1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Nuvoton NPCM7xx Clock Generator 4 * All the clocks are initialized by the bootloader, so this driver allow only 5 * reading of current settings directly from the hardware. 6 * 7 * Copyright (C) 2018 Nuvoton Technologies tali.perry@nuvoton.com 8 */ 9 10 #include <linux/module.h> 11 #include <linux/clk-provider.h> 12 #include <linux/io.h> 13 #include <linux/kernel.h> 14 #include <linux/of.h> 15 #include <linux/of_address.h> 16 #include <linux/slab.h> 17 #include <linux/err.h> 18 #include <linux/bitfield.h> 19 20 #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h> 21 22 struct npcm7xx_clk_pll { 23 struct clk_hw hw; 24 void __iomem *pllcon; 25 u8 flags; 26 }; 27 28 #define to_npcm7xx_clk_pll(_hw) container_of(_hw, struct npcm7xx_clk_pll, hw) 29 30 #define PLLCON_LOKI BIT(31) 31 #define PLLCON_LOKS BIT(30) 32 #define PLLCON_FBDV GENMASK(27, 16) 33 #define PLLCON_OTDV2 GENMASK(15, 13) 34 #define PLLCON_PWDEN BIT(12) 35 #define PLLCON_OTDV1 GENMASK(10, 8) 36 #define PLLCON_INDV GENMASK(5, 0) 37 38 static unsigned long npcm7xx_clk_pll_recalc_rate(struct clk_hw *hw, 39 unsigned long parent_rate) 40 { 41 struct npcm7xx_clk_pll *pll = to_npcm7xx_clk_pll(hw); 42 unsigned long fbdv, indv, otdv1, otdv2; 43 unsigned int val; 44 u64 ret; 45 46 if (parent_rate == 0) { 47 pr_err("%s: parent rate is zero", __func__); 48 return 0; 49 } 50 51 val = readl_relaxed(pll->pllcon); 52 53 indv = FIELD_GET(PLLCON_INDV, val); 54 fbdv = FIELD_GET(PLLCON_FBDV, val); 55 otdv1 = FIELD_GET(PLLCON_OTDV1, val); 56 otdv2 = FIELD_GET(PLLCON_OTDV2, val); 57 58 ret = (u64)parent_rate * fbdv; 59 do_div(ret, indv * otdv1 * otdv2); 60 61 return ret; 62 } 63 64 static const struct clk_ops npcm7xx_clk_pll_ops = { 65 .recalc_rate = npcm7xx_clk_pll_recalc_rate, 66 }; 67 68 static struct clk_hw * 69 npcm7xx_clk_register_pll(void __iomem *pllcon, const char *name, 70 const char *parent_name, unsigned long flags) 71 { 72 struct npcm7xx_clk_pll *pll; 73 struct clk_init_data init; 74 struct clk_hw *hw; 75 int ret; 76 77 pll = kzalloc(sizeof(*pll), GFP_KERNEL); 78 if (!pll) 79 return ERR_PTR(-ENOMEM); 80 81 pr_debug("%s reg, name=%s, p=%s\n", __func__, name, parent_name); 82 83 init.name = name; 84 init.ops = &npcm7xx_clk_pll_ops; 85 init.parent_names = &parent_name; 86 init.num_parents = 1; 87 init.flags = flags; 88 89 pll->pllcon = pllcon; 