drivers/clk/clk-bm1880.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Bitmain BM1880 SoC clock driver
   4  *
   5  * Copyright (c) 2019 Linaro Ltd.
   6  * Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
   7  */
   8
   9 #include <linux/clk-provider.h>
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/of_address.h>
  13 #include <linux/of_device.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/slab.h>
  16
  17 #include <dt-bindings/clock/bm1880-clock.h>
  18
  19 #define BM1880_CLK_MPLL_CTL     0x00
  20 #define BM1880_CLK_SPLL_CTL     0x04
  21 #define BM1880_CLK_FPLL_CTL     0x08
  22 #define BM1880_CLK_DDRPLL_CTL   0x0c
  23
  24 #define BM1880_CLK_ENABLE0      0x00
  25 #define BM1880_CLK_ENABLE1      0x04
  26 #define BM1880_CLK_SELECT       0x20
  27 #define BM1880_CLK_DIV0         0x40
  28 #define BM1880_CLK_DIV1         0x44
  29 #define BM1880_CLK_DIV2         0x48
  30 #define BM1880_CLK_DIV3         0x4c
  31 #define BM1880_CLK_DIV4         0x50
  32 #define BM1880_CLK_DIV5         0x54
  33 #define BM1880_CLK_DIV6         0x58
  34 #define BM1880_CLK_DIV7         0x5c
  35 #define BM1880_CLK_DIV8         0x60
  36 #define BM1880_CLK_DIV9         0x64
  37 #define BM1880_CLK_DIV10        0x68
  38 #define BM1880_CLK_DIV11        0x6c
  39 #define BM1880_CLK_DIV12        0x70
  40 #define BM1880_CLK_DIV13        0x74
  41 #define BM1880_CLK_DIV14        0x78
  42 #define BM1880_CLK_DIV15        0x7c
  43 #define BM1880_CLK_DIV16        0x80
  44 #define BM1880_CLK_DIV17        0x84
  45 #define BM1880_CLK_DIV18        0x88
  46 #define BM1880_CLK_DIV19        0x8c
  47 #define BM1880_CLK_DIV20        0x90
  48 #define BM1880_CLK_DIV21        0x94
  49 #define BM1880_CLK_DIV22        0x98
  50 #define BM1880_CLK_DIV23        0x9c
  51 #define BM1880_CLK_DIV24        0xa0
  52 #define BM1880_CLK_DIV25        0xa4
  53 #define BM1880_CLK_DIV26        0xa8
  54 #define BM1880_CLK_DIV27        0xac
  55 #define BM1880_CLK_DIV28        0xb0
  56
  57 #define to_bm1880_pll_clk(_hw) container_of(_hw, struct bm1880_pll_hw_clock, hw)
  58 #define to_bm1880_div_clk(_hw) container_of(_hw, struct bm1880_div_hw_clock, hw)
  59
  60 static DEFINE_SPINLOCK(bm1880_clk_lock);
  61
  62 struct bm1880_clock_data {
  63         void __iomem *pll_base;
  64         void __iomem *sys_base;
  65         struct clk_hw_onecell_data hw_data;
  66 };
  67
  68 struct bm1880_gate_clock {
  69         unsigned int    id;
  70         const char      *name;
  71         const char      *parent;
  72         u32             gate_reg;
  73         s8              gate_shift;
  74         unsigned long   flags;
  75 };
  76
  77 struct bm1880_mux_clock {
  78         unsigned int    id;
  79         const char      *name;
  80         const char      * const *parents;
  81         s8              num_parents;
  82         u32             reg;
  83         s8              shift;
  84         unsigned long   flags;
  85 };
  86
  87 struct bm1880_div_clock {
  88         unsigned int    id;
  89         const char      *name;
  90         u32             reg;
  91         u8              shift;
  92         u8              width;
  93         u32             initval;
  94         const struct clk_div_table *table;
  95         unsigned long flags;
  96 };
  97
  98 struct bm1880_div_hw_clock {
  99         struct bm1880_div_clock div;
 100         void __iomem *base;
 101         spinlock_t *lock;
 102         struct clk_hw hw;
 103         struct clk_init_data init;
 104 };
 105
 106 struct bm1880_composite_clock {
 107         unsigned int    id;
 108         const char      *name;
 109         const char      *parent;
 110         const char      * const *parents;
 111         unsigned int    num_parents;
 112         unsigned long   flags;
 113
 114         u32             gate_reg;
 115         u32             mux_reg;
 116         u32             div_reg;
 117
 118         s8              gate_shift;
 119         s8              mux_shift;
 120         s8              div_shift;
 121         s8              div_width;
 122         s16             div_initval;
 123         const struct clk_div_table *table;
 124 };
 125
 126 struct bm1880_pll_clock {
 127         unsigned int    id;
 128         const char      *name;
 129         u32             reg;
 130         unsigned long   flags;
 131 };
 132
 133 struct bm1880_pll_hw_clock {
 134         struct bm1880_pll_clock pll;
 135         void __iomem *base;
 136         struct clk_hw hw;
 137         struct clk_init_data init;
 138 };
 139
 140 static const struct clk_ops bm1880_pll_ops;
 141 static const struct clk_ops bm1880_clk_div_ops;
 142
 143 #define GATE_DIV(_id, _name, _parent, _gate_reg, _gate_shift, _div_reg, \
 144                         _div_shift, _div_width, _div_initval, _table,   \
 145                         _flags) {                                       \
 146                 .id = _id,                                              \
 147                 .parent = _parent,                                      \
 148                 .name = _name,                                          \
 149                 .gate_reg = _gate_reg,                                  \
 150                 .gate_shift = _gate_shift,                              \
 151                 .div_reg = _div_reg,                                    \
 152                 .div_shift = _div_shift,                                \
 153                 .div_width = _div_width,                                \
 154                 .div_initval = _div_initval,                            \
