1/* 2 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. 3 * Copyright 2008 Juergen Beisert, kernel@pengutronix.de 4 * Copyright 2008 Martin Fuzzey, mfuzzey@gmail.com 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 */ 11 12#include <linux/clk-provider.h> 13#include <linux/clkdev.h> 14#include <linux/of.h> 15#include <linux/of_address.h> 16#include <dt-bindings/clock/imx21-clock.h> 17#include <soc/imx/timer.h> 18#include <asm/irq.h> 19 20#include "clk.h" 21 22#define MX21_CCM_BASE_ADDR 0x10027000 23#define MX21_GPT1_BASE_ADDR 0x10003000 24#define MX21_INT_GPT1 (NR_IRQS_LEGACY + 26) 25 26static void __iomem *ccm __initdata; 27 28/* Register offsets */ 29#define CCM_CSCR (ccm + 0x00) 30#define CCM_MPCTL0 (ccm + 0x04) 31#define CCM_SPCTL0 (ccm + 0x0c) 32#define CCM_PCDR0 (ccm + 0x18) 33#define CCM_PCDR1 (ccm + 0x1c) 34#define CCM_PCCR0 (ccm + 0x20) 35#define CCM_PCCR1 (ccm + 0x24) 36 37static const char *mpll_osc_sel_clks[] = { "ckih_gate", "ckih_div1p5", }; 38static const char *mpll_sel_clks[] = { "fpm_gate", "mpll_osc_sel", }; 39static const char *spll_sel_clks[] = { "fpm_gate", "mpll_osc_sel", }; 40static const char *ssi_sel_clks[] = { "spll_gate", "mpll_gate", }; 41 42static struct clk *clk[IMX21_CLK_MAX]; 43static struct clk_onecell_data clk_data; 44 45static void __init _mx21_clocks_init(unsigned long lref, unsigned long href) 46{ 47 BUG_ON(!ccm); 48 49 clk[IMX21_CLK_DUMMY] = imx_clk_fixed("dummy", 0); 50 clk[IMX21_CLK_CKIL] = imx_obtain_fixed_clock("ckil", lref); 51 clk[IMX21_CLK_CKIH] = imx_obtain_fixed_clock("ckih", href); 52 clk[IMX21_CLK_FPM] = imx_clk_fixed_factor("fpm", "ckil", 512, 1); 53 clk[IMX21_CLK_CKIH_DIV1P5] = imx_clk_fixed_factor("ckih_div1p5", "ckih_gate", 2, 3); 54 55 clk[IMX21_CLK_MPLL_GATE] = imx_clk_gate("mpll_gate", "mpll", CCM_CSCR, 0); 56 clk[IMX21_CLK_SPLL_GATE] = imx_clk_gate("spll_gate", "spll", CCM_CSCR, 1); 57 clk[IMX21_CLK_FPM_GATE] = imx_clk_gate("fpm_gate", "fpm", CCM_CSCR, 2); 58 clk[IMX21_CLK_CKIH_GATE] = imx_clk_gate_dis("ckih_gate", "ckih", CCM_CSCR, 3); 59 clk[IMX21_CLK_MPLL_OSC_SEL] = imx_clk_mux("mpll_osc_sel", CCM_CSCR, 4, 1, mpll_osc_sel_clks, ARRAY_SIZE(mpll_osc_sel_clks)); 60 clk[IMX21_CLK_IPG] = imx_clk_divider("ipg", "hclk", CCM_CSCR, 9, 1); 61 clk[IMX21_CLK_HCLK] = imx_clk_divider("hclk", "fclk", CCM_CSCR, 10, 4); 62 clk[IMX21_CLK_MPLL_SEL] = imx_clk_mux("mpll_sel", CCM_CSCR, 16, 