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cd73785f SH |
1 | /* |
2 | * Copyright (C) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along | |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
16 | */ | |
17 | ||
cd73785f | 18 | #include <linux/clk.h> |
cd73785f | 19 | #include <linux/clkdev.h> |
ac36187b | 20 | #include <linux/clk-provider.h> |
cd73785f | 21 | #include <linux/err.h> |
ac36187b AS |
22 | #include <linux/init.h> |
23 | #include <linux/of.h> | |
24 | #include <linux/of_address.h> | |
25 | #include <dt-bindings/clock/imx1-clock.h> | |
cd73785f | 26 | |
cd73785f | 27 | #include "clk.h" |
e3372474 | 28 | #include "common.h" |
50f2de61 | 29 | #include "hardware.h" |
cd73785f | 30 | |
cd73785f | 31 | static const char *prem_sel_clks[] = { "clk32_premult", "clk16m", }; |
402e4a4c AS |
32 | static const char *clko_sel_clks[] = { "per1", "hclk", "clk48m", "clk16m", |
33 | "prem", "fclk", }; | |
34 | ||
ac36187b AS |
35 | static struct clk *clk[IMX1_CLK_MAX]; |
36 | static struct clk_onecell_data clk_data; | |
cd73785f | 37 | |
ac36187b AS |
38 | static void __iomem *ccm __initdata; |
39 | #define CCM_CSCR (ccm + 0x0000) | |
40 | #define CCM_MPCTL0 (ccm + 0x0004) | |
41 | #define CCM_SPCTL0 (ccm + 0x000c) | |
42 | #define CCM_PCDR (ccm + 0x0020) | |
43 | #define SCM_GCCR (ccm + 0x0810) | |
cd73785f | 44 | |
ac36187b | 45 | static void __init _mx1_clocks_init(unsigned long fref) |
cd73785f | 46 | { |
ac36187b AS |
47 | clk[IMX1_CLK_DUMMY] = imx_clk_fixed("dummy", 0); |
48 | clk[IMX1_CLK_CLK32] = imx_obtain_fixed_clock("clk32", fref); | |
49 | clk[IMX1_CLK_CLK16M_EXT] = imx_clk_fixed("clk16m_ext", 16000000); | |
50 | clk[IMX1_CLK_CLK16M] = imx_clk_gate("clk16m", "clk16m_ext", CCM_CSCR, 17); | |
51 | clk[IMX1_CLK_CLK32_PREMULT] = imx_clk_fixed_factor("clk32_premult", "clk32", 512, 1); | |
52 | clk[IMX1_CLK_PREM] = imx_clk_mux("prem", CCM_CSCR, 16, 1, prem_sel_clks, ARRAY_SIZE(prem_sel_clks)); | |
3bec5f81 | 53 | clk[IMX1_CLK_MPLL] = imx_clk_pllv1(IMX_PLLV1_IMX1, "mpll", "clk32_premult", CCM_MPCTL0); |
ac36187b | 54 | clk[IMX1_CLK_MPLL_GATE] = imx_clk_gate("mpll_gate", "mpll", CCM_CSCR, 0); |
3bec5f81 | 55 | clk[IMX1_CLK_SPLL] = imx_clk_pllv1(IMX_PLLV1_IMX1, "spll", "prem", CCM_SPCTL0); |
ac36187b AS |
56 | clk[IMX1_CLK_SPLL_GATE] = imx_clk_gate("spll_gate", "spll", CCM_CSCR, 1); |
57 | clk[IMX1_CLK_MCU] = imx_clk_divider("mcu", "clk32_premult", CCM_CSCR, 15, 1); | |
58 | clk[IMX1_CLK_FCLK] = imx_clk_divider("fclk", "mpll_gate", CCM_CSCR, 15, 1); | |
59 | clk[IMX1_CLK_HCLK] = imx_clk_divider("hclk", "spll_gate", CCM_CSCR, 10, 4); | |
60 | clk[IMX1_CLK_CLK48M] = imx_clk_divider("clk48m", "spll_gate", CCM_CSCR, 26, 3); | |
61 | clk[IMX1_CLK_PER1] = imx_clk_divider("per1", "spll_gate", CCM_PCDR, 0, 4); | |
62 | clk[IMX1_CLK_PER2] = imx_clk_divider("per2", "spll_gate", CCM_PCDR, 4, 4); | |
63 | clk[IMX1_CLK_PER3] = imx_clk_divider("per3", "spll_gate", CCM_PCDR, 16, 7); | |
