arch/arm/mach-shmobile/clock-r8a73a4.c

   1 /*
   2  * r8a73a4 clock framework support
   3  *
   4  * Copyright (C) 2013  Renesas Solutions Corp.
   5  * Copyright (C) 2013  Magnus Damm
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20 #include <linux/init.h>
  21 #include <linux/io.h>
  22 #include <linux/kernel.h>
  23 #include <linux/sh_clk.h>
  24 #include <linux/clkdev.h>
  25 #include <mach/clock.h>
  26 #include <mach/common.h>
  27
  28 #define CPG_BASE 0xe6150000
  29 #define CPG_LEN 0x270
  30
  31 #define SMSTPCR2 0xe6150138
  32 #define SMSTPCR3 0xe615013c
  33 #define SMSTPCR5 0xe6150144
  34
  35 #define FRQCRA          0xE6150000
  36 #define FRQCRB          0xE6150004
  37 #define VCLKCR1         0xE6150008
  38 #define VCLKCR2         0xE615000C
  39 #define VCLKCR3         0xE615001C
  40 #define VCLKCR4         0xE6150014
  41 #define VCLKCR5         0xE6150034
  42 #define ZBCKCR          0xE6150010
  43 #define SD0CKCR         0xE6150074
  44 #define SD1CKCR         0xE6150078
  45 #define SD2CKCR         0xE615007C
  46 #define MMC0CKCR        0xE6150240
  47 #define MMC1CKCR        0xE6150244
  48 #define FSIACKCR        0xE6150018
  49 #define FSIBCKCR        0xE6150090
  50 #define MPCKCR          0xe6150080
  51 #define SPUVCKCR        0xE6150094
  52 #define HSICKCR         0xE615026C
  53 #define M4CKCR          0xE6150098
  54 #define PLLECR          0xE61500D0
  55 #define PLL1CR          0xE6150028
  56 #define PLL2CR          0xE615002C
  57 #define PLL2SCR         0xE61501F4
  58 #define PLL2HCR         0xE61501E4
  59 #define CKSCR           0xE61500C0
  60
  61 #define CPG_MAP(o) ((o - CPG_BASE) + cpg_mapping.base)
  62
  63 static struct clk_mapping cpg_mapping = {
  64         .phys   = CPG_BASE,
  65         .len    = CPG_LEN,
  66 };
  67
  68 static struct clk extalr_clk = {
  69         .rate   = 32768,
  70         .mapping        = &cpg_mapping,
  71 };
  72
  73 static struct clk extal1_clk = {
  74         .rate   = 26000000,
  75         .mapping        = &cpg_mapping,
  76 };
  77
  78 static struct clk extal2_clk = {
  79         .rate   = 48000000,
  80         .mapping        = &cpg_mapping,
  81 };
  82
  83 static struct sh_clk_ops followparent_clk_ops = {
  84         .recalc = followparent_recalc,
  85 };
  86
  87 static struct clk main_clk = {
  88         /* .parent will be set r8a73a4_clock_init */
  89         .ops    = &followparent_clk_ops,
  90 };
  91
  92 SH_CLK_RATIO(div2,      1, 2);
  93 SH_CLK_RATIO(div4,      1, 4);
  94
  95 SH_FIXED_RATIO_CLK(main_div2_clk,       main_clk,               div2);
  96 SH_FIXED_RATIO_CLK(extal1_div2_clk,     extal1_clk,             div2);
  97 SH_FIXED_RATIO_CLK(extal2_div2_clk,     extal2_clk,             div2);
  98 SH_FIXED_RATIO_CLK(extal2_div4_clk,     extal2_clk,             div4);
  99
 100 /* External FSIACK/FSIBCK clock */
 101 static struct clk fsiack_clk = {
 102 };
 103
 104 static struct clk fsibck_clk = {
 105 };
 106
 107 /*
 108  *              PLL clocks
 109  */
 110 static struct clk *pll_parent_main[] = {
 111         [0] = &main_clk,
 112         [1] = &main_div2_clk
 113 };
 114
 115 static struct clk *pll_parent_main_extal[8] = {
 116         [0] = &main_div2_clk,
 117         [1] = &extal2_div2_clk,
 118         [3] = &extal2_div4_clk,
 119         [4] = &main_clk,
 120         [5] = &extal2_clk,
 121 };
 122
 123 static unsigned long pll_recalc(struct clk *clk)
 124 {
 125         unsigned long mult = 1;
 126
 127         if (ioread32(CPG_MAP(PLLECR)) & (1 << clk->enable_bit))
 128                 mult = (((ioread32(clk->mapped_reg) >> 24) & 0x7f) + 1);
 129
 130         return clk->parent->rate * mult;
 131 }
 132
 133 static int pll_set_parent(struct clk *clk, struct clk *parent)
 134 {
 135         u32 val;
 136         int i, ret;
 137
