1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2014 Oleksij Rempel <linux@rempel-privat.de>. 4 */ 5 6 #include <linux/clk.h> 7 #include <linux/clkdev.h> 8 #include <linux/err.h> 9 #include <linux/io.h> 10 #include <linux/clk-provider.h> 11 #include <linux/spinlock.h> 12 #include <linux/of.h> 13 #include <linux/of_address.h> 14 #include <dt-bindings/clock/alphascale,asm9260.h> 15 16 #define HW_AHBCLKCTRL0 0x0020 17 #define HW_AHBCLKCTRL1 0x0030 18 #define HW_SYSPLLCTRL 0x0100 19 #define HW_MAINCLKSEL 0x0120 20 #define HW_MAINCLKUEN 0x0124 21 #define HW_UARTCLKSEL 0x0128 22 #define HW_UARTCLKUEN 0x012c 23 #define HW_I2S0CLKSEL 0x0130 24 #define HW_I2S0CLKUEN 0x0134 25 #define HW_I2S1CLKSEL 0x0138 26 #define HW_I2S1CLKUEN 0x013c 27 #define HW_WDTCLKSEL 0x0160 28 #define HW_WDTCLKUEN 0x0164 29 #define HW_CLKOUTCLKSEL 0x0170 30 #define HW_CLKOUTCLKUEN 0x0174 31 #define HW_CPUCLKDIV 0x017c 32 #define HW_SYSAHBCLKDIV 0x0180 33 #define HW_I2S0MCLKDIV 0x0190 34 #define HW_I2S0SCLKDIV 0x0194 35 #define HW_I2S1MCLKDIV 0x0188 36 #define HW_I2S1SCLKDIV 0x018c 37 #define HW_UART0CLKDIV 0x0198 38 #define HW_UART1CLKDIV 0x019c 39 #define HW_UART2CLKDIV 0x01a0 40 #define HW_UART3CLKDIV 0x01a4 41 #define HW_UART4CLKDIV 0x01a8 42 #define HW_UART5CLKDIV 0x01ac 43 #define HW_UART6CLKDIV 0x01b0 44 #define HW_UART7CLKDIV 0x01b4 45 #define HW_UART8CLKDIV 0x01b8 46 #define HW_UART9CLKDIV 0x01bc 47 #define HW_SPI0CLKDIV 0x01c0 48 #define HW_SPI1CLKDIV 0x01c4 49 #define HW_QUADSPICLKDIV 0x01c8 50 #define HW_SSP0CLKDIV 0x01d0 51 #define HW_NANDCLKDIV 0x01d4 52 #define HW_TRACECLKDIV 0x01e0 53 #define HW_CAMMCLKDIV 0x01e8 54 #define HW_WDTCLKDIV 0x01ec 55 #define HW_CLKOUTCLKDIV 0x01f4 56 #define HW_MACCLKDIV 0x01f8 57 #define HW_LCDCLKDIV 0x01fc 58 #define HW_ADCANACLKDIV 0x0200 59 60 static struct clk_hw_onecell_data *clk_data; 61 static DEFINE_SPINLOCK(asm9260_clk_lock); 62 63 struct asm9260_div_clk { 64 unsigned int idx; 65 const char *name; 66 const char *parent_name; 67 u32 reg; 68 }; 69 70 struct asm9260_gate_data { 71 unsigned int idx; 72 const char *name; 73 const char *parent_name; 74 u32 reg; 75 u8 bit_idx; 76 unsigned long flags; 77 }; 78 79 struct asm9260_mux_clock { 80 u8 mask; 81 u32 *table; 82 const char *name; 83 const char **parent_names; 84 u8 num_parents; 85 unsigned long offset; 86 unsigned long flags; 87 }; 88 89 static void __iomem *base; 90 91 static const struct asm9260_div_clk asm9260_div_clks[] __initconst = { 92 { CLKID_SYS_CPU, "cpu_div", "main_gate", HW_CPUCLKDIV }, 93 { CLKID_SYS_AHB, "ahb_div", "cpu_div", HW_SYSAHBCLKDIV }, 94 95 /* i2s has two deviders: one for only external mclk and internal 96 * devider for all clks. */ 97 { CLKID_SYS_I2S0M, "i2s0m_div", "i2s0_mclk", HW_I2S0MCLKDIV }, 98 { CLKID_SYS_I2S1M, "i2s1m_div", "i2s1_mclk", HW_I2S1MCLKDIV }, 99 { CLKID_SYS_I2S0S, "i2s0s_div", "i2s0_gate", HW_I2S0SCLKDIV }, 100 { CLKID_SYS_I2S1S, "i2s1s_div", "i2s0_gate", HW_I2S1SCLKDIV }, 101 102 { CLKID_SYS_UART0, "uart0_div", "uart_gate", HW_UART0CLKDIV }, 103 { CLKID_SYS_UART1, "uart1_div", "uart_gate", HW_UART1CLKDIV }, 104 { CLKID_SYS_UART2, "uart2_div", "uart_gate", HW_UART2CLKDIV }, 105 { CLKID_SYS_UART3, "uart3_div", "uart_gate", HW_UART3CLKDIV }, 106 { CLKID_SYS_UART4, "uart4_div", "uart_gate", HW_UART4CLKDIV }, 107 { CLKID_SYS_UART5, "uart5_div", "uart_gate", HW_UART5CLKDIV }, 108 { CLKID_SYS_UART6, "uart6_div", "uart_gate", HW_UART6CLKDIV }, 109 { CLKID_SYS_UART7, "uart7_div", "uart_gate", HW_UART7CLKDIV }, 110 { CLKID_SYS_UART8, "uart8_div", "uart_gate", HW_UART8CLKDIV }, 111 { CLKID_SYS_UART9, "uart9_div", "uart_gate", HW_UART9CLKDIV }, 112 113 { CLKID_SYS_SPI0, "spi0_div", "main_gate", HW_SPI0CLKDIV }, 114 { CLKID_SYS_SPI1, "spi1_div", "main_gate", HW_SPI1CLKDIV }, 115 { CLKID_SYS_QUADSPI, "quadspi_div", "main_gate", HW_QUADSPICLKDIV }, 116 { CLKID_SYS_SSP0, "ssp0_div", "main_gate", HW_SSP0CLKDIV }, 117 { CLKID_SYS_NAND, "nand_div", "main_gate", HW_NANDCLKDIV }, 118 { CLKID_SYS_TRACE, "trace_div", "main_gate", HW_TRACECLKDIV }, 119 { CLKID_SYS_CAMM, "camm_div", "main_gate", HW_CAMMCLKDIV }, 120 { CLKID_SYS_MAC, "mac_div", "main_gate", HW_MACCLKDIV }, 121 { CLKID_SYS_LCD, "lcd_div", "main_gate", HW_LCDCLKDIV }, 122 { CLKID_SYS_ADCANA, "adcana_div", "main_gate", HW_ADCANACLKDIV }, 123 124 { CLKID_SYS_WDT, "wdt_div", "wdt_gate", HW_WDTCLKDIV }, 125 { CLKID_SYS_CLKOUT, "clkout_div", "clkout_gate", HW_CLKOUTCLKDIV }, 126 }; 127 128 static const struct asm9260_gate_data asm9260_mux_gates[] __initconst = { 129 { 0, "main_gate", "main_mux", HW_MAINCLKUEN, 0 }, 130 { 0, "uart_gate", "uart_mux", HW_UARTCLKUEN, 0 }, 131 { 0, "i2s0_gate", "i2s0_mux", HW_I2S0CLKUEN, 0 }, 132 { 0, "i2s1_gate", "i2s1_mux", HW_I2S1CLKUEN, 0 }, 133 { 0, "wdt_gate", "wdt_mux", HW_WDTCLKUEN, 