1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/clk.h> 3 #include <linux/clk-provider.h> 4 #include <linux/clkdev.h> 5 #include <linux/err.h> 6 #include <linux/io.h> 7 #include <linux/of.h> 8 #include <linux/of_address.h> 9 #include <dt-bindings/clock/imx27-clock.h> 10 #include <soc/imx/revision.h> 11 #include <asm/irq.h> 12 13 #include "clk.h" 14 15 #define MX27_CCM_BASE_ADDR 0x10027000 16 #define MX27_GPT1_BASE_ADDR 0x10003000 17 #define MX27_INT_GPT1 (NR_IRQS_LEGACY + 26) 18 19 static void __iomem *ccm __initdata; 20 21 /* Register offsets */ 22 #define CCM_CSCR (ccm + 0x00) 23 #define CCM_MPCTL0 (ccm + 0x04) 24 #define CCM_MPCTL1 (ccm + 0x08) 25 #define CCM_SPCTL0 (ccm + 0x0c) 26 #define CCM_SPCTL1 (ccm + 0x10) 27 #define CCM_PCDR0 (ccm + 0x18) 28 #define CCM_PCDR1 (ccm + 0x1c) 29 #define CCM_PCCR0 (ccm + 0x20) 30 #define CCM_PCCR1 (ccm + 0x24) 31 #define CCM_CCSR (ccm + 0x28) 32 33 static const char *vpu_sel_clks[] = { "spll", "mpll_main2", }; 34 static const char *cpu_sel_clks[] = { "mpll_main2", "mpll", }; 35 static const char *mpll_sel_clks[] = { "fpm", "mpll_osc_sel", }; 36 static const char *mpll_osc_sel_clks[] = { "ckih_gate", "ckih_div1p5", }; 37 static const char *clko_sel_clks[] = { 38 "ckil", "fpm", "ckih_gate", "ckih_gate", 39 "ckih_gate", "mpll", "spll", "cpu_div", 40 "ahb", "ipg", "per1_div", "per2_div", 41 "per3_div", "per4_div", "ssi1_div", "ssi2_div", 42 "nfc_div", "mshc_div", "vpu_div", "60m", 43 "32k", "usb_div", "dptc", 44 }; 45 46 static const char *ssi_sel_clks[] = { "spll_gate", "mpll", }; 47 48 static struct clk *clk[IMX27_CLK_MAX]; 49 static struct clk_onecell_data clk_data; 50 51 static void __init _mx27_clocks_init(unsigned long fref) 52 { 53 BUG_ON(!ccm); 54 55 clk[IMX27_CLK_DUMMY] = imx_clk_fixed("dummy", 0); 56 clk[IMX27_CLK_CKIH] = imx_clk_fixed("ckih", fref); 57 clk[IMX27_CLK_CKIL] = imx_clk_fixed("ckil", 32768); 58 clk[IMX27_CLK_FPM] = imx_clk_fixed_factor("fpm", "ckil", 1024, 1); 59 clk[IMX27_CLK_CKIH_DIV1P5] = imx_clk_fixed_factor("ckih_div1p5", "ckih_gate", 2, 3); 60 clk[IMX27_CLK_CKIH_GATE] = imx_clk_gate_dis("ckih_gate", "ckih", CCM_CSCR, 3); 61 clk[IMX27_CLK_MPLL_OSC_SEL] = imx_clk_mux("mpll_osc_sel", CCM_CSCR, 4, 1, mpll_osc_sel_clks, ARRAY_SIZE(mpll_osc_sel_clks)); 