1, mpll_sel_clks, ARRAY_SIZE(mpll_sel_clks)); 63 clk[IMX21_CLK_SPLL_SEL] = imx_clk_mux("spll_sel", CCM_CSCR, 17, 1, spll_sel_clks, ARRAY_SIZE(spll_sel_clks)); 64 clk[IMX21_CLK_SSI1_SEL] = imx_clk_mux("ssi1_sel", CCM_CSCR, 19, 1, ssi_sel_clks, ARRAY_SIZE(ssi_sel_clks)); 65 clk[IMX21_CLK_SSI2_SEL] = imx_clk_mux("ssi2_sel", CCM_CSCR, 20, 1, ssi_sel_clks, ARRAY_SIZE(ssi_sel_clks)); 66 clk[IMX21_CLK_USB_DIV] = imx_clk_divider("usb_div", "spll_gate", CCM_CSCR, 26, 3); 67 clk[IMX21_CLK_FCLK] = imx_clk_divider("fclk", "mpll_gate", CCM_CSCR, 29, 3); 68 69 clk[IMX21_CLK_MPLL] = imx_clk_pllv1(IMX_PLLV1_IMX21, "mpll", "mpll_sel", CCM_MPCTL0); 70 71 clk[IMX21_CLK_SPLL] = imx_clk_pllv1(IMX_PLLV1_IMX21, "spll", "spll_sel", CCM_SPCTL0); 72 73 clk[IMX21_CLK_NFC_DIV] = imx_clk_divider("nfc_div", "fclk", CCM_PCDR0, 12, 4); 74 clk[IMX21_CLK_SSI1_DIV] = imx_clk_divider("ssi1_div", "ssi1_sel", CCM_PCDR0, 16, 6); 75 clk[IMX21_CLK_SSI2_DIV] = imx_clk_divider("ssi2_div", "ssi2_sel", CCM_PCDR0, 26, 6); 76 77 clk[IMX21_CLK_PER1] = imx_clk_divider("per1", "mpll_gate", CCM_PCDR1, 0, 6); 78 clk[IMX21_CLK_PER2] = imx_clk_divider("per2", "mpll_gate", CCM_PCDR1, 8, 6); 79 clk[IMX21_CLK_PER3] = imx_clk_divider("per3", "mpll_gate", CCM_PCDR1, 16, 6); 80 clk[IMX21_CLK_PER4] = imx_clk_divider("per4", "mpll_gate", CCM_PCDR1, 24, 6); 81 82 clk[IMX21_CLK_UART1_IPG_GATE] = imx_clk_gate("uart1_ipg_gate", "ipg", CCM_PCCR0, 0); 83 clk[IMX21_CLK_UART2_IPG_GATE] = imx_clk_gate("uart2_ipg_gate", "ipg", CCM_PCCR0, 1); 84 clk[IMX21_CLK_UART3_IPG_GATE] = imx_clk_gate("uart3_ipg_gate", "ipg", CCM_PCCR0, 2); 85 clk[IMX21_CLK_UART4_IPG_GATE] = imx_clk_gate("uart4_ipg_gate", "ipg", CCM_PCCR0, 3); 86 clk[IMX21_CLK_CSPI1_IPG_GATE] = imx_clk_gate("cspi1_ipg_gate", "ipg", CCM_PCCR0, 4); 87 clk[IMX21_CLK_CSPI2_IPG_GATE] = imx_clk_gate("cspi2_ipg_gate", "ipg", CCM_PCCR0, 5); 88 clk[IMX21_CLK_SSI1_GATE] = imx_clk_gate("ssi1_gate", "ipg", CCM_PCCR0, 6); 89 clk[IMX21_CLK_SSI2_GATE] = imx_clk_gate("ssi2_gate", "ipg", CCM_PCCR0, 7); 90 clk[IMX21_CLK_SDHC1_IPG_GATE] = imx_clk_gate("sdhc1_ipg_gate", "ipg", CCM_PCCR0, 9); 91 clk[IMX21_CLK_SDHC2_IPG_GATE] = imx_clk_gate("sdhc2_ipg_gate", "ipg", CCM_PCCR0, 10); 92 clk[IMX21_CLK_GPIO_GATE] = imx_clk_gate("gpio_gate", "ipg", CCM_PCCR0, 11); 93 clk[IMX21_CLK_I2C_GATE] = imx_clk_gate("i2c_gate", "ipg", CCM_PCCR0, 12); 94 clk[IMX21_CLK_DMA_GATE] = imx_clk_gate("dma_gate", "ipg", CCM_PCCR0, 