 138         if (!clk->parent_table || !clk->parent_num)
 139                 return -EINVAL;
 140
 141         /* Search the parent */
 142         for (i = 0; i < clk->parent_num; i++)
 143                 if (clk->parent_table[i] == parent)
 144                         break;
 145
 146         if (i == clk->parent_num)
 147                 return -ENODEV;
 148
 149         ret = clk_reparent(clk, parent);
 150         if (ret < 0)
 151                 return ret;
 152
 153         val = ioread32(clk->mapped_reg) &
 154                 ~(((1 << clk->src_width) - 1) << clk->src_shift);
 155
 156         iowrite32(val | i << clk->src_shift, clk->mapped_reg);
 157
 158         return 0;
 159 }
 160
 161 static struct sh_clk_ops pll_clk_ops = {
 162         .recalc         = pll_recalc,
 163         .set_parent     = pll_set_parent,
 164 };
 165
 166 #define PLL_CLOCK(name, p, pt, w, s, reg, e)            \
 167         static struct clk name = {                      \
 168                 .ops            = &pll_clk_ops,         \
 169                 .flags          = CLK_ENABLE_ON_INIT,   \
 170                 .parent         = p,                    \
 171                 .parent_table   = pt,                   \
 172                 .parent_num     = ARRAY_SIZE(pt),       \
 173                 .src_width      = w,                    \
 174                 .src_shift      = s,                    \
 175                 .enable_reg     = (void __iomem *)reg,  \
 176                 .enable_bit     = e,                    \
 177                 .mapping        = &cpg_mapping,         \
 178         }
 179
 180 PLL_CLOCK(pll1_clk,  &main_clk,      pll_parent_main,       1, 7, PLL1CR,  1);
 181 PLL_CLOCK(pll2_clk,  &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2CR,  2);
 182 PLL_CLOCK(pll2s_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2SCR, 4);
 183 PLL_CLOCK(pll2h_clk, &main_div2_clk, pll_parent_main_extal, 3, 5, PLL2HCR, 5);
 184
 185 SH_FIXED_RATIO_CLK(pll1_div2_clk,       pll1_clk,       div2);
 186
 187 static struct clk *main_clks[] = {
 188         &extalr_clk,
 189         &extal1_clk,
 190         &extal1_div2_clk,
 191         &extal2_clk,
 192         &extal2_div2_clk,
 193         &extal2_div4_clk,
 194         &main_clk,
 195         &main_div2_clk,
 196         &fsiack_clk,
 197         &fsibck_clk,
 198         &pll1_clk,
 199         &pll1_div2_clk,
 200         &pll2_clk,
 201         &pll2s_clk,
 202         &pll2h_clk,
 203 };
 204
 205 /* DIV4 */
 206 static void div4_kick(struct clk *clk)
 207 {
 208         unsigned long value;
 209
 210         /* set KICK bit in FRQCRB to update hardware setting */
 211         value = ioread32(CPG_MAP(FRQCRB));
 212         value |= (1 << 31);
 213         iowrite32(value, CPG_MAP(FRQCRB));
 214 }
 215
 216 static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18, 24, 0, 36, 48, 10};
 217
 218 static struct clk_div_mult_table div4_div_mult_table = {
 219         .divisors       = divisors,
 220         .nr_divisors    = ARRAY_SIZE(divisors),
 221 };
 222
 223 static struct clk_div4_table div4_table = {
 224         .div_mult_table = &div4_div_mult_table,
 225         .kick           = div4_kick,
 226 };
 227
 228 enum {
 229         DIV4_I, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2,
 230         DIV4_ZX, DIV4_ZS, DIV4_HP,
 231         DIV4_NR };
 232
 233 static struct clk div4_clks[DIV4_NR] = {
 234         [DIV4_I]        = SH_CLK_DIV4(&pll1_clk, FRQCRA, 20, 0x0dff, CLK_ENABLE_ON_INIT),
 235         [DIV4_M3]       = SH_CLK_DIV4(&pll1_clk, FRQCRA, 12, 0x1dff, CLK_ENABLE_ON_INIT),
 236         [DIV4_B]        = SH_CLK_DIV4(&pll1_clk, FRQCRA,  8, 0x0dff, CLK_ENABLE_ON_INIT),
 237         [DIV4_M1]       = SH_CLK_DIV4(&pll1_clk, FRQCRA,  4, 0x1dff, 0),