62 clk[IMX27_CLK_MPLL_SEL] = imx_clk_mux("mpll_sel", CCM_CSCR, 16, 1, mpll_sel_clks, ARRAY_SIZE(mpll_sel_clks)); 63 clk[IMX27_CLK_MPLL] = imx_clk_pllv1(IMX_PLLV1_IMX27, "mpll", "mpll_sel", CCM_MPCTL0); 64 clk[IMX27_CLK_SPLL] = imx_clk_pllv1(IMX_PLLV1_IMX27, "spll", "ckih_gate", CCM_SPCTL0); 65 clk[IMX27_CLK_SPLL_GATE] = imx_clk_gate("spll_gate", "spll", CCM_CSCR, 1); 66 clk[IMX27_CLK_MPLL_MAIN2] = imx_clk_fixed_factor("mpll_main2", "mpll", 2, 3); 67 68 if (mx27_revision() >= IMX_CHIP_REVISION_2_0) { 69 clk[IMX27_CLK_AHB] = imx_clk_divider("ahb", "mpll_main2", CCM_CSCR, 8, 2); 70 clk[IMX27_CLK_IPG] = imx_clk_fixed_factor("ipg", "ahb", 1, 2); 71 } else { 72 clk[IMX27_CLK_AHB] = imx_clk_divider("ahb", "mpll_main2", CCM_CSCR, 9, 4); 73 clk[IMX27_CLK_IPG] = imx_clk_divider("ipg", "ahb", CCM_CSCR, 8, 1); 74 } 75 76 clk[IMX27_CLK_MSHC_DIV] = imx_clk_divider("mshc_div", "ahb", CCM_PCDR0, 0, 6); 77 clk[IMX27_CLK_NFC_DIV] = imx_clk_divider("nfc_div", "ahb", CCM_PCDR0, 6, 4); 78 clk[IMX27_CLK_PER1_DIV] = imx_clk_divider("per1_div", "mpll_main2", CCM_PCDR1, 0, 6); 79 clk[IMX27_CLK_PER2_DIV] = imx_clk_divider("per2_div", "mpll_main2", CCM_PCDR1, 8, 6); 80 clk[IMX27_CLK_PER3_DIV] = imx_clk_divider("per3_div", "mpll_main2", CCM_PCDR1, 16, 6); 81 clk[IMX27_CLK_PER4_DIV] = imx_clk_divider("per4_div", "mpll_main2", CCM_PCDR1, 24, 6); 82 clk[IMX27_CLK_VPU_SEL] = imx_clk_mux("vpu_sel", CCM_CSCR, 21, 1, vpu_sel_clks, ARRAY_SIZE(vpu_sel_clks)); 83 clk[IMX27_CLK_VPU_DIV] = imx_clk_divider("vpu_div", "vpu_sel", CCM_PCDR0, 10, 6); 84 clk[IMX27_CLK_USB_DIV] = imx_clk_divider("usb_div", "spll_gate", CCM_CSCR, 28, 3); 85 clk[IMX27_CLK_CPU_SEL] = imx_clk_mux("cpu_sel", CCM_CSCR, 15, 1, cpu_sel_clks, ARRAY_SIZE(cpu_sel_clks)); 86 clk[IMX27_CLK_CLKO_SEL] = imx_clk_mux("clko_sel", CCM_CCSR, 0, 5, clko_sel_clks, ARRAY_SIZE(clko_sel_clks)); 87 88 if (mx27_revision() >= IMX_CHIP_REVISION_2_0) 89 clk[IMX27_CLK_CPU_DIV] = imx_clk_divider("cpu_div", "cpu_sel", CCM_CSCR, 12, 2); 90 else 91 clk[IMX27_CLK_CPU_DIV] = imx_clk_divider("cpu_div", "cpu_sel", CCM_CSCR, 13, 3); 92 93 clk[IMX27_CLK_CLKO_DIV] = imx_clk_divider("clko_div", "clko_sel", CCM_PCDR0, 22, 3); 94 clk[IMX27_CLK_SSI1_SEL] = imx_clk_mux("ssi1_sel", CCM_CSCR, 22, 