK_MSR_ID(83, "co_rx"),
 445         CLK_MSR_ID(84, "co_tx"),
 446         CLK_MSR_ID(85, "arm_ring_osc_out_8"),
 447         CLK_MSR_ID(86, "arm_ring_osc_out_9"),
 448         CLK_MSR_ID(87, "mipi_dsi_phy"),
 449         CLK_MSR_ID(88, "cis2_adapt"),
 450         CLK_MSR_ID(89, "hdmi_todig"),
 451         CLK_MSR_ID(90, "hdmitx_sys"),
 452         CLK_MSR_ID(91, "nna_core"),
 453         CLK_MSR_ID(92, "nna_axi"),
 454         CLK_MSR_ID(93, "vad"),
 455         CLK_MSR_ID(94, "eth_phy_rx"),
 456         CLK_MSR_ID(95, "eth_phy_pll"),
 457         CLK_MSR_ID(96, "vpu_b"),
 458         CLK_MSR_ID(97, "cpu_b_tmp"),
 459         CLK_MSR_ID(98, "ts"),
 460         CLK_MSR_ID(99, "arm_ring_osc_out_10"),
 461         CLK_MSR_ID(100, "arm_ring_osc_out_11"),
 462         CLK_MSR_ID(101, "arm_ring_osc_out_12"),
 463         CLK_MSR_ID(102, "arm_ring_osc_out_13"),
 464         CLK_MSR_ID(103, "arm_ring_osc_out_14"),
 465         CLK_MSR_ID(104, "arm_ring_osc_out_15"),
 466         CLK_MSR_ID(105, "arm_ring_osc_out_16"),
 467         CLK_MSR_ID(106, "ephy_test"),
 468         CLK_MSR_ID(107, "au_dac_g128x"),
 469         CLK_MSR_ID(108, "audio_locker_out"),
 470         CLK_MSR_ID(109, "audio_locker_in"),
 471         CLK_MSR_ID(110, "audio_tdmout_c_sclk"),
 472         CLK_MSR_ID(111, "audio_tdmout_b_sclk"),
 473         CLK_MSR_ID(112, "audio_tdmout_a_sclk"),
 474         CLK_MSR_ID(113, "audio_tdmin_lb_sclk"),
 475         CLK_MSR_ID(114, "audio_tdmin_c_sclk"),
 476         CLK_MSR_ID(115, "audio_tdmin_b_sclk"),
 477         CLK_MSR_ID(116, "audio_tdmin_a_sclk"),
 478         CLK_MSR_ID(117, "audio_resample"),
 479         CLK_MSR_ID(118, "audio_pdm_sys"),
 480         CLK_MSR_ID(119, "audio_spdifout_b"),
 481         CLK_MSR_ID(120, "audio_spdifout"),
 482         CLK_MSR_ID(121, "audio_spdifin"),
 483         CLK_MSR_ID(122, "audio_pdm_dclk"),
 484         CLK_MSR_ID(123, "audio_resampled"),
 485         CLK_MSR_ID(124, "earcrx_pll"),
 486         CLK_MSR_ID(125, "earcrx_pll_test"),
 487         CLK_MSR_ID(126, "csi_phy0"),
 488         CLK_MSR_ID(127, "csi2_data"),
 489 };
 490
 491 static int meson_measure_id(struct meson_msr_id *clk_msr_id,
 492                                unsigned int duration)
 493 {
 494         struct meson_msr *priv = clk_msr_id->priv;
 495         unsigned int val;
 496         int ret;
 497
 498         ret = mutex_lock_interruptible(&measure_lock);
 499         if (ret)
 500                 return ret;
 501
 502         regmap_write(priv->regmap, MSR_CLK_REG0, 0);
 503
 504         /* Set measurement duration */
 505         regmap_update_bits(priv->regmap, MSR_CLK_REG0, MSR_DURATION,
 506                            FIELD_PREP(MSR_DURATION, duration - 1));
 507
 508         /* Set ID */
 509         regmap_update_bits(priv->regmap, MSR_CLK_REG0, MSR_CLK_SRC,
 510                            FIELD_PREP(MSR_CLK_SRC, clk_msr_id->id));
 511
 512         /* Enable & Start */
 513         regmap_update_bits(priv->regmap, MSR_CLK_REG0,
 514                            MSR_RUN | MSR_ENABLE,
 515                            MSR_RUN | MSR_ENABLE);
 516
 517         ret = regmap_read_poll_timeout(priv->regmap, MSR_CLK_REG0,
 518                                        val, !(val & MSR_BUSY), 10, 10000);
 519         if (ret) {
 520                 mutex_unlock(&measure_lock);
 521                 return ret;
 522         }
 523
 524         /* Disable */
 525         regmap_update_bits(priv->regmap, MSR_CLK_REG0, MSR_ENABLE, 0);
 526
 527         /* Get the value in multiple of gate time counts */
 528         regmap_read(priv->regmap, MSR_CLK_REG2, &val);
 529
 530         mutex_unlock(&measure_lock);
 531
 532         if (val >= MSR_VAL_MASK)
 533                 return -EINVAL;
 534
 535         return DIV_ROUND_CLOSEST_ULL((val & MSR_VAL_MASK) * 1000000ULL,
 536                                      duration);
 537 }
 538
 539 static int meson_measure_best_id(struct meson_msr_id *clk_msr_id,
 540                                     unsigned int *precision)
 541 {
 542         unsigned int duration = DIV_MAX;
 543         int ret;
 544
 545         /* Start from max duration and down to min duration */
 546         do {
 547                 ret = meson_measure_id(clk_msr_id, duration);
 548                 if (ret >= 0)
 549                         *precision = (2 * 1000000) / duration;
 550                 else
 551                         duration -= DIV_STEP;
 552         } while (duration >= DIV_MIN && ret == -EINVAL);
 553
 554         return ret;
 555 }
 556
 557 static int clk_msr_show(struct seq_file *s, void *data)
 558 {
 559         struct meson_msr_id *clk_msr_id = s->private;
