summaryrefslogtreecommitdiff
path: root/drivers/clk/imx/clk-imx35.c
blob: 0fe5ac210156607231a1390a5372c21cd3b89c0e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
 */
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/clkdev.h>
#include <linux/of.h>
#include <linux/err.h>
#include <soc/imx/revision.h>
#include <soc/imx/timer.h>
#include <asm/irq.h>

#include "clk.h"

#define MX35_CCM_BASE_ADDR	0x53f80000
#define MX35_GPT1_BASE_ADDR	0x53f90000
#define MX35_INT_GPT		(NR_IRQS_LEGACY + 29)

#define MXC_CCM_PDR0		0x04
#define MX35_CCM_PDR2		0x0c
#define MX35_CCM_PDR3		0x10
#define MX35_CCM_PDR4		0x14
#define MX35_CCM_MPCTL		0x1c
#define MX35_CCM_PPCTL		0x20
#define MX35_CCM_CGR0		0x2c
#define MX35_CCM_CGR1		0x30
#define MX35_CCM_CGR2		0x34
#define MX35_CCM_CGR3		0x38

struct arm_ahb_div {
	unsigned char arm, ahb, sel;
};

static struct arm_ahb_div clk_consumer[] = {
	{ .arm = 1, .ahb = 4, .sel = 0},
	{ .arm = 1, .ahb = 3, .sel = 1},
	{ .arm = 2, .ahb = 2, .sel = 0},
	{ .arm = 0, .ahb = 0, .sel = 0},
	{ .arm = 0, .ahb = 0, .sel = 0},
	{ .arm = 0, .ahb = 0, .sel = 0},
	{ .arm = 4, .ahb = 1, .sel = 0},
	{ .arm = 1, .ahb = 5, .sel = 0},
	{ .arm = 1, .ahb = 8, .sel = 0},
	{ .arm = 1, .ahb = 6, .sel = 1},
	{ .arm = 2, .ahb = 4, .sel = 0},
	{ .arm = 0, .ahb = 0, .sel = 0},
	{ .arm = 0, .ahb = 0, .sel = 0},
	{ .arm = 0, .ahb = 0, .sel = 0},
	{ .arm = 4, .ahb = 2, .sel = 0},
	{ .arm = 0, .ahb = 0, .sel = 0},
};

static char hsp_div_532[] = { 4, 8, 3, 0 };
static char hsp_div_400[] = { 3, 6, 3, 0 };

static struct clk_onecell_data clk_data;

static const char *std_sel[] = {"ppll", "arm"};
static const char *ipg_per_sel[] = {"ahb_per_div", "arm_per_div"};

enum mx35_clks {
	/*  0 */ ckih, mpll, ppll, mpll_075, arm, hsp, hsp_div, hsp_sel, ahb,
	/*  9 */ ipg, arm_per_div, ahb_per_div, ipg_per, uart_sel, uart_div,
	/* 15 */ esdhc_sel, esdhc1_div, esdhc2_div, esdhc3_div, spdif_sel,
	/* 20 */ spdif_div_pre, spdif_div_post, ssi_sel, ssi1_div_pre,
	/* 24 */ ssi1_div_post, ssi2_div_pre, ssi2_div_post, usb_sel, usb_div,
	/* 29 */ nfc_div, asrc_gate, pata_gate, audmux_gate, can1_gate,
	/* 34 */ can2_gate, cspi1_gate, cspi2_gate, ect_gate, edio_gate,
	/* 39 */ emi_gate, epit1_gate, epit2_gate, esai_gate, esdhc1_gate,
	/* 44 */ esdhc2_gate, esdhc3_gate, fec_gate, gpio1_gate, gpio2_gate,
	/* 49 */ gpio3_gate, gpt_gate, i2c1_gate, i2c2_gate, i2c3_gate,
	/* 54 */ iomuxc_gate, ipu_gate, kpp_gate, mlb_gate, mshc_gate,
	/* 59 */ owire_gate, pwm_gate, rngc_gate, rtc_gate, rtic_gate, scc_gate,
	/* 65 */ sdma_gate, spba_gate, spdif_gate, ssi1_gate, ssi2_gate,
	/* 70 */ uart1_gate, uart2_gate, uart3_gate, usbotg_gate, wdog_gate,
	/* 75 */ max_gate, admux_gate, csi_gate, csi_div, csi_sel, iim_gate,
	/* 81 */ gpu2d_gate, ckil, clk_max
};

static struct clk *clk[clk_max];

static void __init _mx35_clocks_init(void)
{
	void __iomem *base;
	u32 pdr0, consumer_sel, hsp_sel;
	struct arm_ahb_div *aad;
	unsigned char *hsp_div;

