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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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 <asm/irq.h>15 16#include "clk.h"17 18#define MX31_CCM_BASE_ADDR 0x53f8000019#define MX31_GPT1_BASE_ADDR 0x53f9000020#define MX31_INT_GPT (NR_IRQS_LEGACY + 29)21 22#define MXC_CCM_CCMR 0x0023#define MXC_CCM_PDR0 0x0424#define MXC_CCM_PDR1 0x0825#define MXC_CCM_MPCTL 0x1026#define MXC_CCM_UPCTL 0x1427#define MXC_CCM_SRPCTL 0x1828#define MXC_CCM_CGR0 0x2029#define MXC_CCM_CGR1 0x2430#define MXC_CCM_CGR2 0x2831#define MXC_CCM_PMCR0 0x5c32 33static const char *mcu_main_sel[] = { "spll", "mpll", };34static const char *per_sel[] = { "per_div", "ipg", };35static const char *csi_sel[] = { "upll", "spll", };36static const char *fir_sel[] = { "mcu_main", "upll", "spll" };37 38enum mx31_clks {39 dummy, ckih, ckil, mpll, spll, upll, mcu_main, hsp, ahb, nfc, ipg,40 per_div, per, csi, fir, csi_div, usb_div_pre, usb_div_post, fir_div_pre,41 fir_div_post, sdhc1_gate, sdhc2_gate, gpt_gate, epit1_gate, epit2_gate,42 iim_gate, ata_gate, sdma_gate, cspi3_gate, rng_gate, uart1_gate,43 uart2_gate, ssi1_gate, i2c1_gate, i2c2_gate, i2c3_gate, hantro_gate,44 mstick1_gate, mstick2_gate, csi_gate, rtc_gate, wdog_gate, pwm_gate,45 sim_gate, ect_gate, usb_gate, kpp_gate, ipu_gate, uart3_gate,46 uart4_gate, uart5_gate, owire_gate, ssi2_gate, cspi1_gate, cspi2_gate,47 gacc_gate, emi_gate, rtic_gate, firi_gate, clk_max48};49 50static struct clk *clk[clk_max];51static struct clk_onecell_data clk_data;52 53static void __init _mx31_clocks_init(void __iomem *base, unsigned long fref)54{55 clk[dummy] = imx_clk_fixed("dummy", 0);56 clk[ckih] = imx_clk_fixed("ckih", fref);57 clk[ckil] = imx_clk_fixed("ckil", 32768);58 clk[mpll] = imx_clk_pllv1(IMX_PLLV1_IMX31, "mpll", "ckih", base + MXC_CCM_MPCTL);59 clk[spll] = imx_clk_pllv1(IMX_PLLV1_IMX31, "spll", "ckih", base + MXC_CCM_SRPCTL);60 clk[upll] = imx_clk_pllv1(IMX_PLLV1_IMX31, "upll", "ckih", base + MXC_CCM_UPCTL);61 clk[mcu_main] = imx_clk_mux("mcu_main", base + MXC_CCM_PMCR0, 31, 1, mcu_main_sel, ARRAY_SIZE(mcu_main_sel));62 clk[hsp] = imx_clk_divider("hsp", "mcu_main", base + MXC_CCM_PDR0, 11, 3);63 clk[ahb] = imx_clk_divider("ahb", "mcu_main", base + MXC_CCM_PDR0, 3, 3);64 clk[nfc] = imx_clk_divider("nfc", "ahb", base + MXC_CCM_PDR0, 8, 3);65 clk[ipg] = imx_clk_divider("ipg", "ahb", base + MXC_CCM_PDR0, 6, 2);66 clk[per_div] = imx_clk_divider("per_div", "upll", base + MXC_CCM_PDR0, 16, 5);67 clk[per] = imx_clk_mux("per", base + MXC_CCM_CCMR, 24, 1, per_sel, ARRAY_SIZE(per_sel));68 clk[csi] = imx_clk_mux("csi_sel", base + MXC_CCM_CCMR, 25, 1, csi_sel, ARRAY_SIZE(csi_sel));69 clk[fir] = imx_clk_mux("fir_sel", base + MXC_CCM_CCMR, 11, 2, fir_sel, ARRAY_SIZE(fir_sel));70 clk[csi_div] = imx_clk_divider("csi_div", "csi_sel", base + MXC_CCM_PDR0, 23, 9);71 clk[usb_div_pre] = imx_clk_divider("usb_div_pre", "upll", base + MXC_CCM_PDR1, 30, 2);72 clk[usb_div_post] = imx_clk_divider("usb_div_post", "usb_div_pre", base + MXC_CCM_PDR1, 27, 3);73 clk[fir_div_pre] = imx_clk_divider("fir_div_pre", "fir_sel", base + MXC_CCM_PDR1, 24, 3);74 clk[fir_div_post] = imx_clk_divider("fir_div_post", "fir_div_pre", base + MXC_CCM_PDR1, 23, 6);75 clk[sdhc1_gate] = imx_clk_gate2("sdhc1_gate", "per", base + MXC_CCM_CGR0, 0);76 clk[sdhc2_gate] = imx_clk_gate2("sdhc2_gate", "per", base + MXC_CCM_CGR0, 2);77 clk[gpt_gate] = imx_clk_gate2("gpt_gate", "per", base + MXC_CCM_CGR0, 4);78 clk[epit1_gate] = imx_clk_gate2("epit1_gate", "per", base + MXC_CCM_CGR0, 6);79 clk[epit2_gate] = imx_clk_gate2("epit2_gate", "per", base + MXC_CCM_CGR0, 8);80 