 155                 .table = _table,                                        \
 156                 .mux_shift = -1,                                        \
 157                 .flags = _flags,                                        \
 158         }
 159
 160 #define GATE_MUX(_id, _name, _parents, _gate_reg, _gate_shift,          \
 161                         _mux_reg, _mux_shift, _flags) {                 \
 162                 .id = _id,                                              \
 163                 .parents = _parents,                                    \
 164                 .num_parents = ARRAY_SIZE(_parents),                    \
 165                 .name = _name,                                          \
 166                 .gate_reg = _gate_reg,                                  \
 167                 .gate_shift = _gate_shift,                              \
 168                 .div_shift = -1,                                        \
 169                 .mux_reg = _mux_reg,                                    \
 170                 .mux_shift = _mux_shift,                                \
 171                 .flags = _flags,                                        \
 172         }
 173
 174 #define CLK_PLL(_id, _name, _parent, _reg, _flags) {                    \
 175                 .pll.id = _id,                                          \
 176                 .pll.name = _name,                                      \
 177                 .pll.reg = _reg,                                        \
 178                 .hw.init = CLK_HW_INIT_PARENTS_DATA(_name, _parent,     \
 179                                                     &bm1880_pll_ops,    \
 180                                                     _flags),            \
 181         }
 182
 183 #define CLK_DIV(_id, _name, _parent, _reg, _shift, _width, _initval,    \
 184                                 _table, _flags) {                       \
 185                 .div.id = _id,                                          \
 186                 .div.name = _name,                                      \
 187                 .div.reg = _reg,                                        \
 188                 .div.shift = _shift,                                    \
 189                 .div.width = _width,                                    \
 190                 .div.initval = _initval,                                \
 191                 .div.table = _table,                                    \
 192                 .hw.init = CLK_HW_INIT_HW(_name, _parent,               \
 193                                           &bm1880_clk_div_ops,          \
 194                                           _flags),                      \
 195         }
 196
 197 static struct clk_parent_data bm1880_pll_parent[] = {
 198         { .fw_name = "osc", .name = "osc" },
 199 };
 200
 201 /*
 202  * All PLL clocks are marked as CRITICAL, hence they are very crucial
 203  * for the functioning of the SoC
 204  */
 205 static struct bm1880_pll_hw_clock bm1880_pll_clks[] = {
 206         CLK_PLL(BM1880_CLK_MPLL, "clk_mpll", bm1880_pll_parent,
 207                 BM1880_CLK_MPLL_CTL, 0),
 208         CLK_PLL(BM1880_CLK_SPLL, "clk_spll", bm1880_pll_parent,
 209                 BM1880_CLK_SPLL_CTL, 0),
 210         CLK_PLL(BM1880_CLK_FPLL, "clk_fpll", bm1880_pll_parent,
 211                 BM1880_CLK_FPLL_CTL, 0),
 212         CLK_PLL(BM1880_CLK_DDRPLL, "clk_ddrpll", bm1880_pll_parent,
 213                 BM1880_CLK_DDRPLL_CTL, 0),
 214 };
 215
 216 /*
 217  * Clocks marked as CRITICAL are needed for the proper functioning
 218  * of the SoC.
 219  */
 220 static const struct bm1880_gate_clock bm1880_gate_clks[] = {
 221         { BM1880_CLK_AHB_ROM, "clk_ahb_rom", "clk_mux_axi6",
 222           BM1880_CLK_ENABLE0, 2, 0 },
 223         { BM1880_CLK_AXI_SRAM, "clk_axi_sram", "clk_axi1",
 224           BM1880_CLK_ENABLE0, 3, 0 },
 225         /*
 226          * Since this clock is sourcing the DDR memory, let's mark it as
 227          * critical to avoid gating.
 228          */
 229         { BM1880_CLK_DDR_AXI, "clk_ddr_axi", "clk_mux_axi6",
 230           BM1880_CLK_ENABLE0, 4, CLK_IS_CRITICAL },
 231         { BM1880_CLK_APB_EFUSE, "clk_apb_efuse", "clk_mux_axi6",
 232           BM1880_CLK_ENABLE0, 6, 0 },
 233         { BM1880_CLK_AXI5_EMMC, "clk_axi5_emmc", "clk_axi5",
 234           BM1880_CLK_ENABLE0, 7, 0 },
 235         { BM1880_CLK_AXI5_SD, "clk_axi5_sd", "clk_axi5",
 236           BM1880_CLK_ENABLE0, 10, 0 },
 237         { BM1880_CLK_AXI4_ETH0, "clk_axi4_eth0", "clk_axi4",
 238           BM1880_CLK_ENABLE0, 14, 0 },
 239         { BM1880_CLK_AXI4_ETH1, "clk_axi4_eth1", "clk_axi4",
 240           BM1880_CLK_ENABLE0, 16, 0 },
 241         { BM1880_CLK_AXI1_GDMA, "clk_axi1_gdma", "clk_axi1",
 242           BM1880_CLK_ENABLE0, 17, 0 },
 243         /* Don't gate GPIO clocks as it is not owned by the GPIO driver */
 244         { BM1880_CLK_APB_GPIO, "clk_apb_gpio", "clk_mux_axi6",
 245           BM1880_CLK_ENABLE0, 18, CLK_IGNORE_UNUSED },
 246         { BM1880_CLK_APB_GPIO_INTR, "clk_apb_gpio_intr", "clk_mux_axi6",
 247           BM1880_CLK_ENABLE0, 19, CLK_IGNORE_UNUSED },
 248         { BM1880_CLK_AXI1_MINER, "clk_axi1_miner", "clk_axi1",
 249           BM1880_CLK_ENABLE0, 21, 0 },
 250         { BM1880_CLK_AHB_SF, "clk_ahb_sf", "clk_mux_axi6",
 251           BM1880_CLK_ENABLE0, 22, 0 },
 252         /*
 253          * Not sure which module this clock is sourcing but gating this clock
 254          * prevents the system from booting. So, let's mark it as critical.