1, ssi_sel_clks, ARRAY_SIZE(ssi_sel_clks)); 95 clk[IMX27_CLK_SSI2_SEL] = imx_clk_mux("ssi2_sel", CCM_CSCR, 23, 1, ssi_sel_clks, ARRAY_SIZE(ssi_sel_clks)); 96 clk[IMX27_CLK_SSI1_DIV] = imx_clk_divider("ssi1_div", "ssi1_sel", CCM_PCDR0, 16, 6); 97 clk[IMX27_CLK_SSI2_DIV] = imx_clk_divider("ssi2_div", "ssi2_sel", CCM_PCDR0, 26, 6); 98 clk[IMX27_CLK_CLKO_EN] = imx_clk_gate("clko_en", "clko_div", CCM_PCCR0, 0); 99 clk[IMX27_CLK_SSI2_IPG_GATE] = imx_clk_gate("ssi2_ipg_gate", "ipg", CCM_PCCR0, 0); 100 clk[IMX27_CLK_SSI1_IPG_GATE] = imx_clk_gate("ssi1_ipg_gate", "ipg", CCM_PCCR0, 1); 101 clk[IMX27_CLK_SLCDC_IPG_GATE] = imx_clk_gate("slcdc_ipg_gate", "ipg", CCM_PCCR0, 2); 102 clk[IMX27_CLK_SDHC3_IPG_GATE] = imx_clk_gate("sdhc3_ipg_gate", "ipg", CCM_PCCR0, 3); 103 clk[IMX27_CLK_SDHC2_IPG_GATE] = imx_clk_gate("sdhc2_ipg_gate", "ipg", CCM_PCCR0, 4); 104 clk[IMX27_CLK_SDHC1_IPG_GATE] = imx_clk_gate("sdhc1_ipg_gate", "ipg", CCM_PCCR0, 5); 105 clk[IMX27_CLK_SCC_IPG_GATE] = imx_clk_gate("scc_ipg_gate", "ipg", CCM_PCCR0, 6); 106 clk[IMX27_CLK_SAHARA_IPG_GATE] = imx_clk_gate("sahara_ipg_gate", "ipg", CCM_PCCR0, 7); 107 clk[IMX27_CLK_RTIC_IPG_GATE] = imx_clk_gate("rtic_ipg_gate", "ipg", CCM_PCCR0, 8); 108 clk[IMX27_CLK_RTC_IPG_GATE] = imx_clk_gate("rtc_ipg_gate", "ipg", CCM_PCCR0, 9); 109 clk[IMX27_CLK_PWM_IPG_GATE] = imx_clk_gate("pwm_ipg_gate", "ipg", CCM_PCCR0, 11); 110 clk[IMX27_CLK_OWIRE_IPG_GATE] = imx_clk_gate("owire_ipg_gate", "ipg", CCM_PCCR0, 12); 111 clk[IMX27_CLK_MSHC_IPG_GATE] = imx_clk_gate("mshc_ipg_gate", "ipg", CCM_PCCR0, 13); 112 clk[IMX27_CLK_LCDC_IPG_GATE] = imx_clk_gate("lcdc_ipg_gate", "ipg", CCM_PCCR0, 14); 113 clk[IMX27_CLK_KPP_IPG_GATE] = imx_clk_gate("kpp_ipg_gate", "ipg", CCM_PCCR0, 15); 114 clk[IMX27_CLK_IIM_IPG_GATE] = imx_clk_gate("iim_ipg_gate", "ipg", CCM_PCCR0, 16); 115 clk[IMX27_CLK_I2C2_IPG_GATE] = imx_clk_gate("i2c2_ipg_gate", "ipg", CCM_PCCR0, 17); 116 clk[IMX27_CLK_I2C1_IPG_GATE] = imx_clk_gate("i2c1_ipg_gate", "ipg", CCM_PCCR0, 18); 117 clk[IMX27_CLK_GPT6_IPG_GATE] = imx_clk_gate("gpt6_ipg_gate", "ipg", CCM_PCCR0, 19); 118 clk[IMX27_CLK_GPT5_IPG_GATE] = imx_clk_gate("gpt5_ipg_gate", "ipg", CCM_PCCR0, 20); 119 clk[IMX27_CLK_GPT4_IPG_GATE] = imx_clk_gate("gpt4_ipg_gate", "ipg", CCM_PCCR0, 