0 }, 134 { 0, "clkout_gate", "clkout_mux", HW_CLKOUTCLKUEN, 0 }, 135 }; 136 static const struct asm9260_gate_data asm9260_ahb_gates[] __initconst = { 137 /* ahb gates */ 138 { CLKID_AHB_ROM, "rom", "ahb_div", 139 HW_AHBCLKCTRL0, 1, CLK_IGNORE_UNUSED}, 140 { CLKID_AHB_RAM, "ram", "ahb_div", 141 HW_AHBCLKCTRL0, 2, CLK_IGNORE_UNUSED}, 142 { CLKID_AHB_GPIO, "gpio", "ahb_div", 143 HW_AHBCLKCTRL0, 4 }, 144 { CLKID_AHB_MAC, "mac", "ahb_div", 145 HW_AHBCLKCTRL0, 5 }, 146 { CLKID_AHB_EMI, "emi", "ahb_div", 147 HW_AHBCLKCTRL0, 6, CLK_IGNORE_UNUSED}, 148 { CLKID_AHB_USB0, "usb0", "ahb_div", 149 HW_AHBCLKCTRL0, 7 }, 150 { CLKID_AHB_USB1, "usb1", "ahb_div", 151 HW_AHBCLKCTRL0, 8 }, 152 { CLKID_AHB_DMA0, "dma0", "ahb_div", 153 HW_AHBCLKCTRL0, 9 }, 154 { CLKID_AHB_DMA1, "dma1", "ahb_div", 155 HW_AHBCLKCTRL0, 10 }, 156 { CLKID_AHB_UART0, "uart0", "ahb_div", 157 HW_AHBCLKCTRL0, 11 }, 158 { CLKID_AHB_UART1, "uart1", "ahb_div", 159 HW_AHBCLKCTRL0, 12 }, 160 { CLKID_AHB_UART2, "uart2", "ahb_div", 161 HW_AHBCLKCTRL0, 13 }, 162 { CLKID_AHB_UART3, "uart3", "ahb_div", 163 HW_AHBCLKCTRL0, 14 }, 164 { CLKID_AHB_UART4, "uart4", "ahb_div", 165 HW_AHBCLKCTRL0, 15 }, 166 { CLKID_AHB_UART5, "uart5", "ahb_div", 167 HW_AHBCLKCTRL0, 16 }, 168 { CLKID_AHB_UART6, "uart6", "ahb_div", 169 HW_AHBCLKCTRL0, 17 }, 170 { CLKID_AHB_UART7, "uart7", "ahb_div", 171 HW_AHBCLKCTRL0, 18 }, 172 { CLKID_AHB_UART8, "uart8", "ahb_div", 173 HW_AHBCLKCTRL0, 19 }, 174 { CLKID_AHB_UART9, "uart9", "ahb_div", 175 HW_AHBCLKCTRL0, 20 }, 176 { CLKID_AHB_I2S0, "i2s0", "ahb_div", 177 HW_AHBCLKCTRL0, 21 }, 178 { CLKID_AHB_I2C0, "i2c0", "ahb_div", 179 HW_AHBCLKCTRL0, 22 }, 180 { CLKID_AHB_I2C1, "i2c1", "ahb_div", 181 HW_AHBCLKCTRL0, 23 }, 182 { CLKID_AHB_SSP0, "ssp0", "ahb_div", 183 HW_AHBCLKCTRL0, 24 }, 184 { CLKID_AHB_IOCONFIG, "ioconf", "ahb_div", 185 HW_AHBCLKCTRL0, 25 }, 186 { CLKID_AHB_WDT, "wdt", "ahb_div", 187 HW_AHBCLKCTRL0, 26 }, 188 { CLKID_AHB_CAN0, "can0", "ahb_div", 189 HW_AHBCLKCTRL0, 27 }, 190 { CLKID_AHB_CAN1, "can1", "ahb_div", 191 HW_AHBCLKCTRL0, 28 }, 192 { CLKID_AHB_MPWM, "mpwm", "ahb_div", 193 HW_AHBCLKCTRL0, 29 }, 194 { CLKID_AHB_SPI0, "spi0", "ahb_div", 195 HW_AHBCLKCTRL0, 30 }, 196 { CLKID_AHB_SPI1, "spi1", "ahb_div", 197 HW_AHBCLKCTRL0, 31 }, 198 199 { CLKID_AHB_QEI, "qei", "ahb_div", 200 HW_AHBCLKCTRL1, 0 }, 201 { CLKID_AHB_QUADSPI0, "quadspi0", "ahb_div", 