 255          */
 256         { BM1880_CLK_SDMA_AXI, "clk_sdma_axi", "clk_axi5",
 257           BM1880_CLK_ENABLE0, 23, CLK_IS_CRITICAL },
 258         { BM1880_CLK_APB_I2C, "clk_apb_i2c", "clk_mux_axi6",
 259           BM1880_CLK_ENABLE0, 25, 0 },
 260         { BM1880_CLK_APB_WDT, "clk_apb_wdt", "clk_mux_axi6",
 261           BM1880_CLK_ENABLE0, 26, 0 },
 262         { BM1880_CLK_APB_JPEG, "clk_apb_jpeg", "clk_axi6",
 263           BM1880_CLK_ENABLE0, 27, 0 },
 264         { BM1880_CLK_AXI5_NF, "clk_axi5_nf", "clk_axi5",
 265           BM1880_CLK_ENABLE0, 29, 0 },
 266         { BM1880_CLK_APB_NF, "clk_apb_nf", "clk_axi6",
 267           BM1880_CLK_ENABLE0, 30, 0 },
 268         { BM1880_CLK_APB_PWM, "clk_apb_pwm", "clk_mux_axi6",
 269           BM1880_CLK_ENABLE1, 0, 0 },
 270         { BM1880_CLK_RV, "clk_rv", "clk_mux_rv",
 271           BM1880_CLK_ENABLE1, 1, 0 },
 272         { BM1880_CLK_APB_SPI, "clk_apb_spi", "clk_mux_axi6",
 273           BM1880_CLK_ENABLE1, 2, 0 },
 274         { BM1880_CLK_UART_500M, "clk_uart_500m", "clk_div_uart_500m",
 275           BM1880_CLK_ENABLE1, 4, 0 },
 276         { BM1880_CLK_APB_UART, "clk_apb_uart", "clk_axi6",
 277           BM1880_CLK_ENABLE1, 5, 0 },
 278         { BM1880_CLK_APB_I2S, "clk_apb_i2s", "clk_axi6",
 279           BM1880_CLK_ENABLE1, 6, 0 },
 280         { BM1880_CLK_AXI4_USB, "clk_axi4_usb", "clk_axi4",
 281           BM1880_CLK_ENABLE1, 7, 0 },
 282         { BM1880_CLK_APB_USB, "clk_apb_usb", "clk_axi6",
 283           BM1880_CLK_ENABLE1, 8, 0 },
 284         { BM1880_CLK_12M_USB, "clk_12m_usb", "clk_div_12m_usb",
 285           BM1880_CLK_ENABLE1, 11, 0 },
 286         { BM1880_CLK_APB_VIDEO, "clk_apb_video", "clk_axi6",
 287           BM1880_CLK_ENABLE1, 12, 0 },
 288         { BM1880_CLK_APB_VPP, "clk_apb_vpp", "clk_axi6",
 289           BM1880_CLK_ENABLE1, 15, 0 },
 290         { BM1880_CLK_AXI6, "clk_axi6", "clk_mux_axi6",
 291           BM1880_CLK_ENABLE1, 21, 0 },
 292 };
 293
 294 static const char * const clk_a53_parents[] = { "clk_spll", "clk_mpll" };
 295 static const char * const clk_rv_parents[] = { "clk_div_1_rv", "clk_div_0_rv" };
 296 static const char * const clk_axi1_parents[] = { "clk_div_1_axi1", "clk_div_0_axi1" };
 297 static const char * const clk_axi6_parents[] = { "clk_div_1_axi6", "clk_div_0_axi6" };
 298
 299 static const struct bm1880_mux_clock bm1880_mux_clks[] = {
 300         { BM1880_CLK_MUX_RV, "clk_mux_rv", clk_rv_parents, 2,
 301           BM1880_CLK_SELECT, 1, 0 },
 302         { BM1880_CLK_MUX_AXI6, "clk_mux_axi6", clk_axi6_parents, 2,
 303           BM1880_CLK_SELECT, 3, 0 },
 304 };
 305
 306 static const struct clk_div_table bm1880_div_table_0[] = {
 307         { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
 308         { 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
 309         { 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
 310         { 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
 311         { 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
 312         { 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
 313         { 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
 314         { 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
 315         { 0, 0 }
 316 };
 317
 318 static const struct clk_div_table bm1880_div_table_1[] = {
 319         { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
 320         { 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
 321         { 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
 322         { 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
 323         { 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
 324         { 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
 325         { 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
 326         { 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
 327         { 127, 128 }, { 0, 0 }
 328 };
 329
 330 static const struct clk_div_table bm1880_div_table_2[] = {
 331         { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
 332         { 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
 333         { 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
 334         { 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
 335         { 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
 336         { 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
 337         { 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
 338         { 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
 339         { 127, 128 }, { 255, 256 }, { 0, 0 }
 340 };
 341
 342 static const struct clk_div_table bm1880_div_table_3[] = {
 343         { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
 344         { 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
 345         { 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
 346         { 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
 347         { 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
 348         { 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
 349         { 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
 350         { 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
 351         { 127, 128 }, { 255, 256 }, { 511, 512 }, { 0, 0 }
 352 };
 353
 354 static const struct clk_div_table bm1880_div_table_4[] = {
 355         { 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
 356         { 4, 5 }, { 5, 6 }, { 6, 7 }, { 7, 8 },
 357         { 8, 9 }, { 9, 10 }, { 10, 11 }, { 11, 12 },
 358         { 12, 13 }, { 13, 14 }, { 14, 15 }, { 15, 16 },
 359         { 16, 17 }, { 17, 18 }, { 18, 19 }, { 19, 20 },
 360         { 20, 21 }, { 21, 22 }, { 22, 23 }, { 23, 24 },
 361         { 24, 25 }, { 25, 26 }, { 26, 27 }, { 27, 28 },
 362         { 28, 29 }, { 29, 30 }, { 30, 31 }, { 31, 32 },
 363         { 127, 128 }, { 255, 256 }, { 511, 512 }, { 65535, 65536 },
 364         { 0, 0 }
 365 };
 366
 367 /*
 368  * Clocks marked as CRITICAL are needed for the proper functioning
 369  * of the SoC.