 238         [DIV4_M2]       = SH_CLK_DIV4(&pll1_clk, FRQCRA,  0, 0x1dff, 0),
 239         [DIV4_ZX]       = SH_CLK_DIV4(&pll1_clk, FRQCRB, 12, 0x0dff, 0),
 240         [DIV4_ZS]       = SH_CLK_DIV4(&pll1_clk, FRQCRB,  8, 0x0dff, 0),
 241         [DIV4_HP]       = SH_CLK_DIV4(&pll1_clk, FRQCRB,  4, 0x0dff, 0),
 242 };
 243
 244 enum {
 245         DIV6_ZB,
 246         DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2,
 247         DIV6_MMC0, DIV6_MMC1,
 248         DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_VCK4, DIV6_VCK5,
 249         DIV6_FSIA, DIV6_FSIB,
 250         DIV6_MP, DIV6_M4, DIV6_HSI, DIV6_SPUV,
 251         DIV6_NR };
 252
 253 static struct clk *div6_parents[8] = {
 254         [0] = &pll1_div2_clk,
 255         [1] = &pll2s_clk,
 256         [3] = &extal2_clk,
 257         [4] = &main_div2_clk,
 258         [6] = &extalr_clk,
 259 };
 260
 261 static struct clk *fsia_parents[4] = {
 262         [0] = &pll1_div2_clk,
 263         [1] = &pll2s_clk,
 264         [2] = &fsiack_clk,
 265 };
 266
 267 static struct clk *fsib_parents[4] = {
 268         [0] = &pll1_div2_clk,
 269         [1] = &pll2s_clk,
 270         [2] = &fsibck_clk,
 271 };
 272
 273 static struct clk *mp_parents[4] = {
 274         [0] = &pll1_div2_clk,
 275         [1] = &pll2s_clk,
 276         [2] = &extal2_clk,
 277         [3] = &extal2_clk,
 278 };
 279
 280 static struct clk *m4_parents[2] = {
 281         [0] = &pll2s_clk,
 282 };
 283
 284 static struct clk *hsi_parents[4] = {
 285         [0] = &pll2h_clk,
 286         [1] = &pll1_div2_clk,
 287         [3] = &pll2s_clk,
 288 };
 289
 290 /*** FIXME ***
 291  * SH_CLK_DIV6_EXT() macro doesn't care .mapping
 292  * but, it is necessary on R-Car (= ioremap() base CPG)
 293  * The difference between
 294  * SH_CLK_DIV6_EXT() <--> SH_CLK_MAP_DIV6_EXT()
 295  * is only .mapping
 296  */
 297 #define SH_CLK_MAP_DIV6_EXT(_reg, _flags, _parents,                     \
 298                             _num_parents, _src_shift, _src_width)       \
 299 {                                                                       \
 300         .enable_reg     = (void __iomem *)_reg,                         \
 301         .enable_bit     = 0, /* unused */                               \
 302         .flags          = _flags | CLK_MASK_DIV_ON_DISABLE,             \
 303         .div_mask       = SH_CLK_DIV6_MSK,                              \
 304         .parent_table   = _parents,                                     \
 305         .parent_num     = _num_parents,                                 \
 306         .src_shift      = _src_shift,                                   \
 307         .src_width      = _src_width,                                   \
 308         .mapping        = &cpg_mapping,                                 \
 309 }
 310
 311 static struct clk div6_clks[DIV6_NR] = {
 312         [DIV6_ZB] = SH_CLK_MAP_DIV6_EXT(ZBCKCR, CLK_ENABLE_ON_INIT,
 313                                 div6_parents, 2, 7, 1),
 314         [DIV6_SDHI0] = SH_CLK_MAP_DIV6_EXT(SD0CKCR, 0,
 315                                 div6_parents, 2, 6, 2),
 316         [DIV6_SDHI1] = SH_CLK_MAP_DIV6_EXT(SD1CKCR, 0,
 317                                 div6_parents, 2, 6, 2),
 318         [DIV6_SDHI2] = SH_CLK_MAP_DIV6_EXT(SD2CKCR, 0,
 319                                 div6_parents, 2, 6, 2),
 320         [DIV6_MMC0] = SH_CLK_MAP_DIV6_EXT(MMC0CKCR, 0,
 321                                 div6_parents, 2, 6, 2),
 322         [DIV6_MMC1] = SH_CLK_MAP_DIV6_EXT(MMC1CKCR, 0,
 323                                 div6_parents, 2, 6, 2),
 324         [DIV6_VCK1] = SH_CLK_MAP_DIV6_EXT(VCLKCR1, 0, /* didn't care bit[6-7] */
 325                                 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
 326         [DIV6_VCK2] = SH_CLK_MAP_DIV6_EXT(VCLKCR2, 0, /* didn't care bit[6-7] */