 560         unsigned int precision = 0;
 561         int val;
 562
 563         val = meson_measure_best_id(clk_msr_id, &precision);
 564         if (val < 0)
 565                 return val;
 566
 567         seq_printf(s, "%d\t+/-%dHz\n", val, precision);
 568
 569         return 0;
 570 }
 571 DEFINE_SHOW_ATTRIBUTE(clk_msr);
 572
 573 static int clk_msr_summary_show(struct seq_file *s, void *data)
 574 {
 575         struct meson_msr_id *msr_table = s->private;
 576         unsigned int precision = 0;
 577         int val, i;
 578
 579         seq_puts(s, "  clock                     rate    precision\n");
 580         seq_puts(s, "---------------------------------------------\n");
 581
 582         for (i = 0 ; i < CLK_MSR_MAX ; ++i) {
 583                 if (!msr_table[i].name)
 584                         continue;
 585
 586                 val = meson_measure_best_id(&msr_table[i], &precision);
 587                 if (val < 0)
 588                         return val;
 589
 590                 seq_printf(s, " %-20s %10d    +/-%dHz\n",
 591                            msr_table[i].name, val, precision);
 592         }
 593
 594         return 0;
 595 }
 596 DEFINE_SHOW_ATTRIBUTE(clk_msr_summary);
 597
 598 static const struct regmap_config meson_clk_msr_regmap_config = {
 599         .reg_bits = 32,
 600         .val_bits = 32,
 601         .reg_stride = 4,
 602         .max_register = MSR_CLK_REG2,
 603 };
 604
 605 static int meson_msr_probe(struct platform_device *pdev)
 606 {
 607         const struct meson_msr_id *match_data;
 608         struct meson_msr *priv;
 609         struct dentry *root, *clks;
 610         void __iomem *base;
 611         int i;
 612
 613         priv = devm_kzalloc(&pdev->dev, sizeof(struct meson_msr),
 614                             GFP_KERNEL);
 615         if (!priv)
 616                 return -ENOMEM;
 617
 618         match_data = device_get_match_data(&pdev->dev);
 619         if (!match_data) {
 620                 dev_err(&pdev->dev, "failed to get match data\n");
 621                 return -ENODEV;
 622         }
 623
 624         memcpy(priv->msr_table, match_data, sizeof(priv->msr_table));
 625
 626         base = devm_platform_ioremap_resource(pdev, 0);
 627         if (IS_ERR(base))
 628                 return PTR_ERR(base);
 629
 630         priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
 631                                              &meson_clk_msr_regmap_config);
 632         if (IS_ERR(priv->regmap))
 633                 return PTR_ERR(priv->regmap);
 634
 635         root = debugfs_create_dir("meson-clk-msr", NULL);
 636         clks = debugfs_create_dir("clks", root);
 637
 638         debugfs_create_file("measure_summary", 0444, root,
 639                             priv->msr_table, &clk_msr_summary_fops);
 640
 641         for (i = 0 ; i < CLK_MSR_MAX ; ++i) {
 642                 if (!priv->msr_table[i].name)
 643                         continue;
 644
 645                 priv->msr_table[i].priv = priv;
 646
 647                 debugfs_create_file(priv->msr_table[i].name, 0444, clks,
 648                                     &priv->msr_table[i], &clk_msr_fops);
 649         }
 650
 651         return 0;
 652 }
 653
 654 static const struct of_device_id meson_msr_match_table[] = {
 655         {
 656                 .compatible = "amlogic,meson-gx-clk-measure",
 657                 .data = (void *)clk_msr_gx,
 658         },
 659         {
 660                 .compatible = "amlogic,meson8-clk-measure",
 661                 .data = (void *)clk_msr_m8,
 662         },
 663         {
 664                 .compatible = "amlogic,meson8b-clk-measure",
 665                 .data = (void *)clk_msr_m8,
 666         },
 667         {
 668                 .compatible = "amlogic,meson-axg-clk-measure",
 669                 .data = (void *)clk_msr_axg,
 670         },
 671         {
 672                 .compatible = "amlogic,meson-g12a-clk-measure",
 673                 .data = (void *)clk_msr_g12a,
 674         },
 675         {
 676                 .compatible = "amlogic,meson-sm1-clk-measure",
 677                 .data = (void *)clk_msr_sm1,
 678         },
 679         { /* sentinel */ }
 680 };
 681 MODULE_DEVICE_TABLE(of, meson_msr_match_table);
 682
 683 static struct platform_driver meson_msr_driver = {
 684         .probe  = meson_msr_probe,
 685         .driver = {
 686                 .name           = "meson_msr",
 687                 .of_match_table = meson_msr_match_table,
 688         },
 689 };
 690 module_platform_driver(meson_msr_driver);
 691 MODULE_LICENSE("GPL v2");