 370  */
 371 static struct bm1880_div_hw_clock bm1880_div_clks[] = {
 372         CLK_DIV(BM1880_CLK_DIV_0_RV, "clk_div_0_rv", &bm1880_pll_clks[1].hw,
 373                 BM1880_CLK_DIV12, 16, 5, 1, bm1880_div_table_0, 0),
 374         CLK_DIV(BM1880_CLK_DIV_1_RV, "clk_div_1_rv", &bm1880_pll_clks[2].hw,
 375                 BM1880_CLK_DIV13, 16, 5, 1, bm1880_div_table_0, 0),
 376         CLK_DIV(BM1880_CLK_DIV_UART_500M, "clk_div_uart_500m", &bm1880_pll_clks[2].hw,
 377                 BM1880_CLK_DIV15, 16, 7, 3, bm1880_div_table_1, 0),
 378         CLK_DIV(BM1880_CLK_DIV_0_AXI1, "clk_div_0_axi1", &bm1880_pll_clks[0].hw,
 379                 BM1880_CLK_DIV21, 16, 5, 2, bm1880_div_table_0,
 380                 0),
 381         CLK_DIV(BM1880_CLK_DIV_1_AXI1, "clk_div_1_axi1", &bm1880_pll_clks[2].hw,
 382                 BM1880_CLK_DIV22, 16, 5, 3, bm1880_div_table_0,
 383                 0),
 384         CLK_DIV(BM1880_CLK_DIV_0_AXI6, "clk_div_0_axi6", &bm1880_pll_clks[2].hw,
 385                 BM1880_CLK_DIV27, 16, 5, 15, bm1880_div_table_0,
 386                 0),
 387         CLK_DIV(BM1880_CLK_DIV_1_AXI6, "clk_div_1_axi6", &bm1880_pll_clks[0].hw,
 388                 BM1880_CLK_DIV28, 16, 5, 11, bm1880_div_table_0,
 389                 0),
 390         CLK_DIV(BM1880_CLK_DIV_12M_USB, "clk_div_12m_usb", &bm1880_pll_clks[2].hw,
 391                 BM1880_CLK_DIV18, 16, 7, 125, bm1880_div_table_1, 0),
 392 };
 393
 394 /*
 395  * Clocks marked as CRITICAL are all needed for the proper functioning
 396  * of the SoC.
 397  */
 398 static struct bm1880_composite_clock bm1880_composite_clks[] = {
 399         /*
 400          * Since clk_a53 and clk_50m_a53 clocks are sourcing the CPU core,
 401          * let's mark them as critical to avoid gating.
 402          */
 403         GATE_MUX(BM1880_CLK_A53, "clk_a53", clk_a53_parents,
 404                  BM1880_CLK_ENABLE0, 0, BM1880_CLK_SELECT, 0,
 405                  CLK_IS_CRITICAL),
 406         GATE_DIV(BM1880_CLK_50M_A53, "clk_50m_a53", "clk_fpll",
 407                  BM1880_CLK_ENABLE0, 1, BM1880_CLK_DIV0, 16, 5, 30,
 408                  bm1880_div_table_0, CLK_IS_CRITICAL),
 409         GATE_DIV(BM1880_CLK_EFUSE, "clk_efuse", "clk_fpll",
 410                  BM1880_CLK_ENABLE0, 5, BM1880_CLK_DIV1, 16, 7, 60,
 411                  bm1880_div_table_1, 0),
 412         GATE_DIV(BM1880_CLK_EMMC, "clk_emmc", "clk_fpll",
 413                  BM1880_CLK_ENABLE0, 8, BM1880_CLK_DIV2, 16, 5, 15,
 414                  bm1880_div_table_0, 0),
 415         GATE_DIV(BM1880_CLK_100K_EMMC, "clk_100k_emmc", "clk_div_12m_usb",
 416                  BM1880_CLK_ENABLE0, 9, BM1880_CLK_DIV3, 16, 8, 120,
 417                  bm1880_div_table_2, 0),
 418         GATE_DIV(BM1880_CLK_SD, "clk_sd", "clk_fpll",
 419                  BM1880_CLK_ENABLE0, 11, BM1880_CLK_DIV4, 16, 5, 15,
 420                  bm1880_div_table_0, 0),
 421         GATE_DIV(BM1880_CLK_100K_SD, "clk_100k_sd", "clk_div_12m_usb",
 422                  BM1880_CLK_ENABLE0, 12, BM1880_CLK_DIV5, 16, 8, 120,
 423                  bm1880_div_table_2, 0),
 424         GATE_DIV(BM1880_CLK_500M_ETH0, "clk_500m_eth0", "clk_fpll",
 425                  BM1880_CLK_ENABLE0, 13, BM1880_CLK_DIV6, 16, 5, 3,
 426                  bm1880_div_table_0, 0),
 427         GATE_DIV(BM1880_CLK_500M_ETH1, "clk_500m_eth1", "clk_fpll",
 428                  BM1880_CLK_ENABLE0, 15, BM1880_CLK_DIV7, 16, 5, 3,
 429                  bm1880_div_table_0, 0),
 430         /* Don't gate GPIO clocks as it is not owned by the GPIO driver */
 431         GATE_DIV(BM1880_CLK_GPIO_DB, "clk_gpio_db", "clk_div_12m_usb",
 432                  BM1880_CLK_ENABLE0, 20, BM1880_CLK_DIV8, 16, 16, 120,
 433                  bm1880_div_table_4, CLK_IGNORE_UNUSED),
 434         GATE_DIV(BM1880_CLK_SDMA_AUD, "clk_sdma_aud", "clk_fpll",
 435                  BM1880_CLK_ENABLE0, 24, BM1880_CLK_DIV9, 16, 7, 61,
 436                  bm1880_div_table_1, 0),
 437         GATE_DIV(BM1880_CLK_JPEG_AXI, "clk_jpeg_axi", "clk_fpll",
 438                  BM1880_CLK_ENABLE0, 28, BM1880_CLK_DIV10, 16, 5, 4,
 439                  bm1880_div_table_0, 0),
 440         GATE_DIV(BM1880_CLK_NF, "clk_nf", "clk_fpll",
 441                  BM1880_CLK_ENABLE0, 31, BM1880_CLK_DIV11, 16, 5, 30,
 442                  bm1880_div_table_0, 0),
 443         GATE_DIV(BM1880_CLK_TPU_AXI, "clk_tpu_axi", "clk_spll",
 444                  BM1880_CLK_ENABLE1, 3, BM1880_CLK_DIV14, 16, 5, 1,
 445                  bm1880_div_table_0, 0),
 446         GATE_DIV(BM1880_CLK_125M_USB, "clk_125m_usb", "clk_fpll",
 447                  BM1880_CLK_ENABLE1, 9, BM1880_CLK_DIV16, 16, 5, 12,
 448                  bm1880_div_table_0, 0),
 449         GATE_DIV(BM1880_CLK_33K_USB, "clk_33k_usb", "clk_div_12m_usb",
