1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2009 by Sascha Hauer, Pengutronix 4 */ 5 6 #include <linux/kernel.h> 7 #include <linux/init.h> 8 #include <linux/list.h> 9 #include <linux/clk.h> 10 #include <linux/io.h> 11 #include <linux/clkdev.h> 12 #include <linux/err.h> 13 #include <linux/of.h> 14 #include <linux/of_address.h> 15 #include <linux/of_irq.h> 16 17 #include "clk.h" 18 19 #define CCM_MPCTL 0x00 20 #define CCM_UPCTL 0x04 21 #define CCM_CCTL 0x08 22 #define CCM_CGCR0 0x0C 23 #define CCM_CGCR1 0x10 24 #define CCM_CGCR2 0x14 25 #define CCM_PCDR0 0x18 26 #define CCM_PCDR1 0x1C 27 #define CCM_PCDR2 0x20 28 #define CCM_PCDR3 0x24 29 #define CCM_RCSR 0x28 30 #define CCM_CRDR 0x2C 31 #define CCM_DCVR0 0x30 32 #define CCM_DCVR1 0x34 33 #define CCM_DCVR2 0x38 34 #define CCM_DCVR3 0x3c 35 #define CCM_LTR0 0x40 36 #define CCM_LTR1 0x44 37 #define CCM_LTR2 0x48 38 #define CCM_LTR3 0x4c 39 #define CCM_MCR 0x64 40 41 #define ccm(x) (ccm_base + (x)) 42 43 static struct clk_onecell_data clk_data; 44 45 static const char *cpu_sel_clks[] = { "mpll", "mpll_cpu_3_4", }; 46 static const char *per_sel_clks[] = { "ahb", "upll", }; 47 static const char *cko_sel_clks[] = { "dummy", "osc", "cpu", "ahb", 48 "ipg", "dummy", "dummy", "dummy", 49 "dummy", "dummy", "per0", "per2", 50 "per13", "per14", "usbotg_ahb", "dummy",}; 51 52 enum mx25_clks { 53 dummy, osc, mpll, upll, mpll_cpu_3_4, cpu_sel, cpu, ahb, usb_div, ipg, 54 per0_sel, per1_sel, per2_sel, per3_sel, per4_sel, per5_sel, per6_sel, 55 per7_sel, per8_sel, per9_sel, per10_sel, per11_sel, per12_sel, 56 per13_sel, per14_sel, per15_sel, per0, per1, per2, per3, per4, per5, 57 per6, per7, per8, per9, per10, per11, per12, per13, per14, per15, 58 csi_ipg_per, epit_ipg_per, esai_ipg_per, esdhc1_ipg_per, esdhc2_ipg_per, 59 gpt_ipg_per, i2c_ipg_per, lcdc_ipg_per, nfc_ipg_per, owire_ipg_per, 60 pwm_ipg_per, sim1_ipg_per, sim2_ipg_per, ssi1_ipg_per, ssi2_ipg_per, 61 uart_ipg_per, ata_ahb, reserved1, csi_ahb, emi_ahb, esai_ahb, esdhc1_ahb, 62 esdhc2_ahb, fec_ahb, lcdc_ahb, rtic_ahb, sdma_ahb, slcdc_ahb, usbotg_ahb, 63 reserved2, reserved3, reserved4, reserved5, can1_ipg, can2_ipg, csi_ipg, 64 cspi1_ipg, cspi2_ipg, cspi3_ipg, dryice_ipg, ect_ipg, epit1_ipg, epit2_ipg, 65 reserved6, esdhc1_ipg, esdhc2_ipg, fec_ipg, reserved7, reserved8, reserved9, 66 gpt1_ipg, gpt2_ipg, gpt3_ipg, gpt4_ipg, reserved10, reserved11, reserved12, 67 iim_ipg, reserved13, reserved14, kpp_ipg, lcdc_ipg, reserved15, pwm1_ipg, 68 pwm2_ipg, pwm3_ipg, pwm4_ipg, rngb_ipg, reserved16, scc_ipg, sdma_ipg, 69 sim1_ipg, sim2_ipg, slcdc_ipg, spba_ipg, ssi1_ipg, ssi2_ipg, tsc_ipg, 70 uart1_ipg, uart2_ipg, uart3_ipg, uart4_ipg, uart5_ipg, reserved17, 71 wdt_ipg, cko_div, cko_sel, cko, clk_max 72 }; 73 74 static struct clk *clk[clk_max]; 75 76 static struct clk ** const uart_clks[] __initconst = { 77 &clk[uart_ipg_per], 78 &clk[uart1_ipg], 79 &clk[uart2_ipg], 80 &clk[uart3_ipg], 81 &clk[uart4_ipg], 82 &clk[uart5_ipg], 83 NULL 84 }; 85 86 static int __init __mx25_clocks_init(void __iomem *ccm_base) 87 { 88 BUG_ON(!ccm_base); 89 90 clk[dummy] = imx_clk_fixed("dummy", 0); 91 clk[mpll] = imx_clk_pllv1(IMX_PLLV1_IMX25, "mpll", "osc", ccm(CCM_MPCTL)); 92 clk[upll] = imx_clk_pllv1(IMX_PLLV1_IMX25, "upll", "osc", ccm(CCM_UPCTL)); 93 clk[mpll_cpu_3_4] = imx_clk_fixed_factor("mpll_cpu_3_4", "mpll", 3, 4); 94 clk[cpu_sel] = imx_clk_mux("cpu_sel", ccm(CCM_CCTL), 14, 1, cpu_sel_clks, ARRAY_SIZE(cpu_sel_clks)); 95 clk[cpu] = imx_clk_divider("cpu", "cpu_sel", ccm(CCM_CCTL), 30, 2); 96 clk[ahb] = imx_clk_divider("ahb", "cpu", ccm(CCM_CCTL), 28, 2); 97 clk[usb_div] = imx_clk_divider("usb_div", "upll", ccm(CCM_CCTL), 16, 6); 98 clk[ipg] = imx_clk_fixed_factor("ipg", "ahb", 1, 2); 99 clk[per0_sel] = imx_clk_mux("per0_sel", ccm(CCM_MCR), 0, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 100 clk[per1_sel] = imx_clk_mux("per1_sel", ccm(CCM_MCR), 1, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 101 clk[per2_sel] = imx_clk_mux("per2_sel", ccm(CCM_MCR), 2, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 102 clk[per3_sel] = imx_clk_mux("per3_sel", ccm(CCM_MCR), 3, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 103 clk[per4_sel] = imx_clk_mux("per4_sel", ccm(CCM_MCR), 4, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 104 clk[per5_sel] = imx_clk_mux("per5_sel", ccm(CCM_MCR), 5, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 105 clk[per6_sel] = imx_clk_mux("per6_sel", ccm(CCM_MCR), 6, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 106 clk[per7_sel] = imx_clk_mux("per7_sel", ccm(CCM_MCR), 7, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 107 clk[per8_sel] = imx_clk_mux("per8_sel", ccm(CCM_MCR), 8, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 108 clk[per9_sel] = imx_clk_mux("per9_sel", ccm(CCM_MCR), 9, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 109 clk[per10_sel] = imx_clk_mux("per10_sel", ccm(CCM_MCR), 10, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 110 clk[per11_sel] = imx_clk_mux("per11_sel", ccm(CCM_MCR), 11, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 111 clk[per12_sel] = imx_clk_mux("per12_sel", ccm(CCM_MCR), 12, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 112 clk[per13_sel] = imx_clk_mux("per13_sel", ccm(CCM_MCR), 13, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 113 clk[per14_sel] = imx_clk_mux("per14_sel", ccm(CCM_MCR), 14, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 114 clk[per15_sel] = imx_clk_mux("per15_sel", ccm(CCM_MCR), 15, 1, per_sel_clks, ARRAY_SIZE(per_sel_clks)); 115 clk[cko_div] = imx_clk_divider("cko_div", "cko_sel", ccm(CCM_MCR), 