clk[iim_gate] = imx_clk_gate2("iim_gate", "ipg", base + MXC_CCM_CGR0, 10);81 clk[ata_gate] = imx_clk_gate2("ata_gate", "ipg", base + MXC_CCM_CGR0, 12);82 clk[sdma_gate] = imx_clk_gate2("sdma_gate", "ahb", base + MXC_CCM_CGR0, 14);83 clk[cspi3_gate] = imx_clk_gate2("cspi3_gate", "ipg", base + MXC_CCM_CGR0, 16);84 clk[rng_gate] = imx_clk_gate2("rng_gate", "ipg", base + MXC_CCM_CGR0, 18);85 clk[uart1_gate] = imx_clk_gate2("uart1_gate", "per", base + MXC_CCM_CGR0, 20);86 clk[uart2_gate] = imx_clk_gate2("uart2_gate", "per", base + MXC_CCM_CGR0, 22);87 clk[ssi1_gate] = imx_clk_gate2("ssi1_gate", "spll", base + MXC_CCM_CGR0, 24);88 clk[i2c1_gate] = imx_clk_gate2("i2c1_gate", "per", base + MXC_CCM_CGR0, 26);89 clk[i2c2_gate] = imx_clk_gate2("i2c2_gate", "per", base + MXC_CCM_CGR0, 28);90 clk[i2c3_gate] = imx_clk_gate2("i2c3_gate", "per", base + MXC_CCM_CGR0, 30);91 clk[hantro_gate] = imx_clk_gate2("hantro_gate", "per", base + MXC_CCM_CGR1, 0);92 clk[mstick1_gate] = imx_clk_gate2("mstick1_gate", "per", base + MXC_CCM_CGR1, 2);93 clk[mstick2_gate] = imx_clk_gate2("mstick2_gate", "per", base + MXC_CCM_CGR1, 4);94 clk[csi_gate] = imx_clk_gate2("csi_gate", "csi_div", base + MXC_CCM_CGR1, 6);95 clk[rtc_gate] = imx_clk_gate2("rtc_gate", "ipg", base + MXC_CCM_CGR1, 8);96 clk[wdog_gate] = imx_clk_gate2("wdog_gate", "ipg", base + MXC_CCM_CGR1, 10);97 clk[pwm_gate] = imx_clk_gate2("pwm_gate", "per", base + MXC_CCM_CGR1, 12);98 clk[sim_gate] = imx_clk_gate2("sim_gate", "per", base + MXC_CCM_CGR1, 14);99 clk[ect_gate] = imx_clk_gate2("ect_gate", "per", base + MXC_CCM_CGR1, 16);100 clk[usb_gate] = imx_clk_gate2("usb_gate", "ahb", base + MXC_CCM_CGR1, 18);101 clk[kpp_gate] = imx_clk_gate2("kpp_gate", "ipg", base + MXC_CCM_CGR1, 20);102 clk[ipu_gate] = imx_clk_gate2("ipu_gate", "hsp", base + MXC_CCM_CGR1, 22);103 clk[uart3_gate] = imx_clk_gate2("uart3_gate", "per", base + MXC_CCM_CGR1, 24);104 clk[uart4_gate] = imx_clk_gate2("uart4_gate", "per", base + MXC_CCM_CGR1, 26);105 clk[uart5_gate] = imx_clk_gate2("uart5_gate", "per", base + MXC_CCM_CGR1, 28);106 clk[owire_gate] = imx_clk_gate2("owire_gate", "per", base + MXC_CCM_CGR1, 30);107 clk[ssi2_gate] = imx_clk_gate2("ssi2_gate", "spll", base + MXC_CCM_CGR2, 0);108 clk[cspi1_gate] = imx_clk_gate2("cspi1_gate", "ipg", base + MXC_CCM_CGR2, 2);109 clk[cspi2_gate] = imx_clk_gate2("cspi2_gate", "ipg", base + MXC_CCM_CGR2, 4);110 clk[gacc_gate] = imx_clk_gate2("gacc_gate", "per", base + MXC_CCM_CGR2, 6);111 clk[emi_gate] = imx_clk_gate2("emi_gate", "ahb", base + MXC_CCM_CGR2, 8);112 clk[rtic_gate] = imx_clk_gate2("rtic_gate", "ahb", base + MXC_CCM_CGR2, 10);113 clk[firi_gate] = imx_clk_gate2("firi_gate", "upll", base+MXC_CCM_CGR2, 12);114 115 imx_check_clocks(clk, ARRAY_SIZE(clk));116 117 clk_set_parent(clk[csi], clk[upll]);118 clk_prepare_enable(clk[emi_gate]);119 clk_prepare_enable(clk[iim_gate]);120 mx31_revision();121 clk_disable_unprepare(clk[iim_gate]);122}123 124static void __init mx31_clocks_init_dt(struct device_node *np)125{126 struct device_node *osc_np;127 u32 fref = 26000000; /* default */128 void __iomem *ccm;129 130 for_each_compatible_node(osc_np, NULL, "fixed-clock") {131 if (!of_device_is_compatible(osc_np, "fsl,imx-osc26m"))132 continue;133 134 if (!of_property_read_u32(osc_np, "clock-frequency", &fref)) {135 of_node_put(osc_np);136 break;137 }138 }139 140 ccm = of_iomap(np, 0);141 if (!ccm)142 panic("%s: failed to map registers\n", __func__);143 144 _mx31_clocks_init(ccm, fref);145 146 clk_data.clks = clk;147 clk_data.clk_num = ARRAY_SIZE(clk);148 of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);149}150 151CLK_OF_DECLARE(imx31_ccm, "fsl,imx31-ccm", mx31_clocks_init_dt);152