 450                  BM1880_CLK_ENABLE1, 10, BM1880_CLK_DIV17, 16, 9, 363,
 451                  bm1880_div_table_3, 0),
 452         GATE_DIV(BM1880_CLK_VIDEO_AXI, "clk_video_axi", "clk_fpll",
 453                  BM1880_CLK_ENABLE1, 13, BM1880_CLK_DIV19, 16, 5, 4,
 454                  bm1880_div_table_0, 0),
 455         GATE_DIV(BM1880_CLK_VPP_AXI, "clk_vpp_axi", "clk_fpll",
 456                  BM1880_CLK_ENABLE1, 14, BM1880_CLK_DIV20, 16, 5, 4,
 457                  bm1880_div_table_0, 0),
 458         GATE_MUX(BM1880_CLK_AXI1, "clk_axi1", clk_axi1_parents,
 459                  BM1880_CLK_ENABLE1, 15, BM1880_CLK_SELECT, 2, 0),
 460         GATE_DIV(BM1880_CLK_AXI2, "clk_axi2", "clk_fpll",
 461                  BM1880_CLK_ENABLE1, 17, BM1880_CLK_DIV23, 16, 5, 3,
 462                  bm1880_div_table_0, 0),
 463         GATE_DIV(BM1880_CLK_AXI3, "clk_axi3", "clk_mux_rv",
 464                  BM1880_CLK_ENABLE1, 18, BM1880_CLK_DIV24, 16, 5, 2,
 465                  bm1880_div_table_0, 0),
 466         GATE_DIV(BM1880_CLK_AXI4, "clk_axi4", "clk_fpll",
 467                  BM1880_CLK_ENABLE1, 19, BM1880_CLK_DIV25, 16, 5, 6,
 468                  bm1880_div_table_0, 0),
 469         GATE_DIV(BM1880_CLK_AXI5, "clk_axi5", "clk_fpll",
 470                  BM1880_CLK_ENABLE1, 20, BM1880_CLK_DIV26, 16, 5, 15,
 471                  bm1880_div_table_0, 0),
 472 };
 473
 474 static unsigned long bm1880_pll_rate_calc(u32 regval, unsigned long parent_rate)
 475 {
 476         u64 numerator;
 477         u32 fbdiv, refdiv;
 478         u32 postdiv1, postdiv2, denominator;
 479
 480         fbdiv = (regval >> 16) & 0xfff;
 481         refdiv = regval & 0x1f;
 482         postdiv1 = (regval >> 8) & 0x7;
 483         postdiv2 = (regval >> 12) & 0x7;
 484
 485         numerator = parent_rate * fbdiv;
 486         denominator = refdiv * postdiv1 * postdiv2;
 487         do_div(numerator, denominator);
 488
 489         return (unsigned long)numerator;
 490 }
 491
 492 static unsigned long bm1880_pll_recalc_rate(struct clk_hw *hw,
 493                                             unsigned long parent_rate)
 494 {
 495         struct bm1880_pll_hw_clock *pll_hw = to_bm1880_pll_clk(hw);
 496         unsigned long rate;
 497         u32 regval;
 498
 499         regval = readl(pll_hw->base + pll_hw->pll.reg);
 500         rate = bm1880_pll_rate_calc(regval, parent_rate);
 501
 502         return rate;
 503 }
 504
 505 static const struct clk_ops bm1880_pll_ops = {
 506         .recalc_rate    = bm1880_pll_recalc_rate,
 507 };
 508
 509 static struct clk_hw *bm1880_clk_register_pll(struct bm1880_pll_hw_clock *pll_clk,
 510                                               void __iomem *sys_base)
 511 {
 512         struct clk_hw *hw;
 513         int err;
 514
 515         pll_clk->base = sys_base;
 516         hw = &pll_clk->hw;
 517
 518         err = clk_hw_register(NULL, hw);
 519         if (err)
 520                 return ERR_PTR(err);
 521
 522         return hw;
 523 }
 524
 525 static int bm1880_clk_register_plls(struct bm1880_pll_hw_clock *clks,
 526                                     int num_clks,
 527                                     struct bm1880_clock_data *data)
 528 {
 529         struct clk_hw *hw;
 530         void __iomem *pll_base = data->pll_base;
 531         int i;
 532
 533         for (i = 0; i < num_clks; i++) {
 534                 struct bm1880_pll_hw_clock *bm1880_clk = &clks[i];
 535
 536                 hw = bm1880_clk_register_pll(bm1880_clk, pll_base);
 537                 if (IS_ERR(hw)) {
 538                         pr_err("%s: failed to register clock %s\n",
 539                                __func__, bm1880_clk->pll.name);
 540                         goto err_clk;
 541                 }
 542
 543                 data->hw_data.hws[clks[i].pll.id] = hw;
 544         }
 545
 546         return 0;
 547
 548 err_clk:
 549         while (i--)
 550                 clk_hw_unregister(data->hw_data.hws[clks[i].pll.id]);
 551
 552         return PTR_ERR(hw);
 553 }
 554
 555 static int bm1880_clk_register_mux(const struct bm1880_mux_clock *clks,
 556                                    int num_clks,
 557                                    struct bm1880_clock_data *data)
 558 {
 559         struct clk_hw *hw;
 560         void __iomem *sys_base = data->sys_base;
 561         int i;
 562
 563         for (i = 0; i < num_clks; i++) {
 564                 hw = clk_hw_register_mux(NULL, clks[i].name,
 565                                          clks[i].parents,
 566                                          clks[i].num_parents,
 567                                          clks[i].flags,
 568                                          sys_base + clks[i].reg,
 569                                          clks[i].shift, 1, 0,