13); 95 clk[IMX21_CLK_USB_GATE] = imx_clk_gate("usb_gate", "usb_div", CCM_PCCR0, 14); 96 clk[IMX21_CLK_EMMA_GATE] = imx_clk_gate("emma_gate", "ipg", CCM_PCCR0, 15); 97 clk[IMX21_CLK_SSI2_BAUD_GATE] = imx_clk_gate("ssi2_baud_gate", "ipg", CCM_PCCR0, 16); 98 clk[IMX21_CLK_SSI1_BAUD_GATE] = imx_clk_gate("ssi1_baud_gate", "ipg", CCM_PCCR0, 17); 99 clk[IMX21_CLK_LCDC_IPG_GATE] = imx_clk_gate("lcdc_ipg_gate", "ipg", CCM_PCCR0, 18); 100 clk[IMX21_CLK_NFC_GATE] = imx_clk_gate("nfc_gate", "nfc_div", CCM_PCCR0, 19); 101 clk[IMX21_CLK_SLCDC_HCLK_GATE] = imx_clk_gate("slcdc_hclk_gate", "hclk", CCM_PCCR0, 21); 102 clk[IMX21_CLK_PER4_GATE] = imx_clk_gate("per4_gate", "per4", CCM_PCCR0, 22); 103 clk[IMX21_CLK_BMI_GATE] = imx_clk_gate("bmi_gate", "hclk", CCM_PCCR0, 23); 104 clk[IMX21_CLK_USB_HCLK_GATE] = imx_clk_gate("usb_hclk_gate", "hclk", CCM_PCCR0, 24); 105 clk[IMX21_CLK_SLCDC_GATE] = imx_clk_gate("slcdc_gate", "hclk", CCM_PCCR0, 25); 106 clk[IMX21_CLK_LCDC_HCLK_GATE] = imx_clk_gate("lcdc_hclk_gate", "hclk", CCM_PCCR0, 26); 107 clk[IMX21_CLK_EMMA_HCLK_GATE] = imx_clk_gate("emma_hclk_gate", "hclk", CCM_PCCR0, 27); 108 clk[IMX21_CLK_BROM_GATE] = imx_clk_gate("brom_gate", "hclk", CCM_PCCR0, 28); 109 clk[IMX21_CLK_DMA_HCLK_GATE] = imx_clk_gate("dma_hclk_gate", "hclk", CCM_PCCR0, 30); 110 clk[IMX21_CLK_CSI_HCLK_GATE] = imx_clk_gate("csi_hclk_gate", "hclk", CCM_PCCR0, 31); 111 112 clk[IMX21_CLK_CSPI3_IPG_GATE] = imx_clk_gate("cspi3_ipg_gate", "ipg", CCM_PCCR1, 23); 113 clk[IMX21_CLK_WDOG_GATE] = imx_clk_gate("wdog_gate", "ipg", CCM_PCCR1, 24); 114 clk[IMX21_CLK_GPT1_IPG_GATE] = imx_clk_gate("gpt1_ipg_gate", "ipg", CCM_PCCR1, 25); 115 clk[IMX21_CLK_GPT2_IPG_GATE] = imx_clk_gate("gpt2_ipg_gate", "ipg", CCM_PCCR1, 26); 116 clk[IMX21_CLK_GPT3_IPG_GATE] = imx_clk_gate("gpt3_ipg_gate", "ipg", CCM_PCCR1, 27); 117 clk[IMX21_CLK_PWM_IPG_GATE] = imx_clk_gate("pwm_ipg_gate", "ipg", CCM_PCCR1, 28); 118 clk[IMX21_CLK_RTC_GATE] = imx_clk_gate("rtc_gate", "ipg", CCM_PCCR1, 29); 119 clk[IMX21_CLK_KPP_GATE] = imx_clk_gate("kpp_gate", "ipg", CCM_PCCR1, 30); 120 clk[IMX21_CLK_OWIRE_GATE] = imx_clk_gate("owire_gate", "ipg", CCM_PCCR1, 31); 121 122 imx_check_clocks(clk, ARRAY_SIZE(clk)); 123} 124 125int __init mx21_clocks_init(unsigned long lref, unsigned long href) 126{ 127 ccm = ioremap(MX21_CCM_BASE_ADDR, SZ_2K); 128 129 _mx21_clocks_init(lref, href); 130 131 