202 HW_AHBCLKCTRL1, 1 }, 203 { CLKID_AHB_CAMIF, "capmif", "ahb_div", 204 HW_AHBCLKCTRL1, 2 }, 205 { CLKID_AHB_LCDIF, "lcdif", "ahb_div", 206 HW_AHBCLKCTRL1, 3 }, 207 { CLKID_AHB_TIMER0, "timer0", "ahb_div", 208 HW_AHBCLKCTRL1, 4 }, 209 { CLKID_AHB_TIMER1, "timer1", "ahb_div", 210 HW_AHBCLKCTRL1, 5 }, 211 { CLKID_AHB_TIMER2, "timer2", "ahb_div", 212 HW_AHBCLKCTRL1, 6 }, 213 { CLKID_AHB_TIMER3, "timer3", "ahb_div", 214 HW_AHBCLKCTRL1, 7 }, 215 { CLKID_AHB_IRQ, "irq", "ahb_div", 216 HW_AHBCLKCTRL1, 8, CLK_IGNORE_UNUSED}, 217 { CLKID_AHB_RTC, "rtc", "ahb_div", 218 HW_AHBCLKCTRL1, 9 }, 219 { CLKID_AHB_NAND, "nand", "ahb_div", 220 HW_AHBCLKCTRL1, 10 }, 221 { CLKID_AHB_ADC0, "adc0", "ahb_div", 222 HW_AHBCLKCTRL1, 11 }, 223 { CLKID_AHB_LED, "led", "ahb_div", 224 HW_AHBCLKCTRL1, 12 }, 225 { CLKID_AHB_DAC0, "dac0", "ahb_div", 226 HW_AHBCLKCTRL1, 13 }, 227 { CLKID_AHB_LCD, "lcd", "ahb_div", 228 HW_AHBCLKCTRL1, 14 }, 229 { CLKID_AHB_I2S1, "i2s1", "ahb_div", 230 HW_AHBCLKCTRL1, 15 }, 231 { CLKID_AHB_MAC1, "mac1", "ahb_div", 232 HW_AHBCLKCTRL1, 16 }, 233 }; 234 235 static const char __initdata *main_mux_p[] = { NULL, NULL }; 236 static const char __initdata *i2s0_mux_p[] = { NULL, NULL, "i2s0m_div"}; 237 static const char __initdata *i2s1_mux_p[] = { NULL, NULL, "i2s1m_div"}; 238 static const char __initdata *clkout_mux_p[] = { NULL, NULL, "rtc"}; 239 static u32 three_mux_table[] = {0, 1, 3}; 240 241 static struct asm9260_mux_clock asm9260_mux_clks[] __initdata = { 242 { 1, three_mux_table, "main_mux", main_mux_p, 243 ARRAY_SIZE(main_mux_p), HW_MAINCLKSEL, }, 244 { 1, three_mux_table, "uart_mux", main_mux_p, 245 ARRAY_SIZE(main_mux_p), HW_UARTCLKSEL, }, 246 { 1, three_mux_table, "wdt_mux", main_mux_p, 247 ARRAY_SIZE(main_mux_p), HW_WDTCLKSEL, }, 248 { 3, three_mux_table, "i2s0_mux", i2s0_mux_p, 249 ARRAY_SIZE(i2s0_mux_p), HW_I2S0CLKSEL, }, 250 { 3, three_mux_table, "i2s1_mux", i2s1_mux_p, 251 ARRAY_SIZE(i2s1_mux_p), HW_I2S1CLKSEL, }, 252 { 3, three_mux_table, "clkout_mux", clkout_mux_p, 253 ARRAY_SIZE(clkout_mux_p), HW_CLKOUTCLKSEL, }, 254 }; 255 256 static void __init asm9260_acc_init(struct device_node *np) 257 { 258 struct clk_hw *hw; 259 struct clk_hw **hws; 260 const char *ref_clk, *pll_clk = "pll"; 261 u32 rate; 262 int n; 263 u32 accuracy = 0; 264 265 clk_data = kzalloc(struct_size(clk_data, hws, MAX_CLKS), GFP_KERNEL); 266 if (!clk_data) 