1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2012 Sascha Hauer <kernel@pengutronix.de> 4 */ 5 6 #include <linux/module.h> 7 #include <linux/clk.h> 8 #include <linux/clkdev.h> 9 #include <linux/io.h> 10 #include <linux/err.h> 11 #include <linux/of.h> 12 #include <linux/of_address.h> 13 #include <soc/imx/revision.h> 14 #include <soc/imx/timer.h> 15 #include <asm/irq.h> 16 17 #include "clk.h" 18 19 #define MX31_CCM_BASE_ADDR 0x53f80000 20 #define MX31_GPT1_BASE_ADDR 0x53f90000 21 #define MX31_INT_GPT (NR_IRQS_LEGACY + 29) 22 23 #define MXC_CCM_CCMR 0x00 24 #define MXC_CCM_PDR0 0x04 25 #define MXC_CCM_PDR1 0x08 26 #define MXC_CCM_MPCTL 0x10 27 #define MXC_CCM_UPCTL 0x14 28 #define MXC_CCM_SRPCTL 0x18 29 #define MXC_CCM_CGR0 0x20 30 #define MXC_CCM_CGR1 0x24 31 #define MXC_CCM_CGR2 0x28 32 #define MXC_CCM_PMCR0 0x5c 33 34 static const char *mcu_main_sel[] = { "spll", "mpll", }; 35 static const char *per_sel[] = { "per_div", "ipg", }; 36 static const char *csi_sel[] = { "upll", "spll", }; 37 static const char *fir_sel[] = { "mcu_main", "upll", "spll" }; 38 39 enum mx31_clks { 40 dummy, ckih, ckil, mpll, spll, upll, mcu_main, hsp, ahb, nfc, ipg, 41 per_div, per, csi, fir, csi_div, usb_div_pre, usb_div_post, fir_div_pre, 42 fir_div_post, sdhc1_gate, sdhc2_gate, gpt_gate, epit1_gate, epit2_gate, 43 iim_gate, ata_gate, sdma_gate, cspi3_gate, rng_gate, uart1_gate, 44 uart2_gate, ssi1_gate, i2c1_gate, i2c2_gate, i2c3_gate, hantro_gate, 45 mstick1_gate, mstick2_gate, csi_gate, rtc_gate, wdog_gate, pwm_gate, 46 sim_gate, ect_gate, usb_gate, kpp_gate, ipu_gate, uart3_gate, 47 uart4_gate, uart5_gate, owire_gate, ssi2_gate, cspi1_gate, cspi2_gate, 48 gacc_gate, emi_gate, rtic_gate, firi_gate, clk_max 49 }; 50 51 static struct clk *clk[clk_max]; 52 static struct clk_onecell_data clk_data; 53 54 static void __init _mx31_clocks_init(void __iomem *base, unsigned long fref) 55 { 56 clk[dummy] = imx_clk_fixed("dummy", 0); 57 clk[ckih] = imx_clk_fixed("ckih", fref); 58 clk[ckil] = imx_clk_fixed("ckil", 32768); 59 clk[mpll] = imx_clk_pllv1(IMX_PLLV1_IMX31, "mpll", "ckih", base + MXC_CCM_MPCTL); 60 clk[spll] = imx_clk_pllv1(IMX_PLLV1_IMX31, "spll", "ckih", base + MXC_CCM_SRPCTL); 61 clk[upll] = imx_clk_pllv1(IMX_PLLV1_IMX31, "upll", "ckih", base + MXC_CCM_UPCTL); 62 clk[mcu_main] = imx_clk_mux("mcu_main", base + MXC_CCM_PMCR0, 31, 1, mcu_main_sel, ARRAY_SIZE(mcu_main_sel)); 63 clk[hsp] = imx_clk_divider("hsp", "mcu_main", base + MXC_CCM_PDR0, 11, 3); 64 clk[ahb] = imx_clk_divider("ahb", "mcu_main", base + MXC_CCM_PDR0, 3, 3); 65 