90 pll->hw.init = &init; 91 92 hw = &pll->hw; 93 94 ret = clk_hw_register(NULL, hw); 95 if (ret) { 96 kfree(pll); 97 hw = ERR_PTR(ret); 98 } 99 100 return hw; 101 } 102 103 #define NPCM7XX_CLKEN1 (0x00) 104 #define NPCM7XX_CLKEN2 (0x28) 105 #define NPCM7XX_CLKEN3 (0x30) 106 #define NPCM7XX_CLKSEL (0x04) 107 #define NPCM7XX_CLKDIV1 (0x08) 108 #define NPCM7XX_CLKDIV2 (0x2C) 109 #define NPCM7XX_CLKDIV3 (0x58) 110 #define NPCM7XX_PLLCON0 (0x0C) 111 #define NPCM7XX_PLLCON1 (0x10) 112 #define NPCM7XX_PLLCON2 (0x54) 113 #define NPCM7XX_SWRSTR (0x14) 114 #define NPCM7XX_IRQWAKECON (0x18) 115 #define NPCM7XX_IRQWAKEFLAG (0x1C) 116 #define NPCM7XX_IPSRST1 (0x20) 117 #define NPCM7XX_IPSRST2 (0x24) 118 #define NPCM7XX_IPSRST3 (0x34) 119 #define NPCM7XX_WD0RCR (0x38) 120 #define NPCM7XX_WD1RCR (0x3C) 121 #define NPCM7XX_WD2RCR (0x40) 122 #define NPCM7XX_SWRSTC1 (0x44) 123 #define NPCM7XX_SWRSTC2 (0x48) 124 #define NPCM7XX_SWRSTC3 (0x4C) 125 #define NPCM7XX_SWRSTC4 (0x50) 126 #define NPCM7XX_CORSTC (0x5C) 127 #define NPCM7XX_PLLCONG (0x60) 128 #define NPCM7XX_AHBCKFI (0x64) 129 #define NPCM7XX_SECCNT (0x68) 130 #define NPCM7XX_CNTR25M (0x6C) 131 132 struct npcm7xx_clk_mux_data { 133 u8 shift; 134 u8 mask; 135 u32 *table; 136 const char *name; 137 const char * const *parent_names; 138 u8 num_parents; 139 unsigned long flags; 140 /* 141 * If this clock is exported via DT, set onecell_idx to constant 142 * defined in include/dt-bindings/clock/nuvoton, NPCM7XX-clock.h for 143 * this specific clock. Otherwise, set to -1. 144 */ 145 int onecell_idx; 146 147 }; 148 149 struct npcm7xx_clk_div_data { 150 u32 reg; 151 u8 shift; 152 u8 width; 153 const char *name; 154 const char *parent_name; 155 u8 clk_divider_flags; 156 unsigned long flags; 157 /* 158 * If this clock is exported via DT, set onecell_idx to constant 159 * defined in include/dt-bindings/clock/nuvoton, NPCM7XX-clock.h for 160 * this specific clock. Otherwise, set to -1. 161 */ 162 int onecell_idx; 163 }; 164 165 struct npcm7xx_clk_pll_data { 166 u32 reg; 167 const char *name; 168 const char *parent_name; 169 unsigned long flags; 170 /* 171 * If this clock is exported via DT, set onecell_idx to constant 172 * defined in include/dt-bindings/clock/nuvoton, NPCM7XX-clock.h for 173 * this specific clock. Otherwise, set to -1. 