21); 120 clk[IMX27_CLK_GPT3_IPG_GATE] = imx_clk_gate("gpt3_ipg_gate", "ipg", CCM_PCCR0, 22); 121 clk[IMX27_CLK_GPT2_IPG_GATE] = imx_clk_gate("gpt2_ipg_gate", "ipg", CCM_PCCR0, 23); 122 clk[IMX27_CLK_GPT1_IPG_GATE] = imx_clk_gate("gpt1_ipg_gate", "ipg", CCM_PCCR0, 24); 123 clk[IMX27_CLK_GPIO_IPG_GATE] = imx_clk_gate("gpio_ipg_gate", "ipg", CCM_PCCR0, 25); 124 clk[IMX27_CLK_FEC_IPG_GATE] = imx_clk_gate("fec_ipg_gate", "ipg", CCM_PCCR0, 26); 125 clk[IMX27_CLK_EMMA_IPG_GATE] = imx_clk_gate("emma_ipg_gate", "ipg", CCM_PCCR0, 27); 126 clk[IMX27_CLK_DMA_IPG_GATE] = imx_clk_gate("dma_ipg_gate", "ipg", CCM_PCCR0, 28); 127 clk[IMX27_CLK_CSPI3_IPG_GATE] = imx_clk_gate("cspi3_ipg_gate", "ipg", CCM_PCCR0, 29); 128 clk[IMX27_CLK_CSPI2_IPG_GATE] = imx_clk_gate("cspi2_ipg_gate", "ipg", CCM_PCCR0, 30); 129 clk[IMX27_CLK_CSPI1_IPG_GATE] = imx_clk_gate("cspi1_ipg_gate", "ipg", CCM_PCCR0, 31); 130 clk[IMX27_CLK_MSHC_BAUD_GATE] = imx_clk_gate("mshc_baud_gate", "mshc_div", CCM_PCCR1, 2); 131 clk[IMX27_CLK_NFC_BAUD_GATE] = imx_clk_gate("nfc_baud_gate", "nfc_div", CCM_PCCR1, 3); 132 clk[IMX27_CLK_SSI2_BAUD_GATE] = imx_clk_gate("ssi2_baud_gate", "ssi2_div", CCM_PCCR1, 4); 133 clk[IMX27_CLK_SSI1_BAUD_GATE] = imx_clk_gate("ssi1_baud_gate", "ssi1_div", CCM_PCCR1, 5); 134 clk[IMX27_CLK_VPU_BAUD_GATE] = imx_clk_gate("vpu_baud_gate", "vpu_div", CCM_PCCR1, 6); 135 clk[IMX27_CLK_PER4_GATE] = imx_clk_gate("per4_gate", "per4_div", CCM_PCCR1, 7); 136 clk[IMX27_CLK_PER3_GATE] = imx_clk_gate("per3_gate", "per3_div", CCM_PCCR1, 8); 137 clk[IMX27_CLK_PER2_GATE] = imx_clk_gate("per2_gate", "per2_div", CCM_PCCR1, 9); 138 clk[IMX27_CLK_PER1_GATE] = imx_clk_gate("per1_gate", "per1_div", CCM_PCCR1, 10); 139 clk[IMX27_CLK_USB_AHB_GATE] = imx_clk_gate("usb_ahb_gate", "ahb", CCM_PCCR1, 11); 140 clk[IMX27_CLK_SLCDC_AHB_GATE] = imx_clk_gate("slcdc_ahb_gate", "ahb", CCM_PCCR1, 12); 141 clk[IMX27_CLK_SAHARA_AHB_GATE] = imx_clk_gate("sahara_ahb_gate", "ahb", CCM_PCCR1, 13); 142 clk[IMX27_CLK_RTIC_AHB_GATE] = imx_clk_gate("rtic_ahb_gate", "ahb", CCM_PCCR1, 14); 143 clk[IMX27_CLK_LCDC_AHB_GATE] = imx_clk_gate("lcdc_ahb_gate", "ahb", CCM_PCCR1, 15); 144 clk[IMX27_CLK_VPU_AHB_GATE] = imx_clk_gate("vpu_ahb_gate", "ahb", CCM_PCCR1, 16); 145 