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git01.mediatek.com / filogic / uboot / 1ef91feb56a849f1ac19a7c5460b20fdd1f43c83 / . / arch / arm / mach-uniphier / clk / pll-ld4.c
blob: 6a145a3baa12752daf1c9abe63e3692d308d2406 [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -0400[diff] [blame]1// SPDX-License-Identifier: GPL-2.0+
Masahiro Yamada9d6652c2016-09-17 03:33:09 +0900[diff] [blame]2/*
3 * Copyright (C) 2013-2014 Panasonic Corporation
4 * Copyright (C) 2015-2016 Socionext Inc.
Masahiro Yamada9d6652c2016-09-17 03:33:09 +0900[diff] [blame]5 */
6
Masahiro Yamadaeb6aeca2017-01-21 18:05:25 +0900[diff] [blame]7#include <linux/delay.h>
Masahiro Yamada9d6652c2016-09-17 03:33:09 +0900[diff] [blame]8#include <linux/io.h>
9
10#include "../init.h"
11#include "../sc-regs.h"
12#include "../sg-regs.h"
13#include "pll.h"
14
15static void upll_init(void)
16{
17 u32 tmp, clk_mode_upll, clk_mode_axosel;
18
19 tmp = readl(SG_PINMON0);
20 clk_mode_upll = tmp & SG_PINMON0_CLK_MODE_UPLLSRC_MASK;
21 clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
22
23 /* set 0 to SNRT(UPLLCTRL.bit28) and K_LD(UPLLCTRL.bit[27]) */
24 tmp = readl(SC_UPLLCTRL);
25 tmp &= ~0x18000000;
26 writel(tmp, SC_UPLLCTRL);
27
28 if (clk_mode_upll == SG_PINMON0_CLK_MODE_UPLLSRC_DEFAULT) {
29 if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_U ||
30 clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_A) {
31 /* AXO: 25MHz */
32 tmp &= ~0x07ffffff;
33 tmp |= 0x0228f5c0;
34 } else {
35 /* AXO: default 24.576MHz */
36 tmp &= ~0x07ffffff;
37 tmp |= 0x02328000;
38 }
39 }
40
41 writel(tmp, SC_UPLLCTRL);
42
43 /* set 1 to K_LD(UPLLCTRL.bit[27]) */
44 tmp |= 0x08000000;
45 writel(tmp, SC_UPLLCTRL);
46
47 /* wait 10 usec */
48 udelay(10);
49
50 /* set 1 to SNRT(UPLLCTRL.bit[28]) */
51 tmp |= 0x10000000;
52 writel(tmp, SC_UPLLCTRL);
53}
54
55static void vpll_init(void)
56{
57 u32 tmp, clk_mode_axosel;
58
59 tmp = readl(SG_PINMON0);
60 clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
61
62 /* set 1 to VPLA27WP and VPLA27WP */
63 tmp = readl(SC_VPLL27ACTRL);
64 tmp |= 0x00000001;
65 writel(tmp, SC_VPLL27ACTRL);
66 tmp = readl(SC_VPLL27BCTRL);
67 tmp |= 0x00000001;
68 writel(tmp, SC_VPLL27BCTRL);
69
70 /* Set 0 to VPLA_K_LD and VPLB_K_LD */
71 tmp = readl(SC_VPLL27ACTRL3);
72 tmp &= ~0x10000000;
73 writel(tmp, SC_VPLL27ACTRL3);
74 tmp = readl(SC_VPLL27BCTRL3);
75 tmp &= ~0x10000000;
76 writel(tmp, SC_VPLL27BCTRL3);
77
78 /* Set 0 to VPLA_SNRST and VPLB_SNRST */
79 tmp = readl(SC_VPLL27ACTRL2);
80 tmp &= ~0x10000000;
81 writel(tmp, SC_VPLL27ACTRL2);
82 tmp = readl(SC_VPLL27BCTRL2);
83 tmp &= ~0x10000000;
84 writel(tmp, SC_VPLL27BCTRL2);
85
86 /* Set 0x20 to VPLA_SNRST and VPLB_SNRST */
87 tmp = readl(SC_VPLL27ACTRL2);
88 tmp &= ~0x0000007f;
89 tmp |= 0x00000020;
90 writel(tmp, SC_VPLL27ACTRL2);
91 tmp = readl(SC_VPLL27BCTRL2);
92 tmp &= ~0x0000007f;
93 tmp |= 0x00000020;
94 writel(tmp, SC_VPLL27BCTRL2);
95
96 if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_U ||
97 clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ_A) {
98 /* AXO: 25MHz */
99 tmp = readl(SC_VPLL27ACTRL3);
100 tmp &= ~0x000fffff;
101 tmp |= 0x00066664;
102 writel(tmp, SC_VPLL27ACTRL3);
103 tmp = readl(SC_VPLL27BCTRL3);
104 tmp &= ~0x000fffff;
105 tmp |= 0x00066664;
106 writel(tmp, SC_VPLL27BCTRL3);
107 } else {
108 /* AXO: default 24.576MHz */
109 tmp = readl(SC_VPLL27ACTRL3);
110 tmp &= ~0x000fffff;
111 tmp |= 0x000f5800;
112 writel(tmp, SC_VPLL27ACTRL3);
113 tmp = readl(SC_VPLL27BCTRL3);
114 tmp &= ~0x000fffff;
115 tmp |= 0x000f5800;
116 writel(tmp, SC_VPLL27BCTRL3);
117 }
118
119 /* Set 1 to VPLA_K_LD and VPLB_K_LD */
120 tmp = readl(SC_VPLL27ACTRL3);
121 tmp |= 0x10000000;
122 writel(tmp, SC_VPLL27ACTRL3);
123 tmp = readl(SC_VPLL27BCTRL3);
124 tmp |= 0x10000000;
125 writel(tmp, SC_VPLL27BCTRL3);
126
127 /* wait 10 usec */
128 udelay(10);
129
130 /* Set 0 to VPLA_SNRST and VPLB_SNRST */
131 tmp = readl(SC_VPLL27ACTRL2);
132 tmp |= 0x10000000;
133 writel(tmp, SC_VPLL27ACTRL2);
134 tmp = readl(SC_VPLL27BCTRL2);
135 tmp |= 0x10000000;
136 writel(tmp, SC_VPLL27BCTRL2);
137
138 /* set 0 to VPLA27WP and VPLA27WP */
139 tmp = readl(SC_VPLL27ACTRL);
140 tmp &= ~0x00000001;
141 writel(tmp, SC_VPLL27ACTRL);
142 tmp = readl(SC_VPLL27BCTRL);
143 tmp |= ~0x00000001;
144 writel(tmp, SC_VPLL27BCTRL);
145}
146
147void uniphier_ld4_pll_init(void)
148{
149 upll_init();
150 vpll_init();
151 uniphier_ld4_dpll_ssc_en();
152}