64 | clk[IMX1_CLK_CLKO] = imx_clk_mux("clko", CCM_CSCR, 29, 3, clko_sel_clks, ARRAY_SIZE(clko_sel_clks)); | |
65 | clk[IMX1_CLK_UART3_GATE] = imx_clk_gate("uart3_gate", "hclk", SCM_GCCR, 6); | |
66 | clk[IMX1_CLK_SSI2_GATE] = imx_clk_gate("ssi2_gate", "hclk", SCM_GCCR, 5); | |
67 | clk[IMX1_CLK_BROM_GATE] = imx_clk_gate("brom_gate", "hclk", SCM_GCCR, 4); | |
68 | clk[IMX1_CLK_DMA_GATE] = imx_clk_gate("dma_gate", "hclk", SCM_GCCR, 3); | |
69 | clk[IMX1_CLK_CSI_GATE] = imx_clk_gate("csi_gate", "hclk", SCM_GCCR, 2); | |
70 | clk[IMX1_CLK_MMA_GATE] = imx_clk_gate("mma_gate", "hclk", SCM_GCCR, 1); | |
71 | clk[IMX1_CLK_USBD_GATE] = imx_clk_gate("usbd_gate", "clk48m", SCM_GCCR, 0); | |
cd73785f | 72 | |
229be9c1 | 73 | imx_check_clocks(clk, ARRAY_SIZE(clk)); |
ac36187b AS |
74 | } |
75 | ||
76 | int __init mx1_clocks_init(unsigned long fref) | |
77 | { | |
5ab96a8d SG |
78 | ccm = ioremap(MX1_CCM_BASE_ADDR, SZ_4K); |
79 | BUG_ON(!ccm); | |
ac36187b AS |
80 | |
81 | _mx1_clocks_init(fref); | |
82 | ||
f4696752 AS |
83 | clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx-gpt.0"); |
84 | clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx-gpt.0"); | |
ac36187b AS |
85 | clk_register_clkdev(clk[IMX1_CLK_DMA_GATE], "ahb", "imx1-dma"); |
86 | clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-dma"); | |
87 | clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.0"); | |
88 | clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-uart.0"); | |
89 | clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.1"); | |
90 | clk_register_clkdev(clk[IMX1_CLK_HCLK], "ipg", "imx1-uart.1"); | |
91 | clk_register_clkdev(clk[IMX1_CLK_PER1], "per", "imx1-uart.2"); | |
92 | clk_register_clkdev(clk[IMX1_CLK_UART3_GATE], "ipg", "imx1-uart.2"); | |
93 | clk_register_clkdev(clk[IMX1_CLK_HCLK], NULL, "imx1-i2c.0"); | |
94 | clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-cspi.0"); | |
95 | clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-cspi.0"); | |
96 | clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-cspi.1"); | |
97 | clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-cspi.1"); | |
98 | clk_register_clkdev(clk[IMX1_CLK_PER2], "per", "imx1-fb.0"); | |
99 | clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ipg", "imx1-fb.0"); | |
100 | clk_register_clkdev(clk[IMX1_CLK_DUMMY], "ahb", "imx1-fb.0"); | |
cd73785f | 101 | |
6c529c49 | 102 | mxc_timer_init(MX1_TIM1_BASE_ADDR, MX1_TIM1_INT); |
cd73785f SH |
103 | |
104 | return 0; | |
105 | } | |
ac36187b AS |
106 | |
107 | static void __init mx1_clocks_init_dt(struct device_node *np) | |
108 | { | |
109 | ccm = of_iomap(np, 0); | |
110 | BUG_ON(!ccm); | |
111 | ||
112 | _mx1_clocks_init(32768); | |
113 | ||
114 | clk_data.clks = clk; | |
115 | clk_data.clk_num = ARRAY_SIZE(clk); | |
116 | of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); | |
ac36187b AS |
117 | } |
118 | CLK_OF_DECLARE(imx1_ccm, "fsl,imx1-ccm", mx1_clocks_init_dt); |