clk[IMX27_CLK_FEC_AHB_GATE] = imx_clk_gate("fec_ahb_gate", "ahb", CCM_PCCR1, 17); 146 clk[IMX27_CLK_EMMA_AHB_GATE] = imx_clk_gate("emma_ahb_gate", "ahb", CCM_PCCR1, 18); 147 clk[IMX27_CLK_EMI_AHB_GATE] = imx_clk_gate("emi_ahb_gate", "ahb", CCM_PCCR1, 19); 148 clk[IMX27_CLK_DMA_AHB_GATE] = imx_clk_gate("dma_ahb_gate", "ahb", CCM_PCCR1, 20); 149 clk[IMX27_CLK_CSI_AHB_GATE] = imx_clk_gate("csi_ahb_gate", "ahb", CCM_PCCR1, 21); 150 clk[IMX27_CLK_BROM_AHB_GATE] = imx_clk_gate("brom_ahb_gate", "ahb", CCM_PCCR1, 22); 151 clk[IMX27_CLK_ATA_AHB_GATE] = imx_clk_gate("ata_ahb_gate", "ahb", CCM_PCCR1, 23); 152 clk[IMX27_CLK_WDOG_IPG_GATE] = imx_clk_gate("wdog_ipg_gate", "ipg", CCM_PCCR1, 24); 153 clk[IMX27_CLK_USB_IPG_GATE] = imx_clk_gate("usb_ipg_gate", "ipg", CCM_PCCR1, 25); 154 clk[IMX27_CLK_UART6_IPG_GATE] = imx_clk_gate("uart6_ipg_gate", "ipg", CCM_PCCR1, 26); 155 clk[IMX27_CLK_UART5_IPG_GATE] = imx_clk_gate("uart5_ipg_gate", "ipg", CCM_PCCR1, 27); 156 clk[IMX27_CLK_UART4_IPG_GATE] = imx_clk_gate("uart4_ipg_gate", "ipg", CCM_PCCR1, 28); 157 clk[IMX27_CLK_UART3_IPG_GATE] = imx_clk_gate("uart3_ipg_gate", "ipg", CCM_PCCR1, 29); 158 clk[IMX27_CLK_UART2_IPG_GATE] = imx_clk_gate("uart2_ipg_gate", "ipg", CCM_PCCR1, 30); 159 clk[IMX27_CLK_UART1_IPG_GATE] = imx_clk_gate("uart1_ipg_gate", "ipg", CCM_PCCR1, 31); 160 161 imx_check_clocks(clk, ARRAY_SIZE(clk)); 162 163 clk_register_clkdev(clk[IMX27_CLK_CPU_DIV], NULL, "cpu0"); 164 165 clk_prepare_enable(clk[IMX27_CLK_EMI_AHB_GATE]); 166 167 imx_register_uart_clocks(); 168 169 imx_print_silicon_rev("i.MX27", mx27_revision()); 170 } 171 172 static void __init mx27_clocks_init_dt(struct device_node *np) 173 { 174 struct device_node *refnp; 175 u32 fref = 26000000; /* default */ 176 177 for_each_compatible_node(refnp, NULL, "fixed-clock") { 178 if (!of_device_is_compatible(refnp, "fsl,imx-osc26m")) 179 continue; 180 181 if (!of_property_read_u32(refnp, "clock-frequency", &fref)) { 182 of_node_put(refnp); 183 break; 184 } 185 } 186 187 ccm = of_iomap(np, 0); 188 189 _mx27_clocks_init(fref); 190 191 clk_data.clks = clk; 192 clk_data.clk_num = ARRAY_SIZE(clk); 193 of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); 194 } 195 CLK_OF_DECLARE(imx27_ccm, "fsl,imx27-ccm", mx27_clocks_init_dt); 196