174 */ 175 int onecell_idx; 176 }; 177 178 /* 179 * Single copy of strings used to refer to clocks within this driver indexed by 180 * above enum. 181 */ 182 #define NPCM7XX_CLK_S_REFCLK "refclk" 183 #define NPCM7XX_CLK_S_SYSBYPCK "sysbypck" 184 #define NPCM7XX_CLK_S_MCBYPCK "mcbypck" 185 #define NPCM7XX_CLK_S_GFXBYPCK "gfxbypck" 186 #define NPCM7XX_CLK_S_PLL0 "pll0" 187 #define NPCM7XX_CLK_S_PLL1 "pll1" 188 #define NPCM7XX_CLK_S_PLL1_DIV2 "pll1_div2" 189 #define NPCM7XX_CLK_S_PLL2 "pll2" 190 #define NPCM7XX_CLK_S_PLL_GFX "pll_gfx" 191 #define NPCM7XX_CLK_S_PLL2_DIV2 "pll2_div2" 192 #define NPCM7XX_CLK_S_PIX_MUX "gfx_pixel" 193 #define NPCM7XX_CLK_S_GPRFSEL_MUX "gprfsel_mux" 194 #define NPCM7XX_CLK_S_MC_MUX "mc_phy" 195 #define NPCM7XX_CLK_S_CPU_MUX "cpu" /*AKA system clock.*/ 196 #define NPCM7XX_CLK_S_MC "mc" 197 #define NPCM7XX_CLK_S_AXI "axi" /*AKA CLK2*/ 198 #define NPCM7XX_CLK_S_AHB "ahb" /*AKA CLK4*/ 199 #define NPCM7XX_CLK_S_CLKOUT_MUX "clkout_mux" 200 #define NPCM7XX_CLK_S_UART_MUX "uart_mux" 201 #define NPCM7XX_CLK_S_TIM_MUX "timer_mux" 202 #define NPCM7XX_CLK_S_SD_MUX "sd_mux" 203 #define NPCM7XX_CLK_S_GFXM_MUX "gfxm_mux" 204 #define NPCM7XX_CLK_S_SU_MUX "serial_usb_mux" 205 #define NPCM7XX_CLK_S_DVC_MUX "dvc_mux" 206 #define NPCM7XX_CLK_S_GFX_MUX "gfx_mux" 207 #define NPCM7XX_CLK_S_GFX_PIXEL "gfx_pixel" 208 #define NPCM7XX_CLK_S_SPI0 "spi0" 209 #define NPCM7XX_CLK_S_SPI3 "spi3" 210 #define NPCM7XX_CLK_S_SPIX "spix" 211 #define NPCM7XX_CLK_S_APB1 "apb1" 212 #define NPCM7XX_CLK_S_APB2 "apb2" 213 #define NPCM7XX_CLK_S_APB3 "apb3" 214 #define NPCM7XX_CLK_S_APB4 "apb4" 215 #define NPCM7XX_CLK_S_APB5 "apb5" 216 #define NPCM7XX_CLK_S_TOCK "tock" 217 #define NPCM7XX_CLK_S_CLKOUT "clkout" 218 #define NPCM7XX_CLK_S_UART "uart" 219 #define NPCM7XX_CLK_S_TIMER "timer" 220 #define NPCM7XX_CLK_S_MMC "mmc" 221 #define NPCM7XX_CLK_S_SDHC "sdhc" 222 #define NPCM7XX_CLK_S_ADC "adc" 223 #define NPCM7XX_CLK_S_GFX "gfx0_gfx1_mem" 224 #define NPCM7XX_CLK_S_USBIF "serial_usbif" 225 #define NPCM7XX_CLK_S_USB_HOST "usb_host" 226 #define NPCM7XX_CLK_S_USB_BRIDGE "usb_bridge" 227 #define NPCM7XX_CLK_S_PCI "pci" 228 229 static u32 pll_mux_table[] = {0, 1, 2, 3}; 230 static const char * const pll_mux_parents[] __initconst = { 231 NPCM7XX_CLK_S_PLL0, 232 NPCM7XX_CLK_S_PLL1_DIV2, 233 NPCM7XX_CLK_S_REFCLK, 234 NPCM7XX_CLK_S_PLL2_DIV2, 235 }; 236 237 static u32 cpuck_mux_table[] = {0, 1, 2, 3}; 238 static const char * const cpuck_mux_parents[] __initconst = { 239 NPCM7XX_CLK_S_PLL0, 240 NPCM7XX_CLK_S_PLL1_DIV2, 241 NPCM7XX_CLK_S_REFCLK, 242 NPCM7XX_CLK_S_SYSBYPCK, 243 }; 244 245 static u32 pixcksel_mux_table[] = {0, 2}; 246 static const char * const pixcksel_mux_parents[] __initconst = { 247 NPCM7XX_CLK_S_PLL_GFX, 248 NPCM7XX_CLK_S_REFCLK, 249 }; 250 251 static u32 sucksel_mux_table[] = {2, 3}; 252 static const char * const sucksel_mux_parents[] __initconst = { 253 NPCM7XX_CLK_S_REFCLK, 254 NPCM7XX_CLK_S_PLL2_DIV2, 255 }; 256 257 static u32 mccksel_mux_table[] = {0, 2, 3}; 258 static const char * const mccksel_mux_parents[] __initconst = { 259 NPCM7XX_CLK_S_PLL1_DIV2, 260 NPCM7XX_CLK_S_REFCLK, 261 NPCM7XX_CLK_S_MCBYPCK, 262 }; 263 264 static u32 clkoutsel_mux_table[] = {0, 1, 2, 3, 4}; 265 static const char * const clkoutsel_mux_parents[] __initconst = { 266 NPCM7XX_CLK_S_PLL0, 267 NPCM7XX_CLK_S_PLL1_DIV2, 268 NPCM7XX_CLK_S_REFCLK, 269 NPCM7XX_CLK_S_PLL_GFX, // divided by 2 270 NPCM7XX_CLK_S_PLL2_DIV2, 271 }; 272 273 static u32 gfxmsel_mux_table[] = {2, 3}; 274 static const char * const gfxmsel_mux_parents[] __initconst = { 275 NPCM7XX_CLK_S_REFCLK, 276 NPCM7XX_CLK_S_PLL2_DIV2, 277 }; 278 279 static u32 dvcssel_mux_table[] = {2, 3}; 280 static const char * const dvcssel_mux_parents[] __initconst = { 281 NPCM7XX_CLK_S_REFCLK, 282 NPCM7XX_CLK_S_PLL2, 283 }; 284 285 static const struct npcm7xx_clk_pll_data npcm7xx_plls[] __initconst = { 286 {NPCM7XX_PLLCON0, NPCM7XX_CLK_S_PLL0, NPCM7XX_CLK_S_REFCLK, 0, -1}, 287 288 {NPCM7XX_PLLCON1, NPCM7XX_CLK_S_PLL1, 289 NPCM7XX_CLK_S_REFCLK, 0, -1}, 290 291 {NPCM7XX_PLLCON2, NPCM7XX_CLK_S_PLL2, 292 NPCM7XX_CLK_S_REFCLK, 0, -1}, 293 294 {NPCM7XX_PLLCONG, NPCM7XX_CLK_S_PLL_GFX, 295 NPCM7XX_CLK_S_REFCLK, 0, -1}, 296 }; 297 298 static const struct npcm7xx_clk_mux_data npcm7xx_muxes[] __initconst = { 299 {0, GENMASK(1, 0), cpuck_mux_table, NPCM7XX_CLK_S_CPU_MUX, 300 cpuck_mux_parents, ARRAY_SIZE(cpuck_mux_parents), CLK_IS_CRITICAL, 301 NPCM7XX_CLK_CPU}, 302 303 {4, GENMASK(1, 0), pixcksel_mux_table, NPCM7XX_CLK_S_PIX_MUX, 304 pixcksel_mux_parents, ARRAY_SIZE(pixcksel_mux_parents), 0, 305 NPCM7XX_CLK_GFX_PIXEL}, 306 307 {6, GENMASK(1, 0), pll_mux_table, NPCM7XX_CLK_S_SD_MUX, 308 pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, 309 310 {8, GENMASK(1, 0), pll_mux_table, NPCM7XX_CLK_S_UART_MUX, 311 pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, 312 313 {10, GENMASK(1, 0), sucksel_mux_table, NPCM7XX_CLK_S_SU_MUX, 314 sucksel_mux_parents, ARRAY_SIZE(sucksel_mux_parents), 0, -1}, 315 316 {12, GENMASK(1, 0), mccksel_mux_table, NPCM7XX_CLK_S_MC_MUX, 317 mccksel_mux_parents, ARRAY_SIZE(mccksel_mux_parents), 0, -1}, 318 319 {14, GENMASK(1, 0), pll_mux_table, NPCM7XX_CLK_S_TIM_MUX, 320 pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, 321 322 {16, GENMASK(1, 0), pll_mux_table, NPCM7XX_CLK_S_GFX_MUX, 323 pll_mux_parents, ARRAY_SIZE(pll_mux_parents), 0, -1}, 324 325 {18, GENMASK(2, 0), clkoutsel_mux_table, NPCM7XX_CLK_S_CLKOUT_MUX, 326 clkoutsel_mux_parents, ARRAY_SIZE(clkoutsel_mux_parents), 0, -1}, 327 328 {21, GENMASK(1, 0), gfxmsel_mux_table, NPCM7XX_CLK_S_GFXM_MUX, 329 gfxmsel_mux_parents, ARRAY_SIZE(gfxmsel_mux_parents), 0, -1}, 330 331 {23, GENMASK(1, 0), dvcssel_mux_table, NPCM7XX_CLK_S_DVC_MUX, 332 dvcssel_mux_parents, ARRAY_SIZE(dvcssel_mux_parents), 0, -1}, 333 }; 334 335 /* configurable dividers: */ 336 static const struct npcm7xx_clk_div_data npcm7xx_divs[] __initconst = { 337 {NPCM7XX_CLKDIV1, 28, 3, NPCM7XX_CLK_S_ADC, 338 NPCM7XX_CLK_S_TIMER, CLK_DIVIDER_POWER_OF_TWO, 0, NPCM7XX_CLK_ADC}, 339 /*30-28 ADCCKDIV*/ 340 {NPCM7XX_CLKDIV1, 26, 2, NPCM7XX_CLK_S_AHB, 341 NPCM7XX_CLK_S_AXI, 0, CLK_IS_CRITICAL, NPCM7XX_CLK_AHB}, 342 /*27-26 CLK4DIV*/ 343 {NPCM7XX_CLKDIV1, 21, 5, NPCM7XX_CLK_S_TIMER, 344 NPCM7XX_CLK_S_TIM_MUX, 0, 0, NPCM7XX_CLK_TIMER}, 345 /*25-21 TIMCKDIV*/ 346 {NPCM7XX_CLKDIV1, 16, 5, NPCM7XX_CLK_S_UART, 347 NPCM7XX_CLK_S_UART_MUX, 0, 0, NPCM7XX_CLK_UART}, 348 /*20-16 UARTDIV*/ 349 {NPCM7XX_CLKDIV1, 11, 5, NPCM7XX_CLK_S_MMC, 350 NPCM7XX_CLK_S_SD_MUX, 0, 0, NPCM7XX_CLK_MMC}, 351 /*15-11 MMCCKDIV*/ 352 {NPCM7XX_CLKDIV1, 6, 5, NPCM7XX_CLK_S_SPI3, 353 NPCM7XX_CLK_S_AHB, 0, 0, NPCM7XX_CLK_SPI3}, 354 /*10-6 AHB3CKDIV*/ 355 {NPCM7XX_CLKDIV1, 2, 4, NPCM7XX_CLK_S_PCI, 356 NPCM7XX_CLK_S_GFX_MUX, 0, 0, NPCM7XX_CLK_PCI}, 357 /*5-2 PCICKDIV*/ 358 {NPCM7XX_CLKDIV1, 0, 1, NPCM7XX_CLK_S_AXI, 359 NPCM7XX_CLK_S_CPU_MUX, CLK_DIVIDER_POWER_OF_TWO, CLK_IS_CRITICAL, 360 NPCM7XX_CLK_AXI},/*0 CLK2DIV*/ 361 362 {NPCM7XX_CLKDIV2, 30, 2, NPCM7XX_CLK_S_APB4, 363 NPCM7XX_CLK_S_AHB, CLK_DIVIDER_POWER_OF_TWO, 0, NPCM7XX_CLK_APB4}, 364 /*31-30 APB4CKDIV*/ 365 {NPCM7XX_CLKDIV2, 28, 2, NPCM7XX_CLK_S_APB3, 366 NPCM7XX_CLK_S_AHB, CLK_DIVIDER_POWER_OF_TWO, 0, NPCM7XX_CLK_APB3}, 367 /*29-28 APB3CKDIV*/ 368 {NPCM7XX_CLKDIV2, 