clk[nfc] = imx_clk_divider("nfc", "ahb", base + MXC_CCM_PDR0, 8, 3); 66 clk[ipg] = imx_clk_divider("ipg", "ahb", base + MXC_CCM_PDR0, 6, 2); 67 clk[per_div] = imx_clk_divider("per_div", "upll", base + MXC_CCM_PDR0, 16, 5); 68 clk[per] = imx_clk_mux("per", base + MXC_CCM_CCMR, 24, 1, per_sel, ARRAY_SIZE(per_sel)); 69 clk[csi] = imx_clk_mux("csi_sel", base + MXC_CCM_CCMR, 25, 1, csi_sel, ARRAY_SIZE(csi_sel)); 70 clk[fir] = imx_clk_mux("fir_sel", base + MXC_CCM_CCMR, 11, 2, fir_sel, ARRAY_SIZE(fir_sel)); 71 clk[csi_div] = imx_clk_divider("csi_div", "csi_sel", base + MXC_CCM_PDR0, 23, 9); 72 clk[usb_div_pre] = imx_clk_divider("usb_div_pre", "upll", base + MXC_CCM_PDR1, 30, 2); 73 clk[usb_div_post] = imx_clk_divider("usb_div_post", "usb_div_pre", base + MXC_CCM_PDR1, 27, 3); 74 clk[fir_div_pre] = imx_clk_divider("fir_div_pre", "fir_sel", base + MXC_CCM_PDR1, 24, 3); 75 clk[fir_div_post] = imx_clk_divider("fir_div_post", "fir_div_pre", base + MXC_CCM_PDR1, 23, 6); 76 clk[sdhc1_gate] = imx_clk_gate2("sdhc1_gate", "per", base + MXC_CCM_CGR0, 0); 77 clk[sdhc2_gate] = imx_clk_gate2("sdhc2_gate", "per", base + MXC_CCM_CGR0, 2); 78 clk[gpt_gate] = imx_clk_gate2("gpt_gate", "per", base + MXC_CCM_CGR0, 4); 79 clk[epit1_gate] = imx_clk_gate2("epit1_gate", "per", base + MXC_CCM_CGR0, 6); 80 clk[epit2_gate] = imx_clk_gate2("epit2_gate", "per", base + MXC_CCM_CGR0, 8); 81 clk[iim_gate] = imx_clk_gate2("iim_gate", "ipg", base + MXC_CCM_CGR0, 10); 82 clk[ata_gate] = imx_clk_gate2("ata_gate", "ipg", base + MXC_CCM_CGR0, 12); 83 clk[sdma_gate] = imx_clk_gate2("sdma_gate", "ahb", base + MXC_CCM_CGR0, 14); 84 clk[cspi3_gate] = imx_clk_gate2("cspi3_gate", "ipg", base + MXC_CCM_CGR0, 16); 85 clk[rng_gate] = imx_clk_gate2("rng_gate", "ipg", base + MXC_CCM_CGR0, 18); 86 clk[uart1_gate] = imx_clk_gate2("uart1_gate", "per", base + MXC_CCM_CGR0, 20); 87 clk[uart2_gate] = imx_clk_gate2("uart2_gate", "per", base + MXC_CCM_CGR0, 22); 88 clk[ssi1_gate] = imx_clk_gate2("ssi1_gate", "spll", base + MXC_CCM_CGR0, 24); 89 clk[i2c1_gate] = imx_clk_gate2("i2c1_gate", "per", base + MXC_CCM_CGR0, 26); 90 clk[i2c2_gate] = imx_clk_gate2("i2c2_gate", "per", base + MXC_CCM_CGR0, 28); 91 clk[i2c3_gate] = imx_clk_gate2("i2c3_gate", "per", base + MXC_CCM_CGR0, 30); 92 clk[hantro_gate] = imx_clk_gate2("hantro_gate", "per", base + MXC_CCM_CGR1, 0); 93 clk[mstick1_gate] = imx_clk_gate2("mstick1_gate", "per", base + MXC_CCM_CGR1, 2); 94 clk[mstick2_gate] = imx_clk_gate2("mstick2_gate", "per", base + MXC_CCM_CGR1, 4); 95 clk[csi_gate] = imx_clk_gate2("csi_gate", "csi_div", base + MXC_CCM_CGR1, 6); 96 clk[rtc_gate] = imx_clk_gate2("rtc_gate", "ipg", base + MXC_CCM_CGR1, 8); 97 clk[wdog_gate] = imx_clk_gate2("wdog_gate", "ipg", base + MXC_CCM_CGR1, 10); 98 clk[pwm_gate] = imx_clk_gate2("pwm_gate", "per", base + MXC_CCM_CGR1, 12); 99 clk[sim_gate] = imx_clk_gate2("sim_gate", "per", base + MXC_CCM_CGR1, 14); 100 clk[ect_gate] = imx_clk_gate2("ect_gate", "per", base + MXC_CCM_CGR1, 16); 101 clk[usb_gate] = imx_clk_gate2("usb_gate", "ahb", base + MXC_CCM_CGR1, 18); 102 clk[kpp_gate] = imx_clk_gate2("kpp_gate", "ipg", base + MXC_CCM_CGR1, 20); 103 clk[ipu_gate] = imx_clk_gate2("ipu_gate", "hsp", base + MXC_CCM_CGR1, 22); 104 clk[uart3_gate] = imx_clk_gate2("uart3_gate", "per", base + MXC_CCM_CGR1, 24); 105 clk[uart4_gate] = imx_clk_gate2("uart4_gate", "per", base + MXC_CCM_CGR1, 26); 106 clk[uart5_gate] = imx_clk_gate2("uart5_gate", "per", base + MXC_CCM_CGR1, 28); 107 clk[owire_gate] = imx_clk_gate2("owire_gate", "per", base + MXC_CCM_CGR1, 30); 108 clk[ssi2_gate] = imx_clk_gate2("ssi2_gate", "spll", base + MXC_CCM_CGR2, 0); 109 clk[cspi1_gate] = imx_clk_gate2("cspi1_gate", "ipg", base + MXC_CCM_CGR2, 2); 110 clk[cspi2_gate] = imx_clk_gate2("cspi2_gate", "ipg", base + MXC_CCM_CGR2, 4); 111 clk[gacc_gate] = imx_clk_gate2("gacc_gate", "per", base + MXC_CCM_CGR2, 6); 112 clk[emi_gate] = imx_clk_gate2("emi_gate", "ahb", base + MXC_CCM_CGR2, 8); 113 clk[rtic_gate] = imx_clk_gate2("rtic_gate", "ahb", base + MXC_CCM_CGR2, 10); 114 clk[firi_gate] = imx_clk_gate2("firi_gate", "upll", base+MXC_CCM_CGR2, 12); 115 116 imx_check_clocks(clk, ARRAY_SIZE(clk)); 117 118 clk_set_parent(clk[csi], clk[upll]); 119 clk_prepare_enable(clk[emi_gate]); 120 clk_prepare_enable(clk[iim_gate]); 121 mx31_revision(); 122 clk_disable_unprepare(clk[iim_gate]); 123 } 124 125 static void __init mx31_clocks_init_dt(struct device_node *np) 126 { 127 struct device_node *osc_np; 128 u32 fref = 26000000; /* default */ 129 void __iomem *ccm; 130 131 for_each_compatible_node(osc_np, NULL, "fixed-clock") { 132 if (!of_device_is_compatible(osc_np, "fsl,imx-osc26m")) 133 continue; 134 135 if (!of_property_read_u32(osc_np, "clock-frequency", &fref)) { 136 of_node_put(osc_np); 137 break; 138 } 139 } 140 141 ccm = of_iomap(np, 0); 142 if (!ccm) 143 panic("%s: failed to map registers\n", __func__); 144 145 _mx31_clocks_init(ccm, fref); 146 147 clk_data.clks = clk; 148 clk_data.clk_num = ARRAY_SIZE(clk); 149 of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); 150 } 151 152 CLK_OF_DECLARE(imx31_ccm, "fsl,imx31-ccm", mx31_clocks_init_dt); 153