 327                                 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
 328         [DIV6_VCK3] = SH_CLK_MAP_DIV6_EXT(VCLKCR3, 0, /* didn't care bit[6-7] */
 329                                 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
 330         [DIV6_VCK4] = SH_CLK_MAP_DIV6_EXT(VCLKCR4, 0, /* didn't care bit[6-7] */
 331                                 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
 332         [DIV6_VCK5] = SH_CLK_MAP_DIV6_EXT(VCLKCR5, 0, /* didn't care bit[6-7] */
 333                                 div6_parents, ARRAY_SIZE(div6_parents), 12, 3),
 334         [DIV6_FSIA] = SH_CLK_MAP_DIV6_EXT(FSIACKCR, 0,
 335                                 fsia_parents, ARRAY_SIZE(fsia_parents), 6, 2),
 336         [DIV6_FSIB] = SH_CLK_MAP_DIV6_EXT(FSIBCKCR, 0,
 337                                 fsib_parents, ARRAY_SIZE(fsib_parents), 6, 2),
 338         [DIV6_MP] = SH_CLK_MAP_DIV6_EXT(MPCKCR, 0, /* it needs bit[9-11] control */
 339                                 mp_parents, ARRAY_SIZE(mp_parents), 6, 2),
 340         /* pll2s will be selected always for M4 */
 341         [DIV6_M4] = SH_CLK_MAP_DIV6_EXT(M4CKCR, 0, /* it needs bit[9] control */
 342                                 m4_parents, ARRAY_SIZE(m4_parents), 6, 1),
 343         [DIV6_HSI] = SH_CLK_MAP_DIV6_EXT(HSICKCR, 0, /* it needs bit[9] control */
 344                                 hsi_parents, ARRAY_SIZE(hsi_parents), 6, 2),
 345         [DIV6_SPUV] = SH_CLK_MAP_DIV6_EXT(SPUVCKCR, 0,
 346                                 mp_parents, ARRAY_SIZE(mp_parents), 6, 2),
 347 };
 348
 349 /* MSTP */
 350 enum {
 351         MSTP217, MSTP216, MSTP207, MSTP206, MSTP204, MSTP203,
 352         MSTP315, MSTP314, MSTP313, MSTP312, MSTP305,
 353         MSTP522,
 354         MSTP_NR
 355 };
 356
 357 static struct clk mstp_clks[MSTP_NR] = {
 358         [MSTP204] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 4, 0), /* SCIFA0 */
 359         [MSTP203] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 3, 0), /* SCIFA1 */
 360         [MSTP206] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 6, 0), /* SCIFB0 */
 361         [MSTP207] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 7, 0), /* SCIFB1 */
 362         [MSTP216] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 16, 0), /* SCIFB2 */
 363         [MSTP217] = SH_CLK_MSTP32(&div6_clks[DIV6_MP],  SMSTPCR2, 17, 0), /* SCIFB3 */
 364         [MSTP305] = SH_CLK_MSTP32(&div6_clks[DIV6_MMC1],SMSTPCR3, 5, 0), /* MMCIF1 */
 365         [MSTP312] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI2],SMSTPCR3, 12, 0), /* SDHI2 */
 366         [MSTP313] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI1],SMSTPCR3, 13, 0), /* SDHI1 */
 367         [MSTP314] = SH_CLK_MSTP32(&div6_clks[DIV6_SDHI0],SMSTPCR3, 14, 0), /* SDHI0 */
 368         [MSTP315] = SH_CLK_MSTP32(&div6_clks[DIV6_MMC0],SMSTPCR3, 15, 0), /* MMCIF0 */
 369         [MSTP522] = SH_CLK_MSTP32(&extal2_clk, SMSTPCR5, 22, 0), /* Thermal */
 370 };
 371
 372 static struct clk_lookup lookups[] = {
 373         /* main clock */
 374         CLKDEV_CON_ID("extal1",                 &extal1_clk),
 375         CLKDEV_CON_ID("extal1_div2",            &extal1_div2_clk),
 376         CLKDEV_CON_ID("extal2",                 &extal2_clk),
 377         CLKDEV_CON_ID("extal2_div2",            &extal2_div2_clk),
 378         CLKDEV_CON_ID("extal2_div4",            &extal2_div4_clk),
 379         CLKDEV_CON_ID("fsiack",                 &fsiack_clk),
 380         CLKDEV_CON_ID("fsibck",                 &fsibck_clk),
 381
 382         /* pll clock */
 383         CLKDEV_CON_ID("pll1",                   &pll1_clk),
 384         CLKDEV_CON_ID("pll1_div2",              &pll1_div2_clk),
 385         CLKDEV_CON_ID("pll2",                   &pll2_clk),