26, 2, NPCM7XX_CLK_S_APB2, 369 NPCM7XX_CLK_S_AHB, CLK_DIVIDER_POWER_OF_TWO, 0, NPCM7XX_CLK_APB2}, 370 /*27-26 APB2CKDIV*/ 371 {NPCM7XX_CLKDIV2, 24, 2, NPCM7XX_CLK_S_APB1, 372 NPCM7XX_CLK_S_AHB, CLK_DIVIDER_POWER_OF_TWO, 0, NPCM7XX_CLK_APB1}, 373 /*25-24 APB1CKDIV*/ 374 {NPCM7XX_CLKDIV2, 22, 2, NPCM7XX_CLK_S_APB5, 375 NPCM7XX_CLK_S_AHB, CLK_DIVIDER_POWER_OF_TWO, 0, NPCM7XX_CLK_APB5}, 376 /*23-22 APB5CKDIV*/ 377 {NPCM7XX_CLKDIV2, 16, 5, NPCM7XX_CLK_S_CLKOUT, 378 NPCM7XX_CLK_S_CLKOUT_MUX, 0, 0, NPCM7XX_CLK_CLKOUT}, 379 /*20-16 CLKOUTDIV*/ 380 {NPCM7XX_CLKDIV2, 13, 3, NPCM7XX_CLK_S_GFX, 381 NPCM7XX_CLK_S_GFX_MUX, 0, 0, NPCM7XX_CLK_GFX}, 382 /*15-13 GFXCKDIV*/ 383 {NPCM7XX_CLKDIV2, 8, 5, NPCM7XX_CLK_S_USB_BRIDGE, 384 NPCM7XX_CLK_S_SU_MUX, 0, 0, NPCM7XX_CLK_SU}, 385 /*12-8 SUCKDIV*/ 386 {NPCM7XX_CLKDIV2, 4, 4, NPCM7XX_CLK_S_USB_HOST, 387 NPCM7XX_CLK_S_SU_MUX, 0, 0, NPCM7XX_CLK_SU48}, 388 /*7-4 SU48CKDIV*/ 389 {NPCM7XX_CLKDIV2, 0, 4, NPCM7XX_CLK_S_SDHC, 390 NPCM7XX_CLK_S_SD_MUX, 0, 0, NPCM7XX_CLK_SDHC} 391 ,/*3-0 SD1CKDIV*/ 392 393 {NPCM7XX_CLKDIV3, 6, 5, NPCM7XX_CLK_S_SPI0, 394 NPCM7XX_CLK_S_AHB, 0, 0, NPCM7XX_CLK_SPI0}, 395 /*10-6 SPI0CKDV*/ 396 {NPCM7XX_CLKDIV3, 1, 5, NPCM7XX_CLK_S_SPIX, 397 NPCM7XX_CLK_S_AHB, 0, 0, NPCM7XX_CLK_SPIX}, 398 /*5-1 SPIXCKDV*/ 399 400 }; 401 402 static DEFINE_SPINLOCK(npcm7xx_clk_lock); 403 404 static void __init npcm7xx_clk_init(struct device_node *clk_np) 405 { 406 struct clk_hw_onecell_data *npcm7xx_clk_data; 407 void __iomem *clk_base; 408 struct resource res; 409 struct clk_hw *hw; 410 int ret; 411 int i; 412 413 ret = of_address_to_resource(clk_np, 0, &res); 414 if (ret) { 415 pr_err("%pOFn: failed to get resource, ret %d\n", clk_np, 416 ret); 417 return; 418 } 419 420 clk_base = ioremap(res.start, resource_size(&res)); 421 if (!clk_base) 422 goto npcm7xx_init_error; 423 424 npcm7xx_clk_data = kzalloc(struct_size(npcm7xx_clk_data, hws, 425 NPCM7XX_NUM_CLOCKS), GFP_KERNEL); 426 if (!npcm7xx_clk_data) 427 goto npcm7xx_init_np_err; 428 429 npcm7xx_clk_data->num = NPCM7XX_NUM_CLOCKS; 430 431 for (i = 0; i < NPCM7XX_NUM_CLOCKS; i++) 432 npcm7xx_clk_data->hws[i] = ERR_PTR(-EPROBE_DEFER); 433 434 /* Register plls */ 435 for (i = 0; i < ARRAY_SIZE(npcm7xx_plls); i++) { 436 const struct npcm7xx_clk_pll_data *pll_data = &npcm7xx_plls[i]; 437 438 hw = npcm7xx_clk_register_pll(clk_base + pll_data->reg, 439 