 570                                          &bm1880_clk_lock);
 571                 if (IS_ERR(hw)) {
 572                         pr_err("%s: failed to register clock %s\n",
 573                                __func__, clks[i].name);
 574                         goto err_clk;
 575                 }
 576
 577                 data->hw_data.hws[clks[i].id] = hw;
 578         }
 579
 580         return 0;
 581
 582 err_clk:
 583         while (i--)
 584                 clk_hw_unregister_mux(data->hw_data.hws[clks[i].id]);
 585
 586         return PTR_ERR(hw);
 587 }
 588
 589 static unsigned long bm1880_clk_div_recalc_rate(struct clk_hw *hw,
 590                                                 unsigned long parent_rate)
 591 {
 592         struct bm1880_div_hw_clock *div_hw = to_bm1880_div_clk(hw);
 593         struct bm1880_div_clock *div = &div_hw->div;
 594         void __iomem *reg_addr = div_hw->base + div->reg;
 595         unsigned int val;
 596         unsigned long rate;
 597
 598         if (!(readl(reg_addr) & BIT(3))) {
 599                 val = div->initval;
 600         } else {
 601                 val = readl(reg_addr) >> div->shift;
 602                 val &= clk_div_mask(div->width);
 603         }
 604
 605         rate = divider_recalc_rate(hw, parent_rate, val, div->table,
 606                                    div->flags, div->width);
 607
 608         return rate;
 609 }
 610
 611 static long bm1880_clk_div_round_rate(struct clk_hw *hw, unsigned long rate,
 612                                       unsigned long *prate)
 613 {
 614         struct bm1880_div_hw_clock *div_hw = to_bm1880_div_clk(hw);
 615         struct bm1880_div_clock *div = &div_hw->div;
 616         void __iomem *reg_addr = div_hw->base + div->reg;
 617
 618         if (div->flags & CLK_DIVIDER_READ_ONLY) {
 619                 u32 val;
 620
 621                 val = readl(reg_addr) >> div->shift;
 622                 val &= clk_div_mask(div->width);
 623
 624                 return divider_ro_round_rate(hw, rate, prate, div->table,
 625                                              div->width, div->flags,
 626                                              val);
 627         }
 628
 629         return divider_round_rate(hw, rate, prate, div->table,
 630                                   div->width, div->flags);
 631 }
 632
 633 static int bm1880_clk_div_set_rate(struct clk_hw *hw, unsigned long rate,
 634                                    unsigned long parent_rate)
 635 {
 636         struct bm1880_div_hw_clock *div_hw = to_bm1880_div_clk(hw);
 637         struct bm1880_div_clock *div = &div_hw->div;
 638         void __iomem *reg_addr = div_hw->base + div->reg;
 639         unsigned long flags = 0;
 640         int value;
 641         u32 val;
 642
 643         value = divider_get_val(rate, parent_rate, div->table,
 644                                 div->width, div_hw->div.flags);
 645         if (value < 0)
 646                 return value;
 647
 648         if (div_hw->lock)
 649                 spin_lock_irqsave(div_hw->lock, flags);
 650         else
 651                 __acquire(div_hw->lock);
 652
 653         val = readl(reg_addr);
 654         val &= ~(clk_div_mask(div->width) << div_hw->div.shift);
 655         val |= (u32)value << div->shift;
 656         writel(val, reg_addr);
 657
 658         if (div_hw->lock)
 659                 spin_unlock_irqrestore(div_hw->lock, flags);
 660         else
 661                 __release(div_hw->lock);
 662
 663         return 0;
 664 }
 665
 666 static const struct clk_ops bm1880_clk_div_ops = {
 667         .recalc_rate = bm1880_clk_div_recalc_rate,
 668         .round_rate = bm1880_clk_div_round_rate,
 669         .set_rate = bm1880_clk_div_set_rate,
 670 };
 671
 672 static struct clk_hw *bm1880_clk_register_div(struct bm1880_div_hw_clock *div_clk,
 673                                               void __iomem *sys_base)
 674 {
 675         struct clk_hw *hw;
 676         int err;
 677
 678         div_clk->div.flags = CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO;
 679         div_clk->base = sys_base;
 680         div_clk->lock = &bm1880_clk_lock;
 681
 682         hw = &div_clk->hw;
 683         err = clk_hw_register(NULL, hw);
 684         if (err)
 685                 return ERR_PTR(err);
 686
 687         return hw;
 688 }
 689
 690 static int bm1880_clk_register_divs(struct bm1880_div_hw_clock *clks,
 691                                     int num_clks,
 692                                     struct bm1880_clock_data *data)
 693 {
 694         struct clk_hw *hw;
 695         void __iomem *sys_base = data->sys_base;
 696         unsigned int i, id;
 697
 698         for (i = 0; i < num_clks; i++) {
 699                 struct bm1880_div_hw_clock *bm1880_clk = &clks[i];