	base = ioremap(MX35_CCM_BASE_ADDR, SZ_4K);
	BUG_ON(!base);

	pdr0 = __raw_readl(base + MXC_CCM_PDR0);
	consumer_sel = (pdr0 >> 16) & 0xf;
	aad = &clk_consumer[consumer_sel];
	if (!aad->arm) {
		pr_err("i.MX35 clk: illegal consumer mux selection 0x%x\n", consumer_sel);
		/*
		 * We are basically stuck. Continue with a default entry and hope we
		 * get far enough to actually show the above message
		 */
		aad = &clk_consumer[0];
	}

	clk[ckih] = imx_clk_fixed("ckih", 24000000);
	clk[ckil] = imx_clk_fixed("ckil", 32768);
	clk[mpll] = imx_clk_pllv1(IMX_PLLV1_IMX35, "mpll", "ckih", base + MX35_CCM_MPCTL);
	clk[ppll] = imx_clk_pllv1(IMX_PLLV1_IMX35, "ppll", "ckih", base + MX35_CCM_PPCTL);

	clk[mpll] = imx_clk_fixed_factor("mpll_075", "mpll", 3, 4);

	if (aad->sel)
		clk[arm] = imx_clk_fixed_factor("arm", "mpll_075", 1, aad->arm);
	else
		clk[arm] = imx_clk_fixed_factor("arm", "mpll", 1, aad->arm);

	if (clk_get_rate(clk[arm]) > 400000000)
		hsp_div = hsp_div_532;
	else
		hsp_div = hsp_div_400;

	hsp_sel = (pdr0 >> 20) & 0x3;
	if (!hsp_div[hsp_sel]) {
		pr_err("i.MX35 clk: illegal hsp clk selection 0x%x\n", hsp_sel);
		hsp_sel = 0;
	}

	clk[hsp] = imx_clk_fixed_factor("hsp", "arm", 1, hsp_div[hsp_sel]);

	clk[ahb] = imx_clk_fixed_factor("ahb", "arm", 1, aad->ahb);
	clk[ipg] = imx_clk_fixed_factor("ipg", "ahb", 1, 2);

	clk[arm_per_div] = imx_clk_divider("arm_per_div", "arm", base + MX35_CCM_PDR4, 16, 6);
	clk[ahb_per_div] = imx_clk_divider("ahb_per_div", "ahb", base + MXC_CCM_PDR0, 12, 3);
	clk[ipg_per] = imx_clk_mux("ipg_per", base + MXC_CCM_PDR0, 26, 1, ipg_per_sel, ARRAY_SIZE(ipg_per_sel));

	clk[uart_sel] = imx_clk_mux("uart_sel", base + MX35_CCM_PDR3, 14, 1, std_sel, ARRAY_SIZE(std_sel));
	clk[uart_div] = imx_clk_divider("uart_div", "uart_sel", base + MX35_CCM_PDR4, 10, 6);

	clk[esdhc_sel] = imx_clk_mux("esdhc_sel", base + MX35_CCM_PDR4, 9, 1, std_sel, ARRAY_SIZE(std_sel));
	clk[esdhc1_div] = imx_clk_divider("esdhc1_div", "esdhc_sel", base + MX35_CCM_PDR3, 0, 6);
	clk[esdhc2_div] = imx_clk_divider("esdhc2_div", "esdhc_sel", base + MX35_CCM_PDR3, 8, 6);
	clk[esdhc3_div] = imx_clk_divider("esdhc3_div", "esdhc_sel", base + MX35_CCM_PDR3, 16, 6);

	clk[spdif_sel] = imx_clk_mux("spdif_sel", base + MX35_CCM_PDR3, 22, 1, std_sel, ARRAY_SIZE(std_sel));
	clk[spdif_div_pre] = imx_clk_divider("spdif_div_pre", "spdif_sel", base + MX35_CCM_PDR3, 29, 3); /* divide by 1 not allowed */ 
	clk[spdif_div_post] = imx_clk_divider("spdif_div_post", "spdif_div_pre", base + MX35_CCM_PDR3, 23, 6);

	clk[ssi_sel] = imx_clk_mux("ssi_sel", base + MX35_CCM_PDR2, 6, 1, std_sel, ARRAY_SIZE(std_sel));
	clk[ssi1_div_pre] = imx_clk_divider("ssi1_div_pre", "ssi_sel", base + MX35_CCM_PDR2, 24, 3);
	clk[ssi1_div_post] = imx_clk_divider("ssi1_div_post", "ssi1_div_pre", base + MX35_CCM_PDR2, 0, 6);
	clk[ssi2_div_pre] = imx_clk_divider("ssi2_div_pre", "ssi_sel", base + MX35_CCM_PDR2, 27, 3);
	clk[ssi2_div_post] = imx_clk_divider("ssi2_div_post", "ssi2_div_pre", base + MX35_CCM_PDR2, 8, 6);