 386         CLKDEV_CON_ID("pll2s",                  &pll2s_clk),
 387         CLKDEV_CON_ID("pll2h",                  &pll2h_clk),
 388
 389         /* DIV6 */
 390         CLKDEV_CON_ID("zb",                     &div6_clks[DIV6_ZB]),
 391         CLKDEV_CON_ID("vck1",                   &div6_clks[DIV6_VCK1]),
 392         CLKDEV_CON_ID("vck2",                   &div6_clks[DIV6_VCK2]),
 393         CLKDEV_CON_ID("vck3",                   &div6_clks[DIV6_VCK3]),
 394         CLKDEV_CON_ID("vck4",                   &div6_clks[DIV6_VCK4]),
 395         CLKDEV_CON_ID("vck5",                   &div6_clks[DIV6_VCK5]),
 396         CLKDEV_CON_ID("fsia",                   &div6_clks[DIV6_FSIA]),
 397         CLKDEV_CON_ID("fsib",                   &div6_clks[DIV6_FSIB]),
 398         CLKDEV_CON_ID("mp",                     &div6_clks[DIV6_MP]),
 399         CLKDEV_CON_ID("m4",                     &div6_clks[DIV6_M4]),
 400         CLKDEV_CON_ID("hsi",                    &div6_clks[DIV6_HSI]),
 401         CLKDEV_CON_ID("spuv",                   &div6_clks[DIV6_SPUV]),
 402
 403         /* MSTP */
 404         CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]),
 405         CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]),
 406         CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP206]),
 407         CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP207]),
 408         CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP216]),
 409         CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP217]),
 410         CLKDEV_DEV_ID("rcar_thermal", &mstp_clks[MSTP522]),
 411         CLKDEV_DEV_ID("sh_mmcif.1", &mstp_clks[MSTP305]),
 412         CLKDEV_DEV_ID("ee220000.mmcif", &mstp_clks[MSTP305]),
 413         CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP312]),
 414         CLKDEV_DEV_ID("ee140000.sdhi", &mstp_clks[MSTP312]),
 415         CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP313]),
 416         CLKDEV_DEV_ID("ee120000.sdhi", &mstp_clks[MSTP313]),
 417         CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP314]),
 418         CLKDEV_DEV_ID("ee100000.sdhi", &mstp_clks[MSTP314]),
 419         CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP315]),
 420         CLKDEV_DEV_ID("ee200000.mmcif", &mstp_clks[MSTP315]),
 421
 422         /* for DT */
 423         CLKDEV_DEV_ID("e61f0000.thermal", &mstp_clks[MSTP522]),
 424 };
 425
 426 void __init r8a73a4_clock_init(void)
 427 {
 428         void __iomem *reg;
 429         int k, ret = 0;
 430         u32 ckscr;
 431
 432         reg = ioremap_nocache(CKSCR, PAGE_SIZE);
 433         BUG_ON(!reg);
 434         ckscr = ioread32(reg);
 435         iounmap(reg);
 436
 437         switch ((ckscr >> 28) & 0x3) {
 438         case 0:
 439                 main_clk.parent = &extal1_clk;
 440                 break;
 441         case 1:
 442                 main_clk.parent = &extal1_div2_clk;
 443                 break;
 444         case 2:
 445                 main_clk.parent = &extal2_clk;
 446                 break;
 447         case 3:
 448                 main_clk.parent = &extal2_div2_clk;
 449                 break;
 450         }
 451
 452         for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
 453                 ret = clk_register(main_clks[k]);
 454
 455         if (!ret)
 456                 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
 457
 458         if (!ret)
 459                 ret = sh_clk_div6_reparent_register(div6_clks, DIV6_NR);
 460
 461         if (!ret)
 462                 ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
 463
 464         clkdev_add_table(lookups, ARRAY_SIZE(lookups));
 465
 466         if (!ret)
 467                 shmobile_clk_init();
 468         else
 469                 panic("failed to setup r8a73a4 clocks\n");
 470 }