 700
 701                 hw = bm1880_clk_register_div(bm1880_clk, sys_base);
 702                 if (IS_ERR(hw)) {
 703                         pr_err("%s: failed to register clock %s\n",
 704                                __func__, bm1880_clk->div.name);
 705                         goto err_clk;
 706                 }
 707
 708                 id = clks[i].div.id;
 709                 data->hw_data.hws[id] = hw;
 710         }
 711
 712         return 0;
 713
 714 err_clk:
 715         while (i--)
 716                 clk_hw_unregister(data->hw_data.hws[clks[i].div.id]);
 717
 718         return PTR_ERR(hw);
 719 }
 720
 721 static int bm1880_clk_register_gate(const struct bm1880_gate_clock *clks,
 722                                     int num_clks,
 723                                     struct bm1880_clock_data *data)
 724 {
 725         struct clk_hw *hw;
 726         void __iomem *sys_base = data->sys_base;
 727         int i;
 728
 729         for (i = 0; i < num_clks; i++) {
 730                 hw = clk_hw_register_gate(NULL, clks[i].name,
 731                                           clks[i].parent,
 732                                           clks[i].flags,
 733                                           sys_base + clks[i].gate_reg,
 734                                           clks[i].gate_shift, 0,
 735                                           &bm1880_clk_lock);
 736                 if (IS_ERR(hw)) {
 737                         pr_err("%s: failed to register clock %s\n",
 738                                __func__, clks[i].name);
 739                         goto err_clk;
 740                 }
 741
 742                 data->hw_data.hws[clks[i].id] = hw;
 743         }
 744
 745         return 0;
 746
 747 err_clk:
 748         while (i--)
 749                 clk_hw_unregister_gate(data->hw_data.hws[clks[i].id]);
 750
 751         return PTR_ERR(hw);
 752 }
 753
 754 static struct clk_hw *bm1880_clk_register_composite(struct bm1880_composite_clock *clks,
 755                                                     void __iomem *sys_base)
 756 {
 757         struct clk_hw *hw;
 758         struct clk_mux *mux = NULL;
 759         struct clk_gate *gate = NULL;
 760         struct bm1880_div_hw_clock *div_hws = NULL;
 761         struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
 762         const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
 763         const char * const *parent_names;
 764         const char *parent;
 765         int num_parents;
 766         int ret;
 767
 768         if (clks->mux_shift >= 0) {
 769                 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
 770                 if (!mux)
 771                         return ERR_PTR(-ENOMEM);
 772
 773                 mux->reg = sys_base + clks->mux_reg;
 774                 mux->mask = 1;
 775                 mux->shift = clks->mux_shift;
 776                 mux_hw = &mux->hw;
 777                 mux_ops = &clk_mux_ops;
 778                 mux->lock = &bm1880_clk_lock;
 779
 780                 parent_names = clks->parents;
 781                 num_parents = clks->num_parents;
 782         } else {
 783                 parent = clks->parent;
 784                 parent_names = &parent;
 785                 num_parents = 1;
 786         }
 787
 788         if (clks->gate_shift >= 0) {
 789                 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
 790                 if (!gate) {
 791                         ret = -ENOMEM;
 792                         goto err_out;
 793                 }
 794
 795                 gate->reg = sys_base + clks->gate_reg;
 796                 gate->bit_idx = clks->gate_shift;
 797                 gate->lock = &bm1880_clk_lock;
 798
 799                 gate_hw = &gate->hw;
 800                 gate_ops = &clk_gate_ops;
 801         }
 802
 803         if (clks->div_shift >= 0) {
 804                 div_hws = kzalloc(sizeof(*div_hws), GFP_KERNEL);
 805                 if (!div_hws) {
 806                         ret = -ENOMEM;
 807                         goto err_out;
 808                 }
 809
 810                 div_hws->base = sys_base;
 811                 div_hws->div.reg = clks->div_reg;
 812                 div_hws->div.shift = clks->div_shift;
 813                 div_hws->div.width = clks->div_width;
 814                 div_hws->div.table = clks->table;
 815                 div_hws->div.initval = clks->div_initval;
 816                 div_hws->lock = &bm1880_clk_lock;
 817                 div_hws->div.flags = CLK_DIVIDER_ONE_BASED |
 818                                      CLK_DIVIDER_ALLOW_ZERO;
 819
 820                 div_hw = &div_hws->hw;
 821                 div_ops = &bm1880_clk_div_ops;
 822         }
 823