pll_data->name, pll_data->parent_name, pll_data->flags); 440 if (IS_ERR(hw)) { 441 pr_err("npcm7xx_clk: Can't register pll\n"); 442 goto npcm7xx_init_fail; 443 } 444 445 if (pll_data->onecell_idx >= 0) 446 npcm7xx_clk_data->hws[pll_data->onecell_idx] = hw; 447 } 448 449 /* Register fixed dividers */ 450 hw = clk_hw_register_fixed_factor(NULL, NPCM7XX_CLK_S_PLL1_DIV2, 451 NPCM7XX_CLK_S_PLL1, 0, 1, 2); 452 if (IS_ERR(hw)) { 453 pr_err("npcm7xx_clk: Can't register fixed div\n"); 454 goto npcm7xx_init_fail; 455 } 456 457 hw = clk_hw_register_fixed_factor(NULL, NPCM7XX_CLK_S_PLL2_DIV2, 458 NPCM7XX_CLK_S_PLL2, 0, 1, 2); 459 if (IS_ERR(hw)) { 460 pr_err("npcm7xx_clk: Can't register div2\n"); 461 goto npcm7xx_init_fail; 462 } 463 464 /* Register muxes */ 465 for (i = 0; i < ARRAY_SIZE(npcm7xx_muxes); i++) { 466 const struct npcm7xx_clk_mux_data *mux_data = &npcm7xx_muxes[i]; 467 468 hw = clk_hw_register_mux_table(NULL, 469 mux_data->name, 470 mux_data->parent_names, mux_data->num_parents, 471 mux_data->flags, clk_base + NPCM7XX_CLKSEL, 472 mux_data->shift, mux_data->mask, 0, 473 mux_data->table, &npcm7xx_clk_lock); 474 475 if (IS_ERR(hw)) { 476 pr_err("npcm7xx_clk: Can't register mux\n"); 477 goto npcm7xx_init_fail; 478 } 479 480 if (mux_data->onecell_idx >= 0) 481 npcm7xx_clk_data->hws[mux_data->onecell_idx] = hw; 482 } 483 484 /* Register clock dividers specified in npcm7xx_divs */ 485 for (i = 0; i < ARRAY_SIZE(npcm7xx_divs); i++) { 486 const struct npcm7xx_clk_div_data *div_data = &npcm7xx_divs[i]; 487 488 hw = clk_hw_register_divider(NULL, div_data->name, 489 div_data->parent_name, 490 div_data->flags, 491 clk_base + div_data->reg, 492 div_data->shift, div_data->width, 493 div_data->clk_divider_flags, &npcm7xx_clk_lock); 494 if (IS_ERR(hw)) { 495 pr_err("npcm7xx_clk: Can't register div table\n"); 496 goto npcm7xx_init_fail; 497 } 498 499 if (div_data->onecell_idx >= 0) 500 npcm7xx_clk_data->hws[div_data->onecell_idx] = hw; 501 } 502 503 ret = of_clk_add_hw_provider(clk_np, of_clk_hw_onecell_get, 504 npcm7xx_clk_data); 505 if (ret) 506 pr_err("failed to add DT provider: %d\n", ret); 507 508 of_node_put(clk_np); 509 510 return; 511 512 npcm7xx_init_fail: 513 kfree(npcm7xx_clk_data); 514 npcm7xx_init_np_err: 515 iounmap(clk_base); 516 npcm7xx_init_error: 517 of_node_put(clk_np); 518 } 519 CLK_OF_DECLARE(npcm7xx_clk_init, "nuvoton,npcm750-clk", npcm7xx_clk_init); 520