clk_register_clkdev(clk[IMX21_CLK_PER1], "per", "imx21-uart.0"); 132 clk_register_clkdev(clk[IMX21_CLK_UART1_IPG_GATE], "ipg", "imx21-uart.0"); 133 clk_register_clkdev(clk[IMX21_CLK_PER1], "per", "imx21-uart.1"); 134 clk_register_clkdev(clk[IMX21_CLK_UART2_IPG_GATE], "ipg", "imx21-uart.1"); 135 clk_register_clkdev(clk[IMX21_CLK_PER1], "per", "imx21-uart.2"); 136 clk_register_clkdev(clk[IMX21_CLK_UART3_IPG_GATE], "ipg", "imx21-uart.2"); 137 clk_register_clkdev(clk[IMX21_CLK_PER1], "per", "imx21-uart.3"); 138 clk_register_clkdev(clk[IMX21_CLK_UART4_IPG_GATE], "ipg", "imx21-uart.3"); 139 clk_register_clkdev(clk[IMX21_CLK_GPT1_IPG_GATE], "ipg", "imx-gpt.0"); 140 clk_register_clkdev(clk[IMX21_CLK_PER1], "per", "imx-gpt.0"); 141 clk_register_clkdev(clk[IMX21_CLK_PER2], "per", "imx21-cspi.0"); 142 clk_register_clkdev(clk[IMX21_CLK_CSPI1_IPG_GATE], "ipg", "imx21-cspi.0"); 143 clk_register_clkdev(clk[IMX21_CLK_PER2], "per", "imx21-cspi.1"); 144 clk_register_clkdev(clk[IMX21_CLK_CSPI2_IPG_GATE], "ipg", "imx21-cspi.1"); 145 clk_register_clkdev(clk[IMX21_CLK_PER2], "per", "imx21-cspi.2"); 146 clk_register_clkdev(clk[IMX21_CLK_CSPI3_IPG_GATE], "ipg", "imx21-cspi.2"); 147 clk_register_clkdev(clk[IMX21_CLK_PER3], "per", "imx21-fb.0"); 148 clk_register_clkdev(clk[IMX21_CLK_LCDC_IPG_GATE], "ipg", "imx21-fb.0"); 149 clk_register_clkdev(clk[IMX21_CLK_LCDC_HCLK_GATE], "ahb", "imx21-fb.0"); 150 clk_register_clkdev(clk[IMX21_CLK_USB_GATE], "per", "imx21-hcd.0"); 151 clk_register_clkdev(clk[IMX21_CLK_USB_HCLK_GATE], "ahb", "imx21-hcd.0"); 152 clk_register_clkdev(clk[IMX21_CLK_NFC_GATE], NULL, "imx21-nand.0"); 153 clk_register_clkdev(clk[IMX21_CLK_DMA_HCLK_GATE], "ahb", "imx21-dma"); 154 clk_register_clkdev(clk[IMX21_CLK_DMA_GATE], "ipg", "imx21-dma"); 155 clk_register_clkdev(clk[IMX21_CLK_WDOG_GATE], NULL, "imx2-wdt.0"); 156 clk_register_clkdev(clk[IMX21_CLK_I2C_GATE], NULL, "imx21-i2c.0"); 157 clk_register_clkdev(clk[IMX21_CLK_OWIRE_GATE], NULL, "mxc_w1.0"); 158 159 mxc_timer_init(MX21_GPT1_BASE_ADDR, MX21_INT_GPT1, GPT_TYPE_IMX21); 160 161 return 0; 162} 163 164static void __init mx21_clocks_init_dt(struct device_node *np) 165{ 166 ccm = of_iomap(np, 0); 167 168 _mx21_clocks_init(32768, 26000000); 169 170 clk_data.clks = clk; 171 clk_data.clk_num = ARRAY_SIZE(clk); 172 of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); 173} 174CLK_OF_DECLARE(imx27_ccm, "fsl,imx21-ccm", mx21_clocks_init_dt); 175