 824         hw = clk_hw_register_composite(NULL, clks->name, parent_names,
 825                                        num_parents, mux_hw, mux_ops, div_hw,
 826                                        div_ops, gate_hw, gate_ops,
 827                                        clks->flags);
 828
 829         if (IS_ERR(hw)) {
 830                 ret = PTR_ERR(hw);
 831                 goto err_out;
 832         }
 833
 834         return hw;
 835
 836 err_out:
 837         kfree(div_hws);
 838         kfree(gate);
 839         kfree(mux);
 840
 841         return ERR_PTR(ret);
 842 }
 843
 844 static int bm1880_clk_register_composites(struct bm1880_composite_clock *clks,
 845                                           int num_clks,
 846                                           struct bm1880_clock_data *data)
 847 {
 848         struct clk_hw *hw;
 849         void __iomem *sys_base = data->sys_base;
 850         int i;
 851
 852         for (i = 0; i < num_clks; i++) {
 853                 struct bm1880_composite_clock *bm1880_clk = &clks[i];
 854
 855                 hw = bm1880_clk_register_composite(bm1880_clk, sys_base);
 856                 if (IS_ERR(hw)) {
 857                         pr_err("%s: failed to register clock %s\n",
 858                                __func__, bm1880_clk->name);
 859                         goto err_clk;
 860                 }
 861
 862                 data->hw_data.hws[clks[i].id] = hw;
 863         }
 864
 865         return 0;
 866
 867 err_clk:
 868         while (i--)
 869                 clk_hw_unregister_composite(data->hw_data.hws[clks[i].id]);
 870
 871         return PTR_ERR(hw);
 872 }
 873
 874 static int bm1880_clk_probe(struct platform_device *pdev)
 875 {
 876         struct bm1880_clock_data *clk_data;
 877         void __iomem *pll_base, *sys_base;
 878         struct device *dev = &pdev->dev;
 879         struct resource *res;
 880         int num_clks, i;
 881
 882         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 883         pll_base = devm_ioremap_resource(&pdev->dev, res);
 884         if (IS_ERR(pll_base))
 885                 return PTR_ERR(pll_base);
 886
 887         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 888         sys_base = devm_ioremap_resource(&pdev->dev, res);
 889         if (IS_ERR(sys_base))
 890                 return PTR_ERR(sys_base);
 891
 892         num_clks = ARRAY_SIZE(bm1880_pll_clks) +
 893                    ARRAY_SIZE(bm1880_div_clks) +
 894                    ARRAY_SIZE(bm1880_mux_clks) +
 895                    ARRAY_SIZE(bm1880_composite_clks) +
 896                    ARRAY_SIZE(bm1880_gate_clks);
 897
 898         clk_data = devm_kzalloc(dev, struct_size(clk_data, hw_data.hws,
 899                                                  num_clks), GFP_KERNEL);
 900         if (!clk_data)
 901                 return -ENOMEM;
 902
 903         clk_data->pll_base = pll_base;
 904         clk_data->sys_base = sys_base;
 905
 906         for (i = 0; i < num_clks; i++)
 907                 clk_data->hw_data.hws[i] = ERR_PTR(-ENOENT);
 908
 909         clk_data->hw_data.num = num_clks;
 910
 911         bm1880_clk_register_plls(bm1880_pll_clks,
 912                                  ARRAY_SIZE(bm1880_pll_clks),
 913                                  clk_data);
 914
 915         bm1880_clk_register_divs(bm1880_div_clks,
 916                                  ARRAY_SIZE(bm1880_div_clks),
 917                                  clk_data);
 918
 919         bm1880_clk_register_mux(bm1880_mux_clks,
 920                                 ARRAY_SIZE(bm1880_mux_clks),
 921                                 clk_data);
 922
 923         bm1880_clk_register_composites(bm1880_composite_clks,
 924                                        ARRAY_SIZE(bm1880_composite_clks),
 925                                        clk_data);
 926
 927         bm1880_clk_register_gate(bm1880_gate_clks,
 928                                  ARRAY_SIZE(bm1880_gate_clks),
 929                                  clk_data);
 930
 931         return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
 932                                       &clk_data->hw_data);
 933 }
 934
 935 static const struct of_device_id bm1880_of_match[] = {
 936         { .compatible = "bitmain,bm1880-clk", },
 937         {}
 938 };
 939 MODULE_DEVICE_TABLE(of, bm1880_of_match);
 940
 941 static struct platform_driver bm1880_clk_driver = {
 942         .driver = {
 943                 .name = "bm1880-clk",
 944                 .of_match_table = bm1880_of_match,
 945         },
 946         .probe = bm1880_clk_probe,
 947 };
 948 module_platform_driver(bm1880_clk_driver);
 949
 950 MODULE_AUTHOR("Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>");
 951 MODULE_DESCRIPTION("Clock driver for Bitmain BM1880 SoC");