	clk[usb_sel] = imx_clk_mux("usb_sel", base + MX35_CCM_PDR4, 9, 1, std_sel, ARRAY_SIZE(std_sel));
	clk[usb_div] = imx_clk_divider("usb_div", "usb_sel", base + MX35_CCM_PDR4, 22, 6);

	clk[nfc_div] = imx_clk_divider("nfc_div", "ahb", base + MX35_CCM_PDR4, 28, 4);

	clk[csi_sel] = imx_clk_mux("csi_sel", base + MX35_CCM_PDR2, 7, 1, std_sel, ARRAY_SIZE(std_sel));
	clk[csi_div] = imx_clk_divider("csi_div", "csi_sel", base + MX35_CCM_PDR2, 16, 6);

	clk[asrc_gate] = imx_clk_gate2("asrc_gate", "ipg", base + MX35_CCM_CGR0,  0);
	clk[pata_gate] = imx_clk_gate2("pata_gate", "ipg", base + MX35_CCM_CGR0,  2);
	clk[audmux_gate] = imx_clk_gate2("audmux_gate", "ipg", base + MX35_CCM_CGR0,  4);
	clk[can1_gate] = imx_clk_gate2("can1_gate", "ipg", base + MX35_CCM_CGR0,  6);
	clk[can2_gate] = imx_clk_gate2("can2_gate", "ipg", base + MX35_CCM_CGR0,  8);
	clk[cspi1_gate] = imx_clk_gate2("cspi1_gate", "ipg", base + MX35_CCM_CGR0, 10);
	clk[cspi2_gate] = imx_clk_gate2("cspi2_gate", "ipg", base + MX35_CCM_CGR0, 12);
	clk[ect_gate] = imx_clk_gate2("ect_gate", "ipg", base + MX35_CCM_CGR0, 14);
	clk[edio_gate] = imx_clk_gate2("edio_gate",   "ipg", base + MX35_CCM_CGR0, 16);
	clk[emi_gate] = imx_clk_gate2("emi_gate", "ipg", base + MX35_CCM_CGR0, 18);
	clk[epit1_gate] = imx_clk_gate2("epit1_gate", "ipg", base + MX35_CCM_CGR0, 20);
	clk[epit2_gate] = imx_clk_gate2("epit2_gate", "ipg", base + MX35_CCM_CGR0, 22);
	clk[esai_gate] = imx_clk_gate2("esai_gate",   "ipg", base + MX35_CCM_CGR0, 24);
	clk[esdhc1_gate] = imx_clk_gate2("esdhc1_gate", "esdhc1_div", base + MX35_CCM_CGR0, 26);
	clk[esdhc2_gate] = imx_clk_gate2("esdhc2_gate", "esdhc2_div", base + MX35_CCM_CGR0, 28);
	clk[esdhc3_gate] = imx_clk_gate2("esdhc3_gate", "esdhc3_div", base + MX35_CCM_CGR0, 30);

	clk[fec_gate] = imx_clk_gate2("fec_gate", "ipg", base + MX35_CCM_CGR1,  0);
	clk[gpio1_gate] = imx_clk_gate2("gpio1_gate", "ipg", base + MX35_CCM_CGR1,  2);
	clk[gpio2_gate] = imx_clk_gate2("gpio2_gate", "ipg", base + MX35_CCM_CGR1,  4);
	clk[gpio3_gate] = imx_clk_gate2("gpio3_gate", "ipg", base + MX35_CCM_CGR1,  6);
	clk[gpt_gate] = imx_clk_gate2("gpt_gate", "ipg", base + MX35_CCM_CGR1,  8);
	clk[i2c1_gate] = imx_clk_gate2("i2c1_gate", "ipg_per", base + MX35_CCM_CGR1, 10);
	clk[i2c2_gate] = imx_clk_gate2("i2c2_gate", "ipg_per", base + MX35_CCM_CGR1, 12);
	clk[i2c3_gate] = imx_clk_gate2("i2c3_gate", "ipg_per", base + MX35_CCM_CGR1, 14);
	clk[iomuxc_gate] = imx_clk_gate2("iomuxc_gate", "ipg", base + MX35_CCM_CGR1, 16);
	clk[ipu_gate] = imx_clk_gate2("ipu_gate", "hsp", base + MX35_CCM_CGR1, 18);
	clk[kpp_gate] = imx_clk_gate2("kpp_gate", "ipg", base + MX35_CCM_CGR1, 20);
	clk[mlb_gate] = imx_clk_gate2("mlb_gate", "ahb", base + MX35_CCM_CGR1, 22);
	clk[mshc_gate] = imx_clk_gate2("mshc_gate", "dummy", base + MX35_CCM_CGR1, 24);
	clk[owire_gate] = imx_clk_gate2("owire_gate", "ipg_per", base + MX35_CCM_CGR1, 26);
	clk[pwm_gate] = imx_clk_gate2("pwm_gate", "ipg_per", base + MX35_CCM_CGR1, 28);
	clk[rngc_gate] = imx_clk_gate2("rngc_gate", "ipg", base + MX35_CCM_CGR1, 30);