24, 6); 116 clk[cko_sel] = imx_clk_mux("cko_sel", ccm(CCM_MCR), 20, 4, cko_sel_clks, ARRAY_SIZE(cko_sel_clks)); 117 clk[cko] = imx_clk_gate("cko", "cko_div", ccm(CCM_MCR), 30); 118 clk[per0] = imx_clk_divider("per0", "per0_sel", ccm(CCM_PCDR0), 0, 6); 119 clk[per1] = imx_clk_divider("per1", "per1_sel", ccm(CCM_PCDR0), 8, 6); 120 clk[per2] = imx_clk_divider("per2", "per2_sel", ccm(CCM_PCDR0), 16, 6); 121 clk[per3] = imx_clk_divider("per3", "per3_sel", ccm(CCM_PCDR0), 24, 6); 122 clk[per4] = imx_clk_divider("per4", "per4_sel", ccm(CCM_PCDR1), 0, 6); 123 clk[per5] = imx_clk_divider("per5", "per5_sel", ccm(CCM_PCDR1), 8, 6); 124 clk[per6] = imx_clk_divider("per6", "per6_sel", ccm(CCM_PCDR1), 16, 6); 125 clk[per7] = imx_clk_divider("per7", "per7_sel", ccm(CCM_PCDR1), 24, 6); 126 clk[per8] = imx_clk_divider("per8", "per8_sel", ccm(CCM_PCDR2), 0, 6); 127 clk[per9] = imx_clk_divider("per9", "per9_sel", ccm(CCM_PCDR2), 8, 6); 128 clk[per10] = imx_clk_divider("per10", "per10_sel", ccm(CCM_PCDR2), 16, 6); 129 clk[per11] = imx_clk_divider("per11", "per11_sel", ccm(CCM_PCDR2), 24, 6); 130 clk[per12] = imx_clk_divider("per12", "per12_sel", ccm(CCM_PCDR3), 0, 6); 131 clk[per13] = imx_clk_divider("per13", "per13_sel", ccm(CCM_PCDR3), 8, 6); 132 clk[per14] = imx_clk_divider("per14", "per14_sel", ccm(CCM_PCDR3), 16, 6); 133 clk[per15] = imx_clk_divider("per15", "per15_sel", ccm(CCM_PCDR3), 24, 6); 134 clk[csi_ipg_per] = imx_clk_gate("csi_ipg_per", "per0", ccm(CCM_CGCR0), 0); 135 clk[epit_ipg_per] = imx_clk_gate("epit_ipg_per", "per1", ccm(CCM_CGCR0), 1); 136 clk[esai_ipg_per] = imx_clk_gate("esai_ipg_per", "per2", ccm(CCM_CGCR0), 2); 137 clk[esdhc1_ipg_per] = imx_clk_gate("esdhc1_ipg_per", "per3", ccm(CCM_CGCR0), 3); 138 clk[esdhc2_ipg_per] = imx_clk_gate("esdhc2_ipg_per", "per4", ccm(CCM_CGCR0), 4); 139 clk[gpt_ipg_per] = imx_clk_gate("gpt_ipg_per", "per5", ccm(CCM_CGCR0), 5); 140 clk[i2c_ipg_per] = imx_clk_gate("i2c_ipg_per", "per6", ccm(CCM_CGCR0), 6); 141 clk[lcdc_ipg_per] = imx_clk_gate("lcdc_ipg_per", "per7", ccm(CCM_CGCR0), 7); 142 clk[nfc_ipg_per] = imx_clk_gate("nfc_ipg_per", "per8", ccm(CCM_CGCR0), 8); 143 clk[owire_ipg_per] = imx_clk_gate("owire_ipg_per", "per9", ccm(CCM_CGCR0), 9); 144 clk[pwm_ipg_per] = imx_clk_gate("pwm_ipg_per", "per10", ccm(CCM_CGCR0), 10); 145 clk[sim1_ipg_per] = imx_clk_gate("sim1_ipg_per", "per11", ccm(CCM_CGCR0), 11); 146 clk[sim2_ipg_per] = imx_clk_gate("sim2_ipg_per", "per12", ccm(CCM_CGCR0), 12); 147 clk[ssi1_ipg_per] = imx_clk_gate("ssi1_ipg_per", "per13", ccm(CCM_CGCR0), 13); 148 clk[ssi2_ipg_per] = imx_clk_gate("ssi2_ipg_per", "per14", ccm(CCM_CGCR0), 14); 149 clk[uart_ipg_per] = imx_clk_gate("uart_ipg_per", "per15", ccm(CCM_CGCR0), 15); 150 clk[ata_ahb] = imx_clk_gate("ata_ahb", "ahb", ccm(CCM_CGCR0), 16); 151 /* CCM_CGCR0(17): reserved */ 152 clk[csi_ahb] = imx_clk_gate("csi_ahb", "ahb", ccm(CCM_CGCR0), 18); 153 clk[emi_ahb] = imx_clk_gate("emi_ahb", "ahb", ccm(CCM_CGCR0), 19); 154 clk[esai_ahb] = imx_clk_gate("esai_ahb", "ahb", ccm(CCM_CGCR0), 20); 155 clk[esdhc1_ahb] = imx_clk_gate("esdhc1_ahb", "ahb", ccm(CCM_CGCR0), 21); 156 clk[esdhc2_ahb] = imx_clk_gate("esdhc2_ahb", "ahb", ccm(CCM_CGCR0), 22); 157 clk[fec_ahb] = imx_clk_gate("fec_ahb", "ahb", ccm(CCM_CGCR0), 23); 158 clk[lcdc_ahb] = imx_clk_gate("lcdc_ahb", "ahb", ccm(CCM_CGCR0), 24); 159 clk[rtic_ahb] = imx_clk_gate("rtic_ahb", "ahb", ccm(CCM_CGCR0), 25); 160 clk[sdma_ahb] = imx_clk_gate("sdma_ahb", "ahb", ccm(CCM_CGCR0), 26); 161 clk[slcdc_ahb] = imx_clk_gate("slcdc_ahb", "ahb", ccm(CCM_CGCR0), 27); 162 clk[usbotg_ahb] = imx_clk_gate("usbotg_ahb", "ahb", ccm(CCM_CGCR0), 28); 163 /* CCM_CGCR0(29-31): reserved */ 164 /* CCM_CGCR1(0): reserved in datasheet, used as audmux in FSL kernel */ 165 clk[can1_ipg] = imx_clk_gate("can1_ipg", "ipg", ccm(CCM_CGCR1), 2); 166 clk[can2_ipg] = imx_clk_gate("can2_ipg", "ipg", ccm(CCM_CGCR1), 3); 167 clk[csi_ipg] = imx_clk_gate("csi_ipg", "ipg", ccm(CCM_CGCR1), 4); 168 clk[cspi1_ipg] = imx_clk_gate("cspi1_ipg", "ipg", ccm(CCM_CGCR1), 5); 169 clk[cspi2_ipg] = imx_clk_gate("cspi2_ipg", "ipg", ccm(CCM_CGCR1), 6); 170 clk[cspi3_ipg] = imx_clk_gate("cspi3_ipg", "ipg", ccm(CCM_CGCR1), 7); 171 clk[dryice_ipg] = imx_clk_gate("dryice_ipg", "ipg", ccm(CCM_CGCR1), 8); 172 clk[ect_ipg] = imx_clk_gate("ect_ipg", "ipg", ccm(CCM_CGCR1), 9); 173 clk[epit1_ipg] = imx_clk_gate("epit1_ipg", "ipg", ccm(CCM_CGCR1), 10); 174 clk[epit2_ipg] = imx_clk_gate("epit2_ipg", "ipg", ccm(CCM_CGCR1), 11); 175 /* CCM_CGCR1(12): reserved in datasheet, used as esai in FSL kernel */ 176 clk[esdhc1_ipg] = imx_clk_gate("esdhc1_ipg", "ipg", ccm(CCM_CGCR1), 13); 177 clk[esdhc2_ipg] = imx_clk_gate("esdhc2_ipg", "ipg", ccm(CCM_CGCR1), 14); 178 clk[fec_ipg] = imx_clk_gate("fec_ipg", "ipg", ccm(CCM_CGCR1), 15); 179 /* CCM_CGCR1(16): reserved in datasheet, used as gpio1 in FSL kernel */ 180 /* CCM_CGCR1(17): reserved in datasheet, used as gpio2 in FSL kernel */ 181 /* CCM_CGCR1(18): reserved in datasheet, used as gpio3 in FSL kernel */ 182 clk[gpt1_ipg] = imx_clk_gate("gpt1_ipg", "ipg", ccm(CCM_CGCR1), 19); 183 clk[gpt2_ipg] = imx_clk_gate("gpt2_ipg", "ipg", ccm(CCM_CGCR1), 20); 184 clk[gpt3_ipg] = imx_clk_gate("gpt3_ipg", "ipg", ccm(CCM_CGCR1), 21); 185 clk[gpt4_ipg] = imx_clk_gate("gpt4_ipg", "ipg", ccm(CCM_CGCR1), 22); 186 /* CCM_CGCR1(23): reserved in datasheet, used as i2c1 in FSL kernel */ 187 /* CCM_CGCR1(24): reserved in datasheet, used as i2c2 in FSL kernel */ 188 /* CCM_CGCR1(25): reserved in datasheet, used as i2c3 in FSL kernel */ 189 clk[iim_ipg] = imx_clk_gate("iim_ipg", "ipg", ccm(CCM_CGCR1), 26); 190 /* CCM_CGCR1(27): reserved in datasheet, used as iomuxc in FSL kernel */ 191 /* CCM_CGCR1(28): reserved in datasheet, used as kpp in FSL kernel */ 192 clk[kpp_ipg] = imx_clk_gate("kpp_ipg", "ipg", ccm(CCM_CGCR1), 28); 193 clk[lcdc_ipg] = imx_clk_gate("lcdc_ipg", "ipg", ccm(CCM_CGCR1), 29); 194 /* CCM_CGCR1(30): reserved in datasheet, used as owire in FSL kernel */ 195 clk[pwm1_ipg] = imx_clk_gate("pwm1_ipg", "ipg", ccm(CCM_CGCR1), 31); 196 clk[pwm2_ipg] = imx_clk_gate("pwm2_ipg", "ipg", ccm(CCM_CGCR2), 0); 197 clk[pwm3_ipg] = imx_clk_gate("pwm3_ipg", "ipg", ccm(CCM_CGCR2), 1); 198 clk[pwm4_ipg] = imx_clk_gate("pwm4_ipg", "ipg", ccm(CCM_CGCR2), 2); 199 clk[rngb_ipg] = imx_clk_gate("rngb_ipg", "ipg", ccm(CCM_CGCR2), 3); 200 /* CCM_CGCR2(4): reserved in datasheet, used as rtic in FSL kernel */ 201 clk[scc_ipg] = imx_clk_gate("scc_ipg", "ipg", ccm(CCM_CGCR2), 5); 202 clk[sdma_ipg] = imx_clk_gate("sdma_ipg", "ipg", ccm(CCM_CGCR2), 6); 203 clk[sim1_ipg] = imx_clk_gate("sim1_ipg", "ipg", ccm(CCM_CGCR2), 7); 204 clk[sim2_ipg] = imx_clk_gate("sim2_ipg", "ipg", ccm(CCM_CGCR2), 8); 205 clk[slcdc_ipg] = imx_clk_gate("slcdc_ipg", "ipg", ccm(CCM_CGCR2), 9); 206 clk[spba_ipg] = imx_clk_gate("spba_ipg", "ipg", ccm(CCM_CGCR2), 10); 207 clk[ssi1_ipg] = imx_clk_gate("ssi1_ipg", "ipg", ccm(CCM_CGCR2), 11); 208 clk[ssi2_ipg] = imx_clk_gate("ssi2_ipg", "ipg", ccm(CCM_CGCR2), 12); 209 clk[tsc_ipg] = imx_clk_gate("tsc_ipg", "ipg", ccm(CCM_CGCR2), 13); 210 clk[uart1_ipg] = imx_clk_gate("uart1_ipg", "ipg", ccm(CCM_CGCR2), 14); 211 clk[uart2_ipg] = imx_clk_gate("uart2_ipg", "ipg", ccm(CCM_CGCR2), 15); 212 clk[uart3_ipg] = imx_clk_gate("uart3_ipg", "ipg", ccm(CCM_CGCR2), 16); 213 clk[uart4_ipg] = imx_clk_gate("uart4_ipg", "ipg", ccm(CCM_CGCR2), 17); 214 clk[uart5_ipg] = imx_clk_gate("uart5_ipg", "ipg", ccm(CCM_CGCR2), 18); 215 /* CCM_CGCR2(19): reserved in datasheet, but used as wdt in FSL kernel */ 216 clk[wdt_ipg] = imx_clk_gate("wdt_ipg", "ipg", ccm(CCM_CGCR2), 19); 217 218 imx_check_clocks(clk, ARRAY_SIZE(clk)); 219 220 clk_prepare_enable(clk[emi_ahb]); 221 222 /* Clock source for gpt must be derived from AHB */ 223 clk_set_parent(clk[per5_sel], clk[ahb]); 224 225 /* 226 * Let's initially set up CLKO parent as ipg, since this configuration 227 * is used on some imx25 board designs to clock the audio codec. 228 */ 229 clk_set_parent(clk[cko_sel], clk[ipg]); 230 231 imx_register_uart_clocks(uart_clks); 232 233 return 0; 234 } 235 236 static void __init mx25_clocks_init_dt(struct device_node *np) 237 { 238 void __iomem *ccm; 239 240 ccm = of_iomap(np, 0); 241 __mx25_clocks_init(ccm); 242 243 clk_data.clks = clk; 244 clk_data.clk_num = ARRAY_SIZE(clk); 245 of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); 246 } 247 CLK_OF_DECLARE(imx25_ccm, "fsl,imx25-ccm", mx25_clocks_init_dt); 248