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
26 static 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
37 static const char *mpll_osc_sel_clks[] = { "ckih_gate", "ckih_div1p5", };
38 static const char *mpll_sel_clks[] = { "fpm_gate", "mpll_osc_sel", };
39 static const char *spll_sel_clks[] = { "fpm_gate", "mpll_osc_sel", };
40 static const char *ssi_sel_clks[] = { "spll_gate", "mpll_gate", };
41
42 static struct clk *clk[IMX21_CLK_MAX];
43 static struct clk_onecell_data clk_data;
44
_mx21_clocks_init(unsigned long lref,unsigned long href)45 static 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
mx21_clocks_init(unsigned long lref,unsigned long href)125 int __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
mx21_clocks_init_dt(struct device_node * np)164 static 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 }
174 CLK_OF_DECLARE(imx27_ccm, "fsl,imx21-ccm", mx21_clocks_init_dt);
175