	clk[rtc_gate] = imx_clk_gate2("rtc_gate", "ipg", base + MX35_CCM_CGR2,  0);
	clk[rtic_gate] = imx_clk_gate2("rtic_gate", "ahb", base + MX35_CCM_CGR2,  2);
	clk[scc_gate] = imx_clk_gate2("scc_gate", "ipg", base + MX35_CCM_CGR2,  4);
	clk[sdma_gate] = imx_clk_gate2("sdma_gate", "ahb", base + MX35_CCM_CGR2,  6);
	clk[spba_gate] = imx_clk_gate2("spba_gate", "ipg", base + MX35_CCM_CGR2,  8);
	clk[spdif_gate] = imx_clk_gate2("spdif_gate", "spdif_div_post", base + MX35_CCM_CGR2, 10);
	clk[ssi1_gate] = imx_clk_gate2("ssi1_gate", "ssi1_div_post", base + MX35_CCM_CGR2, 12);
	clk[ssi2_gate] = imx_clk_gate2("ssi2_gate", "ssi2_div_post", base + MX35_CCM_CGR2, 14);
	clk[uart1_gate] = imx_clk_gate2("uart1_gate", "uart_div", base + MX35_CCM_CGR2, 16);
	clk[uart2_gate] = imx_clk_gate2("uart2_gate", "uart_div", base + MX35_CCM_CGR2, 18);
	clk[uart3_gate] = imx_clk_gate2("uart3_gate", "uart_div", base + MX35_CCM_CGR2, 20);
	clk[usbotg_gate] = imx_clk_gate2("usbotg_gate", "ahb", base + MX35_CCM_CGR2, 22);
	clk[wdog_gate] = imx_clk_gate2("wdog_gate", "ipg", base + MX35_CCM_CGR2, 24);
	clk[max_gate] = imx_clk_gate2("max_gate", "dummy", base + MX35_CCM_CGR2, 26);
	clk[admux_gate] = imx_clk_gate2("admux_gate", "ipg", base + MX35_CCM_CGR2, 30);

	clk[csi_gate] = imx_clk_gate2("csi_gate", "csi_div", base + MX35_CCM_CGR3,  0);
	clk[iim_gate] = imx_clk_gate2("iim_gate", "ipg", base + MX35_CCM_CGR3,  2);
	clk[gpu2d_gate] = imx_clk_gate2("gpu2d_gate", "ahb", base + MX35_CCM_CGR3,  4);

	imx_check_clocks(clk, ARRAY_SIZE(clk));

	clk_prepare_enable(clk[spba_gate]);
	clk_prepare_enable(clk[gpio1_gate]);
	clk_prepare_enable(clk[gpio2_gate]);
	clk_prepare_enable(clk[gpio3_gate]);
	clk_prepare_enable(clk[iim_gate]);
	clk_prepare_enable(clk[emi_gate]);
	clk_prepare_enable(clk[max_gate]);
	clk_prepare_enable(clk[iomuxc_gate]);

	/*
	 * SCC is needed to boot via mmc after a watchdog reset. The clock code
	 * before conversion to common clk also enabled UART1 (which isn't
	 * handled here and not needed for mmc) and IIM (which is enabled
	 * unconditionally above).
	 */
	clk_prepare_enable(clk[scc_gate]);

	imx_register_uart_clocks(4);

	imx_print_silicon_rev("i.MX35", mx35_revision());
}

static void __init mx35_clocks_init_dt(struct device_node *ccm_node)
{
	_mx35_clocks_init();

	clk_data.clks = clk;
	clk_data.clk_num = ARRAY_SIZE(clk);
	of_clk_add_provider(ccm_node, of_clk_src_onecell_get, &clk_data);
}
CLK_OF_DECLARE(imx35, "fsl,imx35-ccm", mx35_clocks_init_dt);