267 return; 268 clk_data->num = MAX_CLKS; 269 hws = clk_data->hws; 270 271 base = of_io_request_and_map(np, 0, np->name); 272 if (IS_ERR(base)) 273 panic("%pOFn: unable to map resource", np); 274 275 /* register pll */ 276 rate = (ioread32(base + HW_SYSPLLCTRL) & 0xffff) * 1000000; 277 278 ref_clk = of_clk_get_parent_name(np, 0); 279 accuracy = clk_get_accuracy(__clk_lookup(ref_clk)); 280 hw = clk_hw_register_fixed_rate_with_accuracy(NULL, pll_clk, 281 ref_clk, 0, rate, accuracy); 282 283 if (IS_ERR(hw)) 284 panic("%pOFn: can't register REFCLK. Check DT!", np); 285 286 for (n = 0; n < ARRAY_SIZE(asm9260_mux_clks); n++) { 287 const struct asm9260_mux_clock *mc = &asm9260_mux_clks[n]; 288 289 mc->parent_names[0] = ref_clk; 290 mc->parent_names[1] = pll_clk; 291 hw = clk_hw_register_mux_table(NULL, mc->name, mc->parent_names, 292 mc->num_parents, mc->flags, base + mc->offset, 293 0, mc->mask, 0, mc->table, &asm9260_clk_lock); 294 } 295 296 /* clock mux gate cells */ 297 for (n = 0; n < ARRAY_SIZE(asm9260_mux_gates); n++) { 298 const struct asm9260_gate_data *gd = &asm9260_mux_gates[n]; 299 300 hw = clk_hw_register_gate(NULL, gd->name, 301 gd->parent_name, gd->flags | CLK_SET_RATE_PARENT, 302 base + gd->reg, gd->bit_idx, 0, &asm9260_clk_lock); 303 } 304 305 /* clock div cells */ 306 for (n = 0; n < ARRAY_SIZE(asm9260_div_clks); n++) { 307 const struct asm9260_div_clk *dc = &asm9260_div_clks[n]; 308 309 hws[dc->idx] = clk_hw_register_divider(NULL, dc->name, 310 dc->parent_name, CLK_SET_RATE_PARENT, 311 base + dc->reg, 0, 8, CLK_DIVIDER_ONE_BASED, 312 &asm9260_clk_lock); 313 } 314 315 /* clock ahb gate cells */ 316 for (n = 0; n < ARRAY_SIZE(asm9260_ahb_gates); n++) { 317 const struct asm9260_gate_data *gd = &asm9260_ahb_gates[n]; 318 319 hws[gd->idx] = clk_hw_register_gate(NULL, gd->name, 320 gd->parent_name, gd->flags, base + gd->reg, 321 gd->bit_idx, 0, &asm9260_clk_lock); 322 } 323 324 /* check for errors on leaf clocks */ 325 for (n = 0; n < MAX_CLKS; n++) { 326 if (!IS_ERR(hws[n])) 327 continue; 328 329 pr_err("%pOF: Unable to register leaf clock %d\n", 330 np, n); 331 goto fail; 332 } 333 334 /* register clk-provider */ 335 of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data); 336 return; 337 fail: 338 iounmap(base); 339 } 340 CLK_OF_DECLARE(asm9260_acc, "alphascale,asm9260-clock-controller", 341 asm9260_acc_init); 342